./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/list-properties/list_search-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/list_search-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b1ea7ddff382751fa0e11562333bdb4981cac7bdbf1d356a007804e7e2e5a289 --- 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-6b4ec56 [2022-11-20 21:24:59,236 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 21:24:59,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 21:24:59,277 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 21:24:59,279 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 21:24:59,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 21:24:59,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 21:24:59,288 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 21:24:59,290 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 21:24:59,296 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 21:24:59,298 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 21:24:59,300 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 21:24:59,300 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 21:24:59,303 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 21:24:59,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 21:24:59,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 21:24:59,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 21:24:59,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 21:24:59,311 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 21:24:59,318 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 21:24:59,319 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 21:24:59,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 21:24:59,323 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 21:24:59,323 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 21:24:59,333 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 21:24:59,334 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 21:24:59,334 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 21:24:59,336 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 21:24:59,336 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 21:24:59,338 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 21:24:59,339 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 21:24:59,340 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 21:24:59,341 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 21:24:59,343 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 21:24:59,344 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 21:24:59,344 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 21:24:59,345 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 21:24:59,345 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 21:24:59,345 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 21:24:59,347 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 21:24:59,348 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 21:24:59,349 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2022-11-20 21:24:59,391 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 21:24:59,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 21:24:59,392 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 21:24:59,392 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 21:24:59,394 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 21:24:59,395 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 21:24:59,395 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 21:24:59,396 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 21:24:59,396 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 21:24:59,396 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 21:24:59,397 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 21:24:59,398 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 21:24:59,398 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 21:24:59,398 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 21:24:59,398 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 21:24:59,399 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 21:24:59,399 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 21:24:59,399 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 21:24:59,400 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 21:24:59,401 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 21:24:59,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 21:24:59,403 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 21:24:59,403 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 21:24:59,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 21:24:59,404 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 21:24:59,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 21:24:59,404 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 21:24:59,404 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 21:24:59,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 21:24:59,405 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 21:24:59,405 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 21:24:59,406 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 21:24:59,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 21:24:59,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 21:24:59,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:24:59,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 21:24:59,407 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 21:24:59,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 21:24:59,407 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 21:24:59,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 21:24:59,408 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 21:24:59,408 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_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1ea7ddff382751fa0e11562333bdb4981cac7bdbf1d356a007804e7e2e5a289 [2022-11-20 21:24:59,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 21:24:59,750 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 21:24:59,754 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 21:24:59,755 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 21:24:59,756 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 21:24:59,757 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/list-properties/list_search-2.i [2022-11-20 21:25:02,949 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 21:25:03,200 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 21:25:03,201 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/sv-benchmarks/c/list-properties/list_search-2.i [2022-11-20 21:25:03,214 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/data/0f5d88424/b504fef8e9e54c22b2a19dddac2753b1/FLAG29d92d7e9 [2022-11-20 21:25:03,228 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/data/0f5d88424/b504fef8e9e54c22b2a19dddac2753b1 [2022-11-20 21:25:03,236 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 21:25:03,238 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 21:25:03,240 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 21:25:03,240 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 21:25:03,244 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 21:25:03,245 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:25:03" (1/1) ... [2022-11-20 21:25:03,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f9c053 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:25:03, skipping insertion in model container [2022-11-20 21:25:03,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:25:03" (1/1) ... [2022-11-20 21:25:03,253 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 21:25:03,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:25:03,485 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/sv-benchmarks/c/list-properties/list_search-2.i[813,826] [2022-11-20 21:25:03,804 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:25:03,817 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) [2022-11-20 21:25:03,818 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@653d6df4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:25:03, skipping insertion in model container [2022-11-20 21:25:03,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 21:25:03,819 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-20 21:25:03,821 INFO L158 Benchmark]: Toolchain (without parser) took 581.49ms. Allocated memory is still 180.4MB. Free memory was 133.1MB in the beginning and 119.4MB in the end (delta: 13.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-20 21:25:03,821 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 142.6MB. Free memory is still 84.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 21:25:03,822 INFO L158 Benchmark]: CACSL2BoogieTranslator took 579.02ms. Allocated memory is still 180.4MB. Free memory was 132.5MB in the beginning and 119.4MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-20 21:25:03,824 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 142.6MB. Free memory is still 84.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 579.02ms. Allocated memory is still 180.4MB. Free memory was 132.5MB in the beginning and 119.4MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 792]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/list_search-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/config/svcomp-MemCleanup-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b1ea7ddff382751fa0e11562333bdb4981cac7bdbf1d356a007804e7e2e5a289 --- 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-6b4ec56 [2022-11-20 21:25:06,074 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 21:25:06,076 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 21:25:06,106 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 21:25:06,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 21:25:06,110 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 21:25:06,113 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 21:25:06,116 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 21:25:06,119 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 21:25:06,124 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 21:25:06,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 21:25:06,128 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 21:25:06,128 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 21:25:06,131 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 21:25:06,132 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 21:25:06,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 21:25:06,140 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 21:25:06,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 21:25:06,144 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 21:25:06,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 21:25:06,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 21:25:06,155 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 21:25:06,156 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 21:25:06,157 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 21:25:06,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 21:25:06,165 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 21:25:06,166 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 21:25:06,168 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 21:25:06,168 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 21:25:06,169 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 21:25:06,170 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 21:25:06,171 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 21:25:06,173 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 21:25:06,174 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 21:25:06,175 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 21:25:06,175 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 21:25:06,176 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 21:25:06,176 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 21:25:06,177 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 21:25:06,180 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 21:25:06,180 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 21:25:06,185 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/config/svcomp-MemCleanup-32bit-Taipan_Bitvector.epf [2022-11-20 21:25:06,248 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 21:25:06,248 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 21:25:06,249 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 21:25:06,249 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 21:25:06,250 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 21:25:06,250 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 21:25:06,250 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 21:25:06,251 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 21:25:06,251 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 21:25:06,251 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 21:25:06,251 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 21:25:06,252 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 21:25:06,253 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 21:25:06,253 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 21:25:06,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 21:25:06,253 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 21:25:06,254 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 21:25:06,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 21:25:06,254 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 21:25:06,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 21:25:06,255 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 21:25:06,255 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 21:25:06,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 21:25:06,256 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 21:25:06,256 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 21:25:06,256 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 21:25:06,257 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 21:25:06,257 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 21:25:06,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 21:25:06,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 21:25:06,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 21:25:06,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:25:06,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 21:25:06,259 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 21:25:06,259 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-20 21:25:06,259 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 21:25:06,259 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 21:25:06,260 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 21:25:06,260 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_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1ea7ddff382751fa0e11562333bdb4981cac7bdbf1d356a007804e7e2e5a289 [2022-11-20 21:25:06,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 21:25:06,679 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 21:25:06,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 21:25:06,683 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 21:25:06,684 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 21:25:06,685 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/list-properties/list_search-2.i [2022-11-20 21:25:09,772 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 21:25:10,059 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 21:25:10,060 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/sv-benchmarks/c/list-properties/list_search-2.i [2022-11-20 21:25:10,076 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/data/40a12565c/309dd1485eeb42e180a36bdbfe4fcade/FLAG4c30c5478 [2022-11-20 21:25:10,093 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/data/40a12565c/309dd1485eeb42e180a36bdbfe4fcade [2022-11-20 21:25:10,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 21:25:10,097 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 21:25:10,098 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 21:25:10,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 21:25:10,102 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 21:25:10,103 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:25:10" (1/1) ... [2022-11-20 21:25:10,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26e7e930 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:25:10, skipping insertion in model container [2022-11-20 21:25:10,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:25:10" (1/1) ... [2022-11-20 21:25:10,111 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 21:25:10,163 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:25:10,330 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/sv-benchmarks/c/list-properties/list_search-2.i[813,826] [2022-11-20 21:25:10,554 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:25:10,568 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-20 21:25:10,578 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:25:10,581 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/sv-benchmarks/c/list-properties/list_search-2.i[813,826] [2022-11-20 21:25:10,611 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:25:10,617 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 21:25:10,629 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/sv-benchmarks/c/list-properties/list_search-2.i[813,826] [2022-11-20 21:25:10,690 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:25:10,754 INFO L208 MainTranslator]: Completed translation [2022-11-20 21:25:10,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:25:10 WrapperNode [2022-11-20 21:25:10,755 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 21:25:10,756 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 21:25:10,756 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 21:25:10,756 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 21:25:10,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:25:10" (1/1) ... [2022-11-20 21:25:10,796 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:25:10" (1/1) ... [2022-11-20 21:25:10,832 INFO L138 Inliner]: procedures = 229, calls = 29, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 100 [2022-11-20 21:25:10,833 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 21:25:10,834 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 21:25:10,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 21:25:10,835 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 21:25:10,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:25:10" (1/1) ... [2022-11-20 21:25:10,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:25:10" (1/1) ... [2022-11-20 21:25:10,864 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:25:10" (1/1) ... [2022-11-20 21:25:10,864 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:25:10" (1/1) ... [2022-11-20 21:25:10,886 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:25:10" (1/1) ... [2022-11-20 21:25:10,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:25:10" (1/1) ... [2022-11-20 21:25:10,892 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:25:10" (1/1) ... [2022-11-20 21:25:10,893 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:25:10" (1/1) ... [2022-11-20 21:25:10,896 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 21:25:10,896 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 21:25:10,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 21:25:10,897 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 21:25:10,897 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:25:10" (1/1) ... [2022-11-20 21:25:10,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:25:10,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:25:10,940 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 21:25:10,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 21:25:10,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-20 21:25:10,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 21:25:10,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-20 21:25:10,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 21:25:10,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 21:25:10,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 21:25:10,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 21:25:10,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 21:25:10,990 INFO L130 BoogieDeclarations]: Found specification of procedure insert_list [2022-11-20 21:25:10,990 INFO L138 BoogieDeclarations]: Found implementation of procedure insert_list [2022-11-20 21:25:10,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 21:25:10,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 21:25:11,161 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 21:25:11,163 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 21:25:11,729 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 21:25:11,752 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 21:25:11,752 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-20 21:25:11,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:25:11 BoogieIcfgContainer [2022-11-20 21:25:11,754 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 21:25:11,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 21:25:11,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 21:25:11,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 21:25:11,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:25:10" (1/3) ... [2022-11-20 21:25:11,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b817ac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:25:11, skipping insertion in model container [2022-11-20 21:25:11,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:25:10" (2/3) ... [2022-11-20 21:25:11,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b817ac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:25:11, skipping insertion in model container [2022-11-20 21:25:11,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:25:11" (3/3) ... [2022-11-20 21:25:11,775 INFO L112 eAbstractionObserver]: Analyzing ICFG list_search-2.i [2022-11-20 21:25:11,798 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 21:25:11,798 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 33 error locations. [2022-11-20 21:25:11,857 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 21:25:11,863 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;@7d42e85a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 21:25:11,863 INFO L358 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2022-11-20 21:25:11,868 INFO L276 IsEmpty]: Start isEmpty. Operand has 91 states, 52 states have (on average 1.8653846153846154) internal successors, (97), 85 states have internal predecessors, (97), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 21:25:11,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 21:25:11,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:25:11,876 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 21:25:11,876 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-20 21:25:11,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:25:11,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1514693702, now seen corresponding path program 1 times [2022-11-20 21:25:11,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:25:11,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1381764930] [2022-11-20 21:25:11,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:11,900 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:25:11,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:25:11,906 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:25:11,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:25:12,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:25:12,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 21:25:12,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:12,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 21:25:12,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:25:12,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:25:12,163 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:25:12,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1381764930] [2022-11-20 21:25:12,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1381764930] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:25:12,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:25:12,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:25:12,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159605087] [2022-11-20 21:25:12,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:25:12,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:25:12,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:25:12,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:25:12,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:25:12,233 INFO L87 Difference]: Start difference. First operand has 91 states, 52 states have (on average 1.8653846153846154) internal successors, (97), 85 states have internal predecessors, (97), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:25:12,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:25:12,488 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2022-11-20 21:25:12,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:25:12,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 21:25:12,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:25:12,501 INFO L225 Difference]: With dead ends: 87 [2022-11-20 21:25:12,501 INFO L226 Difference]: Without dead ends: 85 [2022-11-20 21:25:12,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:25:12,506 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 11 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:25:12,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 140 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:25:12,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-20 21:25:12,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-11-20 21:25:12,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 79 states have internal predecessors, (86), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 21:25:12,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2022-11-20 21:25:12,563 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 6 [2022-11-20 21:25:12,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:25:12,564 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2022-11-20 21:25:12,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:25:12,565 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2022-11-20 21:25:12,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 21:25:12,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:25:12,566 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 21:25:12,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:25:12,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:25:12,784 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-20 21:25:12,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:25:12,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1514693703, now seen corresponding path program 1 times [2022-11-20 21:25:12,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:25:12,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [978590197] [2022-11-20 21:25:12,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:12,785 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 [2022-11-20 21:25:12,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:25:12,787 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:25:12,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:25:12,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:25:12,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 21:25:12,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:12,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 21:25:12,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:25:12,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:25:12,936 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:25:12,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [978590197] [2022-11-20 21:25:12,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [978590197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:25:12,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:25:12,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:25:12,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970420575] [2022-11-20 21:25:12,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:25:12,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:25:12,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:25:12,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:25:12,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:25:12,947 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:25:13,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:25:13,112 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2022-11-20 21:25:13,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:25:13,113 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 21:25:13,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:25:13,114 INFO L225 Difference]: With dead ends: 81 [2022-11-20 21:25:13,115 INFO L226 Difference]: Without dead ends: 81 [2022-11-20 21:25:13,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:25:13,116 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 7 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:25:13,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 141 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:25:13,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-20 21:25:13,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-11-20 21:25:13,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 51 states have (on average 1.607843137254902) internal successors, (82), 75 states have internal predecessors, (82), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 21:25:13,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2022-11-20 21:25:13,125 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 6 [2022-11-20 21:25:13,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:25:13,126 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2022-11-20 21:25:13,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:25:13,126 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2022-11-20 21:25:13,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-20 21:25:13,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:25:13,128 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:25:13,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:25:13,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:25:13,339 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-20 21:25:13,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:25:13,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1345131113, now seen corresponding path program 1 times [2022-11-20 21:25:13,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:25:13,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [383005810] [2022-11-20 21:25:13,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:13,342 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:25:13,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:25:13,344 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:25:13,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:25:13,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:25:13,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 21:25:13,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:13,759 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:25:13,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:25:13,914 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 21:25:13,914 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:25:13,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [383005810] [2022-11-20 21:25:13,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [383005810] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:25:13,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1067957417] [2022-11-20 21:25:13,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:13,915 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:25:13,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:25:13,922 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:25:13,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-20 21:25:14,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:25:14,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 21:25:14,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:14,195 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:25:14,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:25:14,282 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 21:25:14,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1067957417] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:25:14,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587578980] [2022-11-20 21:25:14,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:14,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:25:14,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:25:14,286 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:25:14,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 21:25:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:25:14,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 21:25:14,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:14,523 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:25:14,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:25:14,636 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 21:25:14,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587578980] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:25:14,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:25:14,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 7 [2022-11-20 21:25:14,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853254148] [2022-11-20 21:25:14,637 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:25:14,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 21:25:14,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:25:14,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 21:25:14,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:25:14,640 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-20 21:25:14,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:25:14,895 INFO L93 Difference]: Finished difference Result 111 states and 120 transitions. [2022-11-20 21:25:14,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 21:25:14,896 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2022-11-20 21:25:14,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:25:14,898 INFO L225 Difference]: With dead ends: 111 [2022-11-20 21:25:14,898 INFO L226 Difference]: Without dead ends: 111 [2022-11-20 21:25:14,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-11-20 21:25:14,903 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 92 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:25:14,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 339 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:25:14,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-20 21:25:14,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 86. [2022-11-20 21:25:14,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 55 states have (on average 1.5636363636363637) internal successors, (86), 79 states have internal predecessors, (86), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-20 21:25:14,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2022-11-20 21:25:14,917 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 40 [2022-11-20 21:25:14,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:25:14,918 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2022-11-20 21:25:14,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-20 21:25:14,918 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2022-11-20 21:25:14,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-20 21:25:14,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:25:14,920 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:25:14,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 21:25:15,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-11-20 21:25:15,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-20 21:25:15,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:25:15,528 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-20 21:25:15,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:25:15,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1982971279, now seen corresponding path program 1 times [2022-11-20 21:25:15,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:25:15,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [396155008] [2022-11-20 21:25:15,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:15,529 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:25:15,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:25:15,531 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:25:15,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-20 21:25:15,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:25:15,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 21:25:15,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:15,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 21:25:15,829 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 21:25:15,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:25:15,830 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:25:15,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [396155008] [2022-11-20 21:25:15,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [396155008] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:25:15,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:25:15,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:25:15,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443293144] [2022-11-20 21:25:15,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:25:15,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:25:15,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:25:15,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:25:15,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:25:15,833 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 21:25:16,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:25:16,236 INFO L93 Difference]: Finished difference Result 166 states and 180 transitions. [2022-11-20 21:25:16,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:25:16,237 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2022-11-20 21:25:16,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:25:16,239 INFO L225 Difference]: With dead ends: 166 [2022-11-20 21:25:16,239 INFO L226 Difference]: Without dead ends: 166 [2022-11-20 21:25:16,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:25:16,240 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 191 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:25:16,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 148 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 21:25:16,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-11-20 21:25:16,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 88. [2022-11-20 21:25:16,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 57 states have (on average 1.5789473684210527) internal successors, (90), 81 states have internal predecessors, (90), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-20 21:25:16,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 99 transitions. [2022-11-20 21:25:16,250 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 99 transitions. Word has length 40 [2022-11-20 21:25:16,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:25:16,251 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 99 transitions. [2022-11-20 21:25:16,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 21:25:16,252 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 99 transitions. [2022-11-20 21:25:16,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-20 21:25:16,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:25:16,253 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:25:16,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-11-20 21:25:16,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:25:16,466 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-20 21:25:16,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:25:16,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1982971278, now seen corresponding path program 1 times [2022-11-20 21:25:16,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:25:16,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [931301282] [2022-11-20 21:25:16,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:16,468 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:25:16,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:25:16,469 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:25:16,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-20 21:25:16,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:25:16,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 21:25:16,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:16,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 21:25:16,828 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 21:25:16,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:25:16,828 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:25:16,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [931301282] [2022-11-20 21:25:16,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [931301282] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:25:16,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:25:16,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:25:16,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871771494] [2022-11-20 21:25:16,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:25:16,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:25:16,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:25:16,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:25:16,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:25:16,832 INFO L87 Difference]: Start difference. First operand 88 states and 99 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 21:25:17,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:25:17,329 INFO L93 Difference]: Finished difference Result 184 states and 198 transitions. [2022-11-20 21:25:17,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:25:17,330 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2022-11-20 21:25:17,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:25:17,331 INFO L225 Difference]: With dead ends: 184 [2022-11-20 21:25:17,332 INFO L226 Difference]: Without dead ends: 184 [2022-11-20 21:25:17,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:25:17,333 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 217 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:25:17,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 156 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 21:25:17,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-20 21:25:17,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 97. [2022-11-20 21:25:17,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 66 states have (on average 1.621212121212121) internal successors, (107), 90 states have internal predecessors, (107), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-20 21:25:17,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 116 transitions. [2022-11-20 21:25:17,341 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 116 transitions. Word has length 40 [2022-11-20 21:25:17,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:25:17,341 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 116 transitions. [2022-11-20 21:25:17,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 21:25:17,342 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 116 transitions. [2022-11-20 21:25:17,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 21:25:17,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:25:17,343 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:25:17,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-11-20 21:25:17,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:25:17,555 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-20 21:25:17,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:25:17,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1718799074, now seen corresponding path program 1 times [2022-11-20 21:25:17,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:25:17,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1745914306] [2022-11-20 21:25:17,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:17,557 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:25:17,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:25:17,558 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:25:17,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:25:17,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:25:17,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 21:25:17,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:17,844 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 21:25:17,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:25:17,844 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:25:17,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1745914306] [2022-11-20 21:25:17,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1745914306] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:25:17,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:25:17,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 21:25:17,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605451848] [2022-11-20 21:25:17,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:25:17,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:25:17,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:25:17,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:25:17,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:25:17,847 INFO L87 Difference]: Start difference. First operand 97 states and 116 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 21:25:18,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:25:18,070 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2022-11-20 21:25:18,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:25:18,071 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2022-11-20 21:25:18,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:25:18,072 INFO L225 Difference]: With dead ends: 118 [2022-11-20 21:25:18,072 INFO L226 Difference]: Without dead ends: 118 [2022-11-20 21:25:18,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:25:18,076 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 94 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:25:18,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 242 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:25:18,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-20 21:25:18,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 97. [2022-11-20 21:25:18,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 66 states have (on average 1.5909090909090908) internal successors, (105), 90 states have internal predecessors, (105), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-20 21:25:18,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2022-11-20 21:25:18,083 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 43 [2022-11-20 21:25:18,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:25:18,084 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2022-11-20 21:25:18,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 21:25:18,085 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2022-11-20 21:25:18,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 21:25:18,086 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:25:18,086 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:25:18,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:25:18,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:25:18,296 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-20 21:25:18,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:25:18,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1717169730, now seen corresponding path program 1 times [2022-11-20 21:25:18,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:25:18,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [945951126] [2022-11-20 21:25:18,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:18,297 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:25:18,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:25:18,299 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:25:18,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-20 21:25:18,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:25:18,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-20 21:25:18,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:18,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 21:25:18,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 21:25:18,864 INFO L321 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2022-11-20 21:25:18,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2022-11-20 21:25:18,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 11 [2022-11-20 21:25:19,008 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:25:19,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:25:19,489 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:25:19,490 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:25:19,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [945951126] [2022-11-20 21:25:19,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [945951126] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:25:19,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [15846360] [2022-11-20 21:25:19,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:19,490 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:25:19,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:25:19,492 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:25:19,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-20 21:25:19,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:25:19,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 21:25:19,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:19,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 21:25:20,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 21:25:20,099 INFO L321 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2022-11-20 21:25:20,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2022-11-20 21:25:20,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 11 [2022-11-20 21:25:20,160 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:25:20,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:25:20,452 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:25:20,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [15846360] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:25:20,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795534956] [2022-11-20 21:25:20,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:20,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:25:20,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:25:20,454 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:25:20,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 21:25:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:25:20,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 21:25:20,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:20,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 21:25:20,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 21:25:21,065 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-20 21:25:21,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 39 [2022-11-20 21:25:21,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 [2022-11-20 21:25:21,229 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:25:21,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:25:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:25:21,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795534956] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:25:21,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 21:25:21,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11, 10, 11, 10] total 21 [2022-11-20 21:25:21,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666836677] [2022-11-20 21:25:21,584 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 21:25:21,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 21:25:21,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:25:21,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 21:25:21,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-11-20 21:25:21,586 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 18 states have internal predecessors, (50), 2 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 21:25:23,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:25:23,222 INFO L93 Difference]: Finished difference Result 176 states and 190 transitions. [2022-11-20 21:25:23,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 21:25:23,223 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 18 states have internal predecessors, (50), 2 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2022-11-20 21:25:23,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:25:23,224 INFO L225 Difference]: With dead ends: 176 [2022-11-20 21:25:23,224 INFO L226 Difference]: Without dead ends: 176 [2022-11-20 21:25:23,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 230 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=195, Invalid=995, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 21:25:23,226 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 409 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:25:23,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 528 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 521 Invalid, 0 Unknown, 190 Unchecked, 1.0s Time] [2022-11-20 21:25:23,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-11-20 21:25:23,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 107. [2022-11-20 21:25:23,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 75 states have (on average 1.5466666666666666) internal successors, (116), 99 states have internal predecessors, (116), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-20 21:25:23,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 125 transitions. [2022-11-20 21:25:23,233 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 125 transitions. Word has length 43 [2022-11-20 21:25:23,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:25:23,234 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 125 transitions. [2022-11-20 21:25:23,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 18 states have internal predecessors, (50), 2 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 21:25:23,234 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 125 transitions. [2022-11-20 21:25:23,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 21:25:23,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:25:23,236 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:25:23,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-20 21:25:23,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-20 21:25:23,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-20 21:25:23,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:25:23,844 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-20 21:25:23,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:25:23,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1717169729, now seen corresponding path program 1 times [2022-11-20 21:25:23,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:25:23,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [504194] [2022-11-20 21:25:23,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:23,845 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:25:23,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:25:23,846 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:25:23,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:25:24,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:25:24,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-20 21:25:24,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:24,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 21:25:24,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 21:25:24,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 21:25:24,543 INFO L321 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2022-11-20 21:25:24,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2022-11-20 21:25:24,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-20 21:25:24,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:25:24,728 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:25:24,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:25:25,528 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:25:25,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [504194] [2022-11-20 21:25:25,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [504194] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:25:25,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1595921861] [2022-11-20 21:25:25,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:25,529 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:25:25,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:25:25,532 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:25:25,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-20 21:25:26,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:25:26,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 21:25:26,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:26,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 21:25:26,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 21:25:26,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 21:25:26,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 21:25:26,726 INFO L321 Elim1Store]: treesize reduction 6, result has 62.5 percent of original size [2022-11-20 21:25:26,726 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 19 treesize of output 19 [2022-11-20 21:25:26,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-20 21:25:26,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 [2022-11-20 21:25:26,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:25:26,936 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:25:26,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:25:27,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1595921861] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:25:27,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177826713] [2022-11-20 21:25:27,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:27,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:25:27,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:25:27,772 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:25:27,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 21:25:27,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:25:27,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-20 21:25:27,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:28,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 21:25:28,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 21:25:28,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 21:25:28,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 21:25:28,345 INFO L321 Elim1Store]: treesize reduction 6, result has 62.5 percent of original size [2022-11-20 21:25:28,346 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 19 treesize of output 19 [2022-11-20 21:25:28,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-20 21:25:28,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 [2022-11-20 21:25:28,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:25:28,437 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:25:28,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:25:31,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177826713] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:25:31,281 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:25:31,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-11-20 21:25:31,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305454199] [2022-11-20 21:25:31,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:25:31,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 21:25:31,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:25:31,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 21:25:31,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-11-20 21:25:31,283 INFO L87 Difference]: Start difference. First operand 107 states and 125 transitions. Second operand has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-20 21:25:35,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:25:35,121 INFO L93 Difference]: Finished difference Result 198 states and 210 transitions. [2022-11-20 21:25:35,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 21:25:35,122 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2022-11-20 21:25:35,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:25:35,124 INFO L225 Difference]: With dead ends: 198 [2022-11-20 21:25:35,124 INFO L226 Difference]: Without dead ends: 198 [2022-11-20 21:25:35,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=282, Invalid=1524, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 21:25:35,125 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 432 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 302 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:25:35,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 607 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 900 Invalid, 0 Unknown, 302 Unchecked, 2.1s Time] [2022-11-20 21:25:35,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-20 21:25:35,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 109. [2022-11-20 21:25:35,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 77 states have (on average 1.5194805194805194) internal successors, (117), 101 states have internal predecessors, (117), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 21:25:35,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 125 transitions. [2022-11-20 21:25:35,137 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 125 transitions. Word has length 43 [2022-11-20 21:25:35,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:25:35,137 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 125 transitions. [2022-11-20 21:25:35,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-20 21:25:35,138 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 125 transitions. [2022-11-20 21:25:35,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 21:25:35,139 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:25:35,139 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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] [2022-11-20 21:25:35,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-11-20 21:25:35,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:25:35,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 21:25:35,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:25:35,744 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-20 21:25:35,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:25:35,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1150420657, now seen corresponding path program 1 times [2022-11-20 21:25:35,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:25:35,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2100733201] [2022-11-20 21:25:35,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:35,745 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:25:35,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:25:35,746 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:25:35,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 21:25:35,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:25:35,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:25:35,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:36,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 21:25:36,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 8 [2022-11-20 21:25:36,220 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:25:36,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:25:36,559 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:25:36,559 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:25:36,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2100733201] [2022-11-20 21:25:36,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2100733201] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:25:36,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [117467186] [2022-11-20 21:25:36,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:36,560 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:25:36,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:25:36,561 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:25:36,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-20 21:25:36,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:25:36,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 21:25:36,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:36,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 21:25:37,066 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 21:25:37,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:25:37,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [117467186] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:25:37,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:25:37,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12, 11] total 20 [2022-11-20 21:25:37,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415412030] [2022-11-20 21:25:37,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:25:37,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:25:37,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:25:37,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:25:37,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2022-11-20 21:25:37,068 INFO L87 Difference]: Start difference. First operand 109 states and 125 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 21:25:37,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:25:37,484 INFO L93 Difference]: Finished difference Result 172 states and 185 transitions. [2022-11-20 21:25:37,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:25:37,485 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2022-11-20 21:25:37,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:25:37,486 INFO L225 Difference]: With dead ends: 172 [2022-11-20 21:25:37,486 INFO L226 Difference]: Without dead ends: 172 [2022-11-20 21:25:37,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-11-20 21:25:37,487 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 168 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:25:37,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 150 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 21:25:37,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-20 21:25:37,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 114. [2022-11-20 21:25:37,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 82 states have (on average 1.5365853658536586) internal successors, (126), 106 states have internal predecessors, (126), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 21:25:37,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 134 transitions. [2022-11-20 21:25:37,492 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 134 transitions. Word has length 46 [2022-11-20 21:25:37,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:25:37,493 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 134 transitions. [2022-11-20 21:25:37,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 21:25:37,493 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 134 transitions. [2022-11-20 21:25:37,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 21:25:37,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:25:37,494 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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] [2022-11-20 21:25:37,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-11-20 21:25:37,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-11-20 21:25:37,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 21:25:37,895 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-20 21:25:37,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:25:37,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1150420658, now seen corresponding path program 1 times [2022-11-20 21:25:37,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:25:37,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1137265080] [2022-11-20 21:25:37,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:37,896 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:25:37,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:25:37,896 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:25:37,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-20 21:25:38,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:25:38,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:25:38,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:38,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 21:25:38,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 8 [2022-11-20 21:25:38,354 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:25:38,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:25:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:25:38,696 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:25:38,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1137265080] [2022-11-20 21:25:38,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1137265080] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:25:38,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2016143615] [2022-11-20 21:25:38,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:38,696 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:25:38,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:25:38,701 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:25:38,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-20 21:25:39,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:25:39,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:25:39,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:39,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 21:25:39,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 8 [2022-11-20 21:25:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:25:39,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:25:39,388 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:25:39,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2016143615] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:25:39,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107454053] [2022-11-20 21:25:39,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:25:39,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:25:39,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:25:39,390 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:25:39,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 21:25:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:25:39,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 21:25:39,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:39,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 21:25:39,797 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 21:25:39,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:25:39,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107454053] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:25:39,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-20 21:25:39,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12, 11, 12, 11] total 20 [2022-11-20 21:25:39,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018885663] [2022-11-20 21:25:39,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:25:39,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:25:39,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:25:39,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:25:39,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2022-11-20 21:25:39,800 INFO L87 Difference]: Start difference. First operand 114 states and 134 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 21:25:40,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:25:40,292 INFO L93 Difference]: Finished difference Result 202 states and 218 transitions. [2022-11-20 21:25:40,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:25:40,293 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2022-11-20 21:25:40,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:25:40,294 INFO L225 Difference]: With dead ends: 202 [2022-11-20 21:25:40,294 INFO L226 Difference]: Without dead ends: 202 [2022-11-20 21:25:40,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-11-20 21:25:40,295 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 202 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:25:40,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 173 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 21:25:40,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-11-20 21:25:40,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 117. [2022-11-20 21:25:40,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 85 states have (on average 1.5176470588235293) internal successors, (129), 109 states have internal predecessors, (129), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 21:25:40,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 137 transitions. [2022-11-20 21:25:40,300 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 137 transitions. Word has length 46 [2022-11-20 21:25:40,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:25:40,301 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 137 transitions. [2022-11-20 21:25:40,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 21:25:40,301 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 137 transitions. [2022-11-20 21:25:40,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 21:25:40,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:25:40,302 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 21:25:40,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-20 21:25:40,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-20 21:25:40,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 21:25:40,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:25:40,923 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-20 21:25:40,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:25:40,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1152050001, now seen corresponding path program 2 times [2022-11-20 21:25:40,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:25:40,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2075056017] [2022-11-20 21:25:40,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:25:40,924 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:25:40,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:25:40,925 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:25:40,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-20 21:25:41,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 21:25:41,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:25:41,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-20 21:25:41,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:41,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 21:25:41,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 21:25:41,533 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-20 21:25:41,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 39 [2022-11-20 21:25:41,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 21:25:41,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-20 21:25:42,086 INFO L321 Elim1Store]: treesize reduction 80, result has 37.0 percent of original size [2022-11-20 21:25:42,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 67 [2022-11-20 21:25:42,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-11-20 21:25:42,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:25:42,640 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 21:25:42,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 33 [2022-11-20 21:25:42,854 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:25:42,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:25:43,538 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:25:43,538 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-11-20 21:25:43,861 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:25:43,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2075056017] [2022-11-20 21:25:43,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2075056017] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:25:43,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1478741721] [2022-11-20 21:25:43,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:25:43,862 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:25:43,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:25:43,863 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:25:43,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-20 21:25:44,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 21:25:44,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:25:44,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-20 21:25:44,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:44,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 21:25:44,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 21:25:44,510 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-20 21:25:44,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 39 [2022-11-20 21:25:44,739 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-20 21:25:44,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 21:25:44,926 INFO L321 Elim1Store]: treesize reduction 80, result has 37.0 percent of original size [2022-11-20 21:25:44,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 67 [2022-11-20 21:25:44,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-11-20 21:25:45,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:25:45,256 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 21:25:45,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 33 [2022-11-20 21:25:45,393 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:25:45,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:25:45,770 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:25:45,770 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-11-20 21:25:46,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1478741721] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:25:46,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555953840] [2022-11-20 21:25:46,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:25:46,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:25:46,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:25:46,240 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:25:46,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 21:25:46,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 21:25:46,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:25:46,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-20 21:25:46,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:46,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 21:25:46,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 21:25:46,660 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-20 21:25:46,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 39 [2022-11-20 21:25:46,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 21:25:46,909 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-20 21:25:47,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:47,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2022-11-20 21:25:47,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:47,071 INFO L321 Elim1Store]: treesize reduction 52, result has 38.1 percent of original size [2022-11-20 21:25:47,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 65 [2022-11-20 21:25:47,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 21:25:47,373 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 21:25:47,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 33 [2022-11-20 21:25:47,506 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 35 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:25:47,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:25:47,871 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:25:47,872 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-11-20 21:25:49,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555953840] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:25:49,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:25:49,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 21 [2022-11-20 21:25:49,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040022525] [2022-11-20 21:25:49,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:25:49,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 21:25:49,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:25:49,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 21:25:49,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=719, Unknown=6, NotChecked=0, Total=812 [2022-11-20 21:25:49,325 INFO L87 Difference]: Start difference. First operand 117 states and 137 transitions. Second operand has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-20 21:25:50,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:25:50,539 INFO L93 Difference]: Finished difference Result 133 states and 156 transitions. [2022-11-20 21:25:50,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 21:25:50,540 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 46 [2022-11-20 21:25:50,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:25:50,541 INFO L225 Difference]: With dead ends: 133 [2022-11-20 21:25:50,541 INFO L226 Difference]: Without dead ends: 133 [2022-11-20 21:25:50,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 132 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=171, Invalid=1222, Unknown=13, NotChecked=0, Total=1406 [2022-11-20 21:25:50,542 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 25 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 238 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:25:50,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 380 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 181 Invalid, 0 Unknown, 238 Unchecked, 0.5s Time] [2022-11-20 21:25:50,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-20 21:25:50,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 120. [2022-11-20 21:25:50,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 88 states have (on average 1.5227272727272727) internal successors, (134), 112 states have internal predecessors, (134), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 21:25:50,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 142 transitions. [2022-11-20 21:25:50,548 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 142 transitions. Word has length 46 [2022-11-20 21:25:50,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:25:50,548 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 142 transitions. [2022-11-20 21:25:50,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-20 21:25:50,549 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 142 transitions. [2022-11-20 21:25:50,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 21:25:50,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:25:50,550 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 21:25:50,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-20 21:25:50,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-20 21:25:50,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-11-20 21:25:51,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 21:25:51,158 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-20 21:25:51,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:25:51,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1152050002, now seen corresponding path program 2 times [2022-11-20 21:25:51,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:25:51,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [471008116] [2022-11-20 21:25:51,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:25:51,159 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:25:51,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:25:51,161 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:25:51,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-20 21:25:51,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 21:25:51,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:25:51,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-20 21:25:51,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:25:51,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 21:25:51,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 21:25:51,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 21:25:51,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 21:25:52,094 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-20 21:25:52,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 30 [2022-11-20 21:25:52,136 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-20 21:25:52,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 39 [2022-11-20 21:25:52,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-20 21:25:52,541 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-20 21:25:52,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:52,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 59 [2022-11-20 21:25:52,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:52,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-20 21:25:52,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:25:52,841 INFO L321 Elim1Store]: treesize reduction 6, result has 78.6 percent of original size [2022-11-20 21:25:52,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2022-11-20 21:25:52,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-20 21:25:53,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:25:53,554 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 21:25:53,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 50 [2022-11-20 21:25:53,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 15 [2022-11-20 21:25:53,806 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:25:53,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:25:55,432 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:25:55,432 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 70 [2022-11-20 21:25:55,449 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:25:55,449 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 61 [2022-11-20 21:25:55,461 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 6 treesize of output 4 [2022-11-20 21:26:09,385 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:26:09,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [471008116] [2022-11-20 21:26:09,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [471008116] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:26:09,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [483508644] [2022-11-20 21:26:09,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:26:09,386 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:26:09,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:26:09,387 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:26:09,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-20 21:26:10,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 21:26:10,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:26:10,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-20 21:26:10,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:26:10,069 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 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 21:26:10,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 21:26:11,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 21:26:11,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 21:26:12,529 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-20 21:26:12,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 39 [2022-11-20 21:26:12,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-20 21:26:15,587 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-20 21:26:15,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-20 21:26:18,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:26:18,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2022-11-20 21:26:18,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:26:18,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-20 21:26:18,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:26:18,390 INFO L321 Elim1Store]: treesize reduction 6, result has 70.0 percent of original size [2022-11-20 21:26:18,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 28 [2022-11-20 21:26:18,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-20 21:26:23,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:26:23,520 INFO L321 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-11-20 21:26:23,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 47 [2022-11-20 21:26:23,664 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 21:26:23,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2022-11-20 21:26:25,383 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:26:25,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:26:27,887 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:26:27,887 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 70 [2022-11-20 21:26:27,964 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:26:27,965 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 61 [2022-11-20 21:26:28,182 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 6 treesize of output 4 [2022-11-20 21:26:40,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [483508644] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:26:40,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7201231] [2022-11-20 21:26:40,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 21:26:40,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:26:40,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:26:40,697 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:26:40,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-20 21:26:41,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 21:26:41,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:26:41,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-20 21:26:41,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:26:41,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 21:26:41,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 21:26:42,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 21:26:42,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 21:26:43,432 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-11-20 21:26:43,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 30 [2022-11-20 21:26:43,850 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-20 21:26:43,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 39 [2022-11-20 21:26:45,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-20 21:26:45,453 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-20 21:26:46,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:26:46,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 59 [2022-11-20 21:26:46,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:26:46,576 INFO L321 Elim1Store]: treesize reduction 6, result has 76.9 percent of original size [2022-11-20 21:26:46,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2022-11-20 21:26:46,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-20 21:26:46,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:26:46,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-20 21:26:48,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 21:26:49,063 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-20 21:26:49,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 50 [2022-11-20 21:26:49,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 15 [2022-11-20 21:26:49,444 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 21:26:49,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:26:52,063 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:26:52,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 70 [2022-11-20 21:26:52,127 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:26:52,127 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 61 [2022-11-20 21:26:52,294 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 6 treesize of output 4 [2022-11-20 21:27:00,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7201231] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:27:00,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:27:00,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2022-11-20 21:27:00,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678752861] [2022-11-20 21:27:00,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:27:00,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-20 21:27:00,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:27:00,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-20 21:27:00,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1284, Unknown=20, NotChecked=0, Total=1406 [2022-11-20 21:27:00,688 INFO L87 Difference]: Start difference. First operand 120 states and 142 transitions. Second operand has 30 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 26 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-20 21:27:22,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:27:22,353 INFO L93 Difference]: Finished difference Result 128 states and 149 transitions. [2022-11-20 21:27:22,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 21:27:22,354 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 26 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 46 [2022-11-20 21:27:22,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:27:22,355 INFO L225 Difference]: With dead ends: 128 [2022-11-20 21:27:22,356 INFO L226 Difference]: Without dead ends: 128 [2022-11-20 21:27:22,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 127 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 60.9s TimeCoverageRelationStatistics Valid=210, Invalid=2300, Unknown=40, NotChecked=0, Total=2550 [2022-11-20 21:27:22,357 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 20 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 475 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:27:22,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1021 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 424 Invalid, 0 Unknown, 475 Unchecked, 7.0s Time] [2022-11-20 21:27:22,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-20 21:27:22,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2022-11-20 21:27:22,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 88 states have (on average 1.5113636363636365) internal successors, (133), 112 states have internal predecessors, (133), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 21:27:22,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 141 transitions. [2022-11-20 21:27:22,363 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 141 transitions. Word has length 46 [2022-11-20 21:27:22,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:27:22,364 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 141 transitions. [2022-11-20 21:27:22,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 26 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-20 21:27:22,364 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 141 transitions. [2022-11-20 21:27:22,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-20 21:27:22,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:27:22,366 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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] [2022-11-20 21:27:22,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-20 21:27:22,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-20 21:27:22,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-20 21:27:22,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 21:27:22,975 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-20 21:27:22,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:27:22,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1651374405, now seen corresponding path program 1 times [2022-11-20 21:27:22,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:27:22,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983690413] [2022-11-20 21:27:22,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:27:22,976 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:27:22,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:27:22,977 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:27:22,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-20 21:27:23,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:27:23,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-20 21:27:23,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:27:24,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 21:27:25,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 8 [2022-11-20 21:27:26,301 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:27:26,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:27:30,318 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 21:27:30,318 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:27:30,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983690413] [2022-11-20 21:27:30,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983690413] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:27:30,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1494945198] [2022-11-20 21:27:30,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:27:30,319 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:27:30,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:27:30,320 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:27:30,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-20 21:27:30,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:27:30,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 21:27:30,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:27:32,066 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 21:27:32,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:27:32,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1494945198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:27:32,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:27:32,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12, 11] total 19 [2022-11-20 21:27:32,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074166799] [2022-11-20 21:27:32,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:27:32,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:27:32,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:27:32,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:27:32,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-11-20 21:27:32,069 INFO L87 Difference]: Start difference. First operand 120 states and 141 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 21:27:34,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:27:34,792 INFO L93 Difference]: Finished difference Result 205 states and 221 transitions. [2022-11-20 21:27:34,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 21:27:34,793 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2022-11-20 21:27:34,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:27:34,794 INFO L225 Difference]: With dead ends: 205 [2022-11-20 21:27:34,794 INFO L226 Difference]: Without dead ends: 205 [2022-11-20 21:27:34,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-11-20 21:27:34,796 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 208 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:27:34,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 325 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-20 21:27:34,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-11-20 21:27:34,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 120. [2022-11-20 21:27:34,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 88 states have (on average 1.5) internal successors, (132), 112 states have internal predecessors, (132), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 21:27:34,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 140 transitions. [2022-11-20 21:27:34,801 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 140 transitions. Word has length 49 [2022-11-20 21:27:34,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:27:34,802 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 140 transitions. [2022-11-20 21:27:34,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 21:27:34,802 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 140 transitions. [2022-11-20 21:27:34,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-20 21:27:34,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:27:34,803 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:27:34,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2022-11-20 21:27:35,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-20 21:27:35,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:27:35,208 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-20 21:27:35,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:27:35,208 INFO L85 PathProgramCache]: Analyzing trace with hash -362068770, now seen corresponding path program 3 times [2022-11-20 21:27:35,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:27:35,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1384964365] [2022-11-20 21:27:35,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:27:35,209 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:27:35,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:27:35,210 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:27:35,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-20 21:27:35,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 21:27:35,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:27:35,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-20 21:27:35,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:27:35,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 21:27:37,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 21:27:38,370 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-20 21:27:38,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 39 [2022-11-20 21:27:40,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-20 21:27:41,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 21:27:43,310 INFO L321 Elim1Store]: treesize reduction 80, result has 37.0 percent of original size [2022-11-20 21:27:43,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 67 [2022-11-20 21:27:43,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2022-11-20 21:27:47,018 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-20 21:27:47,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-20 21:27:49,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:27:49,197 INFO L217 Elim1Store]: Index analysis took 105 ms [2022-11-20 21:27:49,996 INFO L321 Elim1Store]: treesize reduction 138, result has 37.3 percent of original size [2022-11-20 21:27:49,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 107 [2022-11-20 21:27:50,204 INFO L321 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2022-11-20 21:27:50,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 113 treesize of output 73 [2022-11-20 21:27:50,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:27:50,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-20 21:27:55,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:27:55,813 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 21:27:55,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 31 [2022-11-20 21:27:58,552 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-11-20 21:27:58,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 121 treesize of output 55 [2022-11-20 21:28:00,928 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:28:00,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:28:09,199 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:28:09,200 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 47 [2022-11-20 21:28:09,267 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:28:09,267 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 44 [2022-11-20 21:28:09,505 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_~head~0.base_263 (_ BitVec 32)) (v_arrayElimArr_22 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_23 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (store |c_#valid| v_~head~0.base_263 (_ bv1 1)))) (or (= (_ bv0 1) (bvadd (select .cse0 (let ((.cse2 (bvadd c_~head~0.offset (_ bv4 32)))) (select (let ((.cse1 (store |c_#memory_$Pointer$.base| v_~head~0.base_263 v_arrayElimArr_22))) (select .cse1 (select (select .cse1 c_~head~0.base) .cse2))) (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| v_~head~0.base_263 v_arrayElimArr_23) c_~head~0.base) .cse2))))) (_ bv1 1))) (not (= (_ bv0 1) (select |c_#valid| v_~head~0.base_263))) (not (= c_~head~0.base (select v_arrayElimArr_22 (_ bv4 32)))) (not (= c_~head~0.offset (select v_arrayElimArr_23 (_ bv4 32)))) (not (= (_ bv0 1) (bvadd (select .cse0 c_~head~0.base) (_ bv1 1))))))) is different from false [2022-11-20 21:28:09,522 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 21:28:09,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1384964365] [2022-11-20 21:28:09,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1384964365] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:28:09,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [863230080] [2022-11-20 21:28:09,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:28:09,522 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 21:28:09,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 21:28:09,524 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 21:28:09,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-20 21:28:10,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 21:28:10,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:28:10,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-20 21:28:10,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:28:10,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 21:28:10,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 21:28:11,727 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-20 21:28:11,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 39 [2022-11-20 21:28:13,833 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-20 21:28:14,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 21:28:14,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:28:14,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2022-11-20 21:28:14,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:28:15,289 INFO L321 Elim1Store]: treesize reduction 76, result has 38.7 percent of original size [2022-11-20 21:28:15,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 81 [2022-11-20 21:28:18,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-20 21:28:18,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-20 21:28:19,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:28:19,586 INFO L217 Elim1Store]: Index analysis took 108 ms [2022-11-20 21:28:20,399 INFO L321 Elim1Store]: treesize reduction 138, result has 37.3 percent of original size [2022-11-20 21:28:20,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 107 [2022-11-20 21:28:20,594 INFO L321 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2022-11-20 21:28:20,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 113 treesize of output 73 [2022-11-20 21:28:20,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:28:20,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-20 21:28:24,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:28:24,234 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 21:28:24,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 31 [2022-11-20 21:28:25,770 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-11-20 21:28:25,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 121 treesize of output 55 [2022-11-20 21:28:27,351 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:28:27,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:28:33,362 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:28:33,362 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 47 [2022-11-20 21:28:33,446 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:28:33,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 44 [2022-11-20 21:28:33,656 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_~head~0.base_269 (_ BitVec 32)) (v_arrayElimArr_27 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_28 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (bvadd (select (store |c_#valid| v_~head~0.base_269 (_ bv1 1)) (let ((.cse1 (bvadd c_~head~0.offset (_ bv4 32)))) (select (let ((.cse0 (store |c_#memory_$Pointer$.base| v_~head~0.base_269 v_arrayElimArr_27))) (select .cse0 (select (select .cse0 c_~head~0.base) .cse1))) (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| v_~head~0.base_269 v_arrayElimArr_28) c_~head~0.base) .cse1))))) (_ bv1 1)) (_ bv0 1)) (not (= (select v_arrayElimArr_27 (_ bv4 32)) c_~head~0.base)) (not (= (_ bv0 1) (select |c_#valid| v_~head~0.base_269))) (not (= c_~head~0.offset (select v_arrayElimArr_28 (_ bv4 32)))))) is different from false [2022-11-20 21:28:33,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [863230080] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:28:33,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544464261] [2022-11-20 21:28:33,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:28:33,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:28:33,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:28:33,676 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:28:33,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-20 21:28:35,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 21:28:35,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:28:35,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-20 21:28:35,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:28:35,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 21:28:36,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 21:28:37,568 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-20 21:28:37,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 39 [2022-11-20 21:28:38,972 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-20 21:28:39,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 21:28:39,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:28:39,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2022-11-20 21:28:40,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:28:40,361 INFO L321 Elim1Store]: treesize reduction 76, result has 38.7 percent of original size [2022-11-20 21:28:40,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 81 [2022-11-20 21:28:43,074 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-20 21:28:43,165 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-20 21:28:45,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:28:45,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-20 21:28:45,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:28:46,070 INFO L321 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2022-11-20 21:28:46,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 85 treesize of output 61 [2022-11-20 21:28:46,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:28:46,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:28:46,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:28:46,604 INFO L321 Elim1Store]: treesize reduction 64, result has 38.5 percent of original size [2022-11-20 21:28:46,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 95 [2022-11-20 21:28:53,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:28:53,173 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 21:28:53,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 31 [2022-11-20 21:28:56,268 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-11-20 21:28:56,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 121 treesize of output 55 [2022-11-20 21:28:58,859 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:28:58,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:29:01,145 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:29:01,146 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 47 [2022-11-20 21:29:01,209 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 21:29:01,209 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 44 [2022-11-20 21:29:01,374 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2893 (_ BitVec 1)) (v_~head~0.base_275 (_ BitVec 32)) (v_arrayElimArr_32 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_33 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (bvadd (select (store |c_#valid| v_~head~0.base_275 v_ArrVal_2893) (let ((.cse1 (bvadd c_~head~0.offset (_ bv4 32)))) (select (let ((.cse0 (store |c_#memory_$Pointer$.base| v_~head~0.base_275 v_arrayElimArr_32))) (select .cse0 (select (select .cse0 c_~head~0.base) .cse1))) (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| v_~head~0.base_275 v_arrayElimArr_33) c_~head~0.base) .cse1))))) (_ bv1 1)) (_ bv0 1)) (not (= c_~head~0.offset (select v_arrayElimArr_33 (_ bv4 32)))) (not (= c_~head~0.base (select v_arrayElimArr_32 (_ bv4 32)))) (not (= (select |c_#valid| v_~head~0.base_275) (_ bv0 1))))) is different from false [2022-11-20 21:29:01,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544464261] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:29:01,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:29:01,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 28] total 40 [2022-11-20 21:29:01,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980581958] [2022-11-20 21:29:01,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:29:01,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-20 21:29:01,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 21:29:01,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-20 21:29:01,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2537, Unknown=12, NotChecked=312, Total=3080 [2022-11-20 21:29:01,393 INFO L87 Difference]: Start difference. First operand 120 states and 140 transitions. Second operand has 41 states, 40 states have (on average 1.575) internal successors, (63), 36 states have internal predecessors, (63), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-20 21:29:22,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:29:22,789 INFO L93 Difference]: Finished difference Result 131 states and 153 transitions. [2022-11-20 21:29:22,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-20 21:29:22,789 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.575) internal successors, (63), 36 states have internal predecessors, (63), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 49 [2022-11-20 21:29:22,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:29:22,791 INFO L225 Difference]: With dead ends: 131 [2022-11-20 21:29:22,791 INFO L226 Difference]: Without dead ends: 131 [2022-11-20 21:29:22,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 116 SyntacticMatches, 15 SemanticMatches, 68 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 52.8s TimeCoverageRelationStatistics Valid=389, Invalid=4009, Unknown=36, NotChecked=396, Total=4830 [2022-11-20 21:29:22,794 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 34 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1011 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 690 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:29:22,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 1011 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 440 Invalid, 0 Unknown, 690 Unchecked, 7.2s Time] [2022-11-20 21:29:22,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-20 21:29:22,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 123. [2022-11-20 21:29:22,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 91 states have (on average 1.5054945054945055) internal successors, (137), 115 states have internal predecessors, (137), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 21:29:22,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 145 transitions. [2022-11-20 21:29:22,799 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 145 transitions. Word has length 49 [2022-11-20 21:29:22,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:29:22,800 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 145 transitions. [2022-11-20 21:29:22,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.575) internal successors, (63), 36 states have internal predecessors, (63), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-20 21:29:22,800 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 145 transitions. [2022-11-20 21:29:22,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-20 21:29:22,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:29:22,801 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:29:22,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-20 21:29:23,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-20 21:29:23,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-20 21:29:23,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:29:23,416 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [insert_listErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, insert_listErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-20 21:29:23,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:29:23,417 INFO L85 PathProgramCache]: Analyzing trace with hash -362068769, now seen corresponding path program 3 times [2022-11-20 21:29:23,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 21:29:23,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190410766] [2022-11-20 21:29:23,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 21:29:23,417 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 21:29:23,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 21:29:23,418 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-20 21:29:23,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0e35a72-1a50-46e8-924f-1f178be91047/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-20 21:29:23,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 21:29:23,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 21:29:23,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-20 21:29:23,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:29:23,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 21:29:24,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-20 21:29:26,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 21:29:26,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 21:29:27,922 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-20 21:29:27,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 39 [2022-11-20 21:29:28,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-20 21:29:31,005 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-20 21:29:31,127 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-20 21:29:32,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:29:32,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 59 [2022-11-20 21:29:32,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:29:32,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:29:32,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2022-11-20 21:29:33,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:29:33,200 INFO L321 Elim1Store]: treesize reduction 6, result has 76.9 percent of original size [2022-11-20 21:29:33,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2022-11-20 21:29:33,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:29:33,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-20 21:29:35,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-20 21:29:36,145 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-20 21:29:37,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:29:38,005 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-20 21:29:38,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 136 treesize of output 110 [2022-11-20 21:29:38,138 INFO L321 Elim1Store]: treesize reduction 6, result has 62.5 percent of original size [2022-11-20 21:29:38,138 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 19 treesize of output 19 [2022-11-20 21:29:38,526 INFO L321 Elim1Store]: treesize reduction 55, result has 34.5 percent of original size [2022-11-20 21:29:38,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 120 treesize of output 107 [2022-11-20 21:29:38,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 21:29:39,029 INFO L321 Elim1Store]: treesize reduction 100, result has 25.9 percent of original size [2022-11-20 21:29:39,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 60 [2022-11-20 21:29:39,095 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 72 treesize of output 30 [2022-11-20 21:29:39,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 3 [2022-11-20 21:29:55,770 INFO L321 Elim1Store]: treesize reduction 194, result has 47.1 percent of original size [2022-11-20 21:29:55,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 28 case distinctions, treesize of input 344 treesize of output 334 [2022-11-20 21:29:56,443 INFO L217 Elim1Store]: Index analysis took 619 ms [2022-11-20 21:30:03,052 WARN L233 SmtUtils]: Spent 6.60s on a formula simplification. DAG size of input: 169 DAG size of output: 114 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-20 21:30:03,053 INFO L321 Elim1Store]: treesize reduction 196, result has 52.1 percent of original size [2022-11-20 21:30:03,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 13 new quantified variables, introduced 36 case distinctions, treesize of input 290 treesize of output 424