./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test18_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test18_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 27e059eb1633b1ab9c045484375455e2667fa3360a55d0bc53eccfa53fe7600f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 06:05:08,522 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:05:08,523 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:05:08,536 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:05:08,536 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:05:08,537 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:05:08,538 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:05:08,539 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:05:08,540 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:05:08,541 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:05:08,541 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:05:08,542 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:05:08,542 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:05:08,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:05:08,544 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:05:08,544 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:05:08,545 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:05:08,545 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:05:08,546 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:05:08,547 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:05:08,548 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:05:08,549 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:05:08,550 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:05:08,551 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:05:08,553 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:05:08,553 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:05:08,553 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:05:08,553 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:05:08,554 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:05:08,554 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:05:08,554 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:05:08,555 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:05:08,555 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:05:08,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:05:08,556 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:05:08,557 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:05:08,557 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:05:08,557 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:05:08,557 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:05:08,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:05:08,558 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:05:08,559 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 06:05:08,574 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:05:08,574 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:05:08,574 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:05:08,574 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:05:08,574 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:05:08,575 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:05:08,575 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:05:08,575 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:05:08,575 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:05:08,575 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:05:08,575 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:05:08,575 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:05:08,576 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:05:08,576 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:05:08,576 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:05:08,576 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:05:08,576 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:05:08,576 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:05:08,577 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 06:05:08,577 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 06:05:08,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:05:08,577 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:05:08,577 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 06:05:08,577 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:05:08,578 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:05:08,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:05:08,578 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 06:05:08,578 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 06:05:08,578 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 06:05:08,578 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:05:08,578 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 06:05:08,579 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:05:08,579 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:05:08,579 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:05:08,579 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:05:08,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:05:08,580 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:05:08,580 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:05:08,580 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:05:08,580 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:05:08,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:05:08,580 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:05:08,581 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_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 27e059eb1633b1ab9c045484375455e2667fa3360a55d0bc53eccfa53fe7600f [2022-12-14 06:05:08,740 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:05:08,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:05:08,757 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:05:08,758 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:05:08,759 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:05:08,759 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/ldv-memsafety/memleaks_test18_2.i [2022-12-14 06:05:11,326 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:05:11,514 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:05:11,514 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/sv-benchmarks/c/ldv-memsafety/memleaks_test18_2.i [2022-12-14 06:05:11,524 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/data/324a21201/7e7ff08e50454d5d9648dde0a03d0a75/FLAGc98db7139 [2022-12-14 06:05:11,879 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/data/324a21201/7e7ff08e50454d5d9648dde0a03d0a75 [2022-12-14 06:05:11,881 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:05:11,882 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:05:11,883 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:05:11,883 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:05:11,886 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:05:11,886 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:05:11" (1/1) ... [2022-12-14 06:05:11,888 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20931890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:05:11, skipping insertion in model container [2022-12-14 06:05:11,888 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:05:11" (1/1) ... [2022-12-14 06:05:11,894 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:05:11,920 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:05:12,141 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:05:12,154 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-12-14 06:05:12,154 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@a75d0d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:05:12, skipping insertion in model container [2022-12-14 06:05:12,154 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:05:12,155 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 06:05:12,156 INFO L158 Benchmark]: Toolchain (without parser) took 273.68ms. Allocated memory is still 144.7MB. Free memory was 112.2MB in the beginning and 98.6MB in the end (delta: 13.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-14 06:05:12,156 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 96.5MB. Free memory is still 45.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 06:05:12,157 INFO L158 Benchmark]: CACSL2BoogieTranslator took 272.05ms. Allocated memory is still 144.7MB. Free memory was 112.2MB in the beginning and 98.6MB in the end (delta: 13.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-12-14 06:05:12,157 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 96.5MB. Free memory is still 45.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 272.05ms. Allocated memory is still 144.7MB. Free memory was 112.2MB in the beginning and 98.6MB in the end (delta: 13.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test18_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 27e059eb1633b1ab9c045484375455e2667fa3360a55d0bc53eccfa53fe7600f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 06:05:13,523 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:05:13,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:05:13,541 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:05:13,541 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:05:13,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:05:13,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:05:13,544 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:05:13,545 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:05:13,546 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:05:13,546 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:05:13,547 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:05:13,548 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:05:13,548 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:05:13,549 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:05:13,550 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:05:13,550 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:05:13,551 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:05:13,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:05:13,553 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:05:13,555 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:05:13,556 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:05:13,557 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:05:13,558 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:05:13,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:05:13,563 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:05:13,563 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:05:13,564 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:05:13,565 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:05:13,566 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:05:13,566 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:05:13,566 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:05:13,567 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:05:13,568 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:05:13,569 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:05:13,569 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:05:13,570 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:05:13,570 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:05:13,570 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:05:13,571 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:05:13,572 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:05:13,573 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 06:05:13,597 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:05:13,597 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:05:13,597 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:05:13,597 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:05:13,598 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:05:13,598 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:05:13,598 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:05:13,599 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:05:13,599 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:05:13,599 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:05:13,599 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:05:13,599 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:05:13,600 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 06:05:13,600 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 06:05:13,600 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:05:13,600 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:05:13,600 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 06:05:13,601 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:05:13,601 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:05:13,601 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:05:13,601 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 06:05:13,601 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 06:05:13,601 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 06:05:13,601 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:05:13,601 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 06:05:13,601 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 06:05:13,602 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 06:05:13,602 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:05:13,602 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:05:13,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:05:13,602 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 06:05:13,602 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:05:13,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:05:13,602 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:05:13,603 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:05:13,603 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 06:05:13,603 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 06:05:13,603 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:05:13,603 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 06:05:13,603 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_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 27e059eb1633b1ab9c045484375455e2667fa3360a55d0bc53eccfa53fe7600f [2022-12-14 06:05:13,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:05:13,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:05:13,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:05:13,824 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:05:13,824 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:05:13,825 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/ldv-memsafety/memleaks_test18_2.i [2022-12-14 06:05:16,399 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:05:16,558 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:05:16,558 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/sv-benchmarks/c/ldv-memsafety/memleaks_test18_2.i [2022-12-14 06:05:16,568 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/data/d7747ac2f/9feadf1d9f88459ba8ce300427b04e9d/FLAG82e560a7d [2022-12-14 06:05:16,579 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/data/d7747ac2f/9feadf1d9f88459ba8ce300427b04e9d [2022-12-14 06:05:16,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:05:16,581 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:05:16,582 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:05:16,582 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:05:16,585 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:05:16,586 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:05:16" (1/1) ... [2022-12-14 06:05:16,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33a72bd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:05:16, skipping insertion in model container [2022-12-14 06:05:16,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:05:16" (1/1) ... [2022-12-14 06:05:16,591 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:05:16,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:05:16,899 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:05:16,916 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 06:05:16,925 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:05:16,971 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:05:16,978 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:05:17,023 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:05:17,053 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:05:17,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:05:17 WrapperNode [2022-12-14 06:05:17,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:05:17,054 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:05:17,054 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:05:17,054 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:05:17,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:05:17" (1/1) ... [2022-12-14 06:05:17,079 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:05:17" (1/1) ... [2022-12-14 06:05:17,097 INFO L138 Inliner]: procedures = 165, calls = 73, calls flagged for inlining = 21, calls inlined = 3, statements flattened = 54 [2022-12-14 06:05:17,097 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:05:17,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:05:17,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:05:17,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:05:17,104 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:05:17" (1/1) ... [2022-12-14 06:05:17,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:05:17" (1/1) ... [2022-12-14 06:05:17,107 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:05:17" (1/1) ... [2022-12-14 06:05:17,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:05:17" (1/1) ... [2022-12-14 06:05:17,115 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:05:17" (1/1) ... [2022-12-14 06:05:17,117 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:05:17" (1/1) ... [2022-12-14 06:05:17,119 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:05:17" (1/1) ... [2022-12-14 06:05:17,120 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:05:17" (1/1) ... [2022-12-14 06:05:17,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:05:17,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:05:17,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:05:17,123 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:05:17,124 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:05:17" (1/1) ... [2022-12-14 06:05:17,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:05:17,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:05:17,144 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:05:17,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:05:17,175 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-12-14 06:05:17,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-12-14 06:05:17,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 06:05:17,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:05:17,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 06:05:17,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 06:05:17,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 06:05:17,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 06:05:17,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:05:17,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:05:17,274 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:05:17,275 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:05:17,440 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:05:17,444 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:05:17,444 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 06:05:17,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:05:17 BoogieIcfgContainer [2022-12-14 06:05:17,446 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:05:17,447 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:05:17,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:05:17,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:05:17,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:05:16" (1/3) ... [2022-12-14 06:05:17,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46bf5b38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:05:17, skipping insertion in model container [2022-12-14 06:05:17,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:05:17" (2/3) ... [2022-12-14 06:05:17,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46bf5b38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:05:17, skipping insertion in model container [2022-12-14 06:05:17,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:05:17" (3/3) ... [2022-12-14 06:05:17,451 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test18_2.i [2022-12-14 06:05:17,464 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:05:17,464 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2022-12-14 06:05:17,493 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:05:17,497 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;@ee366f6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:05:17,497 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-12-14 06:05:17,500 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.72) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 06:05:17,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 06:05:17,505 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:05:17,506 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:05:17,506 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:05:17,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:05:17,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1121226903, now seen corresponding path program 1 times [2022-12-14 06:05:17,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:05:17,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1395858697] [2022-12-14 06:05:17,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:17,519 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:05:17,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:05:17,521 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:05:17,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-14 06:05:17,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:17,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 06:05:17,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:05:17,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:05:17,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:05:17,635 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:05:17,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1395858697] [2022-12-14 06:05:17,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1395858697] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:05:17,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:05:17,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 06:05:17,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884425599] [2022-12-14 06:05:17,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:05:17,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:05:17,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:05:17,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:05:17,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:05:17,664 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.72) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 06:05:17,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:05:17,776 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2022-12-14 06:05:17,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:05:17,779 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-12-14 06:05:17,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:05:17,787 INFO L225 Difference]: With dead ends: 74 [2022-12-14 06:05:17,787 INFO L226 Difference]: Without dead ends: 70 [2022-12-14 06:05:17,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:05:17,791 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 32 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:05:17,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 217 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:05:17,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-12-14 06:05:17,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 42. [2022-12-14 06:05:17,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 37 states have internal predecessors, (42), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 06:05:17,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-12-14 06:05:17,825 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 11 [2022-12-14 06:05:17,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:05:17,826 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-12-14 06:05:17,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 06:05:17,826 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-12-14 06:05:17,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 06:05:17,827 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:05:17,827 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:05:17,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:05:18,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:05:18,030 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:05:18,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:05:18,032 INFO L85 PathProgramCache]: Analyzing trace with hash 2008730584, now seen corresponding path program 1 times [2022-12-14 06:05:18,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:05:18,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [759427237] [2022-12-14 06:05:18,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:18,035 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:05:18,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:05:18,038 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:05:18,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-14 06:05:18,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:18,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 06:05:18,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:05:18,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:05:18,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:05:18,219 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:05:18,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [759427237] [2022-12-14 06:05:18,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [759427237] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:05:18,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:05:18,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:05:18,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163582103] [2022-12-14 06:05:18,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:05:18,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:05:18,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:05:18,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:05:18,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:05:18,221 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 06:05:18,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:05:18,298 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2022-12-14 06:05:18,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:05:18,299 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-12-14 06:05:18,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:05:18,299 INFO L225 Difference]: With dead ends: 69 [2022-12-14 06:05:18,299 INFO L226 Difference]: Without dead ends: 67 [2022-12-14 06:05:18,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:05:18,300 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 26 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:05:18,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 145 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:05:18,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-12-14 06:05:18,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 48. [2022-12-14 06:05:18,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.53125) internal successors, (49), 42 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 06:05:18,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2022-12-14 06:05:18,305 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 11 [2022-12-14 06:05:18,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:05:18,305 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2022-12-14 06:05:18,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 06:05:18,305 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2022-12-14 06:05:18,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 06:05:18,306 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:05:18,306 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:05:18,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-14 06:05:18,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:05:18,508 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:05:18,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:05:18,510 INFO L85 PathProgramCache]: Analyzing trace with hash 398308128, now seen corresponding path program 1 times [2022-12-14 06:05:18,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:05:18,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [241420229] [2022-12-14 06:05:18,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:18,512 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:05:18,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:05:18,515 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:05:18,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-14 06:05:18,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:18,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:05:18,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:05:18,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:05:18,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:05:18,714 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:05:18,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [241420229] [2022-12-14 06:05:18,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [241420229] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:05:18,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:05:18,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:05:18,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076773135] [2022-12-14 06:05:18,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:05:18,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:05:18,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:05:18,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:05:18,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:05:18,715 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 06:05:18,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:05:18,753 INFO L93 Difference]: Finished difference Result 83 states and 101 transitions. [2022-12-14 06:05:18,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:05:18,754 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-12-14 06:05:18,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:05:18,755 INFO L225 Difference]: With dead ends: 83 [2022-12-14 06:05:18,755 INFO L226 Difference]: Without dead ends: 83 [2022-12-14 06:05:18,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:05:18,756 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 85 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:05:18,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 69 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:05:18,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-12-14 06:05:18,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2022-12-14 06:05:18,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 43 states have internal predecessors, (50), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-14 06:05:18,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2022-12-14 06:05:18,761 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 12 [2022-12-14 06:05:18,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:05:18,761 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2022-12-14 06:05:18,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 06:05:18,761 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2022-12-14 06:05:18,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 06:05:18,762 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:05:18,762 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:05:18,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-14 06:05:18,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:05:18,964 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:05:18,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:05:18,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1387011810, now seen corresponding path program 1 times [2022-12-14 06:05:18,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:05:18,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221944017] [2022-12-14 06:05:18,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:18,967 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:05:18,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:05:18,970 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:05:18,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-14 06:05:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:19,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 06:05:19,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:05:19,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:05:19,160 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_10 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_10))) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-12-14 06:05:19,203 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:05:19,203 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 19 treesize of output 27 [2022-12-14 06:05:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 06:05:19,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:05:19,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:05:19,394 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:05:19,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221944017] [2022-12-14 06:05:19,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221944017] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:05:19,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [508264881] [2022-12-14 06:05:19,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:19,395 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:05:19,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:05:19,425 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:05:19,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-12-14 06:05:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:19,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 06:05:19,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:05:19,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:05:19,561 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| (_ bv1 1)) |c_#valid|)) is different from true [2022-12-14 06:05:19,581 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 06:05:19,581 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 14 treesize of output 20 [2022-12-14 06:05:19,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 06:05:19,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:05:19,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:05:19,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [508264881] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:05:19,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759090212] [2022-12-14 06:05:19,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:19,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:05:19,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:05:19,735 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:05:19,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 06:05:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:19,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 06:05:19,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:05:19,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:05:19,820 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_28 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_28))))) is different from true [2022-12-14 06:05:19,845 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:05:19,845 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 19 treesize of output 27 [2022-12-14 06:05:19,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 06:05:19,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:05:19,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:05:19,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759090212] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:05:19,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 06:05:19,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6, 5, 6, 5] total 9 [2022-12-14 06:05:19,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736570974] [2022-12-14 06:05:19,977 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 06:05:19,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 06:05:19,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:05:19,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 06:05:19,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=33, Unknown=3, NotChecked=36, Total=90 [2022-12-14 06:05:19,979 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 06:05:22,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:05:22,175 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2022-12-14 06:05:22,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 06:05:22,176 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 18 [2022-12-14 06:05:22,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:05:22,177 INFO L225 Difference]: With dead ends: 70 [2022-12-14 06:05:22,177 INFO L226 Difference]: Without dead ends: 70 [2022-12-14 06:05:22,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 85 SyntacticMatches, 9 SemanticMatches, 9 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=22, Invalid=43, Unknown=3, NotChecked=42, Total=110 [2022-12-14 06:05:22,179 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 22 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:05:22,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 159 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 118 Invalid, 0 Unknown, 153 Unchecked, 0.1s Time] [2022-12-14 06:05:22,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-12-14 06:05:22,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2022-12-14 06:05:22,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 46 states have (on average 1.5434782608695652) internal successors, (71), 55 states have internal predecessors, (71), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 06:05:22,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 83 transitions. [2022-12-14 06:05:22,185 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 83 transitions. Word has length 18 [2022-12-14 06:05:22,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:05:22,185 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 83 transitions. [2022-12-14 06:05:22,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 06:05:22,185 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 83 transitions. [2022-12-14 06:05:22,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 06:05:22,185 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:05:22,185 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:05:22,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 06:05:22,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2022-12-14 06:05:22,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-12-14 06:05:22,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:05:22,788 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:05:22,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:05:22,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1387011811, now seen corresponding path program 1 times [2022-12-14 06:05:22,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:05:22,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [107125201] [2022-12-14 06:05:22,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:22,791 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:05:22,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:05:22,792 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:05:22,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-14 06:05:22,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:22,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 06:05:22,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:05:22,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:05:22,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:05:22,994 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_39 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_39) |c_#length|)))) is different from true [2022-12-14 06:05:23,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:05:23,014 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 12 treesize of output 14 [2022-12-14 06:05:23,028 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:05:23,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:05:23,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 06:05:23,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:05:25,392 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:05:25,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [107125201] [2022-12-14 06:05:25,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [107125201] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:05:25,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1636789888] [2022-12-14 06:05:25,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:25,393 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:05:25,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:05:25,393 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:05:25,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-12-14 06:05:25,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:25,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 06:05:25,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:05:25,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:05:25,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:05:25,567 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_49 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_49) |c_#length|)))) is different from true [2022-12-14 06:05:25,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:05:25,586 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 12 treesize of output 14 [2022-12-14 06:05:25,594 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:05:25,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:05:25,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 06:05:25,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:05:25,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1636789888] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:05:25,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376006190] [2022-12-14 06:05:25,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:25,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:05:25,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:05:25,814 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:05:25,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 06:05:25,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:25,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 06:05:25,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:05:25,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:05:25,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:05:25,934 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_59 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_59) |c_#length|)))) is different from true [2022-12-14 06:05:25,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:05:25,954 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 12 treesize of output 14 [2022-12-14 06:05:25,962 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:05:25,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:05:25,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-12-14 06:05:25,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:05:28,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376006190] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:05:28,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:05:28,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2022-12-14 06:05:28,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328600887] [2022-12-14 06:05:28,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:05:28,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 06:05:28,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:05:28,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 06:05:28,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=89, Unknown=4, NotChecked=60, Total=182 [2022-12-14 06:05:28,221 INFO L87 Difference]: Start difference. First operand 63 states and 83 transitions. Second operand has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 06:05:28,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:05:28,623 INFO L93 Difference]: Finished difference Result 104 states and 132 transitions. [2022-12-14 06:05:28,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:05:28,623 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 18 [2022-12-14 06:05:28,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:05:28,625 INFO L225 Difference]: With dead ends: 104 [2022-12-14 06:05:28,625 INFO L226 Difference]: Without dead ends: 104 [2022-12-14 06:05:28,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=54, Invalid=194, Unknown=4, NotChecked=90, Total=342 [2022-12-14 06:05:28,625 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 92 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 244 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:05:28,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 158 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 253 Invalid, 0 Unknown, 244 Unchecked, 0.3s Time] [2022-12-14 06:05:28,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-12-14 06:05:28,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 78. [2022-12-14 06:05:28,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 60 states have (on average 1.5666666666666667) internal successors, (94), 69 states have internal predecessors, (94), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2022-12-14 06:05:28,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 109 transitions. [2022-12-14 06:05:28,631 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 109 transitions. Word has length 18 [2022-12-14 06:05:28,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:05:28,631 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 109 transitions. [2022-12-14 06:05:28,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.8) internal successors, (18), 11 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 06:05:28,631 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 109 transitions. [2022-12-14 06:05:28,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 06:05:28,632 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:05:28,632 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:05:28,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-12-14 06:05:28,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-12-14 06:05:29,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-14 06:05:29,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:05:29,235 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:05:29,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:05:29,237 INFO L85 PathProgramCache]: Analyzing trace with hash 881453185, now seen corresponding path program 1 times [2022-12-14 06:05:29,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:05:29,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1402726219] [2022-12-14 06:05:29,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:29,238 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:05:29,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:05:29,241 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:05:29,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-14 06:05:29,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:29,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 06:05:29,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:05:29,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:05:29,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:05:29,324 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:05:29,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1402726219] [2022-12-14 06:05:29,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1402726219] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:05:29,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:05:29,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 06:05:29,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782073395] [2022-12-14 06:05:29,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:05:29,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:05:29,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:05:29,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:05:29,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:05:29,325 INFO L87 Difference]: Start difference. First operand 78 states and 109 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 06:05:29,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:05:29,362 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2022-12-14 06:05:29,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:05:29,362 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-12-14 06:05:29,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:05:29,363 INFO L225 Difference]: With dead ends: 62 [2022-12-14 06:05:29,363 INFO L226 Difference]: Without dead ends: 60 [2022-12-14 06:05:29,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:05:29,364 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:05:29,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 154 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:05:29,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-14 06:05:29,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-12-14 06:05:29,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 55 states have internal predecessors, (71), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 06:05:29,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 79 transitions. [2022-12-14 06:05:29,368 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 79 transitions. Word has length 18 [2022-12-14 06:05:29,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:05:29,368 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 79 transitions. [2022-12-14 06:05:29,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 06:05:29,368 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 79 transitions. [2022-12-14 06:05:29,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 06:05:29,368 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:05:29,368 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:05:29,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-12-14 06:05:29,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:05:29,570 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:05:29,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:05:29,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1478437295, now seen corresponding path program 1 times [2022-12-14 06:05:29,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:05:29,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [814007434] [2022-12-14 06:05:29,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:29,573 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:05:29,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:05:29,574 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:05:29,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-14 06:05:29,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:29,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 06:05:29,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:05:29,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:05:29,655 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:05:29,656 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:05:29,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [814007434] [2022-12-14 06:05:29,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [814007434] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:05:29,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:05:29,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 06:05:29,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518607735] [2022-12-14 06:05:29,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:05:29,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:05:29,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:05:29,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:05:29,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:05:29,658 INFO L87 Difference]: Start difference. First operand 60 states and 79 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 06:05:29,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:05:29,704 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2022-12-14 06:05:29,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 06:05:29,705 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-12-14 06:05:29,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:05:29,705 INFO L225 Difference]: With dead ends: 75 [2022-12-14 06:05:29,705 INFO L226 Difference]: Without dead ends: 75 [2022-12-14 06:05:29,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:05:29,706 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:05:29,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 153 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:05:29,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-14 06:05:29,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 64. [2022-12-14 06:05:29,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 49 states have (on average 1.530612244897959) internal successors, (75), 57 states have internal predecessors, (75), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 06:05:29,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2022-12-14 06:05:29,710 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 20 [2022-12-14 06:05:29,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:05:29,710 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2022-12-14 06:05:29,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 06:05:29,710 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2022-12-14 06:05:29,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 06:05:29,711 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:05:29,711 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:05:29,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-14 06:05:29,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:05:29,913 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:05:29,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:05:29,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1073719666, now seen corresponding path program 1 times [2022-12-14 06:05:29,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:05:29,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [962430348] [2022-12-14 06:05:29,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:29,916 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:05:29,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:05:29,919 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:05:29,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-12-14 06:05:30,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:30,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:05:30,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:05:30,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 06:05:30,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:05:30,038 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:05:30,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [962430348] [2022-12-14 06:05:30,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [962430348] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:05:30,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:05:30,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:05:30,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178186675] [2022-12-14 06:05:30,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:05:30,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:05:30,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:05:30,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:05:30,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:05:30,039 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 06:05:30,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:05:30,087 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2022-12-14 06:05:30,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:05:30,087 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-12-14 06:05:30,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:05:30,088 INFO L225 Difference]: With dead ends: 63 [2022-12-14 06:05:30,088 INFO L226 Difference]: Without dead ends: 63 [2022-12-14 06:05:30,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:05:30,088 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 17 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:05:30,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 102 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:05:30,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-12-14 06:05:30,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2022-12-14 06:05:30,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.4390243902439024) internal successors, (59), 49 states have internal predecessors, (59), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 06:05:30,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2022-12-14 06:05:30,094 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 20 [2022-12-14 06:05:30,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:05:30,095 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2022-12-14 06:05:30,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 06:05:30,095 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2022-12-14 06:05:30,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 06:05:30,096 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:05:30,096 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:05:30,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-12-14 06:05:30,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:05:30,297 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:05:30,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:05:30,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1074427268, now seen corresponding path program 1 times [2022-12-14 06:05:30,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:05:30,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1270469201] [2022-12-14 06:05:30,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:30,301 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:05:30,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:05:30,304 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:05:30,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-14 06:05:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:30,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 06:05:30,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:05:30,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:05:30,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:05:30,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:05:30,571 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:05:30,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1270469201] [2022-12-14 06:05:30,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1270469201] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:05:30,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2076198306] [2022-12-14 06:05:30,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:30,572 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:05:30,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:05:30,572 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:05:30,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-12-14 06:05:30,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:30,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 06:05:30,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:05:30,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:05:30,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:05:30,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:05:30,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2076198306] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:05:30,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768505577] [2022-12-14 06:05:30,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:30,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:05:30,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:05:30,690 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:05:30,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 06:05:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:30,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 06:05:30,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:05:30,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:05:30,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:05:30,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:05:30,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768505577] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:05:30,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 06:05:30,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 5, 4] total 9 [2022-12-14 06:05:30,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87902301] [2022-12-14 06:05:30,806 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 06:05:30,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 06:05:30,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:05:30,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 06:05:30,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-14 06:05:30,808 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-14 06:05:30,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:05:30,930 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2022-12-14 06:05:30,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:05:30,931 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 21 [2022-12-14 06:05:30,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:05:30,931 INFO L225 Difference]: With dead ends: 59 [2022-12-14 06:05:30,932 INFO L226 Difference]: Without dead ends: 57 [2022-12-14 06:05:30,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 109 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-12-14 06:05:30,932 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 66 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:05:30,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 104 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:05:30,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-12-14 06:05:30,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-12-14 06:05:30,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 43 states have (on average 1.372093023255814) internal successors, (59), 49 states have internal predecessors, (59), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 06:05:30,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-12-14 06:05:30,937 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 21 [2022-12-14 06:05:30,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:05:30,937 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-12-14 06:05:30,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-14 06:05:30,937 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-12-14 06:05:30,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 06:05:30,937 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:05:30,938 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:05:30,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-12-14 06:05:31,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-12-14 06:05:31,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-14 06:05:31,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:05:31,540 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:05:31,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:05:31,542 INFO L85 PathProgramCache]: Analyzing trace with hash -807401739, now seen corresponding path program 1 times [2022-12-14 06:05:31,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:05:31,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [276880331] [2022-12-14 06:05:31,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:31,544 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:05:31,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:05:31,545 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:05:31,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-14 06:05:31,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:31,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 06:05:31,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:05:31,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 06:05:31,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:05:31,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 06:05:31,693 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:05:31,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [276880331] [2022-12-14 06:05:31,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [276880331] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:05:31,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [55354524] [2022-12-14 06:05:31,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:31,693 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:05:31,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:05:31,694 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:05:31,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-12-14 06:05:31,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:31,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 06:05:31,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:05:31,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 06:05:31,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:05:31,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 06:05:31,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [55354524] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:05:31,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378503866] [2022-12-14 06:05:31,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:31,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:05:31,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:05:31,837 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:05:31,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 06:05:31,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:31,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 06:05:31,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:05:31,903 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 06:05:31,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:05:31,931 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 06:05:31,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378503866] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:05:31,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 06:05:31,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2022-12-14 06:05:31,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019859828] [2022-12-14 06:05:31,931 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 06:05:31,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 06:05:31,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:05:31,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 06:05:31,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 06:05:31,932 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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) [2022-12-14 06:05:32,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:05:32,036 INFO L93 Difference]: Finished difference Result 135 states and 155 transitions. [2022-12-14 06:05:32,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 06:05:32,037 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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) Word has length 22 [2022-12-14 06:05:32,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:05:32,038 INFO L225 Difference]: With dead ends: 135 [2022-12-14 06:05:32,038 INFO L226 Difference]: Without dead ends: 135 [2022-12-14 06:05:32,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-12-14 06:05:32,042 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 263 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:05:32,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 146 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:05:32,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-12-14 06:05:32,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 75. [2022-12-14 06:05:32,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 59 states have (on average 1.3389830508474576) internal successors, (79), 63 states have internal predecessors, (79), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2022-12-14 06:05:32,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 93 transitions. [2022-12-14 06:05:32,048 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 93 transitions. Word has length 22 [2022-12-14 06:05:32,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:05:32,048 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 93 transitions. [2022-12-14 06:05:32,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 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) [2022-12-14 06:05:32,049 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 93 transitions. [2022-12-14 06:05:32,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 06:05:32,049 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:05:32,049 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:05:32,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-12-14 06:05:32,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 06:05:32,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-12-14 06:05:32,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:05:32,652 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:05:32,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:05:32,653 INFO L85 PathProgramCache]: Analyzing trace with hash -2128418719, now seen corresponding path program 1 times [2022-12-14 06:05:32,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:05:32,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780990802] [2022-12-14 06:05:32,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:32,654 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:05:32,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:05:32,656 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:05:32,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-12-14 06:05:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:32,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 06:05:32,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:05:32,820 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_entry_point_~array~0#1.base| (_ BitVec 32))) (and (= (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1)) |c_#valid|) (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base|) (_ bv0 1)))) is different from true [2022-12-14 06:05:32,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:05:32,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:05:32,912 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret38#1.base_40| (_ BitVec 32))) (or (= |c_ULTIMATE.start_main_old_#valid#1| (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret38#1.base_40| (_ bv0 1))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret38#1.base_40|))))) is different from false [2022-12-14 06:05:32,913 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:05:32,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780990802] [2022-12-14 06:05:32,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780990802] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:05:32,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1208614262] [2022-12-14 06:05:32,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:32,914 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:05:32,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:05:32,915 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:05:32,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-12-14 06:05:32,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:32,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 06:05:32,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:05:33,136 WARN L859 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32))) (exists ((|ULTIMATE.start_entry_point_~array~0#1.base| (_ BitVec 32))) (and (= (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1)) |c_#valid|) (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base|) (_ bv0 1))))) is different from true [2022-12-14 06:05:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:05:33,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:05:33,199 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret38#1.base_43| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret38#1.base_43|) (_ bv0 1))) (= (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret38#1.base_43| (_ bv0 1)) |c_ULTIMATE.start_main_old_#valid#1|))) is different from false [2022-12-14 06:05:33,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1208614262] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:05:33,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049955766] [2022-12-14 06:05:33,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:33,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:05:33,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:05:33,201 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:05:33,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 06:05:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:33,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 06:05:33,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:05:33,301 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 13 treesize of output 9 [2022-12-14 06:05:33,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:05:33,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:05:33,408 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret38#1.base_46| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret38#1.base_46|) (_ bv0 1))) (= (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret38#1.base_46| (_ bv0 1)) |c_ULTIMATE.start_main_old_#valid#1|))) is different from false [2022-12-14 06:05:33,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049955766] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:05:33,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:05:33,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-12-14 06:05:33,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335160505] [2022-12-14 06:05:33,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:05:33,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 06:05:33,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:05:33,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 06:05:33,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=150, Unknown=5, NotChecked=140, Total=342 [2022-12-14 06:05:33,411 INFO L87 Difference]: Start difference. First operand 75 states and 93 transitions. Second operand has 16 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 06:05:33,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:05:33,717 INFO L93 Difference]: Finished difference Result 116 states and 145 transitions. [2022-12-14 06:05:33,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 06:05:33,718 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 24 [2022-12-14 06:05:33,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:05:33,719 INFO L225 Difference]: With dead ends: 116 [2022-12-14 06:05:33,719 INFO L226 Difference]: Without dead ends: 109 [2022-12-14 06:05:33,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 101 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 5 IntricatePredicates, 2 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=311, Unknown=5, NotChecked=200, Total=600 [2022-12-14 06:05:33,720 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 86 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:05:33,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 134 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 127 Invalid, 0 Unknown, 132 Unchecked, 0.2s Time] [2022-12-14 06:05:33,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-12-14 06:05:33,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 96. [2022-12-14 06:05:33,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 77 states have (on average 1.3506493506493507) internal successors, (104), 81 states have internal predecessors, (104), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (15), 12 states have call predecessors, (15), 8 states have call successors, (15) [2022-12-14 06:05:33,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 127 transitions. [2022-12-14 06:05:33,726 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 127 transitions. Word has length 24 [2022-12-14 06:05:33,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:05:33,726 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 127 transitions. [2022-12-14 06:05:33,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 06:05:33,727 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 127 transitions. [2022-12-14 06:05:33,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 06:05:33,728 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:05:33,728 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:05:33,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-14 06:05:33,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-12-14 06:05:34,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-12-14 06:05:34,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 06:05:34,330 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:05:34,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:05:34,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1844216072, now seen corresponding path program 1 times [2022-12-14 06:05:34,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:05:34,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1913550335] [2022-12-14 06:05:34,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:34,333 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:05:34,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:05:34,335 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:05:34,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-12-14 06:05:34,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:34,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 06:05:34,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:05:34,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:05:34,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:05:34,510 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_145 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_145) |c_#length|)))) is different from true [2022-12-14 06:05:34,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:05:34,522 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 12 treesize of output 14 [2022-12-14 06:05:34,531 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:05:34,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:05:34,619 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_146 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_146) |c_#length|)))) is different from true [2022-12-14 06:05:34,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:05:34,635 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 12 treesize of output 14 [2022-12-14 06:05:34,643 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:05:34,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:05:34,681 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 6 not checked. [2022-12-14 06:05:34,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:05:36,970 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:05:36,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1913550335] [2022-12-14 06:05:36,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1913550335] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:05:36,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1836528109] [2022-12-14 06:05:36,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:36,971 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:05:36,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:05:36,972 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:05:36,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-12-14 06:05:37,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:37,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 06:05:37,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:05:37,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:05:37,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:05:37,130 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_164 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_164) |c_#length|)))) is different from true [2022-12-14 06:05:37,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:05:37,143 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 12 treesize of output 14 [2022-12-14 06:05:37,151 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:05:37,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:05:37,203 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_165 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_165))))) is different from true [2022-12-14 06:05:37,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:05:37,216 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 12 treesize of output 14 [2022-12-14 06:05:37,224 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:05:37,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:05:37,238 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 6 not checked. [2022-12-14 06:05:37,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:05:37,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1836528109] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:05:37,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272844362] [2022-12-14 06:05:37,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:37,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:05:37,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:05:37,447 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:05:37,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 06:05:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:37,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 06:05:37,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:05:37,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:05:37,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:05:37,582 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_183 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_183) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-12-14 06:05:37,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:05:37,601 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 12 treesize of output 14 [2022-12-14 06:05:37,610 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:05:37,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:05:37,667 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_184 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_184))))) is different from true [2022-12-14 06:05:37,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:05:37,684 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 12 treesize of output 14 [2022-12-14 06:05:37,691 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:05:37,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:05:37,708 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 6 not checked. [2022-12-14 06:05:37,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:05:37,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272844362] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:05:37,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:05:37,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 16 [2022-12-14 06:05:37,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461326648] [2022-12-14 06:05:37,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:05:37,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 06:05:37,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:05:37,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 06:05:37,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=131, Unknown=6, NotChecked=162, Total=342 [2022-12-14 06:05:37,965 INFO L87 Difference]: Start difference. First operand 96 states and 127 transitions. Second operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 06:05:38,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:05:38,538 INFO L93 Difference]: Finished difference Result 125 states and 155 transitions. [2022-12-14 06:05:38,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 06:05:38,539 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 28 [2022-12-14 06:05:38,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:05:38,540 INFO L225 Difference]: With dead ends: 125 [2022-12-14 06:05:38,540 INFO L226 Difference]: Without dead ends: 124 [2022-12-14 06:05:38,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=81, Invalid=317, Unknown=6, NotChecked=246, Total=650 [2022-12-14 06:05:38,541 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 115 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 354 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:05:38,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 152 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 247 Invalid, 0 Unknown, 354 Unchecked, 0.3s Time] [2022-12-14 06:05:38,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-12-14 06:05:38,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 109. [2022-12-14 06:05:38,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 90 states have (on average 1.3666666666666667) internal successors, (123), 94 states have internal predecessors, (123), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (15), 12 states have call predecessors, (15), 8 states have call successors, (15) [2022-12-14 06:05:38,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 146 transitions. [2022-12-14 06:05:38,546 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 146 transitions. Word has length 28 [2022-12-14 06:05:38,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:05:38,546 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 146 transitions. [2022-12-14 06:05:38,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-14 06:05:38,546 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 146 transitions. [2022-12-14 06:05:38,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 06:05:38,547 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:05:38,547 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:05:38,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2022-12-14 06:05:38,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-14 06:05:38,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-12-14 06:05:39,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:05:39,149 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:05:39,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:05:39,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1022360221, now seen corresponding path program 1 times [2022-12-14 06:05:39,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:05:39,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060440471] [2022-12-14 06:05:39,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:39,152 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:05:39,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:05:39,155 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:05:39,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-12-14 06:05:39,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:39,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 06:05:39,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:05:39,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:05:39,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:05:39,810 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 11 treesize of output 9 [2022-12-14 06:05:40,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:05:40,045 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:05:40,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060440471] [2022-12-14 06:05:40,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060440471] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:05:40,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1740401935] [2022-12-14 06:05:40,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:40,045 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:05:40,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:05:40,046 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:05:40,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-12-14 06:05:40,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:40,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 06:05:40,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:05:40,211 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:05:40,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:05:44,382 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 11 treesize of output 9 [2022-12-14 06:05:44,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:05:44,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1740401935] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:05:44,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364419403] [2022-12-14 06:05:44,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:44,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:05:44,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:05:44,423 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:05:44,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-14 06:05:44,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:44,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 06:05:44,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:05:44,580 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:05:44,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:05:52,853 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 11 treesize of output 9 [2022-12-14 06:05:52,906 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:05:52,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364419403] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:05:52,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 06:05:52,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 17 [2022-12-14 06:05:52,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255864756] [2022-12-14 06:05:52,907 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 06:05:52,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 06:05:52,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:05:52,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 06:05:52,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=254, Unknown=5, NotChecked=0, Total=306 [2022-12-14 06:05:52,909 INFO L87 Difference]: Start difference. First operand 109 states and 146 transitions. Second operand has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 5 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 06:05:54,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:05:54,854 INFO L93 Difference]: Finished difference Result 179 states and 210 transitions. [2022-12-14 06:05:54,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 06:05:54,855 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 5 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 30 [2022-12-14 06:05:54,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:05:54,856 INFO L225 Difference]: With dead ends: 179 [2022-12-14 06:05:54,856 INFO L226 Difference]: Without dead ends: 179 [2022-12-14 06:05:54,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=105, Invalid=540, Unknown=5, NotChecked=0, Total=650 [2022-12-14 06:05:54,857 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 123 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:05:54,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 268 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 06:05:54,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-12-14 06:05:54,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 106. [2022-12-14 06:05:54,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 87 states have (on average 1.3448275862068966) internal successors, (117), 91 states have internal predecessors, (117), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (15), 12 states have call predecessors, (15), 8 states have call successors, (15) [2022-12-14 06:05:54,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 140 transitions. [2022-12-14 06:05:54,864 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 140 transitions. Word has length 30 [2022-12-14 06:05:54,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:05:54,864 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 140 transitions. [2022-12-14 06:05:54,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.764705882352941) internal successors, (47), 16 states have internal predecessors, (47), 5 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 06:05:54,864 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 140 transitions. [2022-12-14 06:05:54,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 06:05:54,865 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:05:54,865 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:05:54,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-12-14 06:05:55,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-12-14 06:05:55,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2022-12-14 06:05:55,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 06:05:55,469 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:05:55,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:05:55,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1628395789, now seen corresponding path program 1 times [2022-12-14 06:05:55,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:05:55,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1303854321] [2022-12-14 06:05:55,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:55,471 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:05:55,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:05:55,472 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:05:55,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-12-14 06:05:55,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:55,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 06:05:55,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:05:55,620 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 15 treesize of output 11 [2022-12-14 06:05:55,745 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 [2022-12-14 06:05:55,756 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 06:05:55,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:05:55,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 06:05:55,900 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:05:55,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1303854321] [2022-12-14 06:05:55,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1303854321] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:05:55,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1335108392] [2022-12-14 06:05:55,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:55,900 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:05:55,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:05:55,901 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:05:55,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-12-14 06:05:55,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:55,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 06:05:55,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:05:56,021 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 15 treesize of output 11 [2022-12-14 06:05:56,096 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 [2022-12-14 06:05:56,098 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 06:05:56,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:05:56,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 06:05:56,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1335108392] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:05:56,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383774140] [2022-12-14 06:05:56,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:05:56,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:05:56,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:05:56,151 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:05:56,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-14 06:05:56,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:05:56,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 06:05:56,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:05:56,243 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 15 treesize of output 11 [2022-12-14 06:05:56,332 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 [2022-12-14 06:05:56,334 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 06:05:56,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:05:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 06:05:56,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383774140] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:05:56,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 06:05:56,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 11, 8, 11, 8] total 16 [2022-12-14 06:05:56,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281252518] [2022-12-14 06:05:56,391 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 06:05:56,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 06:05:56,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:05:56,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 06:05:56,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-12-14 06:05:56,392 INFO L87 Difference]: Start difference. First operand 106 states and 140 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 14 states have internal predecessors, (38), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 06:05:59,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:06:01,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:06:03,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:06:03,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:06:03,854 INFO L93 Difference]: Finished difference Result 178 states and 203 transitions. [2022-12-14 06:06:03,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 06:06:03,855 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 14 states have internal predecessors, (38), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 31 [2022-12-14 06:06:03,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:06:03,856 INFO L225 Difference]: With dead ends: 178 [2022-12-14 06:06:03,856 INFO L226 Difference]: Without dead ends: 178 [2022-12-14 06:06:03,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 162 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=239, Invalid=1321, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 06:06:03,856 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 251 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 18 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-12-14 06:06:03,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 273 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 566 Invalid, 3 Unknown, 0 Unchecked, 6.7s Time] [2022-12-14 06:06:03,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-12-14 06:06:03,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 114. [2022-12-14 06:06:03,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 93 states have (on average 1.3333333333333333) internal successors, (124), 98 states have internal predecessors, (124), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (15), 12 states have call predecessors, (15), 8 states have call successors, (15) [2022-12-14 06:06:03,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 147 transitions. [2022-12-14 06:06:03,860 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 147 transitions. Word has length 31 [2022-12-14 06:06:03,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:06:03,860 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 147 transitions. [2022-12-14 06:06:03,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 14 states have internal predecessors, (38), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 06:06:03,861 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 147 transitions. [2022-12-14 06:06:03,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-14 06:06:03,861 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:06:03,861 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:06:03,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2022-12-14 06:06:04,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-12-14 06:06:04,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-14 06:06:04,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:06:04,464 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:06:04,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:06:04,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1059338178, now seen corresponding path program 1 times [2022-12-14 06:06:04,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:06:04,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [469060661] [2022-12-14 06:06:04,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:06:04,466 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:06:04,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:06:04,467 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:06:04,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-12-14 06:06:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:06:04,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 06:06:04,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:06:04,823 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 15 treesize of output 11 [2022-12-14 06:06:05,140 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 [2022-12-14 06:06:05,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:06:05,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:06:05,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 06:06:05,469 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:06:05,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [469060661] [2022-12-14 06:06:05,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [469060661] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:06:05,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [751099879] [2022-12-14 06:06:05,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:06:05,470 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:06:05,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:06:05,473 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:06:05,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-12-14 06:06:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:06:05,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 06:06:05,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:06:05,724 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 15 treesize of output 11 [2022-12-14 06:06:06,040 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 [2022-12-14 06:06:06,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:06:06,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:06:06,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 06:06:06,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [751099879] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:06:06,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949336052] [2022-12-14 06:06:06,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:06:06,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:06:06,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:06:06,125 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:06:06,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-14 06:06:06,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:06:06,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 06:06:06,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:06:06,241 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 15 treesize of output 11 [2022-12-14 06:06:06,453 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 [2022-12-14 06:06:06,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:06:06,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:06:06,525 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 06:06:06,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949336052] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:06:06,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 06:06:06,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 12, 8, 12, 8] total 30 [2022-12-14 06:06:06,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223228024] [2022-12-14 06:06:06,526 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 06:06:06,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 06:06:06,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:06:06,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 06:06:06,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2022-12-14 06:06:06,527 INFO L87 Difference]: Start difference. First operand 114 states and 147 transitions. Second operand has 31 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 26 states have internal predecessors, (67), 7 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-12-14 06:06:08,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:06:10,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:06:14,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:06:16,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:06:18,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:06:20,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:06:22,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:06:22,268 INFO L93 Difference]: Finished difference Result 181 states and 205 transitions. [2022-12-14 06:06:22,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 06:06:22,269 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 26 states have internal predecessors, (67), 7 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 32 [2022-12-14 06:06:22,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:06:22,270 INFO L225 Difference]: With dead ends: 181 [2022-12-14 06:06:22,270 INFO L226 Difference]: Without dead ends: 181 [2022-12-14 06:06:22,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 156 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=386, Invalid=2164, Unknown=0, NotChecked=0, Total=2550 [2022-12-14 06:06:22,271 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 274 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 21 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2022-12-14 06:06:22,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 269 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 821 Invalid, 6 Unknown, 0 Unchecked, 13.9s Time] [2022-12-14 06:06:22,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-12-14 06:06:22,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 122. [2022-12-14 06:06:22,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 99 states have (on average 1.3232323232323233) internal successors, (131), 105 states have internal predecessors, (131), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (15), 12 states have call predecessors, (15), 8 states have call successors, (15) [2022-12-14 06:06:22,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 154 transitions. [2022-12-14 06:06:22,274 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 154 transitions. Word has length 32 [2022-12-14 06:06:22,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:06:22,274 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 154 transitions. [2022-12-14 06:06:22,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 26 states have internal predecessors, (67), 7 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-12-14 06:06:22,275 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 154 transitions. [2022-12-14 06:06:22,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 06:06:22,275 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:06:22,275 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:06:22,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-12-14 06:06:22,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2022-12-14 06:06:22,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-12-14 06:06:22,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:06:22,878 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:06:22,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:06:22,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1520254763, now seen corresponding path program 1 times [2022-12-14 06:06:22,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:06:22,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [606820606] [2022-12-14 06:06:22,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:06:22,880 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:06:22,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:06:22,883 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:06:22,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-12-14 06:06:23,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:06:23,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 06:06:23,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:06:23,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:06:23,187 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 15 treesize of output 11 [2022-12-14 06:06:23,262 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 11 treesize of output 5 [2022-12-14 06:06:23,341 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 [2022-12-14 06:06:23,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:06:23,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:06:23,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:06:23,766 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:06:23,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [606820606] [2022-12-14 06:06:23,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [606820606] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:06:23,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1844449129] [2022-12-14 06:06:23,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:06:23,767 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:06:23,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:06:23,768 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:06:23,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-12-14 06:06:23,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:06:23,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 06:06:23,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:06:23,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:06:23,929 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 15 treesize of output 11 [2022-12-14 06:06:23,957 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 11 treesize of output 5 [2022-12-14 06:06:24,008 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 [2022-12-14 06:06:24,015 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:06:24,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:06:25,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:06:25,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1844449129] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:06:25,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783062825] [2022-12-14 06:06:25,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:06:25,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:06:25,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:06:25,968 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:06:25,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-14 06:06:26,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:06:26,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 06:06:26,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:06:26,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:06:26,075 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 15 treesize of output 11 [2022-12-14 06:06:26,101 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 11 treesize of output 5 [2022-12-14 06:06:26,144 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 [2022-12-14 06:06:26,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:06:26,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:06:28,355 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:06:28,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783062825] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:06:28,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 06:06:28,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 12, 9, 12, 9] total 19 [2022-12-14 06:06:28,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228749008] [2022-12-14 06:06:28,356 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 06:06:28,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 06:06:28,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:06:28,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 06:06:28,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=331, Unknown=1, NotChecked=0, Total=380 [2022-12-14 06:06:28,357 INFO L87 Difference]: Start difference. First operand 122 states and 154 transitions. Second operand has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 06:06:32,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 06:06:32,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:06:32,539 INFO L93 Difference]: Finished difference Result 175 states and 217 transitions. [2022-12-14 06:06:32,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 06:06:32,540 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) Word has length 33 [2022-12-14 06:06:32,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:06:32,541 INFO L225 Difference]: With dead ends: 175 [2022-12-14 06:06:32,541 INFO L226 Difference]: Without dead ends: 175 [2022-12-14 06:06:32,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 176 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=136, Invalid=985, Unknown=1, NotChecked=0, Total=1122 [2022-12-14 06:06:32,542 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 45 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:06:32,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 404 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 850 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2022-12-14 06:06:32,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-12-14 06:06:32,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 149. [2022-12-14 06:06:32,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 124 states have (on average 1.3064516129032258) internal successors, (162), 130 states have internal predecessors, (162), 10 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (19), 14 states have call predecessors, (19), 10 states have call successors, (19) [2022-12-14 06:06:32,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 191 transitions. [2022-12-14 06:06:32,548 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 191 transitions. Word has length 33 [2022-12-14 06:06:32,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:06:32,548 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 191 transitions. [2022-12-14 06:06:32,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.473684210526316) internal successors, (47), 17 states have internal predecessors, (47), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 06:06:32,548 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 191 transitions. [2022-12-14 06:06:32,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 06:06:32,549 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:06:32,549 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:06:32,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2022-12-14 06:06:32,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-12-14 06:06:32,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-12-14 06:06:33,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:06:33,151 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:06:33,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:06:33,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1308903850, now seen corresponding path program 2 times [2022-12-14 06:06:33,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:06:33,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1705585527] [2022-12-14 06:06:33,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 06:06:33,152 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:06:33,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:06:33,153 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:06:33,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-12-14 06:06:33,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 06:06:33,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:06:33,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 06:06:33,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:06:33,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:06:33,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:06:33,253 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:06:33,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1705585527] [2022-12-14 06:06:33,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1705585527] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:06:33,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:06:33,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 06:06:33,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192870870] [2022-12-14 06:06:33,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:06:33,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 06:06:33,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:06:33,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 06:06:33,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:06:33,254 INFO L87 Difference]: Start difference. First operand 149 states and 191 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 06:06:33,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:06:33,277 INFO L93 Difference]: Finished difference Result 103 states and 117 transitions. [2022-12-14 06:06:33,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:06:33,277 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2022-12-14 06:06:33,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:06:33,278 INFO L225 Difference]: With dead ends: 103 [2022-12-14 06:06:33,278 INFO L226 Difference]: Without dead ends: 99 [2022-12-14 06:06:33,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:06:33,278 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 21 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:06:33,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 129 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:06:33,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-12-14 06:06:33,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 92. [2022-12-14 06:06:33,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 73 states have (on average 1.2876712328767124) internal successors, (94), 81 states have internal predecessors, (94), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 06:06:33,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2022-12-14 06:06:33,281 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 33 [2022-12-14 06:06:33,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:06:33,281 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2022-12-14 06:06:33,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 06:06:33,281 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2022-12-14 06:06:33,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 06:06:33,281 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:06:33,282 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:06:33,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-12-14 06:06:33,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:06:33,483 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:06:33,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:06:33,484 INFO L85 PathProgramCache]: Analyzing trace with hash 520579815, now seen corresponding path program 1 times [2022-12-14 06:06:33,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:06:33,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [761269808] [2022-12-14 06:06:33,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:06:33,484 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:06:33,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:06:33,485 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:06:33,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-12-14 06:06:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:06:33,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 06:06:33,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:06:33,602 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:06:33,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:06:33,724 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:06:33,725 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:06:33,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [761269808] [2022-12-14 06:06:33,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [761269808] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:06:33,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1627319529] [2022-12-14 06:06:33,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:06:33,725 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:06:33,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:06:33,726 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:06:33,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-12-14 06:06:33,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:06:33,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 06:06:33,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:06:33,852 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:06:33,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:06:33,915 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:06:33,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1627319529] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:06:33,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926811562] [2022-12-14 06:06:33,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:06:33,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:06:33,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:06:33,916 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:06:33,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-14 06:06:33,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:06:33,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 06:06:33,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:06:34,011 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:06:34,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:06:34,190 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:06:34,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926811562] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:06:34,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 06:06:34,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 7] total 13 [2022-12-14 06:06:34,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389737185] [2022-12-14 06:06:34,190 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 06:06:34,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 06:06:34,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:06:34,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 06:06:34,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-12-14 06:06:34,192 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 06:06:34,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:06:34,360 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2022-12-14 06:06:34,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 06:06:34,361 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 36 [2022-12-14 06:06:34,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:06:34,361 INFO L225 Difference]: With dead ends: 97 [2022-12-14 06:06:34,361 INFO L226 Difference]: Without dead ends: 97 [2022-12-14 06:06:34,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-12-14 06:06:34,362 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 53 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:06:34,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 237 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:06:34,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-12-14 06:06:34,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2022-12-14 06:06:34,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 77 states have internal predecessors, (84), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 06:06:34,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2022-12-14 06:06:34,364 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 36 [2022-12-14 06:06:34,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:06:34,364 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2022-12-14 06:06:34,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 06:06:34,365 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2022-12-14 06:06:34,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 06:06:34,365 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:06:34,365 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:06:34,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2022-12-14 06:06:34,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-12-14 06:06:34,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-12-14 06:06:34,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:06:34,967 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:06:34,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:06:34,968 INFO L85 PathProgramCache]: Analyzing trace with hash -159020851, now seen corresponding path program 2 times [2022-12-14 06:06:34,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:06:34,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330169641] [2022-12-14 06:06:34,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 06:06:34,970 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:06:34,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:06:34,972 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:06:34,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-12-14 06:06:35,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 06:06:35,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:06:35,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 06:06:35,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:06:35,146 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:06:35,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:06:35,273 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_395 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_395))))) is different from true [2022-12-14 06:06:35,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:06:35,288 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 12 treesize of output 14 [2022-12-14 06:06:35,301 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:06:35,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:06:35,419 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_396 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_396))) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-12-14 06:06:35,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:06:35,434 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 12 treesize of output 14 [2022-12-14 06:06:35,444 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:06:35,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:06:35,567 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_397 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_397))))) is different from true [2022-12-14 06:06:35,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:06:35,582 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 12 treesize of output 14 [2022-12-14 06:06:35,592 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:06:35,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:06:35,642 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 12 not checked. [2022-12-14 06:06:35,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:06:40,014 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:06:40,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [330169641] [2022-12-14 06:06:40,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [330169641] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:06:40,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1752223623] [2022-12-14 06:06:40,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 06:06:40,015 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:06:40,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:06:40,016 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:06:40,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-12-14 06:06:40,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 06:06:40,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:06:40,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 06:06:40,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:06:40,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:06:40,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:06:40,240 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_423 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_423) |c_#length|)))) is different from true [2022-12-14 06:06:40,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:06:40,254 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 12 treesize of output 14 [2022-12-14 06:06:40,264 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:06:40,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:06:40,327 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_424 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_424))))) is different from true [2022-12-14 06:06:40,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:06:40,344 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 12 treesize of output 14 [2022-12-14 06:06:40,357 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:06:40,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:06:40,419 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_425 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_425) |c_#length|)))) is different from true [2022-12-14 06:06:40,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:06:40,435 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 12 treesize of output 14 [2022-12-14 06:06:40,447 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:06:40,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:06:40,464 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 12 not checked. [2022-12-14 06:06:40,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:06:42,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1752223623] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:06:42,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093962153] [2022-12-14 06:06:42,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 06:06:42,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:06:42,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:06:42,691 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:06:42,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-14 06:06:42,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 06:06:42,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:06:42,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 06:06:42,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:06:42,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:06:42,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:06:42,843 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_451 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_451))))) is different from true [2022-12-14 06:06:42,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:06:42,857 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 12 treesize of output 14 [2022-12-14 06:06:42,866 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:06:42,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:06:42,939 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_452 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_452))))) is different from true [2022-12-14 06:06:42,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:06:42,958 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 12 treesize of output 14 [2022-12-14 06:06:42,970 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:06:42,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:06:43,036 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_453 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_453) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-12-14 06:06:43,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:06:43,052 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 12 treesize of output 14 [2022-12-14 06:06:43,065 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:06:43,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:06:43,082 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 12 not checked. [2022-12-14 06:06:43,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:06:43,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093962153] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:06:43,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:06:43,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 21 [2022-12-14 06:06:43,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583629819] [2022-12-14 06:06:43,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:06:43,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 06:06:43,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:06:43,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 06:06:43,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=178, Unknown=11, NotChecked=306, Total=552 [2022-12-14 06:06:43,408 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand has 22 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 4 states have call successors, (4), 2 states have call predecessors, (4), 10 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 06:06:44,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:06:44,388 INFO L93 Difference]: Finished difference Result 123 states and 131 transitions. [2022-12-14 06:06:44,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 06:06:44,389 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 4 states have call successors, (4), 2 states have call predecessors, (4), 10 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 38 [2022-12-14 06:06:44,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:06:44,389 INFO L225 Difference]: With dead ends: 123 [2022-12-14 06:06:44,390 INFO L226 Difference]: Without dead ends: 123 [2022-12-14 06:06:44,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=108, Invalid=469, Unknown=11, NotChecked=468, Total=1056 [2022-12-14 06:06:44,390 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 108 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 828 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:06:44,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 310 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 437 Invalid, 0 Unknown, 828 Unchecked, 0.6s Time] [2022-12-14 06:06:44,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-12-14 06:06:44,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 103. [2022-12-14 06:06:44,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 84 states have (on average 1.25) internal successors, (105), 91 states have internal predecessors, (105), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 06:06:44,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2022-12-14 06:06:44,393 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 38 [2022-12-14 06:06:44,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:06:44,393 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2022-12-14 06:06:44,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 4 states have call successors, (4), 2 states have call predecessors, (4), 10 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 06:06:44,393 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2022-12-14 06:06:44,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 06:06:44,393 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:06:44,394 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:06:44,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-12-14 06:06:44,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-12-14 06:06:44,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (43)] Ended with exit code 0 [2022-12-14 06:06:44,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 06:06:44,996 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:06:44,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:06:44,997 INFO L85 PathProgramCache]: Analyzing trace with hash 2060951864, now seen corresponding path program 1 times [2022-12-14 06:06:44,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:06:44,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1390193904] [2022-12-14 06:06:44,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:06:44,999 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:06:44,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:06:45,001 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:06:45,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-12-14 06:06:45,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:06:45,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 06:06:45,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:06:45,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:06:45,189 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:06:45,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:06:45,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 06:06:45,335 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 7 treesize of output 5 [2022-12-14 06:06:49,490 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 [2022-12-14 06:06:49,532 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 14 treesize of output 20 [2022-12-14 06:06:49,559 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:06:49,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:06:50,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-14 06:06:50,266 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:06:50,266 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:06:50,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1390193904] [2022-12-14 06:06:50,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1390193904] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:06:50,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1952084806] [2022-12-14 06:06:50,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:06:50,267 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:06:50,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:06:50,267 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:06:50,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-12-14 06:06:50,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:06:50,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 06:06:50,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:06:50,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:06:50,447 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:06:50,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:06:50,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 06:06:50,541 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 7 treesize of output 5 [2022-12-14 06:06:52,669 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 [2022-12-14 06:06:52,688 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 14 treesize of output 20 [2022-12-14 06:06:52,701 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:06:52,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:06:55,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-14 06:06:55,159 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:06:55,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1952084806] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:06:55,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231904091] [2022-12-14 06:06:55,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:06:55,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:06:55,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:06:55,160 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:06:55,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-12-14 06:06:55,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:06:55,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 06:06:55,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:06:55,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:06:55,284 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:06:55,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:06:55,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 06:06:57,438 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_70| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_70|) (_ bv0 32)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_70|))) is different from true [2022-12-14 06:06:57,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:06:57,599 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2022-12-14 06:06:57,673 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 14 treesize of output 20 [2022-12-14 06:06:57,777 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-12-14 06:06:57,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:06:57,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2022-12-14 06:06:59,085 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:06:59,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231904091] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:06:59,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 06:06:59,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14, 13, 16, 16] total 41 [2022-12-14 06:06:59,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661631369] [2022-12-14 06:06:59,086 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 06:06:59,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-14 06:06:59,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:06:59,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-14 06:06:59,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1447, Unknown=3, NotChecked=78, Total=1722 [2022-12-14 06:06:59,088 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand has 42 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 37 states have internal predecessors, (91), 8 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-12-14 06:07:01,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:07:03,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:07:05,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:07:10,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:07:12,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:07:14,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:07:19,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:07:19,534 INFO L93 Difference]: Finished difference Result 163 states and 169 transitions. [2022-12-14 06:07:19,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-14 06:07:19,535 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 37 states have internal predecessors, (91), 8 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 38 [2022-12-14 06:07:19,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:07:19,535 INFO L225 Difference]: With dead ends: 163 [2022-12-14 06:07:19,535 INFO L226 Difference]: Without dead ends: 163 [2022-12-14 06:07:19,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 169 SyntacticMatches, 15 SemanticMatches, 76 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=883, Invalid=4970, Unknown=3, NotChecked=150, Total=6006 [2022-12-14 06:07:19,536 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 389 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 65 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2022-12-14 06:07:19,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 298 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 967 Invalid, 6 Unknown, 108 Unchecked, 13.8s Time] [2022-12-14 06:07:19,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-12-14 06:07:19,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 113. [2022-12-14 06:07:19,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 93 states have (on average 1.2795698924731183) internal successors, (119), 100 states have internal predecessors, (119), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 06:07:19,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 132 transitions. [2022-12-14 06:07:19,540 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 132 transitions. Word has length 38 [2022-12-14 06:07:19,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:07:19,540 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 132 transitions. [2022-12-14 06:07:19,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 37 states have internal predecessors, (91), 8 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-12-14 06:07:19,540 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 132 transitions. [2022-12-14 06:07:19,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 06:07:19,540 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:07:19,540 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:07:19,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-12-14 06:07:19,748 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-12-14 06:07:19,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (46)] Ended with exit code 0 [2022-12-14 06:07:20,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 06:07:20,142 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:07:20,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:07:20,143 INFO L85 PathProgramCache]: Analyzing trace with hash 594821051, now seen corresponding path program 1 times [2022-12-14 06:07:20,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:07:20,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [908423924] [2022-12-14 06:07:20,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:07:20,145 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:07:20,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:07:20,146 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:07:20,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-12-14 06:07:20,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:07:20,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 06:07:20,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:07:20,551 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 15 treesize of output 11 [2022-12-14 06:07:20,701 INFO L321 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-12-14 06:07:20,701 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 36 treesize of output 33 [2022-12-14 06:07:20,843 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 33 treesize of output 21 [2022-12-14 06:07:31,212 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_entry_point_~array~0#1.base| (_ BitVec 32))) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base|) (_ bv0 1)) (exists ((|v_ULTIMATE.start_entry_point_#t~mem42#1.base_29| (_ BitVec 32)) (v_ArrVal_517 (_ BitVec 1))) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base| v_ArrVal_517))) (and (= |c_#valid| (store (store .cse0 |v_ULTIMATE.start_entry_point_#t~mem42#1.base_29| (_ bv0 1)) |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1))) (= (_ bv0 1) (select .cse0 |v_ULTIMATE.start_entry_point_#t~mem42#1.base_29|))))))) is different from true [2022-12-14 06:07:31,222 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 06:07:31,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:07:40,727 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret40#1.base_138| (_ BitVec 32))) (or (= |c_ULTIMATE.start_main_old_#valid#1| (store (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret40#1.base_138| (_ bv0 1)) |c_ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret40#1.base_138|))))) is different from false [2022-12-14 06:07:40,729 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:07:40,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [908423924] [2022-12-14 06:07:40,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [908423924] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:07:40,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1366541062] [2022-12-14 06:07:40,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:07:40,729 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:07:40,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:07:40,730 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:07:40,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-12-14 06:07:40,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:07:40,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 06:07:40,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:07:43,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 06:07:43,831 INFO L321 Elim1Store]: treesize reduction 24, result has 17.2 percent of original size [2022-12-14 06:07:43,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 36 [2022-12-14 06:07:44,046 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 33 treesize of output 21 [2022-12-14 06:07:44,507 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_entry_point_#t~mem42#1.base_31| (_ BitVec 32)) (|ULTIMATE.start_entry_point_~array~0#1.base| (_ BitVec 32)) (v_ArrVal_517 (_ BitVec 1))) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base| v_ArrVal_517))) (let ((.cse1 (store .cse0 |v_ULTIMATE.start_entry_point_#t~mem42#1.base_31| (_ bv0 1)))) (and (= (select .cse0 |v_ULTIMATE.start_entry_point_#t~mem42#1.base_31|) (_ bv0 1)) (= (_ bv0 1) (bvadd (select .cse1 |ULTIMATE.start_entry_point_~array~0#1.base|) (_ bv1 1))) (= (store .cse1 |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1)) |c_#valid|) (not (= |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 32))) (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base|) (_ bv0 1)))))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32)))) is different from true [2022-12-14 06:07:44,526 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 06:07:44,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:07:45,354 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 23 treesize of output 21 [2022-12-14 06:08:04,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1366541062] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:08:04,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275265576] [2022-12-14 06:08:04,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:04,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:08:04,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:08:04,170 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:08:04,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-12-14 06:08:04,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:04,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 06:08:04,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:08:04,386 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 15 treesize of output 11 [2022-12-14 06:08:04,469 INFO L321 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-12-14 06:08:04,470 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 36 treesize of output 33 [2022-12-14 06:08:04,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:08:04,553 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2022-12-14 06:08:16,015 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 06:08:16,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:08:30,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275265576] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:08:30,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:08:30,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 32 [2022-12-14 06:08:30,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906392081] [2022-12-14 06:08:30,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:08:30,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 06:08:30,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:08:30,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 06:08:30,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=3227, Unknown=23, NotChecked=354, Total=3906 [2022-12-14 06:08:30,572 INFO L87 Difference]: Start difference. First operand 113 states and 132 transitions. Second operand has 33 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 06:08:38,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:08:38,190 INFO L93 Difference]: Finished difference Result 118 states and 136 transitions. [2022-12-14 06:08:38,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 06:08:38,190 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 40 [2022-12-14 06:08:38,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:08:38,191 INFO L225 Difference]: With dead ends: 118 [2022-12-14 06:08:38,191 INFO L226 Difference]: Without dead ends: 101 [2022-12-14 06:08:38,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 128 SyntacticMatches, 6 SemanticMatches, 75 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 1458 ImplicationChecksByTransitivity, 74.0s TimeCoverageRelationStatistics Valid=525, Invalid=4866, Unknown=23, NotChecked=438, Total=5852 [2022-12-14 06:08:38,192 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 68 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 22 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:08:38,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 255 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 751 Invalid, 3 Unknown, 110 Unchecked, 1.6s Time] [2022-12-14 06:08:38,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-12-14 06:08:38,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-12-14 06:08:38,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 82 states have (on average 1.3048780487804879) internal successors, (107), 89 states have internal predecessors, (107), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-14 06:08:38,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 119 transitions. [2022-12-14 06:08:38,195 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 119 transitions. Word has length 40 [2022-12-14 06:08:38,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:08:38,195 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 119 transitions. [2022-12-14 06:08:38,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.1) internal successors, (63), 29 states have internal predecessors, (63), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 06:08:38,195 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 119 transitions. [2022-12-14 06:08:38,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 06:08:38,195 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:08:38,195 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:08:38,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-12-14 06:08:38,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Ended with exit code 0 [2022-12-14 06:08:38,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2022-12-14 06:08:38,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 06:08:38,797 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:08:38,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:08:38,799 INFO L85 PathProgramCache]: Analyzing trace with hash -419710261, now seen corresponding path program 1 times [2022-12-14 06:08:38,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:08:38,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1234401455] [2022-12-14 06:08:38,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:38,801 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:08:38,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:08:38,802 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:08:38,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-12-14 06:08:38,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:38,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 06:08:38,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:08:38,944 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:08:38,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:08:39,052 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:08:39,052 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:08:39,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1234401455] [2022-12-14 06:08:39,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1234401455] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:08:39,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2008789180] [2022-12-14 06:08:39,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:39,052 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:08:39,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:08:39,053 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:08:39,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-12-14 06:08:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:39,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 06:08:39,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:08:39,237 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:08:39,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:08:39,288 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:08:39,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2008789180] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:08:39,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602378295] [2022-12-14 06:08:39,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:39,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:08:39,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:08:39,289 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:08:39,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-12-14 06:08:39,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:39,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 06:08:39,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:08:39,394 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:08:39,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:08:39,448 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:08:39,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602378295] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:08:39,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 06:08:39,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2022-12-14 06:08:39,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322907513] [2022-12-14 06:08:39,449 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 06:08:39,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 06:08:39,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:08:39,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 06:08:39,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-12-14 06:08:39,450 INFO L87 Difference]: Start difference. First operand 101 states and 119 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 06:08:39,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:08:39,704 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2022-12-14 06:08:39,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 06:08:39,705 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 44 [2022-12-14 06:08:39,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:08:39,706 INFO L225 Difference]: With dead ends: 114 [2022-12-14 06:08:39,706 INFO L226 Difference]: Without dead ends: 114 [2022-12-14 06:08:39,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-12-14 06:08:39,707 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 130 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:08:39,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 181 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:08:39,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-12-14 06:08:39,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 100. [2022-12-14 06:08:39,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 81 states have (on average 1.271604938271605) internal successors, (103), 88 states have internal predecessors, (103), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-14 06:08:39,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 115 transitions. [2022-12-14 06:08:39,711 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 115 transitions. Word has length 44 [2022-12-14 06:08:39,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:08:39,711 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 115 transitions. [2022-12-14 06:08:39,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 06:08:39,711 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 115 transitions. [2022-12-14 06:08:39,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 06:08:39,712 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:08:39,712 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:08:39,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (52)] Ended with exit code 0 [2022-12-14 06:08:39,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-12-14 06:08:40,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Ended with exit code 0 [2022-12-14 06:08:40,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:08:40,314 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:08:40,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:08:40,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1236217923, now seen corresponding path program 1 times [2022-12-14 06:08:40,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:08:40,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1875749445] [2022-12-14 06:08:40,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:40,316 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:08:40,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:08:40,319 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:08:40,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-12-14 06:08:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:40,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 06:08:40,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:08:40,624 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 06:08:40,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:08:40,852 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 34 treesize of output 30 [2022-12-14 06:08:41,711 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 06:08:41,712 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:08:41,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1875749445] [2022-12-14 06:08:41,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1875749445] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:08:41,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1772950095] [2022-12-14 06:08:41,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:41,712 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:08:41,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:08:41,713 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:08:41,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-12-14 06:08:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:41,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 06:08:41,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:08:41,996 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 06:08:41,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:08:42,068 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 34 treesize of output 30 [2022-12-14 06:08:42,371 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 06:08:42,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1772950095] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:08:42,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887905958] [2022-12-14 06:08:42,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:42,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:08:42,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:08:42,372 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:08:42,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-12-14 06:08:42,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:42,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 06:08:42,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:08:42,588 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 06:08:42,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:08:42,671 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 34 treesize of output 30 [2022-12-14 06:08:42,982 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 06:08:42,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887905958] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:08:42,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 06:08:42,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 17 [2022-12-14 06:08:42,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468817636] [2022-12-14 06:08:42,983 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 06:08:42,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 06:08:42,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:08:42,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 06:08:42,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-12-14 06:08:42,984 INFO L87 Difference]: Start difference. First operand 100 states and 115 transitions. Second operand has 18 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-14 06:08:46,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:08:46,837 INFO L93 Difference]: Finished difference Result 208 states and 218 transitions. [2022-12-14 06:08:46,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 06:08:46,838 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 46 [2022-12-14 06:08:46,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:08:46,839 INFO L225 Difference]: With dead ends: 208 [2022-12-14 06:08:46,839 INFO L226 Difference]: Without dead ends: 208 [2022-12-14 06:08:46,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=203, Invalid=853, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 06:08:46,840 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 333 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:08:46,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 359 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 06:08:46,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-12-14 06:08:46,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 100. [2022-12-14 06:08:46,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 81 states have (on average 1.2469135802469136) internal successors, (101), 88 states have internal predecessors, (101), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-14 06:08:46,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 113 transitions. [2022-12-14 06:08:46,844 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 113 transitions. Word has length 46 [2022-12-14 06:08:46,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:08:46,845 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 113 transitions. [2022-12-14 06:08:46,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-14 06:08:46,845 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 113 transitions. [2022-12-14 06:08:46,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 06:08:46,845 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:08:46,846 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:08:46,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (55)] Ended with exit code 0 [2022-12-14 06:08:47,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-12-14 06:08:47,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Ended with exit code 0 [2022-12-14 06:08:47,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:08:47,448 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:08:47,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:08:47,449 INFO L85 PathProgramCache]: Analyzing trace with hash -519500702, now seen corresponding path program 3 times [2022-12-14 06:08:47,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:08:47,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [583236024] [2022-12-14 06:08:47,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:08:47,450 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:08:47,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:08:47,453 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:08:47,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-12-14 06:08:47,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 06:08:47,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:08:47,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-14 06:08:47,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:08:47,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:08:47,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:08:47,743 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_712 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_712))))) is different from true [2022-12-14 06:08:47,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:08:47,759 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 12 treesize of output 14 [2022-12-14 06:08:47,772 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:08:47,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:08:47,894 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_713 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_713) |c_#length|)))) is different from true [2022-12-14 06:08:47,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:08:47,911 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 12 treesize of output 14 [2022-12-14 06:08:47,923 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:08:47,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:08:48,045 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_714 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_714))))) is different from true [2022-12-14 06:08:48,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:08:48,061 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 12 treesize of output 14 [2022-12-14 06:08:48,073 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:08:48,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:08:48,185 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_715 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_715) |c_#length|)))) is different from true [2022-12-14 06:08:48,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:08:48,199 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 12 treesize of output 14 [2022-12-14 06:08:48,208 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:08:48,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:08:48,255 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 12 trivial. 20 not checked. [2022-12-14 06:08:48,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:08:48,710 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:08:48,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [583236024] [2022-12-14 06:08:48,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [583236024] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:08:48,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [326919317] [2022-12-14 06:08:48,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:08:48,710 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:08:48,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:08:48,711 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:08:48,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-12-14 06:08:48,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 06:08:48,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:08:48,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 06:08:48,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:08:49,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:08:49,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:08:49,170 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 06:08:49,170 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 12 treesize of output 18 [2022-12-14 06:08:49,188 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:08:49,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:08:49,389 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 06:08:49,390 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 12 treesize of output 18 [2022-12-14 06:08:49,414 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:08:49,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:08:49,595 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_753 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_753) |c_#length|)))) is different from true [2022-12-14 06:08:49,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:08:49,615 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 12 treesize of output 14 [2022-12-14 06:08:49,625 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:08:49,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:08:49,709 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_754 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_754) |c_#length|)))) is different from true [2022-12-14 06:08:49,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:08:49,726 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 12 treesize of output 14 [2022-12-14 06:08:49,738 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:08:49,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:08:49,763 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 4 proven. 41 refuted. 0 times theorem prover too weak. 14 trivial. 14 not checked. [2022-12-14 06:08:49,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:08:50,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [326919317] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:08:50,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757703811] [2022-12-14 06:08:50,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:08:50,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:08:50,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:08:50,079 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:08:50,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-12-14 06:08:50,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 06:08:50,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:08:50,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-14 06:08:50,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:08:50,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:08:50,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:08:50,313 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_788 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_788) |c_#length|)))) is different from true [2022-12-14 06:08:50,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:08:50,331 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 12 treesize of output 14 [2022-12-14 06:08:50,345 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:08:50,346 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 13 treesize of output 13 [2022-12-14 06:08:50,425 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_789 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_789))))) is different from true [2022-12-14 06:08:50,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:08:50,442 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 12 treesize of output 14 [2022-12-14 06:08:50,457 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:08:50,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:08:50,532 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_790 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_790) |c_#length|)))) is different from true [2022-12-14 06:08:50,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:08:50,549 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 12 treesize of output 14 [2022-12-14 06:08:50,562 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:08:50,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:08:50,638 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_791 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_791) |c_#length|)))) is different from true [2022-12-14 06:08:50,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:08:50,654 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 12 treesize of output 14 [2022-12-14 06:08:50,669 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:08:50,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:08:50,691 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 12 trivial. 20 not checked. [2022-12-14 06:08:50,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:08:53,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757703811] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:08:53,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:08:53,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 18] total 29 [2022-12-14 06:08:53,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624953400] [2022-12-14 06:08:53,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:08:53,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-14 06:08:53,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:08:53,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-14 06:08:53,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=407, Unknown=10, NotChecked=490, Total=992 [2022-12-14 06:08:53,157 INFO L87 Difference]: Start difference. First operand 100 states and 113 transitions. Second operand has 30 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 5 states have call successors, (5), 2 states have call predecessors, (5), 12 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2022-12-14 06:08:54,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:08:54,821 INFO L93 Difference]: Finished difference Result 148 states and 158 transitions. [2022-12-14 06:08:54,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 06:08:54,821 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 5 states have call successors, (5), 2 states have call predecessors, (5), 12 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) Word has length 48 [2022-12-14 06:08:54,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:08:54,822 INFO L225 Difference]: With dead ends: 148 [2022-12-14 06:08:54,822 INFO L226 Difference]: Without dead ends: 148 [2022-12-14 06:08:54,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 120 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=176, Invalid=1114, Unknown=10, NotChecked=770, Total=2070 [2022-12-14 06:08:54,823 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 146 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 16 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 1712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 880 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:08:54,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 393 Invalid, 1712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 812 Invalid, 4 Unknown, 880 Unchecked, 1.0s Time] [2022-12-14 06:08:54,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-12-14 06:08:54,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 115. [2022-12-14 06:08:54,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 95 states have (on average 1.2210526315789474) internal successors, (116), 101 states have internal predecessors, (116), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2022-12-14 06:08:54,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 131 transitions. [2022-12-14 06:08:54,825 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 131 transitions. Word has length 48 [2022-12-14 06:08:54,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:08:54,825 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 131 transitions. [2022-12-14 06:08:54,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 27 states have internal predecessors, (55), 5 states have call successors, (5), 2 states have call predecessors, (5), 12 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2022-12-14 06:08:54,826 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 131 transitions. [2022-12-14 06:08:54,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 06:08:54,826 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:08:54,826 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:08:54,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Ended with exit code 0 [2022-12-14 06:08:55,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (58)] Forceful destruction successful, exit code 0 [2022-12-14 06:08:55,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-12-14 06:08:55,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:08:55,428 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:08:55,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:08:55,429 INFO L85 PathProgramCache]: Analyzing trace with hash 331950041, now seen corresponding path program 1 times [2022-12-14 06:08:55,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:08:55,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [879023422] [2022-12-14 06:08:55,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:55,431 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:08:55,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:08:55,433 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:08:55,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-12-14 06:08:55,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:55,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 06:08:55,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:08:55,640 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 15 treesize of output 11 [2022-12-14 06:08:55,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:08:55,775 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 23 treesize of output 22 [2022-12-14 06:08:55,991 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 [2022-12-14 06:08:56,011 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 06:08:56,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:08:56,415 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 06:08:56,415 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:08:56,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [879023422] [2022-12-14 06:08:56,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [879023422] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:08:56,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1582174798] [2022-12-14 06:08:56,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:56,416 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:08:56,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:08:56,417 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:08:56,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2022-12-14 06:08:56,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:56,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 06:08:56,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:08:56,638 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 15 treesize of output 11 [2022-12-14 06:08:56,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:08:56,732 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 23 treesize of output 22 [2022-12-14 06:08:56,876 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 [2022-12-14 06:08:56,878 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 06:08:56,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:08:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 06:08:57,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1582174798] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:08:57,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505075957] [2022-12-14 06:08:57,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:08:57,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:08:57,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:08:57,001 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:08:57,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-12-14 06:08:57,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:08:57,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 06:08:57,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:08:57,133 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 15 treesize of output 11 [2022-12-14 06:08:57,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:08:57,231 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 23 treesize of output 22 [2022-12-14 06:08:57,359 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 [2022-12-14 06:08:57,361 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 06:08:57,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:08:57,481 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 06:08:57,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505075957] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:08:57,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 06:08:57,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 13, 10, 13, 10] total 20 [2022-12-14 06:08:57,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117436304] [2022-12-14 06:08:57,482 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 06:08:57,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 06:08:57,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:08:57,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 06:08:57,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-12-14 06:08:57,483 INFO L87 Difference]: Start difference. First operand 115 states and 131 transitions. Second operand has 21 states, 20 states have (on average 3.05) internal successors, (61), 18 states have internal predecessors, (61), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-12-14 06:09:00,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:09:01,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:09:01,420 INFO L93 Difference]: Finished difference Result 154 states and 170 transitions. [2022-12-14 06:09:01,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 06:09:01,421 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.05) internal successors, (61), 18 states have internal predecessors, (61), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 47 [2022-12-14 06:09:01,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:09:01,422 INFO L225 Difference]: With dead ends: 154 [2022-12-14 06:09:01,422 INFO L226 Difference]: Without dead ends: 154 [2022-12-14 06:09:01,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 249 SyntacticMatches, 11 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=290, Invalid=1780, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 06:09:01,423 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 339 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:09:01,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 258 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-12-14 06:09:01,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-12-14 06:09:01,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 117. [2022-12-14 06:09:01,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 97 states have (on average 1.2164948453608246) internal successors, (118), 103 states have internal predecessors, (118), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2022-12-14 06:09:01,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 133 transitions. [2022-12-14 06:09:01,425 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 133 transitions. Word has length 47 [2022-12-14 06:09:01,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:09:01,425 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 133 transitions. [2022-12-14 06:09:01,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.05) internal successors, (61), 18 states have internal predecessors, (61), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-12-14 06:09:01,426 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 133 transitions. [2022-12-14 06:09:01,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 06:09:01,426 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:09:01,426 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:09:01,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-12-14 06:09:01,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Ended with exit code 0 [2022-12-14 06:09:01,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (61)] Ended with exit code 0 [2022-12-14 06:09:02,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 06:09:02,028 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:09:02,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:09:02,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1700516764, now seen corresponding path program 1 times [2022-12-14 06:09:02,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:09:02,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [683755918] [2022-12-14 06:09:02,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:09:02,030 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:09:02,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:09:02,033 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:09:02,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-12-14 06:09:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:09:02,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 06:09:02,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:09:02,255 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 15 treesize of output 11 [2022-12-14 06:09:02,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:09:02,442 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 23 treesize of output 22 [2022-12-14 06:09:02,761 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 [2022-12-14 06:09:02,800 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 06:09:02,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:09:03,375 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 06:09:03,375 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:09:03,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [683755918] [2022-12-14 06:09:03,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [683755918] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:09:03,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2146138154] [2022-12-14 06:09:03,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:09:03,375 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:09:03,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:09:03,376 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:09:03,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2022-12-14 06:09:03,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:09:03,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 06:09:03,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:09:03,691 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 15 treesize of output 11 [2022-12-14 06:09:03,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:09:03,828 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 23 treesize of output 22 [2022-12-14 06:09:04,038 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 [2022-12-14 06:09:04,043 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 06:09:04,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:09:04,206 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 06:09:04,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2146138154] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:09:04,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000162987] [2022-12-14 06:09:04,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:09:04,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:09:04,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:09:04,207 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:09:04,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-12-14 06:09:04,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:09:04,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 06:09:04,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:09:04,366 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 15 treesize of output 11 [2022-12-14 06:09:04,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:09:04,516 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 23 treesize of output 22 [2022-12-14 06:09:04,717 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 [2022-12-14 06:09:04,722 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 06:09:04,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:09:04,865 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 06:09:04,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000162987] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:09:04,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 06:09:04,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 14, 10, 14, 10] total 21 [2022-12-14 06:09:04,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978127767] [2022-12-14 06:09:04,866 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 06:09:04,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 06:09:04,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:09:04,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 06:09:04,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-12-14 06:09:04,867 INFO L87 Difference]: Start difference. First operand 117 states and 133 transitions. Second operand has 22 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 19 states have internal predecessors, (64), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-12-14 06:09:08,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:09:10,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:09:11,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:09:11,808 INFO L93 Difference]: Finished difference Result 152 states and 167 transitions. [2022-12-14 06:09:11,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 06:09:11,810 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 19 states have internal predecessors, (64), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 48 [2022-12-14 06:09:11,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:09:11,810 INFO L225 Difference]: With dead ends: 152 [2022-12-14 06:09:11,810 INFO L226 Difference]: Without dead ends: 152 [2022-12-14 06:09:11,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 254 SyntacticMatches, 11 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=268, Invalid=1624, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 06:09:11,811 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 313 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-12-14 06:09:11,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 226 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 709 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2022-12-14 06:09:11,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-12-14 06:09:11,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 119. [2022-12-14 06:09:11,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 99 states have (on average 1.2121212121212122) internal successors, (120), 105 states have internal predecessors, (120), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2022-12-14 06:09:11,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 135 transitions. [2022-12-14 06:09:11,815 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 135 transitions. Word has length 48 [2022-12-14 06:09:11,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:09:11,815 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 135 transitions. [2022-12-14 06:09:11,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 19 states have internal predecessors, (64), 6 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-12-14 06:09:11,815 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 135 transitions. [2022-12-14 06:09:11,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 06:09:11,815 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:09:11,815 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:09:11,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Ended with exit code 0 [2022-12-14 06:09:12,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-12-14 06:09:12,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (64)] Forceful destruction successful, exit code 0 [2022-12-14 06:09:12,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 06:09:12,418 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:09:12,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:09:12,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1176412219, now seen corresponding path program 1 times [2022-12-14 06:09:12,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:09:12,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [854032551] [2022-12-14 06:09:12,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:09:12,422 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:09:12,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:09:12,425 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:09:12,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-12-14 06:09:12,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:09:12,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 06:09:12,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:09:12,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:09:12,641 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 15 treesize of output 11 [2022-12-14 06:09:12,721 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 11 treesize of output 5 [2022-12-14 06:09:12,793 INFO L321 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-12-14 06:09:12,794 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 23 treesize of output 35 [2022-12-14 06:09:12,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:09:12,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 30 [2022-12-14 06:09:13,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 5 [2022-12-14 06:09:13,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:09:13,387 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 26 treesize of output 32 [2022-12-14 06:09:13,483 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:09:13,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2022-12-14 06:09:13,524 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:09:13,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:09:14,160 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:09:14,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [854032551] [2022-12-14 06:09:14,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [854032551] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:09:14,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1345837185] [2022-12-14 06:09:14,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:09:14,161 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:09:14,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:09:14,162 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:09:14,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2022-12-14 06:09:14,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:09:14,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 06:09:14,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:09:14,376 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 [2022-12-14 06:09:14,411 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 15 treesize of output 11 [2022-12-14 06:09:14,457 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 11 treesize of output 5 [2022-12-14 06:09:14,513 INFO L321 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-12-14 06:09:14,514 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 23 treesize of output 35 [2022-12-14 06:09:14,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:09:14,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 30 [2022-12-14 06:09:14,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 5 [2022-12-14 06:09:14,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:09:14,844 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 26 treesize of output 32 [2022-12-14 06:09:14,883 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:09:14,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2022-12-14 06:09:14,889 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:09:14,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:09:15,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1345837185] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:09:15,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170444946] [2022-12-14 06:09:15,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:09:15,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:09:15,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:09:15,101 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:09:15,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-12-14 06:09:15,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:09:15,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 06:09:15,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:09:15,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:09:15,247 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 15 treesize of output 11 [2022-12-14 06:09:15,274 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 11 treesize of output 5 [2022-12-14 06:09:15,328 INFO L321 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-12-14 06:09:15,328 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 23 treesize of output 35 [2022-12-14 06:09:15,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:09:15,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 30 [2022-12-14 06:09:15,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 5 [2022-12-14 06:09:15,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:09:15,649 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 26 treesize of output 32 [2022-12-14 06:09:15,686 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:09:15,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2022-12-14 06:09:15,691 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:09:15,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:09:15,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170444946] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:09:15,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:09:15,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 20 [2022-12-14 06:09:15,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229833319] [2022-12-14 06:09:15,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:09:15,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 06:09:15,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:09:15,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 06:09:15,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=583, Unknown=1, NotChecked=0, Total=650 [2022-12-14 06:09:15,903 INFO L87 Difference]: Start difference. First operand 119 states and 135 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 18 states have internal predecessors, (40), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 06:09:17,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:09:17,329 INFO L93 Difference]: Finished difference Result 123 states and 139 transitions. [2022-12-14 06:09:17,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 06:09:17,330 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 18 states have internal predecessors, (40), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 49 [2022-12-14 06:09:17,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:09:17,331 INFO L225 Difference]: With dead ends: 123 [2022-12-14 06:09:17,331 INFO L226 Difference]: Without dead ends: 123 [2022-12-14 06:09:17,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 154 SyntacticMatches, 11 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=122, Invalid=1067, Unknown=1, NotChecked=0, Total=1190 [2022-12-14 06:09:17,332 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 17 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:09:17,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 352 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 06:09:17,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-12-14 06:09:17,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-12-14 06:09:17,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 103 states have (on average 1.203883495145631) internal successors, (124), 109 states have internal predecessors, (124), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2022-12-14 06:09:17,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 139 transitions. [2022-12-14 06:09:17,335 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 139 transitions. Word has length 49 [2022-12-14 06:09:17,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:09:17,336 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 139 transitions. [2022-12-14 06:09:17,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 18 states have internal predecessors, (40), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 06:09:17,336 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 139 transitions. [2022-12-14 06:09:17,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 06:09:17,337 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:09:17,337 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:09:17,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Ended with exit code 0 [2022-12-14 06:09:17,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-12-14 06:09:17,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (67)] Ended with exit code 0 [2022-12-14 06:09:17,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 06:09:17,938 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:09:17,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:09:17,939 INFO L85 PathProgramCache]: Analyzing trace with hash -486793996, now seen corresponding path program 2 times [2022-12-14 06:09:17,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:09:17,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705006813] [2022-12-14 06:09:17,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 06:09:17,940 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:09:17,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:09:17,943 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:09:17,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-12-14 06:09:18,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 06:09:18,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:09:18,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 06:09:18,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:09:18,235 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 06:09:18,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:09:18,530 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 06:09:18,530 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:09:18,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705006813] [2022-12-14 06:09:18,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [705006813] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:09:18,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1247599426] [2022-12-14 06:09:18,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 06:09:18,530 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:09:18,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:09:18,531 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:09:18,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2022-12-14 06:09:18,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 06:09:18,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:09:18,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 06:09:18,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:09:18,824 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 06:09:18,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:09:18,927 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 06:09:18,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1247599426] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:09:18,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839200564] [2022-12-14 06:09:18,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 06:09:18,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:09:18,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:09:18,928 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:09:18,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-12-14 06:09:19,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 06:09:19,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:09:19,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 06:09:19,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:09:19,122 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 06:09:19,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:09:19,204 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 06:09:19,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839200564] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:09:19,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 06:09:19,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 14 [2022-12-14 06:09:19,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778576803] [2022-12-14 06:09:19,205 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 06:09:19,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 06:09:19,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:09:19,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 06:09:19,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-12-14 06:09:19,206 INFO L87 Difference]: Start difference. First operand 123 states and 139 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 06:09:19,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:09:19,693 INFO L93 Difference]: Finished difference Result 369 states and 398 transitions. [2022-12-14 06:09:19,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 06:09:19,693 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 52 [2022-12-14 06:09:19,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:09:19,696 INFO L225 Difference]: With dead ends: 369 [2022-12-14 06:09:19,696 INFO L226 Difference]: Without dead ends: 369 [2022-12-14 06:09:19,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=211, Unknown=0, NotChecked=0, Total=342 [2022-12-14 06:09:19,696 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 882 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:09:19,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [883 Valid, 522 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:09:19,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-12-14 06:09:19,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 155. [2022-12-14 06:09:19,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 130 states have (on average 1.2) internal successors, (156), 136 states have internal predecessors, (156), 11 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (19), 14 states have call predecessors, (19), 11 states have call successors, (19) [2022-12-14 06:09:19,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 186 transitions. [2022-12-14 06:09:19,702 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 186 transitions. Word has length 52 [2022-12-14 06:09:19,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:09:19,702 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 186 transitions. [2022-12-14 06:09:19,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 06:09:19,703 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 186 transitions. [2022-12-14 06:09:19,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 06:09:19,703 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:09:19,703 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:09:19,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (70)] Ended with exit code 0 [2022-12-14 06:09:19,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-12-14 06:09:20,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-12-14 06:09:20,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:09:20,305 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:09:20,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:09:20,307 INFO L85 PathProgramCache]: Analyzing trace with hash -436631103, now seen corresponding path program 2 times [2022-12-14 06:09:20,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:09:20,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1639868043] [2022-12-14 06:09:20,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 06:09:20,308 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:09:20,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:09:20,310 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:09:20,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-12-14 06:09:20,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 06:09:20,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:09:20,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 06:09:20,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:09:20,547 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:09:20,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:09:20,738 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:09:20,738 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:09:20,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1639868043] [2022-12-14 06:09:20,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1639868043] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:09:20,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2057932576] [2022-12-14 06:09:20,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 06:09:20,739 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:09:20,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:09:20,740 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:09:20,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (73)] Waiting until timeout for monitored process [2022-12-14 06:09:20,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 06:09:20,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:09:20,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 06:09:20,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:09:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:09:21,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:09:21,089 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:09:21,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2057932576] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:09:21,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150873394] [2022-12-14 06:09:21,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 06:09:21,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:09:21,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:09:21,090 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:09:21,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-12-14 06:09:21,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 06:09:21,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:09:21,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 06:09:21,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:09:21,232 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:09:21,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:09:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:09:21,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150873394] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:09:21,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 06:09:21,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 9] total 19 [2022-12-14 06:09:21,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896041698] [2022-12-14 06:09:21,666 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 06:09:21,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 06:09:21,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:09:21,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 06:09:21,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-12-14 06:09:21,667 INFO L87 Difference]: Start difference. First operand 155 states and 186 transitions. Second operand has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 19 states have internal predecessors, (88), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 06:09:21,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:09:21,986 INFO L93 Difference]: Finished difference Result 167 states and 196 transitions. [2022-12-14 06:09:21,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 06:09:21,987 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 19 states have internal predecessors, (88), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 52 [2022-12-14 06:09:21,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:09:21,988 INFO L225 Difference]: With dead ends: 167 [2022-12-14 06:09:21,988 INFO L226 Difference]: Without dead ends: 167 [2022-12-14 06:09:21,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-12-14 06:09:21,988 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 71 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:09:21,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 374 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 06:09:21,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-12-14 06:09:21,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 157. [2022-12-14 06:09:21,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 132 states have (on average 1.196969696969697) internal successors, (158), 138 states have internal predecessors, (158), 11 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (19), 14 states have call predecessors, (19), 11 states have call successors, (19) [2022-12-14 06:09:21,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 188 transitions. [2022-12-14 06:09:21,991 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 188 transitions. Word has length 52 [2022-12-14 06:09:21,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:09:21,992 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 188 transitions. [2022-12-14 06:09:21,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 19 states have internal predecessors, (88), 10 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 06:09:21,992 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 188 transitions. [2022-12-14 06:09:21,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 06:09:21,992 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:09:21,992 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:09:21,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (73)] Ended with exit code 0 [2022-12-14 06:09:22,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-12-14 06:09:22,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Ended with exit code 0 [2022-12-14 06:09:22,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:09:22,593 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:09:22,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:09:22,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1304261010, now seen corresponding path program 2 times [2022-12-14 06:09:22,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:09:22,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [815063438] [2022-12-14 06:09:22,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 06:09:22,594 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:09:22,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:09:22,594 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:09:22,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-12-14 06:09:22,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 06:09:22,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:09:22,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 06:09:22,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:09:22,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:09:22,792 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:09:22,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:09:22,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 06:09:24,943 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_125| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_145| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_125|) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_145|) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_125|))) is different from true [2022-12-14 06:09:25,013 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-12-14 06:09:25,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 24 treesize of output 23 [2022-12-14 06:09:27,065 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_126| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_146| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_126|) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_146|) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_126|))) is different from true [2022-12-14 06:09:27,251 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 [2022-12-14 06:09:27,306 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 14 treesize of output 20 [2022-12-14 06:09:27,347 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 16 not checked. [2022-12-14 06:09:27,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:09:27,479 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 46 treesize of output 42 [2022-12-14 06:09:28,273 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 06:09:28,273 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:09:28,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [815063438] [2022-12-14 06:09:28,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [815063438] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:09:28,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [400471619] [2022-12-14 06:09:28,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 06:09:28,274 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:09:28,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:09:28,275 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:09:28,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (76)] Waiting until timeout for monitored process [2022-12-14 06:09:28,435 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:09:28,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751353493] [2022-12-14 06:09:28,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 06:09:28,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:09:28,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:09:28,436 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:09:28,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (76)] Forceful destruction successful, exit code 1 [2022-12-14 06:09:28,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-12-14 06:09:28,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 06:09:28,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:09:28,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 06:09:28,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:09:28,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:09:28,596 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:09:28,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:09:28,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 06:09:30,642 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_149| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_131| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_131| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_131|) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_149|)))) is different from true [2022-12-14 06:09:30,726 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-12-14 06:09:30,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 24 treesize of output 23 [2022-12-14 06:09:32,753 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_150| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_132| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_132| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_132|) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_150|)))) is different from true [2022-12-14 06:09:32,882 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-12-14 06:09:32,882 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 11 [2022-12-14 06:09:32,958 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 14 treesize of output 20 [2022-12-14 06:09:33,076 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 16 not checked. [2022-12-14 06:09:33,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:09:33,364 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 46 treesize of output 42 [2022-12-14 06:09:34,980 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 06:09:34,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751353493] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:09:34,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-12-14 06:09:34,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 19, 19] total 44 [2022-12-14 06:09:34,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843005129] [2022-12-14 06:09:34,981 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-12-14 06:09:34,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-14 06:09:34,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:09:34,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-14 06:09:34,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1457, Unknown=4, NotChecked=324, Total=1980 [2022-12-14 06:09:34,983 INFO L87 Difference]: Start difference. First operand 157 states and 188 transitions. Second operand has 45 states, 44 states have (on average 2.772727272727273) internal successors, (122), 41 states have internal predecessors, (122), 10 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-12-14 06:09:57,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 06:09:59,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 06:10:10,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 06:10:12,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 06:10:18,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:10:18,591 INFO L93 Difference]: Finished difference Result 204 states and 229 transitions. [2022-12-14 06:10:18,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-12-14 06:10:18,593 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.772727272727273) internal successors, (122), 41 states have internal predecessors, (122), 10 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 54 [2022-12-14 06:10:18,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:10:18,593 INFO L225 Difference]: With dead ends: 204 [2022-12-14 06:10:18,593 INFO L226 Difference]: Without dead ends: 204 [2022-12-14 06:10:18,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 161 SyntacticMatches, 10 SemanticMatches, 109 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 2965 ImplicationChecksByTransitivity, 43.5s TimeCoverageRelationStatistics Valid=1780, Invalid=9570, Unknown=8, NotChecked=852, Total=12210 [2022-12-14 06:10:18,595 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 684 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 106 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 1768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 436 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2022-12-14 06:10:18,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 413 Invalid, 1768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1222 Invalid, 4 Unknown, 436 Unchecked, 10.6s Time] [2022-12-14 06:10:18,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-12-14 06:10:18,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 163. [2022-12-14 06:10:18,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 138 states have (on average 1.2173913043478262) internal successors, (168), 144 states have internal predecessors, (168), 11 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (19), 14 states have call predecessors, (19), 11 states have call successors, (19) [2022-12-14 06:10:18,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 198 transitions. [2022-12-14 06:10:18,598 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 198 transitions. Word has length 54 [2022-12-14 06:10:18,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:10:18,599 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 198 transitions. [2022-12-14 06:10:18,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.772727272727273) internal successors, (122), 41 states have internal predecessors, (122), 10 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-12-14 06:10:18,599 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 198 transitions. [2022-12-14 06:10:18,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 06:10:18,599 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:10:18,599 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:10:18,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-12-14 06:10:18,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Ended with exit code 0 [2022-12-14 06:10:19,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:10:19,001 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:10:19,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:10:19,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1952504247, now seen corresponding path program 4 times [2022-12-14 06:10:19,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:10:19,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1375311922] [2022-12-14 06:10:19,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:10:19,003 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:10:19,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:10:19,006 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:10:19,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-12-14 06:10:19,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:10:19,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:10:19,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-14 06:10:19,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:10:19,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:10:19,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:10:19,350 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1285 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1285) |c_#length|)))) is different from true [2022-12-14 06:10:19,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:10:19,367 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 12 treesize of output 14 [2022-12-14 06:10:19,376 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:10:19,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:10:19,470 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1286 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1286) |c_#length|)))) is different from true [2022-12-14 06:10:19,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:10:19,491 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 12 treesize of output 14 [2022-12-14 06:10:19,501 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:10:19,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:10:19,617 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1287 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1287) |c_#length|)))) is different from true [2022-12-14 06:10:19,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:10:19,635 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 12 treesize of output 14 [2022-12-14 06:10:19,648 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:10:19,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:10:19,765 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1288 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1288) |c_#length|)))) is different from true [2022-12-14 06:10:19,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:10:19,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 06:10:19,793 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:10:19,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:10:19,916 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1289 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1289) |c_#length|)))) is different from true [2022-12-14 06:10:19,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:10:19,930 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 12 treesize of output 14 [2022-12-14 06:10:19,940 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:10:19,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:10:19,983 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 20 trivial. 30 not checked. [2022-12-14 06:10:19,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:10:20,457 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:10:20,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1375311922] [2022-12-14 06:10:20,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1375311922] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:10:20,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [741780807] [2022-12-14 06:10:20,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:10:20,457 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:10:20,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:10:20,458 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:10:20,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (79)] Waiting until timeout for monitored process [2022-12-14 06:10:20,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:10:20,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:10:20,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-14 06:10:20,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:10:20,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:10:20,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:10:20,817 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1331 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1331) |c_#length|)))) is different from true [2022-12-14 06:10:20,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:10:20,835 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 12 treesize of output 14 [2022-12-14 06:10:20,850 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:10:20,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:10:20,929 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1332 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1332))))) is different from true [2022-12-14 06:10:20,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:10:20,948 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 12 treesize of output 14 [2022-12-14 06:10:20,961 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:10:20,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:10:21,024 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1333 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1333) |c_#length|)))) is different from true [2022-12-14 06:10:21,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:10:21,044 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 12 treesize of output 14 [2022-12-14 06:10:21,057 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:10:21,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:10:21,127 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1334 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1334))))) is different from true [2022-12-14 06:10:21,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:10:21,146 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 12 treesize of output 14 [2022-12-14 06:10:21,159 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:10:21,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:10:21,228 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_1335 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1335) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-12-14 06:10:21,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:10:21,243 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 12 treesize of output 14 [2022-12-14 06:10:21,253 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:10:21,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:10:21,274 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 20 trivial. 30 not checked. [2022-12-14 06:10:21,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:10:23,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [741780807] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:10:23,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894343845] [2022-12-14 06:10:23,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:10:23,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:10:23,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:10:23,564 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:10:23,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-12-14 06:10:23,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:10:23,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:10:23,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 53 conjunts are in the unsatisfiable core [2022-12-14 06:10:23,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:10:23,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:10:23,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:10:23,758 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1377 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1377) |c_#length|)))) is different from true [2022-12-14 06:10:23,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:10:23,771 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 12 treesize of output 14 [2022-12-14 06:10:23,780 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:10:23,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:10:23,847 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1378 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1378) |c_#length|)))) is different from true [2022-12-14 06:10:23,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:10:23,860 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 12 treesize of output 14 [2022-12-14 06:10:23,869 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:10:23,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:10:23,940 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_1379 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1379))) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-12-14 06:10:23,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:10:23,957 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 12 treesize of output 14 [2022-12-14 06:10:23,970 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:10:23,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:10:24,040 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1380 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1380) |c_#length|)))) is different from true [2022-12-14 06:10:24,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:10:24,054 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 12 treesize of output 14 [2022-12-14 06:10:24,068 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:10:24,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:10:24,141 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_1381 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1381) |c_#length|)))) is different from true [2022-12-14 06:10:24,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:10:24,156 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 12 treesize of output 14 [2022-12-14 06:10:24,167 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:10:24,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:10:24,183 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 20 trivial. 30 not checked. [2022-12-14 06:10:24,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:10:24,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894343845] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:10:24,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:10:24,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 31 [2022-12-14 06:10:24,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756503211] [2022-12-14 06:10:24,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:10:24,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 06:10:24,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:10:24,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 06:10:24,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=302, Unknown=15, NotChecked=720, Total=1122 [2022-12-14 06:10:24,486 INFO L87 Difference]: Start difference. First operand 163 states and 198 transitions. Second operand has 32 states, 30 states have (on average 2.066666666666667) internal successors, (62), 31 states have internal predecessors, (62), 6 states have call successors, (6), 2 states have call predecessors, (6), 16 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-12-14 06:10:26,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:10:26,047 INFO L93 Difference]: Finished difference Result 219 states and 249 transitions. [2022-12-14 06:10:26,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 06:10:26,048 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.066666666666667) internal successors, (62), 31 states have internal predecessors, (62), 6 states have call successors, (6), 2 states have call predecessors, (6), 16 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 58 [2022-12-14 06:10:26,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:10:26,049 INFO L225 Difference]: With dead ends: 219 [2022-12-14 06:10:26,049 INFO L226 Difference]: Without dead ends: 219 [2022-12-14 06:10:26,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 149 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 15 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=162, Invalid=875, Unknown=15, NotChecked=1110, Total=2162 [2022-12-14 06:10:26,049 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 210 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 2286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1642 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 06:10:26,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 430 Invalid, 2286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 623 Invalid, 0 Unknown, 1642 Unchecked, 0.8s Time] [2022-12-14 06:10:26,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-12-14 06:10:26,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 163. [2022-12-14 06:10:26,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 138 states have (on average 1.210144927536232) internal successors, (167), 144 states have internal predecessors, (167), 11 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (19), 14 states have call predecessors, (19), 11 states have call successors, (19) [2022-12-14 06:10:26,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 197 transitions. [2022-12-14 06:10:26,052 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 197 transitions. Word has length 58 [2022-12-14 06:10:26,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:10:26,052 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 197 transitions. [2022-12-14 06:10:26,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.066666666666667) internal successors, (62), 31 states have internal predecessors, (62), 6 states have call successors, (6), 2 states have call predecessors, (6), 16 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-12-14 06:10:26,053 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 197 transitions. [2022-12-14 06:10:26,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 06:10:26,053 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:10:26,053 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:10:26,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (79)] Forceful destruction successful, exit code 0 [2022-12-14 06:10:26,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Ended with exit code 0 [2022-12-14 06:10:26,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-12-14 06:10:26,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:10:26,655 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:10:26,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:10:26,655 INFO L85 PathProgramCache]: Analyzing trace with hash -735616619, now seen corresponding path program 2 times [2022-12-14 06:10:26,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:10:26,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [598762218] [2022-12-14 06:10:26,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 06:10:26,657 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:10:26,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:10:26,659 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:10:26,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-12-14 06:10:26,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 06:10:26,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:10:26,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-14 06:10:26,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:10:27,026 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 15 treesize of output 11 [2022-12-14 06:10:27,176 INFO L321 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-12-14 06:10:27,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2022-12-14 06:10:37,550 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-12-14 06:10:37,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 59 treesize of output 50 [2022-12-14 06:10:37,783 INFO L321 Elim1Store]: treesize reduction 46, result has 9.8 percent of original size [2022-12-14 06:10:37,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 211 treesize of output 192 [2022-12-14 06:10:51,970 WARN L233 SmtUtils]: Spent 10.05s on a formula simplification. DAG size of input: 22 DAG size of output: 18 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:10:52,811 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:10:52,811 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 35 [2022-12-14 06:10:55,388 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:10:55,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:11:08,092 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:11:08,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [598762218] [2022-12-14 06:11:08,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [598762218] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:11:08,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [453206877] [2022-12-14 06:11:08,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 06:11:08,093 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:11:08,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:11:08,094 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:11:08,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (82)] Waiting until timeout for monitored process [2022-12-14 06:11:08,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 06:11:08,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:11:08,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-14 06:11:08,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:11:13,162 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 15 treesize of output 11 [2022-12-14 06:11:13,610 INFO L321 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2022-12-14 06:11:13,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2022-12-14 06:11:22,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 74 treesize of output 55 [2022-12-14 06:11:23,336 INFO L321 Elim1Store]: treesize reduction 90, result has 1.1 percent of original size [2022-12-14 06:11:23,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 45 [2022-12-14 06:11:25,282 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:11:25,282 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 35 [2022-12-14 06:11:27,880 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_entry_point_~array~0#1.base| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_#t~mem42#1.base_79| (_ BitVec 32)) (v_arrayElimCell_253 (_ BitVec 32))) (let ((.cse1 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv1 1)))) (let ((.cse0 (store .cse1 |v_ULTIMATE.start_entry_point_#t~mem42#1.base_79| (_ bv1 1)))) (and (= (select .cse0 v_arrayElimCell_253) (_ bv0 1)) (= |c_#valid| (store (store (store .cse0 v_arrayElimCell_253 (_ bv0 1)) |v_ULTIMATE.start_entry_point_#t~mem42#1.base_79| (_ bv0 1)) |ULTIMATE.start_entry_point_~array~0#1.base| (_ bv0 1))) (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~array~0#1.base|) (_ bv0 1)) (= (_ bv0 1) (select .cse1 |v_ULTIMATE.start_entry_point_#t~mem42#1.base_79|)))))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32)))) is different from true [2022-12-14 06:11:27,896 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 06:11:27,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:11:38,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [453206877] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:11:38,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700237605] [2022-12-14 06:11:38,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 06:11:38,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:11:38,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:11:38,733 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:11:38,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-12-14 06:11:38,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 06:11:38,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:11:38,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-14 06:11:38,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:11:39,324 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 15 treesize of output 11 [2022-12-14 06:11:39,753 INFO L321 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-12-14 06:11:39,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2022-12-14 06:11:48,472 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-12-14 06:11:48,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 59 treesize of output 50 [2022-12-14 06:11:51,136 INFO L321 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-12-14 06:11:51,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 42 [2022-12-14 06:11:55,145 INFO L321 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2022-12-14 06:11:55,145 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 38 [2022-12-14 06:12:28,904 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 06:12:28,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:12:39,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700237605] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:12:39,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:12:39,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 26] total 62 [2022-12-14 06:12:39,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292054410] [2022-12-14 06:12:39,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:12:39,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-12-14 06:12:39,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:12:39,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-12-14 06:12:39,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=570, Invalid=7240, Unknown=26, NotChecked=174, Total=8010 [2022-12-14 06:12:39,971 INFO L87 Difference]: Start difference. First operand 163 states and 197 transitions. Second operand has 63 states, 60 states have (on average 1.95) internal successors, (117), 55 states have internal predecessors, (117), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2022-12-14 06:12:42,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:12:44,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:12:50,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:12:52,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:12:56,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:12:58,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:13:00,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:13:07,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:13:09,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:13:11,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:13:13,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:13:15,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:13:17,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:13:20,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:14:08,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:14:10,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:14:12,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:14:22,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:14:24,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:14:26,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:14:27,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:14:27,361 INFO L93 Difference]: Finished difference Result 168 states and 201 transitions. [2022-12-14 06:14:27,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 06:14:27,361 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 60 states have (on average 1.95) internal successors, (117), 55 states have internal predecessors, (117), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 56 [2022-12-14 06:14:27,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:14:27,362 INFO L225 Difference]: With dead ends: 168 [2022-12-14 06:14:27,362 INFO L226 Difference]: Without dead ends: 145 [2022-12-14 06:14:27,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 163 SyntacticMatches, 10 SemanticMatches, 113 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4203 ImplicationChecksByTransitivity, 189.3s TimeCoverageRelationStatistics Valid=939, Invalid=11909, Unknown=38, NotChecked=224, Total=13110 [2022-12-14 06:14:27,363 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 103 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 1688 mSolverCounterSat, 29 mSolverCounterUnsat, 27 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 1811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1688 IncrementalHoareTripleChecker+Invalid, 27 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 47.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:14:27,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 525 Invalid, 1811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1688 Invalid, 27 Unknown, 67 Unchecked, 47.0s Time] [2022-12-14 06:14:27,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-12-14 06:14:27,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2022-12-14 06:14:27,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 119 states have (on average 1.2352941176470589) internal successors, (147), 126 states have internal predecessors, (147), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (18), 13 states have call predecessors, (18), 11 states have call successors, (18) [2022-12-14 06:14:27,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 176 transitions. [2022-12-14 06:14:27,367 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 176 transitions. Word has length 56 [2022-12-14 06:14:27,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:14:27,367 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 176 transitions. [2022-12-14 06:14:27,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 60 states have (on average 1.95) internal successors, (117), 55 states have internal predecessors, (117), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2022-12-14 06:14:27,368 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 176 transitions. [2022-12-14 06:14:27,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 06:14:27,368 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:14:27,368 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:14:27,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-12-14 06:14:27,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Ended with exit code 0 [2022-12-14 06:14:27,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (82)] Ended with exit code 0 [2022-12-14 06:14:27,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 06:14:27,971 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:14:27,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:14:27,972 INFO L85 PathProgramCache]: Analyzing trace with hash 499154310, now seen corresponding path program 2 times [2022-12-14 06:14:27,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:14:27,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [768743186] [2022-12-14 06:14:27,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 06:14:27,973 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:14:27,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:14:27,976 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:14:27,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-12-14 06:14:28,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 06:14:28,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:14:28,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 06:14:28,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:14:28,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:14:28,361 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 15 treesize of output 11 [2022-12-14 06:14:28,461 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 11 treesize of output 5 [2022-12-14 06:14:28,551 INFO L321 Elim1Store]: treesize reduction 49, result has 38.0 percent of original size [2022-12-14 06:14:28,551 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 28 treesize of output 45 [2022-12-14 06:14:28,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-12-14 06:14:28,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 5 [2022-12-14 06:14:29,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:14:29,298 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 34 [2022-12-14 06:14:29,407 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:14:29,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2022-12-14 06:14:29,459 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 06:14:29,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:14:30,287 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:14:30,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [768743186] [2022-12-14 06:14:30,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [768743186] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:14:30,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1020199734] [2022-12-14 06:14:30,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 06:14:30,287 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:14:30,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:14:30,288 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:14:30,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (85)] Waiting until timeout for monitored process [2022-12-14 06:14:30,486 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:14:30,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522895480] [2022-12-14 06:14:30,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 06:14:30,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:14:30,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:14:30,487 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:14:30,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-12-14 06:14:30,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (85)] Ended with exit code 1 [2022-12-14 06:14:30,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 06:14:30,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:14:30,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-14 06:14:30,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:14:30,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:14:31,084 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 15 treesize of output 11 [2022-12-14 06:14:31,318 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 11 treesize of output 5 [2022-12-14 06:14:31,388 INFO L321 Elim1Store]: treesize reduction 49, result has 38.0 percent of original size [2022-12-14 06:14:31,388 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 28 treesize of output 45 [2022-12-14 06:14:31,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-12-14 06:14:32,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 5 [2022-12-14 06:14:32,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:14:32,271 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 34 [2022-12-14 06:14:32,315 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:14:32,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2022-12-14 06:14:32,323 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 06:14:32,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:14:33,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522895480] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:14:33,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:14:33,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 33 [2022-12-14 06:14:33,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820429313] [2022-12-14 06:14:33,429 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:14:33,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 06:14:33,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:14:33,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 06:14:33,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1810, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 06:14:33,430 INFO L87 Difference]: Start difference. First operand 143 states and 176 transitions. Second operand has 34 states, 32 states have (on average 2.0625) internal successors, (66), 28 states have internal predecessors, (66), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 06:14:35,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:14:35,320 INFO L93 Difference]: Finished difference Result 161 states and 194 transitions. [2022-12-14 06:14:35,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 06:14:35,321 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.0625) internal successors, (66), 28 states have internal predecessors, (66), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 59 [2022-12-14 06:14:35,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:14:35,321 INFO L225 Difference]: With dead ends: 161 [2022-12-14 06:14:35,321 INFO L226 Difference]: Without dead ends: 161 [2022-12-14 06:14:35,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 101 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=256, Invalid=2606, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 06:14:35,322 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 50 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:14:35,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 434 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 881 Invalid, 1 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 06:14:35,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-12-14 06:14:35,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-12-14 06:14:35,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 136 states have (on average 1.213235294117647) internal successors, (165), 142 states have internal predecessors, (165), 11 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2022-12-14 06:14:35,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 194 transitions. [2022-12-14 06:14:35,324 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 194 transitions. Word has length 59 [2022-12-14 06:14:35,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:14:35,325 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 194 transitions. [2022-12-14 06:14:35,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.0625) internal successors, (66), 28 states have internal predecessors, (66), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 06:14:35,325 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 194 transitions. [2022-12-14 06:14:35,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-14 06:14:35,325 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:14:35,325 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:14:35,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Forceful destruction successful, exit code 0 [2022-12-14 06:14:35,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-12-14 06:14:35,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:14:35,727 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:14:35,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:14:35,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1129358486, now seen corresponding path program 3 times [2022-12-14 06:14:35,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:14:35,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627033778] [2022-12-14 06:14:35,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:14:35,729 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:14:35,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:14:35,731 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:14:35,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2022-12-14 06:14:36,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 06:14:36,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:14:36,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 06:14:36,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:14:36,109 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:14:36,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:14:36,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 06:14:38,451 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_185| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_168| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_272| (_ BitVec 32))) (and (bvslt |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_272| (_ bv10 32)) (bvslt (bvadd |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_272| (_ bv4294967295 32)) (_ bv10 32)) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_168| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_168|) (bvadd (_ bv4294967292 32) (bvmul (_ bv4 32) |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_272|) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_185|)))))) is different from true [2022-12-14 06:14:38,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 29 treesize of output 28 [2022-12-14 06:14:40,958 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_169| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_186| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_273| (_ BitVec 32))) (and (bvslt (bvadd |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_273| (_ bv4294967294 32)) (_ bv10 32)) (bvslt |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_273| (_ bv10 32)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_169|) (bvadd (bvmul (_ bv4 32) |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_273|) (_ bv4294967288 32) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_186|)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_169|)))) is different from true [2022-12-14 06:14:41,695 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 24 treesize of output 8 [2022-12-14 06:14:41,819 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 14 treesize of output 20 [2022-12-14 06:14:42,045 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 35 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 12 not checked. [2022-12-14 06:14:42,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:14:42,310 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 46 treesize of output 42 [2022-12-14 06:14:45,367 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:14:45,367 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:14:45,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627033778] [2022-12-14 06:14:45,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627033778] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:14:45,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1500276517] [2022-12-14 06:14:45,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:14:45,367 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:14:45,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:14:45,368 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:14:45,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (88)] Waiting until timeout for monitored process [2022-12-14 06:14:45,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 06:14:45,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:14:45,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 06:14:45,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:14:45,782 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:14:45,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:14:45,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 06:14:47,874 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_278| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_174| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_189| (_ BitVec 32))) (and (bvslt (bvadd |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_278| (_ bv4294967295 32)) (_ bv10 32)) (bvslt |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_278| (_ bv10 32)) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_174|) (bvadd (bvmul (_ bv4 32) |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_278|) (_ bv4294967292 32) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_189|)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_174|)))) is different from true [2022-12-14 06:14:54,504 INFO L321 Elim1Store]: treesize reduction 51, result has 36.3 percent of original size [2022-12-14 06:14:54,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 42 treesize of output 61 [2022-12-14 06:14:56,604 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_190| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_279| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_175| (_ BitVec 32))) (and (bvslt |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_279| (_ bv10 32)) (not (= |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_175| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_175|) (bvadd (bvmul (_ bv4 32) |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_279|) (_ bv4294967288 32) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_190|)))) (bvslt (bvadd |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_279| (_ bv4294967294 32)) (_ bv10 32)))) is different from true [2022-12-14 06:14:57,057 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 24 treesize of output 8 [2022-12-14 06:14:57,179 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 14 treesize of output 20 [2022-12-14 06:14:57,187 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 35 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 12 not checked. [2022-12-14 06:14:57,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:14:57,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-14 06:15:01,056 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 06:15:01,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1500276517] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:15:01,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658736695] [2022-12-14 06:15:01,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:15:01,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:15:01,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:15:01,057 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:15:01,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-12-14 06:15:01,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 06:15:01,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:15:01,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 06:15:01,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:15:01,416 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:15:01,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:15:01,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 06:15:02,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 06:15:11,010 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:15:11,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:15:12,845 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 29 treesize of output 28 [2022-12-14 06:15:17,848 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_194| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_181| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_285| (_ BitVec 32))) (let ((.cse0 (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_181|)) (.cse1 (bvmul (_ bv4 32) |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_285|))) (and (not (= (select .cse0 (bvadd .cse1 (_ bv4294967288 32) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_194|)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_181|)) (bvslt (bvadd |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_285| (_ bv4294967294 32)) (_ bv10 32)) (bvslt |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_285| (_ bv10 32)) (not (= (select .cse0 (bvadd (_ bv4294967292 32) .cse1 |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_194|)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_181|))))) is different from true [2022-12-14 06:15:19,837 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:15:19,837 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 12 [2022-12-14 06:15:19,897 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 14 treesize of output 20 [2022-12-14 06:15:19,929 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 45 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 8 not checked. [2022-12-14 06:15:19,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:15:20,085 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 46 treesize of output 42 [2022-12-14 06:15:20,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658736695] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:15:20,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 5 imperfect interpolant sequences. [2022-12-14 06:15:20,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 22, 18, 27] total 72 [2022-12-14 06:15:20,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84524805] [2022-12-14 06:15:20,813 INFO L85 oduleStraightlineAll]: Using 5 imperfect interpolants to construct interpolant automaton [2022-12-14 06:15:20,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-12-14 06:15:20,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:15:20,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-12-14 06:15:20,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=4275, Unknown=9, NotChecked=690, Total=5402 [2022-12-14 06:15:20,816 INFO L87 Difference]: Start difference. First operand 161 states and 194 transitions. Second operand has 73 states, 69 states have (on average 2.1884057971014492) internal successors, (151), 69 states have internal predecessors, (151), 13 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (17), 14 states have call predecessors, (17), 13 states have call successors, (17) [2022-12-14 06:15:23,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:15:25,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:15:27,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:15:31,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 06:15:33,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:15:35,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:15:37,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:15:40,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:15:43,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:15:45,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:16:06,329 WARN L233 SmtUtils]: Spent 8.17s on a formula simplification. DAG size of input: 62 DAG size of output: 34 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 06:16:50,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:16:50,607 INFO L93 Difference]: Finished difference Result 193 states and 224 transitions. [2022-12-14 06:16:50,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-14 06:16:50,609 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 69 states have (on average 2.1884057971014492) internal successors, (151), 69 states have internal predecessors, (151), 13 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (17), 14 states have call predecessors, (17), 13 states have call successors, (17) Word has length 62 [2022-12-14 06:16:50,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:16:50,609 INFO L225 Difference]: With dead ends: 193 [2022-12-14 06:16:50,609 INFO L226 Difference]: Without dead ends: 193 [2022-12-14 06:16:50,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 255 SyntacticMatches, 9 SemanticMatches, 113 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 4060 ImplicationChecksByTransitivity, 102.1s TimeCoverageRelationStatistics Valid=1703, Invalid=10289, Unknown=18, NotChecked=1100, Total=13110 [2022-12-14 06:16:50,610 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 577 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 83 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 1986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 473 IncrementalHoareTripleChecker+Unchecked, 25.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:16:50,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [577 Valid, 446 Invalid, 1986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1420 Invalid, 10 Unknown, 473 Unchecked, 25.0s Time] [2022-12-14 06:16:50,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-12-14 06:16:50,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 167. [2022-12-14 06:16:50,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 141 states have (on average 1.2198581560283688) internal successors, (172), 147 states have internal predecessors, (172), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2022-12-14 06:16:50,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 201 transitions. [2022-12-14 06:16:50,614 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 201 transitions. Word has length 62 [2022-12-14 06:16:50,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:16:50,614 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 201 transitions. [2022-12-14 06:16:50,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 69 states have (on average 2.1884057971014492) internal successors, (151), 69 states have internal predecessors, (151), 13 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (17), 14 states have call predecessors, (17), 13 states have call successors, (17) [2022-12-14 06:16:50,614 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 201 transitions. [2022-12-14 06:16:50,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-14 06:16:50,616 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:16:50,616 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:16:50,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Ended with exit code 0 [2022-12-14 06:16:50,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-12-14 06:16:51,023 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (88)] Ended with exit code 0 [2022-12-14 06:16:51,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 06:16:51,218 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:16:51,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:16:51,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1129358487, now seen corresponding path program 2 times [2022-12-14 06:16:51,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:16:51,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [472806597] [2022-12-14 06:16:51,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 06:16:51,221 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:16:51,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:16:51,224 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:16:51,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-12-14 06:16:51,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 06:16:51,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:16:51,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 06:16:51,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:16:51,724 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 06:16:51,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:16:52,524 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 36 treesize of output 32 [2022-12-14 06:16:54,619 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 06:16:54,620 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:16:54,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [472806597] [2022-12-14 06:16:54,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [472806597] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:16:54,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1970027417] [2022-12-14 06:16:54,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 06:16:54,620 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:16:54,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:16:54,621 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:16:54,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (91)] Waiting until timeout for monitored process [2022-12-14 06:16:54,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 06:16:54,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:16:54,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 06:16:54,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:16:55,057 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 06:16:55,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:16:55,642 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 36 treesize of output 32 [2022-12-14 06:16:57,224 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 06:16:57,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1970027417] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:16:57,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723197759] [2022-12-14 06:16:57,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 06:16:57,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:16:57,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:16:57,225 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:16:57,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-12-14 06:16:57,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 06:16:57,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:16:57,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 06:16:57,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:16:58,118 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 06:16:58,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:16:58,316 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 36 treesize of output 32 [2022-12-14 06:17:01,751 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 06:17:01,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723197759] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:17:01,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 06:17:01,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11, 11, 13, 13] total 42 [2022-12-14 06:17:01,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121846199] [2022-12-14 06:17:01,752 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 06:17:01,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-14 06:17:01,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:17:01,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-14 06:17:01,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1590, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 06:17:01,753 INFO L87 Difference]: Start difference. First operand 167 states and 201 transitions. Second operand has 43 states, 41 states have (on average 3.7804878048780486) internal successors, (155), 39 states have internal predecessors, (155), 21 states have call successors, (21), 1 states have call predecessors, (21), 3 states have return successors, (23), 23 states have call predecessors, (23), 21 states have call successors, (23) [2022-12-14 06:17:34,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:17:34,186 INFO L93 Difference]: Finished difference Result 381 states and 397 transitions. [2022-12-14 06:17:34,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-14 06:17:34,187 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 3.7804878048780486) internal successors, (155), 39 states have internal predecessors, (155), 21 states have call successors, (21), 1 states have call predecessors, (21), 3 states have return successors, (23), 23 states have call predecessors, (23), 21 states have call successors, (23) Word has length 62 [2022-12-14 06:17:34,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:17:34,188 INFO L225 Difference]: With dead ends: 381 [2022-12-14 06:17:34,188 INFO L226 Difference]: Without dead ends: 381 [2022-12-14 06:17:34,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 323 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2019 ImplicationChecksByTransitivity, 32.3s TimeCoverageRelationStatistics Valid=1397, Invalid=5913, Unknown=0, NotChecked=0, Total=7310 [2022-12-14 06:17:34,189 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 2284 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2285 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:17:34,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2285 Valid, 856 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1110 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-12-14 06:17:34,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-12-14 06:17:34,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 188. [2022-12-14 06:17:34,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 162 states have (on average 1.271604938271605) internal successors, (206), 168 states have internal predecessors, (206), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2022-12-14 06:17:34,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 235 transitions. [2022-12-14 06:17:34,193 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 235 transitions. Word has length 62 [2022-12-14 06:17:34,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:17:34,193 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 235 transitions. [2022-12-14 06:17:34,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 3.7804878048780486) internal successors, (155), 39 states have internal predecessors, (155), 21 states have call successors, (21), 1 states have call predecessors, (21), 3 states have return successors, (23), 23 states have call predecessors, (23), 21 states have call successors, (23) [2022-12-14 06:17:34,193 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 235 transitions. [2022-12-14 06:17:34,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 06:17:34,193 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:17:34,194 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:17:34,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (91)] Forceful destruction successful, exit code 0 [2022-12-14 06:17:34,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-12-14 06:17:34,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Ended with exit code 0 [2022-12-14 06:17:34,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:17:34,796 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:17:34,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:17:34,796 INFO L85 PathProgramCache]: Analyzing trace with hash 650374719, now seen corresponding path program 2 times [2022-12-14 06:17:34,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:17:34,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1132168198] [2022-12-14 06:17:34,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 06:17:34,797 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:17:34,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:17:34,798 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:17:34,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2022-12-14 06:17:35,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 06:17:35,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:17:35,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 06:17:35,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:17:35,111 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 15 treesize of output 11 [2022-12-14 06:17:35,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:17:35,254 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 23 treesize of output 22 [2022-12-14 06:17:35,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:17:35,389 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 23 treesize of output 22 [2022-12-14 06:17:35,684 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 [2022-12-14 06:17:35,704 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 54 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 06:17:35,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:17:36,838 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 06:17:36,838 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:17:36,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1132168198] [2022-12-14 06:17:36,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1132168198] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:17:36,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [326371896] [2022-12-14 06:17:36,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 06:17:36,838 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:17:36,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:17:36,839 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:17:36,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (94)] Waiting until timeout for monitored process [2022-12-14 06:17:37,127 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:17:37,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526921813] [2022-12-14 06:17:37,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 06:17:37,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:17:37,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:17:37,128 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:17:37,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-12-14 06:17:37,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (94)] Ended with exit code 1 [2022-12-14 06:17:37,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 06:17:37,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:17:37,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 06:17:37,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:17:37,572 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 15 treesize of output 11 [2022-12-14 06:17:37,884 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 28 treesize of output 27 [2022-12-14 06:17:38,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:17:38,134 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 23 treesize of output 22 [2022-12-14 06:17:38,379 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 [2022-12-14 06:17:38,381 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 54 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 06:17:38,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:17:40,669 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 06:17:40,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526921813] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:17:40,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-12-14 06:17:40,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 17, 15] total 45 [2022-12-14 06:17:40,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318912036] [2022-12-14 06:17:40,669 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-12-14 06:17:40,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-14 06:17:40,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:17:40,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-14 06:17:40,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1855, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 06:17:40,671 INFO L87 Difference]: Start difference. First operand 188 states and 235 transitions. Second operand has 46 states, 44 states have (on average 3.022727272727273) internal successors, (133), 40 states have internal predecessors, (133), 15 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (18), 18 states have call predecessors, (18), 15 states have call successors, (18) [2022-12-14 06:17:47,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:17:49,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:18:03,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:18:06,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 06:18:08,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 06:18:12,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:18:14,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 06:18:16,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 06:18:21,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:18:25,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:18:25,552 INFO L93 Difference]: Finished difference Result 298 states and 315 transitions. [2022-12-14 06:18:25,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-12-14 06:18:25,552 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 3.022727272727273) internal successors, (133), 40 states have internal predecessors, (133), 15 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (18), 18 states have call predecessors, (18), 15 states have call successors, (18) Word has length 63 [2022-12-14 06:18:25,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:18:25,553 INFO L225 Difference]: With dead ends: 298 [2022-12-14 06:18:25,553 INFO L226 Difference]: Without dead ends: 298 [2022-12-14 06:18:25,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 197 SyntacticMatches, 12 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3753 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=1701, Invalid=10071, Unknown=0, NotChecked=0, Total=11772 [2022-12-14 06:18:25,554 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 1825 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 1637 mSolverCounterSat, 76 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1825 SdHoareTripleChecker+Valid, 708 SdHoareTripleChecker+Invalid, 1722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1637 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:18:25,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1825 Valid, 708 Invalid, 1722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1637 Invalid, 9 Unknown, 0 Unchecked, 21.4s Time] [2022-12-14 06:18:25,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-12-14 06:18:25,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 196. [2022-12-14 06:18:25,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 168 states have (on average 1.25) internal successors, (210), 175 states have internal predecessors, (210), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2022-12-14 06:18:25,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 239 transitions. [2022-12-14 06:18:25,557 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 239 transitions. Word has length 63 [2022-12-14 06:18:25,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:18:25,557 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 239 transitions. [2022-12-14 06:18:25,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 3.022727272727273) internal successors, (133), 40 states have internal predecessors, (133), 15 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (18), 18 states have call predecessors, (18), 15 states have call successors, (18) [2022-12-14 06:18:25,557 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 239 transitions. [2022-12-14 06:18:25,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-14 06:18:25,558 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:18:25,558 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:18:25,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-12-14 06:18:25,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Ended with exit code 0 [2022-12-14 06:18:25,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:18:25,960 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:18:25,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:18:25,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1313220106, now seen corresponding path program 2 times [2022-12-14 06:18:25,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:18:25,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147937365] [2022-12-14 06:18:25,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 06:18:25,962 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:18:25,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:18:25,965 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:18:25,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2022-12-14 06:18:26,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 06:18:26,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:18:26,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 06:18:26,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:18:26,508 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 15 treesize of output 11 [2022-12-14 06:18:26,746 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 28 treesize of output 27 [2022-12-14 06:18:26,952 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 28 treesize of output 27 [2022-12-14 06:18:27,492 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 [2022-12-14 06:18:27,541 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 58 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 06:18:27,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:18:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 06:18:28,909 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:18:28,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147937365] [2022-12-14 06:18:28,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147937365] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:18:28,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1133818594] [2022-12-14 06:18:28,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 06:18:28,909 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:18:28,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:18:28,910 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:18:28,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (97)] Waiting until timeout for monitored process [2022-12-14 06:18:29,125 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:18:29,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349180941] [2022-12-14 06:18:29,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 06:18:29,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:18:29,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:18:29,126 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:18:29,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-12-14 06:18:29,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (97)] Ended with exit code 1 [2022-12-14 06:18:29,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 06:18:29,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:18:29,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 06:18:29,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:18:29,732 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 15 treesize of output 11 [2022-12-14 06:18:30,177 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 28 treesize of output 27 [2022-12-14 06:18:30,602 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 28 treesize of output 27 [2022-12-14 06:18:31,033 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 [2022-12-14 06:18:31,041 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 58 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 06:18:31,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:18:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 06:18:33,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349180941] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:18:33,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-12-14 06:18:33,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 18, 15] total 46 [2022-12-14 06:18:33,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101619595] [2022-12-14 06:18:33,931 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-12-14 06:18:33,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-12-14 06:18:33,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:18:33,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-12-14 06:18:33,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1945, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 06:18:33,932 INFO L87 Difference]: Start difference. First operand 196 states and 239 transitions. Second operand has 47 states, 45 states have (on average 3.022222222222222) internal successors, (136), 41 states have internal predecessors, (136), 15 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (18), 18 states have call predecessors, (18), 15 states have call successors, (18) [2022-12-14 06:18:36,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:18:45,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:18:47,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:19:07,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:19:09,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 06:19:11,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 06:19:16,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:19:18,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 06:19:20,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 06:19:24,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:19:29,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:19:33,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:19:35,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 06:19:37,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:19:37,704 INFO L93 Difference]: Finished difference Result 292 states and 309 transitions. [2022-12-14 06:19:37,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-12-14 06:19:37,704 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 3.022222222222222) internal successors, (136), 41 states have internal predecessors, (136), 15 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (18), 18 states have call predecessors, (18), 15 states have call successors, (18) Word has length 64 [2022-12-14 06:19:37,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:19:37,705 INFO L225 Difference]: With dead ends: 292 [2022-12-14 06:19:37,705 INFO L226 Difference]: Without dead ends: 292 [2022-12-14 06:19:37,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 200 SyntacticMatches, 13 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3741 ImplicationChecksByTransitivity, 36.3s TimeCoverageRelationStatistics Valid=1643, Invalid=9699, Unknown=0, NotChecked=0, Total=11342 [2022-12-14 06:19:37,705 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1933 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 1956 mSolverCounterSat, 79 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1933 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 2048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1956 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.3s IncrementalHoareTripleChecker+Time [2022-12-14 06:19:37,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1933 Valid, 545 Invalid, 2048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1956 Invalid, 13 Unknown, 0 Unchecked, 32.3s Time] [2022-12-14 06:19:37,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-12-14 06:19:37,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 198. [2022-12-14 06:19:37,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 170 states have (on average 1.2294117647058824) internal successors, (209), 177 states have internal predecessors, (209), 11 states have call successors, (11), 6 states have call predecessors, (11), 8 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2022-12-14 06:19:37,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 238 transitions. [2022-12-14 06:19:37,711 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 238 transitions. Word has length 64 [2022-12-14 06:19:37,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:19:37,711 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 238 transitions. [2022-12-14 06:19:37,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 3.022222222222222) internal successors, (136), 41 states have internal predecessors, (136), 15 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (18), 18 states have call predecessors, (18), 15 states have call successors, (18) [2022-12-14 06:19:37,711 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 238 transitions. [2022-12-14 06:19:37,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-14 06:19:37,712 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:19:37,712 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:19:37,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (96)] Forceful destruction successful, exit code 0 [2022-12-14 06:19:37,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-12-14 06:19:38,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:19:38,113 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:19:38,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:19:38,113 INFO L85 PathProgramCache]: Analyzing trace with hash -2055117535, now seen corresponding path program 3 times [2022-12-14 06:19:38,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:19:38,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [770220107] [2022-12-14 06:19:38,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:19:38,114 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:19:38,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:19:38,115 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:19:38,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (99)] Waiting until timeout for monitored process [2022-12-14 06:19:38,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 06:19:38,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:19:38,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-14 06:19:38,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:19:38,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:19:38,427 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 15 treesize of output 11 [2022-12-14 06:19:38,498 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 11 treesize of output 5 [2022-12-14 06:19:38,573 INFO L321 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-12-14 06:19:38,573 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 23 treesize of output 35 [2022-12-14 06:19:38,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:38,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 30 [2022-12-14 06:19:38,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 5 [2022-12-14 06:19:38,994 INFO L321 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-12-14 06:19:38,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 23 treesize of output 35 [2022-12-14 06:19:39,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:39,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:39,203 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:19:39,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 52 treesize of output 46 [2022-12-14 06:19:39,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 11 treesize of output 5 [2022-12-14 06:19:40,025 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 26 treesize of output 32 [2022-12-14 06:19:40,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:40,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 32 [2022-12-14 06:19:40,512 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:19:40,512 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 19 [2022-12-14 06:19:40,582 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:19:40,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:19:42,952 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:19:42,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [770220107] [2022-12-14 06:19:42,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [770220107] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:19:42,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1841349925] [2022-12-14 06:19:42,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:19:42,953 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:19:42,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:19:42,954 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:19:42,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (100)] Waiting until timeout for monitored process [2022-12-14 06:19:43,288 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 06:19:43,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796458732] [2022-12-14 06:19:43,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:19:43,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:19:43,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:19:43,290 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:19:43,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-12-14 06:19:43,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (100)] Ended with exit code 1 [2022-12-14 06:19:43,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 06:19:43,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:19:43,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-14 06:19:43,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:19:43,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:19:44,042 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 15 treesize of output 11 [2022-12-14 06:19:44,321 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 11 treesize of output 5 [2022-12-14 06:19:44,471 INFO L321 Elim1Store]: treesize reduction 49, result has 38.0 percent of original size [2022-12-14 06:19:44,471 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 28 treesize of output 45 [2022-12-14 06:19:44,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-12-14 06:19:45,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-12-14 06:19:45,417 INFO L321 Elim1Store]: treesize reduction 74, result has 36.8 percent of original size [2022-12-14 06:19:45,417 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 36 treesize of output 63 [2022-12-14 06:19:45,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:45,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:45,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:45,934 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:19:45,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 72 treesize of output 54 [2022-12-14 06:19:46,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 23 treesize of output 11 [2022-12-14 06:19:47,831 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 50 [2022-12-14 06:19:48,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 06:19:48,434 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 37 [2022-12-14 06:19:48,853 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:19:48,853 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 23 [2022-12-14 06:19:48,860 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 06:19:48,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:19:51,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796458732] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:19:51,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 06:19:51,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 31] total 52 [2022-12-14 06:19:51,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504237400] [2022-12-14 06:19:51,526 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 06:19:51,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-12-14 06:19:51,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:19:51,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-12-14 06:19:51,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=4713, Unknown=0, NotChecked=0, Total=5112 [2022-12-14 06:19:51,527 INFO L87 Difference]: Start difference. First operand 198 states and 238 transitions. Second operand has 53 states, 51 states have (on average 1.8627450980392157) internal successors, (95), 45 states have internal predecessors, (95), 10 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 06:19:55,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:19:55,958 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2022-12-14 06:19:55,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-14 06:19:55,959 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 51 states have (on average 1.8627450980392157) internal successors, (95), 45 states have internal predecessors, (95), 10 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 65 [2022-12-14 06:19:55,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:19:55,959 INFO L225 Difference]: With dead ends: 200 [2022-12-14 06:19:55,959 INFO L226 Difference]: Without dead ends: 200 [2022-12-14 06:19:55,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 96 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2671 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=631, Invalid=7025, Unknown=0, NotChecked=0, Total=7656 [2022-12-14 06:19:55,960 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 85 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 1493 mSolverCounterSat, 23 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 1522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1493 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-12-14 06:19:55,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 544 Invalid, 1522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1493 Invalid, 6 Unknown, 0 Unchecked, 2.7s Time] [2022-12-14 06:19:55,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-12-14 06:19:55,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2022-12-14 06:19:55,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 171 states have (on average 1.2222222222222223) internal successors, (209), 179 states have internal predecessors, (209), 11 states have call successors, (11), 6 states have call predecessors, (11), 9 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2022-12-14 06:19:55,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 238 transitions. [2022-12-14 06:19:55,962 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 238 transitions. Word has length 65 [2022-12-14 06:19:55,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:19:55,963 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 238 transitions. [2022-12-14 06:19:55,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 51 states have (on average 1.8627450980392157) internal successors, (95), 45 states have internal predecessors, (95), 10 states have call successors, (10), 5 states have call predecessors, (10), 7 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 06:19:55,963 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 238 transitions. [2022-12-14 06:19:55,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-14 06:19:55,963 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:19:55,963 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:19:55,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-12-14 06:19:56,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (99)] Ended with exit code 0 [2022-12-14 06:19:56,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:19:56,364 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:19:56,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:19:56,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1710505780, now seen corresponding path program 5 times [2022-12-14 06:19:56,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:19:56,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [99771045] [2022-12-14 06:19:56,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 06:19:56,365 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:19:56,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:19:56,366 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:19:56,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (102)] Waiting until timeout for monitored process [2022-12-14 06:19:56,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-12-14 06:19:56,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:19:56,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-14 06:19:56,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:19:56,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:19:56,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:19:56,845 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_2109 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_2109) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-12-14 06:19:56,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:56,866 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 12 treesize of output 14 [2022-12-14 06:19:56,877 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:19:56,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:19:57,001 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_2110 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_2110))) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-12-14 06:19:57,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:57,016 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 12 treesize of output 14 [2022-12-14 06:19:57,027 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:19:57,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:19:57,155 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_2111 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_2111) |c_#length|)))) is different from true [2022-12-14 06:19:57,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:57,169 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 12 treesize of output 14 [2022-12-14 06:19:57,178 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:19:57,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:19:57,303 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_2112 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_2112))) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-12-14 06:19:57,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:57,322 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 12 treesize of output 14 [2022-12-14 06:19:57,333 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:19:57,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:19:57,484 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_2113 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_2113))) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-12-14 06:19:57,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:57,501 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 12 treesize of output 14 [2022-12-14 06:19:57,512 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:19:57,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:19:57,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:19:57,719 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 12 treesize of output 14 [2022-12-14 06:19:57,732 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:19:57,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:19:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 6 proven. 93 refuted. 0 times theorem prover too weak. 30 trivial. 40 not checked. [2022-12-14 06:19:57,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:20:02,701 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:20:02,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [99771045] [2022-12-14 06:20:02,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [99771045] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:20:02,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [845287281] [2022-12-14 06:20:02,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 06:20:02,701 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:20:02,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:20:02,702 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:20:02,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (103)] Waiting until timeout for monitored process [2022-12-14 06:20:03,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-12-14 06:20:03,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:20:03,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-14 06:20:03,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:20:03,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:20:03,470 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 06:20:03,470 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 12 treesize of output 18 [2022-12-14 06:20:03,877 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_2165 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_2165) |c_#length|)))) is different from true [2022-12-14 06:20:03,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:20:03,915 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-12-14 06:20:03,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 31 [2022-12-14 06:20:03,930 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:20:03,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:20:04,115 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_2166 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_2166) |c_#length|)) (exists ((v_ArrVal_2167 (_ BitVec 1))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_2167) |c_#valid|)))) is different from true [2022-12-14 06:20:04,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:20:04,133 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 12 treesize of output 14 [2022-12-14 06:20:04,154 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:20:04,154 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 19 treesize of output 27 [2022-12-14 06:20:04,217 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_2168 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_2168))) (exists ((v_ArrVal_2169 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_2169) |c_#length|)))) is different from true [2022-12-14 06:20:04,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:20:04,236 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 12 treesize of output 14 [2022-12-14 06:20:04,257 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 06:20:04,257 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 19 treesize of output 27 [2022-12-14 06:20:04,326 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_2170 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_2170) |c_#length|)))) is different from true [2022-12-14 06:20:04,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:20:04,342 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 12 treesize of output 14 [2022-12-14 06:20:04,352 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:20:04,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:20:04,420 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_2171 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_2171) |c_#length|)))) is different from true [2022-12-14 06:20:04,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:20:04,434 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 12 treesize of output 14 [2022-12-14 06:20:04,447 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:20:04,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:20:04,465 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 12 proven. 97 refuted. 0 times theorem prover too weak. 20 trivial. 40 not checked. [2022-12-14 06:20:04,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:20:04,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [845287281] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:20:04,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013253497] [2022-12-14 06:20:04,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 06:20:04,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:20:04,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:20:04,916 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:20:04,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-12-14 06:20:05,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-12-14 06:20:05,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:20:05,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-14 06:20:05,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:20:05,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:20:05,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 06:20:05,505 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_2221 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_2221) |c_#length|)))) is different from true [2022-12-14 06:20:05,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:20:05,519 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 12 treesize of output 14 [2022-12-14 06:20:05,532 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:20:05,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:20:05,600 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_2222 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_2222) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-12-14 06:20:05,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:20:05,617 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 12 treesize of output 14 [2022-12-14 06:20:05,627 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:20:05,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:20:05,694 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_2223 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_2223) |c_#length|)))) is different from true [2022-12-14 06:20:05,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:20:05,716 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 12 treesize of output 14 [2022-12-14 06:20:05,730 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:20:05,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:20:05,796 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_2224 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_2224) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-12-14 06:20:05,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:20:05,810 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 12 treesize of output 14 [2022-12-14 06:20:05,826 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:20:05,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:20:05,898 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_2225 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_2225) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-12-14 06:20:05,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:20:05,916 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 12 treesize of output 14 [2022-12-14 06:20:05,932 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:20:05,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:20:06,009 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_2226 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_2226))))) is different from true [2022-12-14 06:20:06,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:20:06,026 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 12 treesize of output 14 [2022-12-14 06:20:06,037 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:20:06,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:20:06,059 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 6 proven. 91 refuted. 0 times theorem prover too weak. 30 trivial. 42 not checked. [2022-12-14 06:20:06,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:20:06,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013253497] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:20:06,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:20:06,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 27, 24] total 45 [2022-12-14 06:20:06,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229948398] [2022-12-14 06:20:06,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:20:06,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-12-14 06:20:06,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:20:06,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-12-14 06:20:06,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=910, Unknown=17, NotChecked=1200, Total=2256 [2022-12-14 06:20:06,528 INFO L87 Difference]: Start difference. First operand 200 states and 238 transitions. Second operand has 46 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 42 states have internal predecessors, (93), 9 states have call successors, (9), 3 states have call predecessors, (9), 20 states have return successors, (20), 12 states have call predecessors, (20), 9 states have call successors, (20) [2022-12-14 06:20:10,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:20:10,748 INFO L93 Difference]: Finished difference Result 273 states and 307 transitions. [2022-12-14 06:20:10,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 06:20:10,749 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 42 states have internal predecessors, (93), 9 states have call successors, (9), 3 states have call predecessors, (9), 20 states have return successors, (20), 12 states have call predecessors, (20), 9 states have call successors, (20) Word has length 68 [2022-12-14 06:20:10,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:20:10,749 INFO L225 Difference]: With dead ends: 273 [2022-12-14 06:20:10,749 INFO L226 Difference]: Without dead ends: 273 [2022-12-14 06:20:10,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 164 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 16 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=229, Invalid=1888, Unknown=17, NotChecked=1648, Total=3782 [2022-12-14 06:20:10,750 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 243 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 1485 mSolverCounterSat, 29 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 3521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1485 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 2000 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:20:10,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 834 Invalid, 3521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1485 Invalid, 7 Unknown, 2000 Unchecked, 2.0s Time] [2022-12-14 06:20:10,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-12-14 06:20:10,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 200. [2022-12-14 06:20:10,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 171 states have (on average 1.2163742690058479) internal successors, (208), 179 states have internal predecessors, (208), 11 states have call successors, (11), 6 states have call predecessors, (11), 9 states have return successors, (18), 14 states have call predecessors, (18), 11 states have call successors, (18) [2022-12-14 06:20:10,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 237 transitions. [2022-12-14 06:20:10,753 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 237 transitions. Word has length 68 [2022-12-14 06:20:10,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:20:10,753 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 237 transitions. [2022-12-14 06:20:10,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 42 states have internal predecessors, (93), 9 states have call successors, (9), 3 states have call predecessors, (9), 20 states have return successors, (20), 12 states have call predecessors, (20), 9 states have call successors, (20) [2022-12-14 06:20:10,753 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 237 transitions. [2022-12-14 06:20:10,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-12-14 06:20:10,753 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:20:10,753 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:20:10,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-12-14 06:20:11,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (102)] Ended with exit code 0 [2022-12-14 06:20:11,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (103)] Ended with exit code 0 [2022-12-14 06:20:11,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 06:20:11,356 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:20:11,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:20:11,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1385006831, now seen corresponding path program 4 times [2022-12-14 06:20:11,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:20:11,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [234847506] [2022-12-14 06:20:11,358 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:20:11,358 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:20:11,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:20:11,359 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:20:11,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (105)] Waiting until timeout for monitored process [2022-12-14 06:20:11,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:20:11,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:20:11,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 06:20:11,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:20:11,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:20:11,743 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 15 treesize of output 11 [2022-12-14 06:20:11,832 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 11 treesize of output 5 [2022-12-14 06:20:11,929 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-12-14 06:20:11,929 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 [2022-12-14 06:20:12,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:20:12,070 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 39 treesize of output 32 [2022-12-14 06:20:12,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 5 [2022-12-14 06:20:12,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:20:12,663 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 34 [2022-12-14 06:20:12,771 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:20:12,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2022-12-14 06:20:12,821 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 30 proven. 73 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 06:20:12,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:20:13,681 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:20:13,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [234847506] [2022-12-14 06:20:13,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [234847506] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:20:13,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1451877900] [2022-12-14 06:20:13,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:20:13,681 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:20:13,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:20:13,682 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:20:13,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (106)] Waiting until timeout for monitored process [2022-12-14 06:20:14,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:20:14,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:20:14,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 06:20:14,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:20:14,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:20:14,148 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 15 treesize of output 11 [2022-12-14 06:20:14,206 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 11 treesize of output 5 [2022-12-14 06:20:14,273 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-12-14 06:20:14,273 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 [2022-12-14 06:20:14,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:20:14,322 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 39 treesize of output 32 [2022-12-14 06:20:14,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 5 [2022-12-14 06:20:14,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:20:14,641 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 34 [2022-12-14 06:20:14,683 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:20:14,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2022-12-14 06:20:14,692 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 30 proven. 73 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 06:20:14,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:20:14,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1451877900] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:20:14,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685673241] [2022-12-14 06:20:14,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:20:14,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:20:14,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:20:14,967 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:20:14,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-12-14 06:20:15,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:20:15,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:20:15,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 06:20:15,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:20:15,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:20:15,188 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 15 treesize of output 11 [2022-12-14 06:20:15,238 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 11 treesize of output 5 [2022-12-14 06:20:15,293 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-12-14 06:20:15,293 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 [2022-12-14 06:20:15,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:20:15,336 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 39 treesize of output 32 [2022-12-14 06:20:15,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 5 [2022-12-14 06:20:15,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 06:20:15,620 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 34 [2022-12-14 06:20:15,656 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 06:20:15,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2022-12-14 06:20:15,663 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 30 proven. 73 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 06:20:15,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:20:15,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685673241] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:20:15,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 06:20:15,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 22 [2022-12-14 06:20:15,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338263710] [2022-12-14 06:20:15,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 06:20:15,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 06:20:15,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:20:15,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 06:20:15,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=686, Unknown=0, NotChecked=0, Total=756 [2022-12-14 06:20:15,921 INFO L87 Difference]: Start difference. First operand 200 states and 237 transitions. Second operand has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 06:20:17,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:20:17,482 INFO L93 Difference]: Finished difference Result 214 states and 251 transitions. [2022-12-14 06:20:17,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 06:20:17,483 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 69 [2022-12-14 06:20:17,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:20:17,483 INFO L225 Difference]: With dead ends: 214 [2022-12-14 06:20:17,483 INFO L226 Difference]: Without dead ends: 214 [2022-12-14 06:20:17,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 214 SyntacticMatches, 11 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=126, Invalid=1206, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 06:20:17,483 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 24 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:20:17,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 516 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 792 Invalid, 2 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 06:20:17,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-12-14 06:20:17,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2022-12-14 06:20:17,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 185 states have (on average 1.2) internal successors, (222), 192 states have internal predecessors, (222), 11 states have call successors, (11), 6 states have call predecessors, (11), 9 states have return successors, (18), 15 states have call predecessors, (18), 11 states have call successors, (18) [2022-12-14 06:20:17,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 251 transitions. [2022-12-14 06:20:17,488 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 251 transitions. Word has length 69 [2022-12-14 06:20:17,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:20:17,488 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 251 transitions. [2022-12-14 06:20:17,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 06:20:17,488 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 251 transitions. [2022-12-14 06:20:17,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-12-14 06:20:17,489 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:20:17,489 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:20:17,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-12-14 06:20:17,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (106)] Ended with exit code 0 [2022-12-14 06:20:17,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (105)] Forceful destruction successful, exit code 0 [2022-12-14 06:20:18,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:20:18,091 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:20:18,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:20:18,092 INFO L85 PathProgramCache]: Analyzing trace with hash 752407323, now seen corresponding path program 4 times [2022-12-14 06:20:18,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:20:18,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1597911160] [2022-12-14 06:20:18,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:20:18,093 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:20:18,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:20:18,096 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:20:18,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2022-12-14 06:20:18,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:20:18,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:20:18,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 06:20:18,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:20:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 06:20:18,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:20:18,758 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 06:20:18,758 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 06:20:18,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1597911160] [2022-12-14 06:20:18,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1597911160] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:20:18,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2056233313] [2022-12-14 06:20:18,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:20:18,758 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 06:20:18,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 06:20:18,759 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 06:20:18,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (109)] Waiting until timeout for monitored process [2022-12-14 06:20:18,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:20:18,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:20:18,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 06:20:18,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:20:19,071 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 06:20:19,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:20:19,200 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 06:20:19,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2056233313] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:20:19,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482679556] [2022-12-14 06:20:19,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:20:19,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:20:19,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:20:19,201 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:20:19,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-12-14 06:20:19,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:20:19,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:20:19,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 06:20:19,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:20:19,611 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 06:20:19,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:20:20,851 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 06:20:20,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482679556] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:20:20,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 06:20:20,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 12, 13] total 32 [2022-12-14 06:20:20,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965452800] [2022-12-14 06:20:20,852 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 06:20:20,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 06:20:20,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 06:20:20,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 06:20:20,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2022-12-14 06:20:20,854 INFO L87 Difference]: Start difference. First operand 214 states and 251 transitions. Second operand has 32 states, 32 states have (on average 4.375) internal successors, (140), 32 states have internal predecessors, (140), 17 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-12-14 06:20:21,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:20:21,466 INFO L93 Difference]: Finished difference Result 211 states and 238 transitions. [2022-12-14 06:20:21,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 06:20:21,467 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.375) internal successors, (140), 32 states have internal predecessors, (140), 17 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 68 [2022-12-14 06:20:21,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:20:21,468 INFO L225 Difference]: With dead ends: 211 [2022-12-14 06:20:21,468 INFO L226 Difference]: Without dead ends: 211 [2022-12-14 06:20:21,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=246, Invalid=1160, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 06:20:21,468 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 180 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 06:20:21,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 466 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 06:20:21,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-12-14 06:20:21,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 201. [2022-12-14 06:20:21,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 172 states have (on average 1.1686046511627908) internal successors, (201), 179 states have internal predecessors, (201), 11 states have call successors, (11), 6 states have call predecessors, (11), 9 states have return successors, (18), 15 states have call predecessors, (18), 11 states have call successors, (18) [2022-12-14 06:20:21,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 230 transitions. [2022-12-14 06:20:21,471 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 230 transitions. Word has length 68 [2022-12-14 06:20:21,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:20:21,471 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 230 transitions. [2022-12-14 06:20:21,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.375) internal successors, (140), 32 states have internal predecessors, (140), 17 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-12-14 06:20:21,471 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 230 transitions. [2022-12-14 06:20:21,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 06:20:21,471 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:20:21,471 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:20:21,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (109)] Ended with exit code 0 [2022-12-14 06:20:21,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-12-14 06:20:21,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (108)] Ended with exit code 0 [2022-12-14 06:20:22,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:20:22,074 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-12-14 06:20:22,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:20:22,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1508887660, now seen corresponding path program 3 times [2022-12-14 06:20:22,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 06:20:22,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1444554165] [2022-12-14 06:20:22,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:20:22,076 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 06:20:22,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 06:20:22,085 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 06:20:22,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6935134e-0c97-432c-83df-fa579ee5f40b/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (111)] Waiting until timeout for monitored process [2022-12-14 06:20:22,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 06:20:22,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:20:22,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 06:20:22,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:20:22,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 06:20:22,525 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 06:20:22,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 06:20:22,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 06:20:24,661 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_238| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_289| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_408| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_238|) (bvadd (_ bv4294967292 32) (bvmul (_ bv4 32) |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_408|) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_289|)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_238|))) is different from true [2022-12-14 06:20:24,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 29 treesize of output 28 [2022-12-14 06:20:26,867 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_239| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_290| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_409| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_239|) (bvadd (bvmul (_ bv4 32) |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_409|) (_ bv4294967288 32) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_290|)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_239|))) is different from true [2022-12-14 06:20:27,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 29 treesize of output 28 [2022-12-14 06:20:29,097 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_410| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_291| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_240| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_240|) (bvadd (bvmul (_ bv4 32) |v_ULTIMATE.start_entry_point_~i~0#1_BEFORE_CALL_410|) (_ bv4294967284 32) |v_ULTIMATE.start_entry_point_~array~0#1.offset_BEFORE_CALL_291|)) |v_ULTIMATE.start_entry_point_~array~0#1.base_BEFORE_CALL_240|))) is different from true