./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE --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 0739bef7461b62f52995e3feabe5faf9fb4f95fee3f2cf661c4248d2611e75f6 ............................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE --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 0739bef7461b62f52995e3feabe5faf9fb4f95fee3f2cf661c4248d2611e75f6 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 10:38:17,691 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 10:38:17,693 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 10:38:17,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 10:38:17,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 10:38:17,731 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 10:38:17,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 10:38:17,736 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 10:38:17,738 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 10:38:17,739 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 10:38:17,741 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 10:38:17,742 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 10:38:17,743 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 10:38:17,745 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 10:38:17,747 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 10:38:17,748 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 10:38:17,750 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 10:38:17,751 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 10:38:17,753 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 10:38:17,756 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 10:38:17,758 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 10:38:17,760 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 10:38:17,762 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 10:38:17,763 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 10:38:17,767 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 10:38:17,767 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 10:38:17,768 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 10:38:17,769 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 10:38:17,770 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 10:38:17,771 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 10:38:17,771 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 10:38:17,772 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 10:38:17,774 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 10:38:17,775 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 10:38:17,776 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 10:38:17,777 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 10:38:17,778 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 10:38:17,778 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 10:38:17,778 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 10:38:17,780 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 10:38:17,781 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 10:38:17,782 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-24 10:38:17,831 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 10:38:17,833 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 10:38:17,834 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 10:38:17,834 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 10:38:17,834 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 10:38:17,835 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 10:38:17,835 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 10:38:17,835 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 10:38:17,835 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 10:38:17,836 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 10:38:17,837 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 10:38:17,837 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 10:38:17,837 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 10:38:17,837 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 10:38:17,838 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 10:38:17,838 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-24 10:38:17,838 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-24 10:38:17,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 10:38:17,839 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 10:38:17,839 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-24 10:38:17,839 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 10:38:17,840 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 10:38:17,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 10:38:17,840 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-24 10:38:17,840 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-24 10:38:17,840 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-24 10:38:17,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 10:38:17,842 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 10:38:17,843 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 10:38:17,843 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 10:38:17,843 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 10:38:17,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 10:38:17,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:38:17,844 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 10:38:17,844 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 10:38:17,844 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 10:38:17,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 10:38:17,845 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 10:38:17,845 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 10:38:17,845 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0739bef7461b62f52995e3feabe5faf9fb4f95fee3f2cf661c4248d2611e75f6 [2021-10-24 10:38:18,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 10:38:18,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 10:38:18,200 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 10:38:18,201 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 10:38:18,202 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 10:38:18,203 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_4.i [2021-10-24 10:38:18,312 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/data/33aec32f2/1bb12cfc10c24a2f899b16b6f9e4df3c/FLAGbc10014ae [2021-10-24 10:38:18,934 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 10:38:18,935 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/sv-benchmarks/c/ldv-memsafety/memleaks_test22_4.i [2021-10-24 10:38:18,955 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/data/33aec32f2/1bb12cfc10c24a2f899b16b6f9e4df3c/FLAGbc10014ae [2021-10-24 10:38:19,184 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/data/33aec32f2/1bb12cfc10c24a2f899b16b6f9e4df3c [2021-10-24 10:38:19,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 10:38:19,193 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 10:38:19,207 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 10:38:19,208 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 10:38:19,212 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 10:38:19,213 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:38:19" (1/1) ... [2021-10-24 10:38:19,215 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a41b9ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:38:19, skipping insertion in model container [2021-10-24 10:38:19,215 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:38:19" (1/1) ... [2021-10-24 10:38:19,224 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 10:38:19,290 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 10:38:19,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:38:19,739 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-10-24 10:38:19,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4092b8e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:38:19, skipping insertion in model container [2021-10-24 10:38:19,740 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 10:38:19,741 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-10-24 10:38:19,743 INFO L168 Benchmark]: Toolchain (without parser) took 549.02 ms. Allocated memory is still 119.5 MB. Free memory was 84.2 MB in the beginning and 93.0 MB in the end (delta: -8.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-24 10:38:19,744 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 86.0 MB. Free memory was 56.9 MB in the beginning and 56.9 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:38:19,745 INFO L168 Benchmark]: CACSL2BoogieTranslator took 533.39 ms. Allocated memory is still 119.5 MB. Free memory was 83.8 MB in the beginning and 93.0 MB in the end (delta: -9.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-24 10:38:19,747 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 86.0 MB. Free memory was 56.9 MB in the beginning and 56.9 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 533.39 ms. Allocated memory is still 119.5 MB. Free memory was 83.8 MB in the beginning and 93.0 MB in the end (delta: -9.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type 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... ### Bit-precise run ### This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 10:38:22,273 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 10:38:22,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 10:38:22,307 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 10:38:22,308 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 10:38:22,309 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 10:38:22,311 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 10:38:22,314 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 10:38:22,316 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 10:38:22,317 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 10:38:22,318 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 10:38:22,320 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 10:38:22,321 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 10:38:22,322 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 10:38:22,324 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 10:38:22,325 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 10:38:22,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 10:38:22,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 10:38:22,331 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 10:38:22,334 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 10:38:22,336 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 10:38:22,342 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 10:38:22,344 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 10:38:22,346 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 10:38:22,350 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 10:38:22,354 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 10:38:22,355 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 10:38:22,358 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 10:38:22,363 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 10:38:22,364 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 10:38:22,366 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 10:38:22,367 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 10:38:22,368 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 10:38:22,370 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 10:38:22,372 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 10:38:22,372 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 10:38:22,373 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 10:38:22,374 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 10:38:22,374 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 10:38:22,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 10:38:22,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 10:38:22,378 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-24 10:38:22,429 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 10:38:22,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 10:38:22,431 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 10:38:22,431 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 10:38:22,431 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 10:38:22,432 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 10:38:22,432 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 10:38:22,432 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 10:38:22,432 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 10:38:22,433 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-24 10:38:22,433 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-24 10:38:22,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 10:38:22,434 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 10:38:22,434 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-24 10:38:22,434 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 10:38:22,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 10:38:22,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 10:38:22,435 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-24 10:38:22,435 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-24 10:38:22,435 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-24 10:38:22,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 10:38:22,436 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 10:38:22,436 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-24 10:38:22,436 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-24 10:38:22,436 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 10:38:22,437 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 10:38:22,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 10:38:22,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-24 10:38:22,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 10:38:22,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:38:22,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 10:38:22,438 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 10:38:22,438 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-24 10:38:22,439 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-24 10:38:22,439 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 10:38:22,439 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 10:38:22,439 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_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0739bef7461b62f52995e3feabe5faf9fb4f95fee3f2cf661c4248d2611e75f6 [2021-10-24 10:38:22,868 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 10:38:22,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 10:38:22,899 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 10:38:22,901 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 10:38:22,902 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 10:38:22,903 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_4.i [2021-10-24 10:38:22,997 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/data/d7f5ad656/29c0133c34be4fd484055463c712c69d/FLAG619989fc4 [2021-10-24 10:38:23,716 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 10:38:23,730 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/sv-benchmarks/c/ldv-memsafety/memleaks_test22_4.i [2021-10-24 10:38:23,761 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/data/d7f5ad656/29c0133c34be4fd484055463c712c69d/FLAG619989fc4 [2021-10-24 10:38:23,928 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/data/d7f5ad656/29c0133c34be4fd484055463c712c69d [2021-10-24 10:38:23,936 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 10:38:23,938 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 10:38:23,939 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 10:38:23,940 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 10:38:23,956 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 10:38:23,957 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:38:23" (1/1) ... [2021-10-24 10:38:23,958 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b81d1be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:38:23, skipping insertion in model container [2021-10-24 10:38:23,958 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:38:23" (1/1) ... [2021-10-24 10:38:23,966 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 10:38:24,012 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 10:38:24,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:38:24,417 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-10-24 10:38:24,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 10:38:24,483 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:38:24,493 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 10:38:24,603 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:38:24,669 INFO L208 MainTranslator]: Completed translation [2021-10-24 10:38:24,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:38:24 WrapperNode [2021-10-24 10:38:24,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 10:38:24,671 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 10:38:24,672 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 10:38:24,672 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 10:38:24,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:38:24" (1/1) ... [2021-10-24 10:38:24,730 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:38:24" (1/1) ... [2021-10-24 10:38:24,770 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 10:38:24,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 10:38:24,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 10:38:24,772 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 10:38:24,781 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:38:24" (1/1) ... [2021-10-24 10:38:24,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:38:24" (1/1) ... [2021-10-24 10:38:24,804 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:38:24" (1/1) ... [2021-10-24 10:38:24,807 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:38:24" (1/1) ... [2021-10-24 10:38:24,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:38:24" (1/1) ... [2021-10-24 10:38:24,824 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:38:24" (1/1) ... [2021-10-24 10:38:24,827 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:38:24" (1/1) ... [2021-10-24 10:38:24,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 10:38:24,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 10:38:24,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 10:38:24,835 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 10:38:24,836 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:38:24" (1/1) ... [2021-10-24 10:38:24,844 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:38:24,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:38:24,884 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 10:38:24,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 10:38:24,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-24 10:38:24,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-24 10:38:24,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-24 10:38:24,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 10:38:24,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-24 10:38:24,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-24 10:38:24,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-24 10:38:24,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-24 10:38:24,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 10:38:24,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 10:38:25,741 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 10:38:25,741 INFO L299 CfgBuilder]: Removed 42 assume(true) statements. [2021-10-24 10:38:25,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:38:25 BoogieIcfgContainer [2021-10-24 10:38:25,744 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 10:38:25,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 10:38:25,746 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 10:38:25,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 10:38:25,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 10:38:23" (1/3) ... [2021-10-24 10:38:25,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39b0c538 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:38:25, skipping insertion in model container [2021-10-24 10:38:25,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:38:24" (2/3) ... [2021-10-24 10:38:25,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39b0c538 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:38:25, skipping insertion in model container [2021-10-24 10:38:25,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:38:25" (3/3) ... [2021-10-24 10:38:25,755 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test22_4.i [2021-10-24 10:38:25,760 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 10:38:25,763 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2021-10-24 10:38:25,828 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 10:38:25,835 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-10-24 10:38:25,836 INFO L340 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2021-10-24 10:38:25,856 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 72 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:25,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-24 10:38:25,876 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:38:25,877 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-24 10:38:25,877 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-10-24 10:38:25,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:38:25,884 INFO L82 PathProgramCache]: Analyzing trace with hash 889508776, now seen corresponding path program 1 times [2021-10-24 10:38:25,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:38:25,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1996973781] [2021-10-24 10:38:25,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:25,902 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:38:25,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:38:25,906 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:38:25,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-24 10:38:26,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:26,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-24 10:38:26,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:26,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-10-24 10:38:26,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:26,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:26,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:26,299 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:38:26,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1996973781] [2021-10-24 10:38:26,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1996973781] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:38:26,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:38:26,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-24 10:38:26,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88386703] [2021-10-24 10:38:26,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 10:38:26,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:38:26,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 10:38:26,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-24 10:38:26,334 INFO L87 Difference]: Start difference. First operand has 73 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 72 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:26,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:38:26,969 INFO L93 Difference]: Finished difference Result 216 states and 234 transitions. [2021-10-24 10:38:26,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 10:38:26,971 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-24 10:38:26,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:38:26,987 INFO L225 Difference]: With dead ends: 216 [2021-10-24 10:38:26,987 INFO L226 Difference]: Without dead ends: 208 [2021-10-24 10:38:26,989 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-24 10:38:27,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-10-24 10:38:27,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 74. [2021-10-24 10:38:27,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 49 states have (on average 1.6938775510204083) internal successors, (83), 73 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:27,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2021-10-24 10:38:27,040 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 6 [2021-10-24 10:38:27,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:38:27,040 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2021-10-24 10:38:27,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:27,041 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2021-10-24 10:38:27,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-24 10:38:27,042 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:38:27,042 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-24 10:38:27,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-24 10:38:27,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:38:27,253 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-10-24 10:38:27,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:38:27,254 INFO L82 PathProgramCache]: Analyzing trace with hash 889568358, now seen corresponding path program 1 times [2021-10-24 10:38:27,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:38:27,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [539198477] [2021-10-24 10:38:27,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:27,255 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:38:27,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:38:27,257 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:38:27,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-24 10:38:27,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:27,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 10:38:27,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:27,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:27,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:27,484 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:38:27,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [539198477] [2021-10-24 10:38:27,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [539198477] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:38:27,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:38:27,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-24 10:38:27,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384524422] [2021-10-24 10:38:27,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:38:27,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:38:27,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:38:27,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:38:27,489 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:27,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:38:27,543 INFO L93 Difference]: Finished difference Result 166 states and 180 transitions. [2021-10-24 10:38:27,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 10:38:27,544 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-24 10:38:27,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:38:27,547 INFO L225 Difference]: With dead ends: 166 [2021-10-24 10:38:27,549 INFO L226 Difference]: Without dead ends: 166 [2021-10-24 10:38:27,550 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-24 10:38:27,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-10-24 10:38:27,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 72. [2021-10-24 10:38:27,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.6666666666666667) internal successors, (80), 71 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:27,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2021-10-24 10:38:27,571 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 6 [2021-10-24 10:38:27,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:38:27,572 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2021-10-24 10:38:27,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:27,573 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2021-10-24 10:38:27,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-24 10:38:27,574 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:38:27,574 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:38:27,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-24 10:38:27,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:38:27,791 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-10-24 10:38:27,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:38:27,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1804968328, now seen corresponding path program 1 times [2021-10-24 10:38:27,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:38:27,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [982066787] [2021-10-24 10:38:27,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:27,794 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:38:27,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:38:27,795 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:38:27,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-24 10:38:27,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:27,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-24 10:38:27,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:27,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-10-24 10:38:28,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:28,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:28,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:28,420 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:38:28,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [982066787] [2021-10-24 10:38:28,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [982066787] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:38:28,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:38:28,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-24 10:38:28,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223076273] [2021-10-24 10:38:28,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-24 10:38:28,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:38:28,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-24 10:38:28,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-24 10:38:28,423 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:29,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:38:29,115 INFO L93 Difference]: Finished difference Result 165 states and 179 transitions. [2021-10-24 10:38:29,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 10:38:29,116 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-24 10:38:29,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:38:29,118 INFO L225 Difference]: With dead ends: 165 [2021-10-24 10:38:29,118 INFO L226 Difference]: Without dead ends: 165 [2021-10-24 10:38:29,118 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 317.7ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-10-24 10:38:29,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-10-24 10:38:29,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 71. [2021-10-24 10:38:29,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 70 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:29,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2021-10-24 10:38:29,127 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 7 [2021-10-24 10:38:29,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:38:29,127 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2021-10-24 10:38:29,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:29,128 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2021-10-24 10:38:29,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-24 10:38:29,128 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:38:29,128 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:38:29,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-24 10:38:29,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:38:29,341 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-10-24 10:38:29,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:38:29,342 INFO L82 PathProgramCache]: Analyzing trace with hash 119421555, now seen corresponding path program 1 times [2021-10-24 10:38:29,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:38:29,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1682469190] [2021-10-24 10:38:29,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:29,343 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:38:29,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:38:29,345 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:38:29,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-24 10:38:29,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:29,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 10:38:29,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:29,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:29,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:29,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:29,490 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:38:29,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1682469190] [2021-10-24 10:38:29,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1682469190] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:38:29,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:38:29,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-24 10:38:29,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870702185] [2021-10-24 10:38:29,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:38:29,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:38:29,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:38:29,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:38:29,494 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:29,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:38:29,523 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2021-10-24 10:38:29,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:38:29,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-24 10:38:29,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:38:29,525 INFO L225 Difference]: With dead ends: 118 [2021-10-24 10:38:29,526 INFO L226 Difference]: Without dead ends: 118 [2021-10-24 10:38:29,526 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-24 10:38:29,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-24 10:38:29,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 71. [2021-10-24 10:38:29,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 48 states have (on average 1.625) internal successors, (78), 70 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:29,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2021-10-24 10:38:29,534 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 8 [2021-10-24 10:38:29,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:38:29,534 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2021-10-24 10:38:29,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:29,535 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2021-10-24 10:38:29,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-24 10:38:29,536 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:38:29,536 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:38:29,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-24 10:38:29,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:38:29,753 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-10-24 10:38:29,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:38:29,754 INFO L82 PathProgramCache]: Analyzing trace with hash 176679857, now seen corresponding path program 1 times [2021-10-24 10:38:29,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:38:29,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1276566532] [2021-10-24 10:38:29,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:29,755 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:38:29,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:38:29,758 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:38:29,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-24 10:38:29,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:29,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-24 10:38:29,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:29,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:29,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:29,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:29,989 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:38:29,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1276566532] [2021-10-24 10:38:29,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1276566532] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:38:29,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:38:29,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-24 10:38:29,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124433090] [2021-10-24 10:38:29,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:38:29,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:38:29,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:38:29,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:38:29,992 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:30,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:38:30,029 INFO L93 Difference]: Finished difference Result 145 states and 156 transitions. [2021-10-24 10:38:30,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 10:38:30,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-24 10:38:30,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:38:30,031 INFO L225 Difference]: With dead ends: 145 [2021-10-24 10:38:30,032 INFO L226 Difference]: Without dead ends: 145 [2021-10-24 10:38:30,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-24 10:38:30,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-24 10:38:30,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 73. [2021-10-24 10:38:30,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 50 states have (on average 1.6) internal successors, (80), 72 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:30,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2021-10-24 10:38:30,038 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 8 [2021-10-24 10:38:30,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:38:30,038 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2021-10-24 10:38:30,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:30,038 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2021-10-24 10:38:30,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-24 10:38:30,039 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:38:30,039 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:38:30,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-24 10:38:30,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:38:30,240 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-10-24 10:38:30,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:38:30,241 INFO L82 PathProgramCache]: Analyzing trace with hash 820865718, now seen corresponding path program 1 times [2021-10-24 10:38:30,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:38:30,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1364406693] [2021-10-24 10:38:30,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:30,242 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:38:30,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:38:30,243 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:38:30,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-24 10:38:30,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:30,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 10:38:30,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:30,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:30,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:30,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:30,480 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:38:30,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1364406693] [2021-10-24 10:38:30,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1364406693] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:38:30,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:38:30,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-24 10:38:30,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862264088] [2021-10-24 10:38:30,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-24 10:38:30,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:38:30,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-24 10:38:30,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-24 10:38:30,486 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:30,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:38:30,526 INFO L93 Difference]: Finished difference Result 111 states and 120 transitions. [2021-10-24 10:38:30,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 10:38:30,527 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-24 10:38:30,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:38:30,529 INFO L225 Difference]: With dead ends: 111 [2021-10-24 10:38:30,529 INFO L226 Difference]: Without dead ends: 111 [2021-10-24 10:38:30,529 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-24 10:38:30,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-24 10:38:30,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 75. [2021-10-24 10:38:30,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 52 states have (on average 1.5769230769230769) internal successors, (82), 74 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:30,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2021-10-24 10:38:30,546 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 12 [2021-10-24 10:38:30,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:38:30,546 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2021-10-24 10:38:30,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:30,548 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2021-10-24 10:38:30,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-24 10:38:30,551 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:38:30,551 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:38:30,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-10-24 10:38:30,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:38:30,765 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-10-24 10:38:30,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:38:30,766 INFO L82 PathProgramCache]: Analyzing trace with hash 2137107767, now seen corresponding path program 1 times [2021-10-24 10:38:30,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:38:30,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2090802378] [2021-10-24 10:38:30,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:30,767 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:38:30,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:38:30,768 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:38:30,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-24 10:38:30,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:30,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-24 10:38:30,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:30,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:30,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:30,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:30,997 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:38:30,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2090802378] [2021-10-24 10:38:30,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2090802378] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:38:31,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:38:31,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-24 10:38:31,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115662370] [2021-10-24 10:38:31,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:38:31,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:38:31,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:38:31,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:38:31,005 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:31,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:38:31,127 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2021-10-24 10:38:31,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:38:31,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-24 10:38:31,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:38:31,129 INFO L225 Difference]: With dead ends: 102 [2021-10-24 10:38:31,129 INFO L226 Difference]: Without dead ends: 99 [2021-10-24 10:38:31,129 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:38:31,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-24 10:38:31,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 85. [2021-10-24 10:38:31,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 62 states have (on average 1.5483870967741935) internal successors, (96), 84 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:31,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2021-10-24 10:38:31,144 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 12 [2021-10-24 10:38:31,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:38:31,145 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2021-10-24 10:38:31,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:31,145 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2021-10-24 10:38:31,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-24 10:38:31,146 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:38:31,146 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:38:31,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-24 10:38:31,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:38:31,356 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-10-24 10:38:31,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:38:31,357 INFO L82 PathProgramCache]: Analyzing trace with hash 2137106293, now seen corresponding path program 1 times [2021-10-24 10:38:31,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:38:31,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721151917] [2021-10-24 10:38:31,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:31,357 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:38:31,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:38:31,359 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:38:31,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-24 10:38:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:31,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-24 10:38:31,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:31,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:31,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:31,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:31,673 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:38:31,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721151917] [2021-10-24 10:38:31,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721151917] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:38:31,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:38:31,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-24 10:38:31,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191112134] [2021-10-24 10:38:31,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 10:38:31,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:38:31,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 10:38:31,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-24 10:38:31,675 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:31,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:38:31,724 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2021-10-24 10:38:31,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 10:38:31,725 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-24 10:38:31,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:38:31,725 INFO L225 Difference]: With dead ends: 81 [2021-10-24 10:38:31,725 INFO L226 Difference]: Without dead ends: 73 [2021-10-24 10:38:31,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-24 10:38:31,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-24 10:38:31,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-10-24 10:38:31,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 48 states have (on average 1.6041666666666667) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:31,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2021-10-24 10:38:31,729 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 12 [2021-10-24 10:38:31,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:38:31,729 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2021-10-24 10:38:31,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:31,730 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2021-10-24 10:38:31,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-24 10:38:31,730 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:38:31,730 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:38:31,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-24 10:38:31,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:38:31,946 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-10-24 10:38:31,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:38:31,950 INFO L82 PathProgramCache]: Analyzing trace with hash 976647734, now seen corresponding path program 1 times [2021-10-24 10:38:31,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:38:31,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2056873640] [2021-10-24 10:38:31,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:31,950 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:38:31,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:38:31,951 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:38:31,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-24 10:38:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:32,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 10:38:32,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:32,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:32,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:32,364 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:38:32,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2056873640] [2021-10-24 10:38:32,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2056873640] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:38:32,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [815100931] [2021-10-24 10:38:32,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:32,365 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:38:32,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:38:32,367 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:38:32,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-10-24 10:38:32,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:32,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 10:38:32,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:32,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:32,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:32,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:32,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [815100931] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:38:32,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865350456] [2021-10-24 10:38:32,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:32,698 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:38:32,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:38:32,702 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:38:32,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-24 10:38:32,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:32,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-24 10:38:32,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:32,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-10-24 10:38:33,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:38:33,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:33,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:38:33,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865350456] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:38:33,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-24 10:38:33,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [6, 6, 6, 6] total 15 [2021-10-24 10:38:33,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230557839] [2021-10-24 10:38:33,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 10:38:33,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:38:33,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 10:38:33,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-10-24 10:38:33,187 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:33,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:38:33,699 INFO L93 Difference]: Finished difference Result 154 states and 163 transitions. [2021-10-24 10:38:33,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 10:38:33,700 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-24 10:38:33,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:38:33,701 INFO L225 Difference]: With dead ends: 154 [2021-10-24 10:38:33,701 INFO L226 Difference]: Without dead ends: 154 [2021-10-24 10:38:33,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 380.0ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-10-24 10:38:33,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-10-24 10:38:33,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 70. [2021-10-24 10:38:33,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 69 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:33,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2021-10-24 10:38:33,707 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 14 [2021-10-24 10:38:33,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:38:33,707 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2021-10-24 10:38:33,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:33,707 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2021-10-24 10:38:33,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-24 10:38:33,708 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:38:33,708 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:38:33,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-24 10:38:33,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-10-24 10:38:34,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-24 10:38:34,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:38:34,318 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-10-24 10:38:34,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:38:34,319 INFO L82 PathProgramCache]: Analyzing trace with hash 976647735, now seen corresponding path program 1 times [2021-10-24 10:38:34,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:38:34,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1217566497] [2021-10-24 10:38:34,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:34,320 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:38:34,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:38:34,321 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:38:34,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-24 10:38:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:34,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 10:38:34,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:34,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:34,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:34,683 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:38:34,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1217566497] [2021-10-24 10:38:34,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1217566497] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:38:34,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [219132582] [2021-10-24 10:38:34,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:34,684 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:38:34,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:38:34,690 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:38:34,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-10-24 10:38:34,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:34,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 10:38:34,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:35,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:35,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:35,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:35,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [219132582] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:38:35,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703719384] [2021-10-24 10:38:35,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:35,090 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:38:35,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:38:35,098 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:38:35,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-24 10:38:35,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:35,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-24 10:38:35,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:35,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-10-24 10:38:35,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:38:35,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:36,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:38:36,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703719384] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:38:36,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-24 10:38:36,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [6, 6, 6, 6] total 22 [2021-10-24 10:38:36,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083004146] [2021-10-24 10:38:36,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-24 10:38:36,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:38:36,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-24 10:38:36,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-10-24 10:38:36,268 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:37,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:38:37,077 INFO L93 Difference]: Finished difference Result 165 states and 177 transitions. [2021-10-24 10:38:37,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-24 10:38:37,079 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-24 10:38:37,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:38:37,081 INFO L225 Difference]: With dead ends: 165 [2021-10-24 10:38:37,081 INFO L226 Difference]: Without dead ends: 165 [2021-10-24 10:38:37,082 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 924.5ms TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-10-24 10:38:37,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-10-24 10:38:37,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 69. [2021-10-24 10:38:37,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 48 states have (on average 1.5625) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:37,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2021-10-24 10:38:37,090 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 14 [2021-10-24 10:38:37,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:38:37,091 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2021-10-24 10:38:37,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:37,091 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2021-10-24 10:38:37,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-24 10:38:37,093 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:38:37,093 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:38:37,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-24 10:38:37,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-10-24 10:38:37,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-24 10:38:37,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:38:37,714 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-10-24 10:38:37,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:38:37,715 INFO L82 PathProgramCache]: Analyzing trace with hash -2040718634, now seen corresponding path program 1 times [2021-10-24 10:38:37,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:38:37,715 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [782910367] [2021-10-24 10:38:37,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:37,716 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:38:37,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:38:37,717 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:38:37,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-24 10:38:37,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:37,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 10:38:37,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:37,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:38,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:38,116 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:38:38,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [782910367] [2021-10-24 10:38:38,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [782910367] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:38:38,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2109639992] [2021-10-24 10:38:38,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:38,119 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:38:38,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:38:38,120 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:38:38,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-10-24 10:38:38,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:38,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 10:38:38,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:38,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:38:38,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:38,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:38:38,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2109639992] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:38:38,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-24 10:38:38,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6, 6] total 13 [2021-10-24 10:38:38,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646316596] [2021-10-24 10:38:38,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 10:38:38,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:38:38,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 10:38:38,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-10-24 10:38:38,596 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:38,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:38:38,649 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2021-10-24 10:38:38,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 10:38:38,650 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-24 10:38:38,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:38:38,651 INFO L225 Difference]: With dead ends: 69 [2021-10-24 10:38:38,651 INFO L226 Difference]: Without dead ends: 69 [2021-10-24 10:38:38,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 187.3ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-10-24 10:38:38,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-24 10:38:38,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-10-24 10:38:38,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 68 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:38,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2021-10-24 10:38:38,654 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 16 [2021-10-24 10:38:38,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:38:38,655 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2021-10-24 10:38:38,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:38,655 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2021-10-24 10:38:38,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-24 10:38:38,656 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:38:38,656 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:38:38,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-10-24 10:38:38,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-10-24 10:38:39,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 10:38:39,068 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-10-24 10:38:39,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:38:39,069 INFO L82 PathProgramCache]: Analyzing trace with hash -2039365097, now seen corresponding path program 1 times [2021-10-24 10:38:39,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:38:39,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [289252337] [2021-10-24 10:38:39,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:39,069 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:38:39,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:38:39,070 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:38:39,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-24 10:38:39,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:39,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 10:38:39,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:39,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:39,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:39,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:39,461 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:38:39,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [289252337] [2021-10-24 10:38:39,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [289252337] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:38:39,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1597117926] [2021-10-24 10:38:39,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:39,462 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:38:39,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:38:39,463 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:38:39,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-10-24 10:38:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:39,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 10:38:39,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:39,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:39,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:39,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:39,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1597117926] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:38:39,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219167983] [2021-10-24 10:38:39,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:39,928 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:38:39,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:38:39,929 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:38:39,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-24 10:38:40,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:40,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-24 10:38:40,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:40,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-10-24 10:38:40,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:38:40,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:40,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:38:40,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219167983] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:38:40,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-24 10:38:40,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [6, 6, 6, 6] total 15 [2021-10-24 10:38:40,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132884719] [2021-10-24 10:38:40,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 10:38:40,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:38:40,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 10:38:40,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-10-24 10:38:40,513 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:40,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:38:40,835 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2021-10-24 10:38:40,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 10:38:40,836 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-24 10:38:40,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:38:40,836 INFO L225 Difference]: With dead ends: 111 [2021-10-24 10:38:40,836 INFO L226 Difference]: Without dead ends: 111 [2021-10-24 10:38:40,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 339.2ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-10-24 10:38:40,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-24 10:38:40,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 67. [2021-10-24 10:38:40,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 48 states have (on average 1.5) internal successors, (72), 66 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:40,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2021-10-24 10:38:40,840 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 16 [2021-10-24 10:38:40,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:38:40,840 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2021-10-24 10:38:40,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:40,840 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2021-10-24 10:38:40,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-24 10:38:40,841 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:38:40,841 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:38:40,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-24 10:38:41,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-10-24 10:38:41,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-10-24 10:38:41,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 10:38:41,442 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-10-24 10:38:41,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:38:41,443 INFO L82 PathProgramCache]: Analyzing trace with hash -2039365096, now seen corresponding path program 1 times [2021-10-24 10:38:41,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:38:41,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [96719364] [2021-10-24 10:38:41,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:41,444 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:38:41,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:38:41,445 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:38:41,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-24 10:38:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:41,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 10:38:41,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:41,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:41,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:41,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:41,936 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:38:41,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [96719364] [2021-10-24 10:38:41,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [96719364] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:38:41,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2081572812] [2021-10-24 10:38:41,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:41,936 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:38:41,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:38:41,938 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:38:41,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-10-24 10:38:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:42,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 10:38:42,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:42,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:42,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:42,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:42,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2081572812] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:38:42,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537575178] [2021-10-24 10:38:42,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:42,419 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:38:42,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:38:42,420 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:38:42,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-24 10:38:42,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:42,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-24 10:38:42,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:42,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-10-24 10:38:43,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:38:43,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:43,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:38:43,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537575178] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:38:43,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-24 10:38:43,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [6, 6, 6, 6] total 22 [2021-10-24 10:38:43,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642427685] [2021-10-24 10:38:43,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-24 10:38:43,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:38:43,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-24 10:38:43,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-10-24 10:38:43,777 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:44,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:38:44,277 INFO L93 Difference]: Finished difference Result 113 states and 121 transitions. [2021-10-24 10:38:44,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-24 10:38:44,278 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-24 10:38:44,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:38:44,279 INFO L225 Difference]: With dead ends: 113 [2021-10-24 10:38:44,279 INFO L226 Difference]: Without dead ends: 113 [2021-10-24 10:38:44,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 955.0ms TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-10-24 10:38:44,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-24 10:38:44,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 65. [2021-10-24 10:38:44,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.4583333333333333) internal successors, (70), 64 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:44,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2021-10-24 10:38:44,282 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 16 [2021-10-24 10:38:44,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:38:44,282 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2021-10-24 10:38:44,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:44,282 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2021-10-24 10:38:44,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-24 10:38:44,283 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:38:44,283 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:38:44,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-24 10:38:44,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-10-24 10:38:44,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2021-10-24 10:38:44,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 10:38:44,884 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-10-24 10:38:44,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:38:44,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1202804242, now seen corresponding path program 1 times [2021-10-24 10:38:44,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:38:44,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1661044875] [2021-10-24 10:38:44,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:44,885 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:38:44,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:38:44,886 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:38:44,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-24 10:38:45,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:45,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 10:38:45,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:45,215 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:45,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:45,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:45,356 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:38:45,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1661044875] [2021-10-24 10:38:45,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1661044875] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:38:45,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1010708219] [2021-10-24 10:38:45,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:45,357 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:38:45,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:38:45,366 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:38:45,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-10-24 10:38:45,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:45,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-24 10:38:45,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:45,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:38:45,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:45,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:38:45,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1010708219] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:38:45,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-24 10:38:45,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [6, 6] total 14 [2021-10-24 10:38:45,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517190409] [2021-10-24 10:38:45,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-24 10:38:45,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:38:45,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-24 10:38:45,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-10-24 10:38:45,935 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:45,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:38:45,996 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2021-10-24 10:38:45,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 10:38:45,996 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-24 10:38:45,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:38:45,997 INFO L225 Difference]: With dead ends: 65 [2021-10-24 10:38:45,997 INFO L226 Difference]: Without dead ends: 65 [2021-10-24 10:38:45,998 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 197.8ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-10-24 10:38:45,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-24 10:38:45,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-10-24 10:38:46,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.4375) internal successors, (69), 64 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:46,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2021-10-24 10:38:46,001 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 17 [2021-10-24 10:38:46,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:38:46,001 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2021-10-24 10:38:46,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:46,001 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2021-10-24 10:38:46,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-24 10:38:46,002 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:38:46,003 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:38:46,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2021-10-24 10:38:46,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-10-24 10:38:46,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:38:46,406 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-10-24 10:38:46,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:38:46,406 INFO L82 PathProgramCache]: Analyzing trace with hash 208974459, now seen corresponding path program 1 times [2021-10-24 10:38:46,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:38:46,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1199380345] [2021-10-24 10:38:46,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:46,407 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:38:46,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:38:46,408 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:38:46,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-24 10:38:46,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:46,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 10:38:46,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:46,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:46,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:46,927 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:46,927 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:38:46,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1199380345] [2021-10-24 10:38:46,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1199380345] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:38:46,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1107869230] [2021-10-24 10:38:46,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:46,928 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:38:46,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:38:46,930 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:38:46,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-10-24 10:38:47,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:47,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 10:38:47,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:47,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:47,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:47,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:47,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1107869230] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:38:47,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866055083] [2021-10-24 10:38:47,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:47,522 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:38:47,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:38:47,522 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:38:47,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-24 10:38:47,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:47,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-24 10:38:47,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:47,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-10-24 10:38:48,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:38:48,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:48,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:38:48,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866055083] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:38:48,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-24 10:38:48,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [6, 6, 6, 6] total 15 [2021-10-24 10:38:48,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125284921] [2021-10-24 10:38:48,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 10:38:48,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:38:48,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 10:38:48,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-10-24 10:38:48,156 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:48,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:38:48,444 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2021-10-24 10:38:48,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 10:38:48,445 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-24 10:38:48,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:38:48,445 INFO L225 Difference]: With dead ends: 95 [2021-10-24 10:38:48,445 INFO L226 Difference]: Without dead ends: 95 [2021-10-24 10:38:48,446 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 102 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 322.2ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-10-24 10:38:48,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-10-24 10:38:48,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 63. [2021-10-24 10:38:48,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 62 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:48,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2021-10-24 10:38:48,449 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 21 [2021-10-24 10:38:48,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:38:48,449 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2021-10-24 10:38:48,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:48,450 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2021-10-24 10:38:48,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-24 10:38:48,450 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:38:48,451 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:38:48,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2021-10-24 10:38:48,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-24 10:38:48,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-24 10:38:49,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:38:49,054 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-10-24 10:38:49,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:38:49,055 INFO L82 PathProgramCache]: Analyzing trace with hash 208974460, now seen corresponding path program 1 times [2021-10-24 10:38:49,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:38:49,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943296623] [2021-10-24 10:38:49,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:49,056 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:38:49,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:38:49,058 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:38:49,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-24 10:38:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:49,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 10:38:49,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:49,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:49,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:49,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:49,613 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:38:49,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943296623] [2021-10-24 10:38:49,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1943296623] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:38:49,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [906704744] [2021-10-24 10:38:49,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:49,614 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:38:49,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:38:49,615 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:38:49,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-10-24 10:38:50,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:50,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 10:38:50,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:50,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:50,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:50,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:50,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [906704744] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:38:50,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581158212] [2021-10-24 10:38:50,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:50,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:38:50,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:38:50,210 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:38:50,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-24 10:38:50,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:50,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-24 10:38:50,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:50,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-10-24 10:38:50,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:38:50,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:51,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:38:51,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581158212] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:38:51,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-24 10:38:51,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [6, 6, 6, 6] total 22 [2021-10-24 10:38:51,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369544458] [2021-10-24 10:38:51,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-24 10:38:51,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:38:51,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-24 10:38:51,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-10-24 10:38:51,630 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 14 states, 13 states have (on average 3.0) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:52,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:38:52,152 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2021-10-24 10:38:52,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-24 10:38:52,154 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-24 10:38:52,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:38:52,155 INFO L225 Difference]: With dead ends: 97 [2021-10-24 10:38:52,155 INFO L226 Difference]: Without dead ends: 97 [2021-10-24 10:38:52,156 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 863.1ms TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-10-24 10:38:52,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-10-24 10:38:52,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 61. [2021-10-24 10:38:52,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 60 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:52,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2021-10-24 10:38:52,159 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 21 [2021-10-24 10:38:52,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:38:52,160 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2021-10-24 10:38:52,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:52,160 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2021-10-24 10:38:52,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-24 10:38:52,161 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:38:52,161 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:38:52,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-10-24 10:38:52,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2021-10-24 10:38:52,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-10-24 10:38:52,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:38:52,767 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-10-24 10:38:52,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:38:52,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1667629311, now seen corresponding path program 1 times [2021-10-24 10:38:52,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:38:52,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282256510] [2021-10-24 10:38:52,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:52,768 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:38:52,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:38:52,769 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:38:52,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-24 10:38:53,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:53,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 10:38:53,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:53,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:53,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:53,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:53,432 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:38:53,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282256510] [2021-10-24 10:38:53,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282256510] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:38:53,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [239325258] [2021-10-24 10:38:53,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:53,433 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:38:53,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:38:53,434 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:38:53,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-10-24 10:38:53,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:53,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-24 10:38:53,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:54,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:38:54,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:54,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:38:54,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [239325258] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:38:54,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-24 10:38:54,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [6, 6] total 14 [2021-10-24 10:38:54,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134788719] [2021-10-24 10:38:54,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-24 10:38:54,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:38:54,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-24 10:38:54,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-10-24 10:38:54,104 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:54,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:38:54,187 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2021-10-24 10:38:54,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 10:38:54,188 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-24 10:38:54,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:38:54,189 INFO L225 Difference]: With dead ends: 61 [2021-10-24 10:38:54,189 INFO L226 Difference]: Without dead ends: 61 [2021-10-24 10:38:54,190 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 187.0ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-10-24 10:38:54,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-24 10:38:54,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-10-24 10:38:54,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 60 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:54,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2021-10-24 10:38:54,193 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 25 [2021-10-24 10:38:54,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:38:54,193 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2021-10-24 10:38:54,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:54,194 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2021-10-24 10:38:54,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-24 10:38:54,195 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:38:54,195 INFO L512 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-10-24 10:38:54,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-10-24 10:38:54,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-10-24 10:38:54,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:38:54,598 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-10-24 10:38:54,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:38:54,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1821511215, now seen corresponding path program 1 times [2021-10-24 10:38:54,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:38:54,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1420443802] [2021-10-24 10:38:54,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:54,600 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:38:54,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:38:54,601 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:38:54,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-10-24 10:38:54,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:54,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 10:38:54,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:55,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:55,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:55,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:55,248 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:38:55,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1420443802] [2021-10-24 10:38:55,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1420443802] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:38:55,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [462501205] [2021-10-24 10:38:55,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:55,248 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:38:55,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:38:55,249 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:38:55,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-10-24 10:38:55,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:55,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-24 10:38:55,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:55,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:38:55,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:56,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:38:56,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [462501205] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:38:56,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-24 10:38:56,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [6, 6] total 15 [2021-10-24 10:38:56,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553474519] [2021-10-24 10:38:56,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 10:38:56,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:38:56,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 10:38:56,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-10-24 10:38:56,043 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:56,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:38:56,152 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2021-10-24 10:38:56,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 10:38:56,153 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-24 10:38:56,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:38:56,154 INFO L225 Difference]: With dead ends: 61 [2021-10-24 10:38:56,154 INFO L226 Difference]: Without dead ends: 61 [2021-10-24 10:38:56,155 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 223.8ms TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-10-24 10:38:56,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-24 10:38:56,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-10-24 10:38:56,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 48 states have (on average 1.3125) internal successors, (63), 60 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:56,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2021-10-24 10:38:56,157 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 30 [2021-10-24 10:38:56,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:38:56,158 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2021-10-24 10:38:56,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:56,158 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2021-10-24 10:38:56,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-24 10:38:56,159 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:38:56,159 INFO L512 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-10-24 10:38:56,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-10-24 10:38:56,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-10-24 10:38:56,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 10:38:56,563 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-10-24 10:38:56,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:38:56,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1821512689, now seen corresponding path program 1 times [2021-10-24 10:38:56,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:38:56,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1488378319] [2021-10-24 10:38:56,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:56,564 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:38:56,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:38:56,565 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:38:56,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-10-24 10:38:56,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:56,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 10:38:56,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:57,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:57,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:57,251 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:38:57,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1488378319] [2021-10-24 10:38:57,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1488378319] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:38:57,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1829225576] [2021-10-24 10:38:57,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:57,252 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:38:57,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:38:57,252 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:38:57,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-10-24 10:38:57,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:57,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 10:38:57,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:57,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:57,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:58,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:38:58,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1829225576] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:38:58,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119693889] [2021-10-24 10:38:58,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:58,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:38:58,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:38:58,022 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:38:58,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-24 10:38:58,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:38:58,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-24 10:38:58,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:38:58,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-10-24 10:38:58,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:38:58,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:38:58,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:38:58,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119693889] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:38:58,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-24 10:38:58,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [6, 6, 6, 6] total 16 [2021-10-24 10:38:58,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584002740] [2021-10-24 10:38:58,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-24 10:38:58,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:38:58,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-24 10:38:58,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-10-24 10:38:58,900 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:59,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:38:59,215 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2021-10-24 10:38:59,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-24 10:38:59,222 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-24 10:38:59,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:38:59,223 INFO L225 Difference]: With dead ends: 63 [2021-10-24 10:38:59,223 INFO L226 Difference]: Without dead ends: 63 [2021-10-24 10:38:59,224 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 157 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 346.9ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-10-24 10:38:59,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-24 10:38:59,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2021-10-24 10:38:59,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 58 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:59,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2021-10-24 10:38:59,226 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 30 [2021-10-24 10:38:59,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:38:59,226 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2021-10-24 10:38:59,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:38:59,227 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2021-10-24 10:38:59,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-24 10:38:59,227 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:38:59,227 INFO L512 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-10-24 10:38:59,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-10-24 10:38:59,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2021-10-24 10:38:59,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-10-24 10:38:59,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:38:59,839 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-10-24 10:38:59,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:38:59,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1821512688, now seen corresponding path program 1 times [2021-10-24 10:38:59,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:38:59,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1810286462] [2021-10-24 10:38:59,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:38:59,840 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:38:59,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:38:59,841 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:38:59,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-10-24 10:39:00,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:39:00,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 10:39:00,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:39:00,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:39:00,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:39:00,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:39:00,570 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:39:00,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1810286462] [2021-10-24 10:39:00,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1810286462] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:39:00,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1998994057] [2021-10-24 10:39:00,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:39:00,571 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:39:00,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:39:00,572 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:39:00,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-10-24 10:39:01,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:39:01,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 10:39:01,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:39:01,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:39:01,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:39:01,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:39:01,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1998994057] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:39:01,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721283575] [2021-10-24 10:39:01,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:39:01,484 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:39:01,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:39:01,490 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:39:01,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-24 10:39:02,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:39:02,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-24 10:39:02,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:39:02,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-10-24 10:39:02,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:39:02,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:39:03,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:39:03,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721283575] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:39:03,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-24 10:39:03,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [6, 6, 6, 6] total 24 [2021-10-24 10:39:03,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161504297] [2021-10-24 10:39:03,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-24 10:39:03,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:39:03,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-24 10:39:03,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-10-24 10:39:03,413 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 16 states, 15 states have (on average 3.8) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:39:03,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:39:03,925 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2021-10-24 10:39:03,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-24 10:39:03,925 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.8) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-24 10:39:03,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:39:03,926 INFO L225 Difference]: With dead ends: 57 [2021-10-24 10:39:03,926 INFO L226 Difference]: Without dead ends: 57 [2021-10-24 10:39:03,927 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1017.7ms TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2021-10-24 10:39:03,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-24 10:39:03,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-10-24 10:39:03,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 56 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:39:03,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2021-10-24 10:39:03,929 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 30 [2021-10-24 10:39:03,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:39:03,929 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2021-10-24 10:39:03,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.8) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:39:03,930 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2021-10-24 10:39:03,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-24 10:39:03,931 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:39:03,931 INFO L512 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:39:03,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2021-10-24 10:39:04,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-24 10:39:04,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-10-24 10:39:04,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:39:04,535 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-10-24 10:39:04,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:39:04,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1129251155, now seen corresponding path program 1 times [2021-10-24 10:39:04,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:39:04,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523694564] [2021-10-24 10:39:04,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:39:04,536 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:39:04,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:39:04,537 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:39:04,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-10-24 10:39:05,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:39:05,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 10:39:05,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:39:05,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:39:05,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:39:05,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:39:05,274 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:39:05,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523694564] [2021-10-24 10:39:05,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523694564] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:39:05,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1489468082] [2021-10-24 10:39:05,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:39:05,275 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:39:05,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:39:05,278 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:39:05,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2021-10-24 10:39:05,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:39:05,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 10:39:05,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:39:06,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:39:06,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:39:06,168 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:39:06,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1489468082] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:39:06,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944090018] [2021-10-24 10:39:06,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:39:06,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:39:06,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:39:06,169 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:39:06,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-24 10:39:06,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:39:06,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-24 10:39:06,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:39:06,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-10-24 10:39:06,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:39:06,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:39:07,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:39:07,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944090018] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:39:07,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-24 10:39:07,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [6, 6, 6, 6] total 17 [2021-10-24 10:39:07,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881938294] [2021-10-24 10:39:07,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-24 10:39:07,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:39:07,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-24 10:39:07,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-10-24 10:39:07,113 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 9 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:39:07,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:39:07,459 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2021-10-24 10:39:07,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-24 10:39:07,459 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-24 10:39:07,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:39:07,460 INFO L225 Difference]: With dead ends: 59 [2021-10-24 10:39:07,460 INFO L226 Difference]: Without dead ends: 59 [2021-10-24 10:39:07,460 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 193 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 335.3ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-10-24 10:39:07,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-24 10:39:07,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2021-10-24 10:39:07,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 48 states have (on average 1.1875) internal successors, (57), 54 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:39:07,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2021-10-24 10:39:07,461 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 36 [2021-10-24 10:39:07,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:39:07,462 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2021-10-24 10:39:07,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:39:07,462 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2021-10-24 10:39:07,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-24 10:39:07,462 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:39:07,463 INFO L512 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:39:07,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-10-24 10:39:07,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (43)] Ended with exit code 0 [2021-10-24 10:39:07,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-10-24 10:39:08,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:39:08,064 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-10-24 10:39:08,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:39:08,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1129251156, now seen corresponding path program 1 times [2021-10-24 10:39:08,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:39:08,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1130946897] [2021-10-24 10:39:08,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:39:08,065 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:39:08,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:39:08,066 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:39:08,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-10-24 10:39:08,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:39:08,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 10:39:08,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:39:08,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:39:08,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:39:08,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:39:08,888 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:39:08,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1130946897] [2021-10-24 10:39:08,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1130946897] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:39:08,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2036709237] [2021-10-24 10:39:08,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:39:08,888 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:39:08,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:39:08,889 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:39:08,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2021-10-24 10:39:09,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:39:09,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 10:39:09,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:39:09,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:39:09,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:39:09,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:39:09,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2036709237] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:39:09,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998329903] [2021-10-24 10:39:09,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:39:09,828 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:39:09,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:39:09,829 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:39:09,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-10-24 10:39:10,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:39:10,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 10:39:10,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:39:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:39:10,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:39:10,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:39:10,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998329903] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:39:10,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 10:39:10,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-10-24 10:39:10,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5138561] [2021-10-24 10:39:10,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-24 10:39:10,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:39:10,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-24 10:39:10,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-24 10:39:10,620 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:39:10,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:39:10,712 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2021-10-24 10:39:10,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-24 10:39:10,723 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-24 10:39:10,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:39:10,724 INFO L225 Difference]: With dead ends: 59 [2021-10-24 10:39:10,724 INFO L226 Difference]: Without dead ends: 59 [2021-10-24 10:39:10,724 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 126.2ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-10-24 10:39:10,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-24 10:39:10,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-10-24 10:39:10,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 58 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:39:10,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2021-10-24 10:39:10,726 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 36 [2021-10-24 10:39:10,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:39:10,727 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2021-10-24 10:39:10,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:39:10,727 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2021-10-24 10:39:10,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-24 10:39:10,728 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:39:10,728 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:39:10,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2021-10-24 10:39:10,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-10-24 10:39:11,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-10-24 10:39:11,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:39:11,333 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-10-24 10:39:11,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:39:11,333 INFO L82 PathProgramCache]: Analyzing trace with hash 559364180, now seen corresponding path program 2 times [2021-10-24 10:39:11,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:39:11,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1338621170] [2021-10-24 10:39:11,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 10:39:11,334 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:39:11,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:39:11,334 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:39:11,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-10-24 10:39:11,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-24 10:39:11,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:39:11,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-24 10:39:11,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:39:11,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 [2021-10-24 10:39:12,303 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-24 10:39:12,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:39:13,171 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-24 10:39:13,172 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:39:13,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1338621170] [2021-10-24 10:39:13,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1338621170] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:39:13,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:39:13,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 17 [2021-10-24 10:39:13,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476600660] [2021-10-24 10:39:13,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-24 10:39:13,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:39:13,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-24 10:39:13,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-10-24 10:39:13,174 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 18 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:39:13,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:39:13,962 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2021-10-24 10:39:13,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-24 10:39:13,963 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-10-24 10:39:13,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:39:13,963 INFO L225 Difference]: With dead ends: 61 [2021-10-24 10:39:13,963 INFO L226 Difference]: Without dead ends: 61 [2021-10-24 10:39:13,964 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 826.1ms TimeCoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2021-10-24 10:39:13,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-24 10:39:13,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2021-10-24 10:39:13,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 56 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:39:13,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2021-10-24 10:39:13,966 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 40 [2021-10-24 10:39:13,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:39:13,966 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2021-10-24 10:39:13,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:39:13,966 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2021-10-24 10:39:13,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-24 10:39:13,967 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:39:13,967 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:39:13,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2021-10-24 10:39:14,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:39:14,175 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-10-24 10:39:14,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:39:14,175 INFO L82 PathProgramCache]: Analyzing trace with hash 678898265, now seen corresponding path program 1 times [2021-10-24 10:39:14,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:39:14,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1338404318] [2021-10-24 10:39:14,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:39:14,176 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:39:14,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:39:14,176 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:39:14,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-10-24 10:39:14,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:39:14,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-24 10:39:14,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:39:14,965 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:39:14,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:39:15,314 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:39:15,314 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:39:15,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1338404318] [2021-10-24 10:39:15,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1338404318] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:39:15,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1135270857] [2021-10-24 10:39:15,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:39:15,315 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:39:15,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:39:15,345 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:39:15,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2021-10-24 10:39:16,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:39:16,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-24 10:39:16,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:39:16,386 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:39:16,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:39:16,504 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:39:16,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1135270857] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:39:16,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341600875] [2021-10-24 10:39:16,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:39:16,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:39:16,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:39:16,510 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:39:16,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-10-24 10:39:17,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:39:17,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-24 10:39:17,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:39:17,394 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:39:17,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:39:17,502 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:39:17,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341600875] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:39:17,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 10:39:17,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 18 [2021-10-24 10:39:17,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476671987] [2021-10-24 10:39:17,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-24 10:39:17,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:39:17,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-24 10:39:17,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-10-24 10:39:17,504 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:39:18,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:39:18,020 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2021-10-24 10:39:18,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-24 10:39:18,034 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-10-24 10:39:18,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:39:18,035 INFO L225 Difference]: With dead ends: 65 [2021-10-24 10:39:18,035 INFO L226 Difference]: Without dead ends: 65 [2021-10-24 10:39:18,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 641.5ms TimeCoverageRelationStatistics Valid=223, Invalid=377, Unknown=0, NotChecked=0, Total=600 [2021-10-24 10:39:18,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-24 10:39:18,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-10-24 10:39:18,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 64 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:39:18,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2021-10-24 10:39:18,038 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 42 [2021-10-24 10:39:18,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:39:18,038 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2021-10-24 10:39:18,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:39:18,039 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2021-10-24 10:39:18,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-24 10:39:18,039 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:39:18,040 INFO L512 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:39:18,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-10-24 10:39:18,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (50)] Ended with exit code 0 [2021-10-24 10:39:18,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-10-24 10:39:18,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:39:18,666 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-10-24 10:39:18,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:39:18,667 INFO L82 PathProgramCache]: Analyzing trace with hash -307652519, now seen corresponding path program 2 times [2021-10-24 10:39:18,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:39:18,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [200302342] [2021-10-24 10:39:18,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 10:39:18,667 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:39:18,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:39:18,668 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:39:18,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-10-24 10:39:19,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 10:39:19,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:39:19,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-24 10:39:19,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:39:19,881 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:39:19,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:39:20,762 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:39:20,763 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:39:20,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [200302342] [2021-10-24 10:39:20,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [200302342] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:39:20,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [171441772] [2021-10-24 10:39:20,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 10:39:20,763 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:39:20,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:39:20,764 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:39:20,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2021-10-24 10:39:22,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 10:39:22,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:39:22,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-24 10:39:22,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:39:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:39:22,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:39:22,330 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:39:22,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [171441772] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:39:22,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6169997] [2021-10-24 10:39:22,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-24 10:39:22,331 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:39:22,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:39:22,332 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:39:22,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-10-24 10:39:24,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-24 10:39:24,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-24 10:39:24,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-24 10:39:24,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:39:24,380 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:39:24,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:39:24,501 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:39:24,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6169997] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:39:24,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 10:39:24,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18, 18, 18, 18] total 34 [2021-10-24 10:39:24,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427121172] [2021-10-24 10:39:24,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-24 10:39:24,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:39:24,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-24 10:39:24,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2021-10-24 10:39:24,503 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 34 states, 34 states have (on average 2.0) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:39:24,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:39:24,940 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2021-10-24 10:39:24,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-24 10:39:24,946 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-10-24 10:39:24,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:39:24,947 INFO L225 Difference]: With dead ends: 67 [2021-10-24 10:39:24,947 INFO L226 Difference]: Without dead ends: 67 [2021-10-24 10:39:24,947 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 970.9ms TimeCoverageRelationStatistics Valid=250, Invalid=940, Unknown=0, NotChecked=0, Total=1190 [2021-10-24 10:39:24,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-24 10:39:24,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-10-24 10:39:24,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 66 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:39:24,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2021-10-24 10:39:24,950 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 50 [2021-10-24 10:39:24,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:39:24,950 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2021-10-24 10:39:24,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 34 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:39:24,951 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2021-10-24 10:39:24,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-24 10:39:24,951 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:39:24,951 INFO L512 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:39:24,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (52)] Ended with exit code 0 [2021-10-24 10:39:25,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-10-24 10:39:25,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 0 [2021-10-24 10:39:25,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt [2021-10-24 10:39:25,568 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATION (and 22 more)] === [2021-10-24 10:39:25,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:39:25,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1129186265, now seen corresponding path program 3 times [2021-10-24 10:39:25,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:39:25,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1974612038] [2021-10-24 10:39:25,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-24 10:39:25,569 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:39:25,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:39:25,571 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:39:25,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-10-24 10:39:26,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-10-24 10:39:26,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-24 10:39:26,833 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-24 10:39:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 10:39:27,233 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-24 10:39:27,233 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-24 10:39:27,234 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK [2021-10-24 10:39:27,236 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE [2021-10-24 10:39:27,236 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE [2021-10-24 10:39:27,236 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-24 10:39:27,237 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-24 10:39:27,237 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-24 10:39:27,237 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-24 10:39:27,237 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-24 10:39:27,237 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-24 10:39:27,237 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-24 10:39:27,238 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-24 10:39:27,238 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-24 10:39:27,238 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-24 10:39:27,238 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-24 10:39:27,238 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-24 10:39:27,239 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-24 10:39:27,239 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-24 10:39:27,239 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION [2021-10-24 10:39:27,239 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION [2021-10-24 10:39:27,239 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 10:39:27,239 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 10:39:27,240 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 10:39:27,240 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 10:39:27,240 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 10:39:27,240 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE [2021-10-24 10:39:27,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-10-24 10:39:27,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:39:27,486 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 10:39:27,510 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,511 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,511 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,512 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,512 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,512 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,513 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,513 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,513 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,513 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,514 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,514 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,514 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,514 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,515 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,515 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,515 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,516 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,516 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,516 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,516 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,517 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,517 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,517 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,518 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,518 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,518 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,518 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,519 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,519 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,519 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,519 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,520 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,520 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,520 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,521 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,521 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,521 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,521 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,522 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,524 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,524 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,524 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,524 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,525 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,525 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,525 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,534 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,534 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,534 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,535 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,535 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,535 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,535 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,536 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,536 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,536 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,536 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,537 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,537 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,537 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,537 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,538 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,538 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,538 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,539 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,539 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,539 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,539 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,540 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,540 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,540 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,540 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,541 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,541 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,541 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,542 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,542 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,542 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,550 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,551 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,551 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,552 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,552 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,554 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,554 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,554 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,554 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,554 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,555 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,555 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,555 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,555 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,556 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,556 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,556 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,556 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,557 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,557 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,557 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,557 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,558 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,558 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,558 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,558 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,559 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,559 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,559 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,559 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,560 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,560 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,560 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,560 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,561 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,561 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,561 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,561 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,562 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,562 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,562 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,562 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,563 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,563 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,563 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,563 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,564 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,564 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,564 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,564 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,565 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,565 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,565 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,565 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,566 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,566 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,566 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,566 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,567 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,567 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,567 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,567 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,568 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,568 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,568 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,568 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,569 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,569 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,569 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,569 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,570 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled [2021-10-24 10:39:27,570 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,570 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled [2021-10-24 10:39:27,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 10:39:27 BoogieIcfgContainer [2021-10-24 10:39:27,626 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 10:39:27,627 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 10:39:27,627 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 10:39:27,627 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 10:39:27,627 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:38:25" (3/4) ... [2021-10-24 10:39:27,631 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-24 10:39:27,631 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 10:39:27,633 INFO L168 Benchmark]: Toolchain (without parser) took 63694.56 ms. Allocated memory was 58.7 MB in the beginning and 117.4 MB in the end (delta: 58.7 MB). Free memory was 37.7 MB in the beginning and 45.0 MB in the end (delta: -7.4 MB). Peak memory consumption was 51.8 MB. Max. memory is 16.1 GB. [2021-10-24 10:39:27,633 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 58.7 MB. Free memory is still 40.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:39:27,634 INFO L168 Benchmark]: CACSL2BoogieTranslator took 731.17 ms. Allocated memory is still 58.7 MB. Free memory was 37.5 MB in the beginning and 26.5 MB in the end (delta: 11.1 MB). Peak memory consumption was 17.0 MB. Max. memory is 16.1 GB. [2021-10-24 10:39:27,635 INFO L168 Benchmark]: Boogie Procedure Inliner took 98.99 ms. Allocated memory is still 58.7 MB. Free memory was 26.3 MB in the beginning and 23.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:39:27,636 INFO L168 Benchmark]: Boogie Preprocessor took 62.66 ms. Allocated memory was 58.7 MB in the beginning and 79.7 MB in the end (delta: 21.0 MB). Free memory was 23.6 MB in the beginning and 60.7 MB in the end (delta: -37.2 MB). Peak memory consumption was 4.5 MB. Max. memory is 16.1 GB. [2021-10-24 10:39:27,636 INFO L168 Benchmark]: RCFGBuilder took 908.80 ms. Allocated memory is still 79.7 MB. Free memory was 60.7 MB in the beginning and 42.2 MB in the end (delta: 18.6 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-24 10:39:27,637 INFO L168 Benchmark]: TraceAbstraction took 61880.14 ms. Allocated memory was 79.7 MB in the beginning and 117.4 MB in the end (delta: 37.7 MB). Free memory was 41.8 MB in the beginning and 45.0 MB in the end (delta: -3.3 MB). Peak memory consumption was 34.5 MB. Max. memory is 16.1 GB. [2021-10-24 10:39:27,637 INFO L168 Benchmark]: Witness Printer took 5.06 ms. Allocated memory is still 117.4 MB. Free memory is still 45.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:39:27,639 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 58.7 MB. Free memory is still 40.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 731.17 ms. Allocated memory is still 58.7 MB. Free memory was 37.5 MB in the beginning and 26.5 MB in the end (delta: 11.1 MB). Peak memory consumption was 17.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 98.99 ms. Allocated memory is still 58.7 MB. Free memory was 26.3 MB in the beginning and 23.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 62.66 ms. Allocated memory was 58.7 MB in the beginning and 79.7 MB in the end (delta: 21.0 MB). Free memory was 23.6 MB in the beginning and 60.7 MB in the end (delta: -37.2 MB). Peak memory consumption was 4.5 MB. Max. memory is 16.1 GB. * RCFGBuilder took 908.80 ms. Allocated memory is still 79.7 MB. Free memory was 60.7 MB in the beginning and 42.2 MB in the end (delta: 18.6 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 61880.14 ms. Allocated memory was 79.7 MB in the beginning and 117.4 MB in the end (delta: 37.7 MB). Free memory was 41.8 MB in the beginning and 45.0 MB in the end (delta: -3.3 MB). Peak memory consumption was 34.5 MB. Max. memory is 16.1 GB. * Witness Printer took 5.06 ms. Allocated memory is still 117.4 MB. Free memory is still 45.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res : $Pointer$ not handled * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 769]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 769. Possible FailurePath: [L569] struct ldv_list_head ldv_global_msg_list = { &(ldv_global_msg_list), &(ldv_global_msg_list) }; VAL [ldv_global_msg_list={-2147483648:0}] [L764] struct ldv_kobject *kobj; [L740] struct ldv_kobject *kobj; [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L741] kobj = ldv_malloc(sizeof(*kobj)) [L742] COND FALSE !(!kobj) [L730] COND FALSE !(!kobj) [L723] COND FALSE !(!kobj) [L682] ((&kref->refcount)->counter) = (1) VAL [ldv_global_msg_list={-2147483648:0}] [L540] list->next = list VAL [ldv_global_msg_list={-2147483648:0}] [L541] list->prev = list VAL [ldv_global_msg_list={-2147483648:0}] [L746] return kobj; VAL [ldv_global_msg_list={-2147483648:0}] [L765] kobj = ldv_kobject_create() [L717] COND TRUE \read(*kobj) [L657] int temp; VAL [ldv_global_msg_list={-2147483648:0}] [L658] EXPR v->counter VAL [ldv_global_msg_list={-2147483648:0}] [L658] temp = v->counter [L659] temp += i VAL [ldv_global_msg_list={-2147483648:0}] [L660] v->counter = temp VAL [ldv_global_msg_list={-2147483648:0}] [L661] return temp; VAL [ldv_global_msg_list={-2147483648:0}] [L719] return kobj; VAL [ldv_global_msg_list={-2147483648:0}] [L711] COND TRUE \read(*kobj) [L665] int temp; VAL [ldv_global_msg_list={-2147483648:0}] [L666] EXPR v->counter VAL [ldv_global_msg_list={-2147483648:0}] [L666] temp = v->counter [L667] temp -= i VAL [ldv_global_msg_list={-2147483648:0}] [L668] v->counter = temp VAL [ldv_global_msg_list={-2147483648:0}] [L669] return temp; VAL [ldv_global_msg_list={-2147483648:0}] [L674] COND FALSE !((ldv_atomic_sub_return(((int) count), (&kref->refcount)) == 0)) [L678] return 0; VAL [ldv_global_msg_list={-2147483648:0}] [L690] return ldv_kref_sub(kref, 1, release); - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 682]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 682]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 658]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 658]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 660]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 660]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 666]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 666]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 668]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 668]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 699]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 699]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 700]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 700]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 700]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 702]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 702]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 702]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 73 locations, 25 error locations. Started 1 CEGAR loops. OverallTime: 61652.5ms, OverallIterations: 26, TraceHistogramMax: 16, EmptinessCheckTime: 45.8ms, AutomataDifference: 8088.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1797 SDtfs, 5527 SDslu, 3780 SDs, 0 SdLazy, 1986 SolverSat, 108 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4383.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2509 GetRequests, 2109 SyntacticMatches, 20 SemanticMatches, 380 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 9388.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=85occurred in iteration=7, InterpolantAutomatonStates: 190, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 159.0ms AutomataMinimizationTime, 25 MinimizatonAttempts, 845 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 652.2ms SsaConstructionTime, 4758.3ms SatisfiabilityAnalysisTime, 17645.7ms InterpolantComputationTime, 1317 NumberOfCodeBlocks, 1311 NumberOfCodeBlocksAsserted, 65 NumberOfCheckSat, 2424 ConstructedInterpolants, 0 QuantifiedInterpolants, 8836 SizeOfPredicates, 281 NumberOfNonLiveVariables, 6449 ConjunctsInSsa, 475 ConjunctsInUnsatCore, 106 InterpolantComputations, 44 PerfectInterpolantSequences, 120/1026 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-24 10:39:27,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63f717a5-f1ea-4f35-bc7f-fd78c7b448d5/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...