./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW --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 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 14:08:26,096 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:08:26,098 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:08:26,140 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:08:26,140 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:08:26,144 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:08:26,147 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:08:26,150 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:08:26,152 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:08:26,158 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:08:26,159 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:08:26,160 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:08:26,160 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:08:26,161 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:08:26,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:08:26,164 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:08:26,165 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:08:26,166 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:08:26,170 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:08:26,177 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:08:26,179 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:08:26,182 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:08:26,184 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:08:26,185 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:08:26,195 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:08:26,195 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:08:26,196 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:08:26,198 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:08:26,198 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:08:26,199 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:08:26,200 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:08:26,200 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:08:26,202 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:08:26,204 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:08:26,205 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:08:26,205 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:08:26,206 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:08:26,207 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:08:26,208 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:08:26,209 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:08:26,211 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:08:26,211 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-23 14:08:26,252 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:08:26,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:08:26,253 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:08:26,253 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:08:26,254 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:08:26,254 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:08:26,255 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:08:26,255 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:08:26,255 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:08:26,255 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:08:26,257 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:08:26,257 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:08:26,257 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:08:26,257 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:08:26,258 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:08:26,258 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:08:26,258 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:08:26,259 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:08:26,259 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 14:08:26,260 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 14:08:26,260 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:08:26,260 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:08:26,260 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 14:08:26,261 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:08:26,261 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:08:26,261 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:08:26,261 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 14:08:26,262 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 14:08:26,262 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 14:08:26,262 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:08:26,263 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 14:08:26,263 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:08:26,263 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:08:26,264 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:08:26,264 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:08:26,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:08:26,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:08:26,265 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:08:26,265 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:08:26,265 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:08:26,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:08:26,266 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:08:26,266 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 [2022-11-23 14:08:26,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:08:26,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:08:26,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:08:26,587 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:08:26,588 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:08:26,589 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2022-11-23 14:08:29,569 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:08:29,874 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:08:29,884 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2022-11-23 14:08:29,908 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/data/d57012de8/a9ec04fe6029490ca3f5dee4a03d2a10/FLAGb75634dd3 [2022-11-23 14:08:29,927 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/data/d57012de8/a9ec04fe6029490ca3f5dee4a03d2a10 [2022-11-23 14:08:29,931 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:08:29,933 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:08:29,936 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:08:29,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:08:29,941 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:08:29,942 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:08:29" (1/1) ... [2022-11-23 14:08:29,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a718b63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:29, skipping insertion in model container [2022-11-23 14:08:29,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:08:29" (1/1) ... [2022-11-23 14:08:29,953 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:08:30,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:08:30,535 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:08:30,561 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-23 14:08:30,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@587ac7b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:30, skipping insertion in model container [2022-11-23 14:08:30,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:08:30,563 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-23 14:08:30,564 INFO L158 Benchmark]: Toolchain (without parser) took 630.84ms. Allocated memory is still 153.1MB. Free memory was 107.7MB in the beginning and 92.5MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-23 14:08:30,565 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 153.1MB. Free memory is still 96.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 14:08:30,566 INFO L158 Benchmark]: CACSL2BoogieTranslator took 626.64ms. Allocated memory is still 153.1MB. Free memory was 107.3MB in the beginning and 92.5MB in the end (delta: 14.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-23 14:08:30,568 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 153.1MB. Free memory is still 96.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 626.64ms. Allocated memory is still 153.1MB. Free memory was 107.3MB in the beginning and 92.5MB in the end (delta: 14.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW --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 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 14:08:32,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:08:32,753 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:08:32,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:08:32,792 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:08:32,796 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:08:32,799 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:08:32,803 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:08:32,806 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:08:32,808 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:08:32,809 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:08:32,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:08:32,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:08:32,819 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:08:32,820 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:08:32,823 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:08:32,825 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:08:32,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:08:32,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:08:32,831 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:08:32,836 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:08:32,840 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:08:32,843 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:08:32,845 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:08:32,848 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:08:32,853 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:08:32,854 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:08:32,855 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:08:32,856 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:08:32,857 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:08:32,857 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:08:32,858 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:08:32,859 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:08:32,860 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:08:32,862 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:08:32,863 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:08:32,863 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:08:32,864 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:08:32,864 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:08:32,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:08:32,866 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:08:32,867 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-23 14:08:32,909 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:08:32,910 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:08:32,911 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:08:32,911 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:08:32,912 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:08:32,912 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:08:32,912 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:08:32,913 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:08:32,913 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:08:32,913 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:08:32,914 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:08:32,915 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:08:32,915 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 14:08:32,916 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 14:08:32,916 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:08:32,916 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:08:32,916 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 14:08:32,916 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:08:32,917 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:08:32,917 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:08:32,917 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 14:08:32,917 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 14:08:32,917 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 14:08:32,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:08:32,918 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 14:08:32,918 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-23 14:08:32,918 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-23 14:08:32,919 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:08:32,919 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:08:32,919 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:08:32,919 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 14:08:32,920 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:08:32,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:08:32,920 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:08:32,920 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:08:32,921 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-23 14:08:32,921 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-23 14:08:32,921 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:08:32,921 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 14:08:32,921 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_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 [2022-11-23 14:08:33,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:08:33,357 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:08:33,360 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:08:33,361 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:08:33,362 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:08:33,363 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2022-11-23 14:08:36,454 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:08:36,839 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:08:36,840 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2022-11-23 14:08:36,868 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/data/3dc9c37cb/f9249f55a4664ef4849c54df2e5bbf78/FLAG7190569af [2022-11-23 14:08:36,889 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/data/3dc9c37cb/f9249f55a4664ef4849c54df2e5bbf78 [2022-11-23 14:08:36,892 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:08:36,896 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:08:36,900 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:08:36,900 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:08:36,905 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:08:36,906 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:08:36" (1/1) ... [2022-11-23 14:08:36,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@150f2b09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:36, skipping insertion in model container [2022-11-23 14:08:36,907 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:08:36" (1/1) ... [2022-11-23 14:08:36,915 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:08:36,976 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:08:37,515 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:08:37,546 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-23 14:08:37,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:08:37,676 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:08:37,694 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:08:37,769 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:08:37,813 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:08:37,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:37 WrapperNode [2022-11-23 14:08:37,814 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:08:37,815 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:08:37,815 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:08:37,815 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:08:37,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:37" (1/1) ... [2022-11-23 14:08:37,872 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:37" (1/1) ... [2022-11-23 14:08:37,930 INFO L138 Inliner]: procedures = 179, calls = 145, calls flagged for inlining = 33, calls inlined = 20, statements flattened = 332 [2022-11-23 14:08:37,933 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:08:37,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:08:37,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:08:37,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:08:37,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:37" (1/1) ... [2022-11-23 14:08:37,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:37" (1/1) ... [2022-11-23 14:08:37,965 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:37" (1/1) ... [2022-11-23 14:08:37,977 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:37" (1/1) ... [2022-11-23 14:08:37,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:37" (1/1) ... [2022-11-23 14:08:38,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:37" (1/1) ... [2022-11-23 14:08:38,028 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:37" (1/1) ... [2022-11-23 14:08:38,031 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:37" (1/1) ... [2022-11-23 14:08:38,036 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:08:38,037 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:08:38,037 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:08:38,037 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:08:38,038 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:37" (1/1) ... [2022-11-23 14:08:38,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:08:38,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:08:38,075 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:08:38,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:08:38,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-23 14:08:38,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-23 14:08:38,126 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-23 14:08:38,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-23 14:08:38,126 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-23 14:08:38,126 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-23 14:08:38,126 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2022-11-23 14:08:38,127 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2022-11-23 14:08:38,127 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2022-11-23 14:08:38,127 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2022-11-23 14:08:38,127 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-23 14:08:38,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-23 14:08:38,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2022-11-23 14:08:38,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2022-11-23 14:08:38,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 14:08:38,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:08:38,128 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_msg_free [2022-11-23 14:08:38,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_msg_free [2022-11-23 14:08:38,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:08:38,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 14:08:38,129 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2022-11-23 14:08:38,130 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 14:08:38,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-11-23 14:08:38,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:08:38,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 14:08:38,131 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2022-11-23 14:08:38,132 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2022-11-23 14:08:38,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:08:38,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:08:38,463 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:08:38,465 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:08:38,470 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-23 14:08:39,855 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:08:39,863 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:08:39,864 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 14:08:39,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:08:39 BoogieIcfgContainer [2022-11-23 14:08:39,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:08:39,868 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:08:39,868 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:08:39,871 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:08:39,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:08:36" (1/3) ... [2022-11-23 14:08:39,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ccf85be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:08:39, skipping insertion in model container [2022-11-23 14:08:39,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:37" (2/3) ... [2022-11-23 14:08:39,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ccf85be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:08:39, skipping insertion in model container [2022-11-23 14:08:39,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:08:39" (3/3) ... [2022-11-23 14:08:39,881 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test12-2.i [2022-11-23 14:08:39,899 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:08:39,899 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 124 error locations. [2022-11-23 14:08:39,948 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:08:39,954 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@717b1bbc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:08:39,955 INFO L358 AbstractCegarLoop]: Starting to check reachability of 124 error locations. [2022-11-23 14:08:39,960 INFO L276 IsEmpty]: Start isEmpty. Operand has 313 states, 171 states have (on average 1.8654970760233918) internal successors, (319), 294 states have internal predecessors, (319), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-23 14:08:39,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 14:08:39,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:08:39,968 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:08:39,968 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:08:39,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:08:39,973 INFO L85 PathProgramCache]: Analyzing trace with hash -297378988, now seen corresponding path program 1 times [2022-11-23 14:08:39,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:08:39,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013234629] [2022-11-23 14:08:39,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:08:39,987 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:08:39,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:08:39,995 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:08:40,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-23 14:08:40,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:08:40,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 14:08:40,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:08:40,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:08:40,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:08:40,383 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:08:40,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013234629] [2022-11-23 14:08:40,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013234629] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:08:40,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:08:40,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:08:40,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438884043] [2022-11-23 14:08:40,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:08:40,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:08:40,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:08:40,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:08:40,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:08:40,446 INFO L87 Difference]: Start difference. First operand has 313 states, 171 states have (on average 1.8654970760233918) internal successors, (319), 294 states have internal predecessors, (319), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 14:08:41,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:08:41,767 INFO L93 Difference]: Finished difference Result 412 states and 459 transitions. [2022-11-23 14:08:41,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:08:41,770 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-23 14:08:41,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:08:41,789 INFO L225 Difference]: With dead ends: 412 [2022-11-23 14:08:41,795 INFO L226 Difference]: Without dead ends: 408 [2022-11-23 14:08:41,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:08:41,808 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 299 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:08:41,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 506 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-23 14:08:41,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-11-23 14:08:41,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 344. [2022-11-23 14:08:41,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 200 states have (on average 1.83) internal successors, (366), 321 states have internal predecessors, (366), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-11-23 14:08:41,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 402 transitions. [2022-11-23 14:08:41,913 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 402 transitions. Word has length 11 [2022-11-23 14:08:41,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:08:41,913 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 402 transitions. [2022-11-23 14:08:41,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 14:08:41,914 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 402 transitions. [2022-11-23 14:08:41,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 14:08:41,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:08:41,916 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:08:41,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:08:42,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:08:42,128 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:08:42,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:08:42,131 INFO L85 PathProgramCache]: Analyzing trace with hash -297378987, now seen corresponding path program 1 times [2022-11-23 14:08:42,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:08:42,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1759672704] [2022-11-23 14:08:42,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:08:42,135 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:08:42,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:08:42,137 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:08:42,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-23 14:08:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:08:42,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:08:42,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:08:42,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:08:42,387 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:08:42,388 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:08:42,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1759672704] [2022-11-23 14:08:42,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1759672704] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:08:42,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:08:42,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:08:42,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525548402] [2022-11-23 14:08:42,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:08:42,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:08:42,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:08:42,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:08:42,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:08:42,391 INFO L87 Difference]: Start difference. First operand 344 states and 402 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 14:08:43,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:08:43,623 INFO L93 Difference]: Finished difference Result 476 states and 564 transitions. [2022-11-23 14:08:43,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:08:43,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-23 14:08:43,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:08:43,627 INFO L225 Difference]: With dead ends: 476 [2022-11-23 14:08:43,627 INFO L226 Difference]: Without dead ends: 476 [2022-11-23 14:08:43,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:08:43,629 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 131 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:08:43,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 832 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-23 14:08:43,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-11-23 14:08:43,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 407. [2022-11-23 14:08:43,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 256 states have (on average 1.83203125) internal successors, (469), 376 states have internal predecessors, (469), 22 states have call successors, (22), 9 states have call predecessors, (22), 9 states have return successors, (29), 23 states have call predecessors, (29), 22 states have call successors, (29) [2022-11-23 14:08:43,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 520 transitions. [2022-11-23 14:08:43,664 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 520 transitions. Word has length 11 [2022-11-23 14:08:43,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:08:43,664 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 520 transitions. [2022-11-23 14:08:43,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 14:08:43,665 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 520 transitions. [2022-11-23 14:08:43,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 14:08:43,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:08:43,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:08:43,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:08:43,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:08:43,867 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:08:43,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:08:43,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1184882668, now seen corresponding path program 1 times [2022-11-23 14:08:43,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:08:43,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [537421127] [2022-11-23 14:08:43,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:08:43,869 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:08:43,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:08:43,870 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:08:43,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-23 14:08:43,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:08:43,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:08:43,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:08:44,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:08:44,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:08:44,016 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:08:44,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [537421127] [2022-11-23 14:08:44,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [537421127] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:08:44,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:08:44,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:08:44,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229546824] [2022-11-23 14:08:44,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:08:44,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:08:44,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:08:44,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:08:44,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:08:44,019 INFO L87 Difference]: Start difference. First operand 407 states and 520 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 14:08:44,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:08:44,226 INFO L93 Difference]: Finished difference Result 649 states and 797 transitions. [2022-11-23 14:08:44,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:08:44,227 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-11-23 14:08:44,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:08:44,230 INFO L225 Difference]: With dead ends: 649 [2022-11-23 14:08:44,231 INFO L226 Difference]: Without dead ends: 649 [2022-11-23 14:08:44,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:08:44,232 INFO L413 NwaCegarLoop]: 390 mSDtfsCounter, 259 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 1486 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:08:44,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 1486 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:08:44,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-11-23 14:08:44,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 392. [2022-11-23 14:08:44,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 241 states have (on average 1.8215767634854771) internal successors, (439), 362 states have internal predecessors, (439), 21 states have call successors, (21), 9 states have call predecessors, (21), 10 states have return successors, (34), 22 states have call predecessors, (34), 21 states have call successors, (34) [2022-11-23 14:08:44,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 494 transitions. [2022-11-23 14:08:44,261 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 494 transitions. Word has length 11 [2022-11-23 14:08:44,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:08:44,262 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 494 transitions. [2022-11-23 14:08:44,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 14:08:44,262 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 494 transitions. [2022-11-23 14:08:44,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 14:08:44,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:08:44,263 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:08:44,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:08:44,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:08:44,475 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr91REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:08:44,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:08:44,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1981613461, now seen corresponding path program 1 times [2022-11-23 14:08:44,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:08:44,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2095504832] [2022-11-23 14:08:44,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:08:44,476 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:08:44,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:08:44,477 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:08:44,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-23 14:08:44,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:08:44,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:08:44,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:08:44,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:08:44,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:08:44,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:08:44,811 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:08:44,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2095504832] [2022-11-23 14:08:44,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2095504832] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:08:44,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:08:44,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:08:44,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50037897] [2022-11-23 14:08:44,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:08:44,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:08:44,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:08:44,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:08:44,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:08:44,814 INFO L87 Difference]: Start difference. First operand 392 states and 494 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 14:08:46,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:08:46,179 INFO L93 Difference]: Finished difference Result 436 states and 541 transitions. [2022-11-23 14:08:46,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:08:46,183 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-11-23 14:08:46,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:08:46,186 INFO L225 Difference]: With dead ends: 436 [2022-11-23 14:08:46,186 INFO L226 Difference]: Without dead ends: 436 [2022-11-23 14:08:46,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:08:46,187 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 61 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:08:46,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 1152 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-23 14:08:46,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-11-23 14:08:46,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 404. [2022-11-23 14:08:46,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 250 states have (on average 1.804) internal successors, (451), 372 states have internal predecessors, (451), 21 states have call successors, (21), 11 states have call predecessors, (21), 13 states have return successors, (34), 22 states have call predecessors, (34), 21 states have call successors, (34) [2022-11-23 14:08:46,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 506 transitions. [2022-11-23 14:08:46,220 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 506 transitions. Word has length 13 [2022-11-23 14:08:46,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:08:46,221 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 506 transitions. [2022-11-23 14:08:46,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 14:08:46,221 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 506 transitions. [2022-11-23 14:08:46,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 14:08:46,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:08:46,222 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:08:46,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:08:46,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:08:46,444 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr92REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:08:46,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:08:46,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1981613462, now seen corresponding path program 1 times [2022-11-23 14:08:46,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:08:46,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [115477181] [2022-11-23 14:08:46,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:08:46,446 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:08:46,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:08:46,448 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:08:46,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-23 14:08:46,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:08:46,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 14:08:46,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:08:46,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:08:46,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:08:46,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:08:46,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:08:46,834 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:08:46,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [115477181] [2022-11-23 14:08:46,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [115477181] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:08:46,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:08:46,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:08:46,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471897650] [2022-11-23 14:08:46,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:08:46,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:08:46,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:08:46,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:08:46,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:08:46,836 INFO L87 Difference]: Start difference. First operand 404 states and 506 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 14:08:48,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:08:48,519 INFO L93 Difference]: Finished difference Result 424 states and 522 transitions. [2022-11-23 14:08:48,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:08:48,524 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-11-23 14:08:48,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:08:48,526 INFO L225 Difference]: With dead ends: 424 [2022-11-23 14:08:48,526 INFO L226 Difference]: Without dead ends: 424 [2022-11-23 14:08:48,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:08:48,528 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 34 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:08:48,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 1291 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-23 14:08:48,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-11-23 14:08:48,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 413. [2022-11-23 14:08:48,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 259 states have (on average 1.7915057915057915) internal successors, (464), 381 states have internal predecessors, (464), 21 states have call successors, (21), 11 states have call predecessors, (21), 13 states have return successors, (34), 22 states have call predecessors, (34), 21 states have call successors, (34) [2022-11-23 14:08:48,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 519 transitions. [2022-11-23 14:08:48,544 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 519 transitions. Word has length 13 [2022-11-23 14:08:48,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:08:48,544 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 519 transitions. [2022-11-23 14:08:48,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 14:08:48,545 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 519 transitions. [2022-11-23 14:08:48,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 14:08:48,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:08:48,546 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:08:48,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:08:48,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:08:48,757 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr86ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:08:48,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:08:48,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1895308392, now seen corresponding path program 1 times [2022-11-23 14:08:48,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:08:48,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1839358498] [2022-11-23 14:08:48,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:08:48,758 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:08:48,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:08:48,759 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:08:48,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-23 14:08:48,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:08:48,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:08:48,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:08:48,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:08:48,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:08:48,906 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:08:48,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1839358498] [2022-11-23 14:08:48,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1839358498] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:08:48,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:08:48,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:08:48,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716319686] [2022-11-23 14:08:48,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:08:48,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:08:48,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:08:48,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:08:48,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:08:48,908 INFO L87 Difference]: Start difference. First operand 413 states and 519 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:08:49,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:08:49,006 INFO L93 Difference]: Finished difference Result 351 states and 397 transitions. [2022-11-23 14:08:49,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:08:49,007 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-11-23 14:08:49,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:08:49,009 INFO L225 Difference]: With dead ends: 351 [2022-11-23 14:08:49,009 INFO L226 Difference]: Without dead ends: 351 [2022-11-23 14:08:49,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:08:49,010 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 10 mSDsluCounter, 999 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:08:49,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 1342 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:08:49,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-11-23 14:08:49,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 345. [2022-11-23 14:08:49,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 199 states have (on average 1.7688442211055277) internal successors, (352), 320 states have internal predecessors, (352), 16 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (19), 17 states have call predecessors, (19), 16 states have call successors, (19) [2022-11-23 14:08:49,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 387 transitions. [2022-11-23 14:08:49,022 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 387 transitions. Word has length 17 [2022-11-23 14:08:49,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:08:49,023 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 387 transitions. [2022-11-23 14:08:49,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:08:49,023 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 387 transitions. [2022-11-23 14:08:49,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 14:08:49,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:08:49,024 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:08:49,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:08:49,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:08:49,235 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr86ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:08:49,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:08:49,236 INFO L85 PathProgramCache]: Analyzing trace with hash -2106255897, now seen corresponding path program 1 times [2022-11-23 14:08:49,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:08:49,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1526547958] [2022-11-23 14:08:49,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:08:49,236 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:08:49,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:08:49,238 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:08:49,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-23 14:08:49,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:08:49,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:08:49,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:08:49,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:08:49,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:08:49,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:08:49,430 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:08:49,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1526547958] [2022-11-23 14:08:49,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1526547958] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:08:49,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1329080578] [2022-11-23 14:08:49,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:08:49,431 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:08:49,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:08:49,435 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:08:49,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-23 14:08:49,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:08:49,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:08:49,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:08:49,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:08:49,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:08:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:08:49,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1329080578] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:08:49,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172147245] [2022-11-23 14:08:49,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:08:49,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:08:49,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:08:49,683 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:08:49,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 14:08:49,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:08:49,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:08:49,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:08:49,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:08:49,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:08:49,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:08:49,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172147245] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:08:49,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:08:49,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 4 [2022-11-23 14:08:49,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228025524] [2022-11-23 14:08:49,850 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:08:49,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:08:49,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:08:49,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:08:49,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:08:49,852 INFO L87 Difference]: Start difference. First operand 345 states and 387 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:08:49,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:08:49,955 INFO L93 Difference]: Finished difference Result 344 states and 386 transitions. [2022-11-23 14:08:49,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:08:49,956 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-11-23 14:08:49,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:08:49,959 INFO L225 Difference]: With dead ends: 344 [2022-11-23 14:08:49,959 INFO L226 Difference]: Without dead ends: 344 [2022-11-23 14:08:49,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:08:49,960 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 256 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:08:49,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 1052 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:08:49,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-11-23 14:08:49,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2022-11-23 14:08:49,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 199 states have (on average 1.763819095477387) internal successors, (351), 319 states have internal predecessors, (351), 16 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (19), 17 states have call predecessors, (19), 16 states have call successors, (19) [2022-11-23 14:08:49,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 386 transitions. [2022-11-23 14:08:49,973 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 386 transitions. Word has length 17 [2022-11-23 14:08:49,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:08:49,978 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 386 transitions. [2022-11-23 14:08:49,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:08:49,978 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 386 transitions. [2022-11-23 14:08:49,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 14:08:49,981 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:08:49,981 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:08:49,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:08:50,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 14:08:50,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-23 14:08:50,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:08:50,593 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:08:50,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:08:50,593 INFO L85 PathProgramCache]: Analyzing trace with hash -2106256148, now seen corresponding path program 1 times [2022-11-23 14:08:50,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:08:50,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1465819060] [2022-11-23 14:08:50,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:08:50,594 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:08:50,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:08:50,595 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:08:50,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-23 14:08:50,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:08:50,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:08:50,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:08:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:08:50,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:08:50,740 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:08:50,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1465819060] [2022-11-23 14:08:50,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1465819060] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:08:50,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:08:50,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:08:50,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875704625] [2022-11-23 14:08:50,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:08:50,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:08:50,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:08:50,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:08:50,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:08:50,742 INFO L87 Difference]: Start difference. First operand 344 states and 386 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 14:08:50,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:08:50,823 INFO L93 Difference]: Finished difference Result 388 states and 436 transitions. [2022-11-23 14:08:50,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:08:50,824 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-11-23 14:08:50,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:08:50,826 INFO L225 Difference]: With dead ends: 388 [2022-11-23 14:08:50,826 INFO L226 Difference]: Without dead ends: 388 [2022-11-23 14:08:50,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:08:50,827 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 40 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1375 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:08:50,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1375 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:08:50,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-11-23 14:08:50,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 346. [2022-11-23 14:08:50,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 201 states have (on average 1.756218905472637) internal successors, (353), 320 states have internal predecessors, (353), 16 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2022-11-23 14:08:50,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 388 transitions. [2022-11-23 14:08:50,838 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 388 transitions. Word has length 17 [2022-11-23 14:08:50,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:08:50,839 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 388 transitions. [2022-11-23 14:08:50,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 14:08:50,839 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 388 transitions. [2022-11-23 14:08:50,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 14:08:50,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:08:50,840 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:08:50,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-23 14:08:51,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:08:51,051 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:08:51,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:08:51,052 INFO L85 PathProgramCache]: Analyzing trace with hash -2134885299, now seen corresponding path program 1 times [2022-11-23 14:08:51,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:08:51,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [308766009] [2022-11-23 14:08:51,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:08:51,052 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:08:51,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:08:51,053 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:08:51,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-23 14:08:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:08:51,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:08:51,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:08:51,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:08:51,231 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_16 (_ BitVec 1))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_16) |c_#valid|)))) is different from true [2022-11-23 14:08:51,271 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:08:51,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 14:08:51,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-23 14:08:51,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:08:51,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:08:51,489 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:08:51,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [308766009] [2022-11-23 14:08:51,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [308766009] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:08:51,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [680358798] [2022-11-23 14:08:51,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:08:51,490 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:08:51,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:08:51,491 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:08:51,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-23 14:08:51,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:08:51,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 14:08:51,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:08:51,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:08:51,709 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_26 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_26))))) is different from true [2022-11-23 14:08:51,746 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:08:51,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 14:08:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-23 14:08:51,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:08:51,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:08:51,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [680358798] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:08:51,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417063327] [2022-11-23 14:08:51,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:08:51,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:08:51,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:08:51,955 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:08:51,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 14:08:52,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:08:52,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:08:52,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:08:52,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:08:52,113 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_36 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_36))) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-11-23 14:08:52,151 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:08:52,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 14:08:52,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-23 14:08:52,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:08:52,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:08:52,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417063327] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:08:52,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:08:52,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6, 5, 6, 5] total 9 [2022-11-23 14:08:52,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766647651] [2022-11-23 14:08:52,356 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:08:52,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 14:08:52,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:08:52,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 14:08:52,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=33, Unknown=3, NotChecked=36, Total=90 [2022-11-23 14:08:52,358 INFO L87 Difference]: Start difference. First operand 346 states and 388 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:08:54,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:08:54,184 INFO L93 Difference]: Finished difference Result 381 states and 424 transitions. [2022-11-23 14:08:54,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:08:54,185 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 17 [2022-11-23 14:08:54,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:08:54,187 INFO L225 Difference]: With dead ends: 381 [2022-11-23 14:08:54,187 INFO L226 Difference]: Without dead ends: 381 [2022-11-23 14:08:54,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 80 SyntacticMatches, 8 SemanticMatches, 9 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=43, Unknown=3, NotChecked=42, Total=110 [2022-11-23 14:08:54,188 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 191 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 2052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1182 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:08:54,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 1015 Invalid, 2052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 836 Invalid, 0 Unknown, 1182 Unchecked, 1.7s Time] [2022-11-23 14:08:54,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-11-23 14:08:54,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 348. [2022-11-23 14:08:54,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 205 states have (on average 1.7317073170731707) internal successors, (355), 322 states have internal predecessors, (355), 16 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (20), 18 states have call predecessors, (20), 16 states have call successors, (20) [2022-11-23 14:08:54,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 391 transitions. [2022-11-23 14:08:54,199 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 391 transitions. Word has length 17 [2022-11-23 14:08:54,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:08:54,199 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 391 transitions. [2022-11-23 14:08:54,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 5 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:08:54,200 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 391 transitions. [2022-11-23 14:08:54,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 14:08:54,200 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:08:54,201 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:08:54,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 14:08:54,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-23 14:08:54,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-23 14:08:54,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:08:54,807 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:08:54,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:08:54,808 INFO L85 PathProgramCache]: Analyzing trace with hash -2134885298, now seen corresponding path program 1 times [2022-11-23 14:08:54,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:08:54,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [555578271] [2022-11-23 14:08:54,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:08:54,808 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:08:54,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:08:54,810 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:08:54,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-23 14:08:54,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:08:54,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 14:08:54,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:08:54,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:08:54,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:08:55,076 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_47 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_47))))) is different from true [2022-11-23 14:08:55,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:55,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 14:08:55,134 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:08:55,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:08:55,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-23 14:08:55,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:08:58,588 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:08:58,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [555578271] [2022-11-23 14:08:58,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [555578271] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:08:58,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1859949253] [2022-11-23 14:08:58,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:08:58,589 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:08:58,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:08:58,590 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:08:58,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-23 14:08:58,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:08:58,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 14:08:58,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:08:58,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:08:58,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:08:58,867 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_57 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_57))))) is different from true [2022-11-23 14:08:58,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:58,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 14:08:58,906 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:08:58,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:08:58,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-23 14:08:58,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:08:59,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1859949253] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:08:59,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149869206] [2022-11-23 14:08:59,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:08:59,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:08:59,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:08:59,159 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:08:59,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-23 14:08:59,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:08:59,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 14:08:59,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:08:59,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:08:59,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:08:59,375 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_67 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_67) |c_#length|)))) is different from true [2022-11-23 14:08:59,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:08:59,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 14:08:59,411 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:08:59,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:08:59,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-23 14:08:59,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:09:01,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149869206] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:09:01,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:09:01,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2022-11-23 14:09:01,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111549335] [2022-11-23 14:09:01,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:09:01,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 14:09:01,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:09:01,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 14:09:01,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=71, Unknown=4, NotChecked=54, Total=156 [2022-11-23 14:09:01,614 INFO L87 Difference]: Start difference. First operand 348 states and 391 transitions. Second operand has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 14:09:05,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:05,761 INFO L93 Difference]: Finished difference Result 698 states and 811 transitions. [2022-11-23 14:09:05,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:09:05,761 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 17 [2022-11-23 14:09:05,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:05,765 INFO L225 Difference]: With dead ends: 698 [2022-11-23 14:09:05,766 INFO L226 Difference]: Without dead ends: 698 [2022-11-23 14:09:05,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=35, Invalid=105, Unknown=4, NotChecked=66, Total=210 [2022-11-23 14:09:05,767 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 401 mSDsluCounter, 1280 mSDsCounter, 0 mSdLazyCounter, 1789 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 1593 SdHoareTripleChecker+Invalid, 3653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1815 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:05,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 1593 Invalid, 3653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1789 Invalid, 0 Unknown, 1815 Unchecked, 4.0s Time] [2022-11-23 14:09:05,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-11-23 14:09:05,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 360. [2022-11-23 14:09:05,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 215 states have (on average 1.716279069767442) internal successors, (369), 331 states have internal predecessors, (369), 18 states have call successors, (18), 9 states have call predecessors, (18), 12 states have return successors, (30), 21 states have call predecessors, (30), 18 states have call successors, (30) [2022-11-23 14:09:05,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 417 transitions. [2022-11-23 14:09:05,782 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 417 transitions. Word has length 17 [2022-11-23 14:09:05,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:05,783 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 417 transitions. [2022-11-23 14:09:05,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 14:09:05,783 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 417 transitions. [2022-11-23 14:09:05,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-23 14:09:05,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:05,784 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:09:05,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-23 14:09:05,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-23 14:09:06,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-23 14:09:06,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:09:06,387 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr87ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:09:06,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:06,388 INFO L85 PathProgramCache]: Analyzing trace with hash -869422937, now seen corresponding path program 1 times [2022-11-23 14:09:06,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:09:06,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [503834336] [2022-11-23 14:09:06,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:06,388 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:09:06,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:09:06,389 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:09:06,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-23 14:09:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:06,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:09:06,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:09:06,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:06,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:09:06,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:09:06,806 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:09:06,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [503834336] [2022-11-23 14:09:06,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [503834336] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:09:06,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1575317872] [2022-11-23 14:09:06,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:06,806 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:09:06,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:09:06,815 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:09:06,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-23 14:09:06,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:06,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:09:06,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:09:07,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:07,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:09:07,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:09:07,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1575317872] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:09:07,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210317207] [2022-11-23 14:09:07,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:07,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:09:07,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:09:07,055 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:09:07,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-23 14:09:07,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:07,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:09:07,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:09:07,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:07,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:09:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:09:07,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210317207] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:09:07,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:09:07,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 5, 4] total 9 [2022-11-23 14:09:07,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091398454] [2022-11-23 14:09:07,263 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:09:07,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 14:09:07,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:09:07,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 14:09:07,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:09:07,264 INFO L87 Difference]: Start difference. First operand 360 states and 417 transitions. Second operand has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-23 14:09:07,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:07,946 INFO L93 Difference]: Finished difference Result 363 states and 418 transitions. [2022-11-23 14:09:07,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 14:09:07,947 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 18 [2022-11-23 14:09:07,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:07,949 INFO L225 Difference]: With dead ends: 363 [2022-11-23 14:09:07,949 INFO L226 Difference]: Without dead ends: 363 [2022-11-23 14:09:07,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 91 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:09:07,950 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 1112 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1126 SdHoareTripleChecker+Valid, 1214 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:07,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1126 Valid, 1214 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 14:09:07,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-11-23 14:09:07,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 359. [2022-11-23 14:09:07,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 215 states have (on average 1.7069767441860466) internal successors, (367), 330 states have internal predecessors, (367), 18 states have call successors, (18), 9 states have call predecessors, (18), 12 states have return successors, (30), 21 states have call predecessors, (30), 18 states have call successors, (30) [2022-11-23 14:09:07,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 415 transitions. [2022-11-23 14:09:07,960 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 415 transitions. Word has length 18 [2022-11-23 14:09:07,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:07,961 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 415 transitions. [2022-11-23 14:09:07,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-23 14:09:07,961 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 415 transitions. [2022-11-23 14:09:07,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-23 14:09:07,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:07,962 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:09:07,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-23 14:09:08,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-23 14:09:08,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-23 14:09:08,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:09:08,573 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:09:08,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:08,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1883109288, now seen corresponding path program 1 times [2022-11-23 14:09:08,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:09:08,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [78794764] [2022-11-23 14:09:08,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:08,575 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:09:08,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:09:08,576 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:09:08,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-23 14:09:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:08,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:09:08,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:09:08,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:08,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:09:08,728 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:09:08,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [78794764] [2022-11-23 14:09:08,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [78794764] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:09:08,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:09:08,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:09:08,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015095181] [2022-11-23 14:09:08,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:09:08,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:09:08,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:09:08,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:09:08,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:09:08,734 INFO L87 Difference]: Start difference. First operand 359 states and 415 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 14:09:09,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:09,483 INFO L93 Difference]: Finished difference Result 362 states and 417 transitions. [2022-11-23 14:09:09,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:09:09,485 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-11-23 14:09:09,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:09,487 INFO L225 Difference]: With dead ends: 362 [2022-11-23 14:09:09,487 INFO L226 Difference]: Without dead ends: 349 [2022-11-23 14:09:09,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:09:09,488 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 41 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:09,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 661 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 14:09:09,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-11-23 14:09:09,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2022-11-23 14:09:09,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 206 states have (on average 1.733009708737864) internal successors, (357), 321 states have internal predecessors, (357), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (29), 20 states have call predecessors, (29), 18 states have call successors, (29) [2022-11-23 14:09:09,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 404 transitions. [2022-11-23 14:09:09,498 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 404 transitions. Word has length 18 [2022-11-23 14:09:09,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:09,499 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 404 transitions. [2022-11-23 14:09:09,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 14:09:09,499 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 404 transitions. [2022-11-23 14:09:09,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-23 14:09:09,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:09,500 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:09:09,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-23 14:09:09,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:09:09,719 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:09:09,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:09,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1969475052, now seen corresponding path program 1 times [2022-11-23 14:09:09,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:09:09,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [57773707] [2022-11-23 14:09:09,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:09,720 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:09:09,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:09:09,721 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:09:09,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-23 14:09:09,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:09,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 14:09:09,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:09:09,939 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:09:09,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 14:09:10,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:09:10,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:09:10,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:09:10,153 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:09:10,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [57773707] [2022-11-23 14:09:10,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [57773707] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:09:10,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1203621264] [2022-11-23 14:09:10,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:10,154 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:09:10,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:09:10,159 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:09:10,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-23 14:09:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:10,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 14:09:10,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:09:10,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-23 14:09:10,431 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:09:10,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 14:09:10,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:09:10,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:09:10,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:09:10,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1203621264] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:09:10,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017067358] [2022-11-23 14:09:10,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:10,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:09:10,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:09:10,605 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:09:10,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-23 14:09:10,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:10,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 14:09:10,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:09:10,796 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:09:10,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 14:09:10,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:09:10,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:09:10,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:09:10,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017067358] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:09:10,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:09:10,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-11-23 14:09:10,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020324091] [2022-11-23 14:09:10,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:09:10,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:09:10,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:09:10,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:09:10,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:09:10,985 INFO L87 Difference]: Start difference. First operand 349 states and 404 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:09:13,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:13,610 INFO L93 Difference]: Finished difference Result 426 states and 479 transitions. [2022-11-23 14:09:13,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:09:13,610 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-11-23 14:09:13,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:13,612 INFO L225 Difference]: With dead ends: 426 [2022-11-23 14:09:13,612 INFO L226 Difference]: Without dead ends: 426 [2022-11-23 14:09:13,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:09:13,613 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 446 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:13,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 838 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-23 14:09:13,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-11-23 14:09:13,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 351. [2022-11-23 14:09:13,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 208 states have (on average 1.7307692307692308) internal successors, (360), 323 states have internal predecessors, (360), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (29), 20 states have call predecessors, (29), 18 states have call successors, (29) [2022-11-23 14:09:13,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 407 transitions. [2022-11-23 14:09:13,623 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 407 transitions. Word has length 21 [2022-11-23 14:09:13,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:13,624 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 407 transitions. [2022-11-23 14:09:13,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:09:13,624 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 407 transitions. [2022-11-23 14:09:13,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-23 14:09:13,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:13,625 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:09:13,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-23 14:09:13,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-23 14:09:14,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-23 14:09:14,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:09:14,237 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:09:14,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:14,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1969475053, now seen corresponding path program 1 times [2022-11-23 14:09:14,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:09:14,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [513912965] [2022-11-23 14:09:14,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:14,238 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:09:14,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:09:14,239 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:09:14,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-23 14:09:14,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:14,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 14:09:14,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:09:16,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:16,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 14:09:18,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:18,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:09:19,216 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:09:19,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [513912965] [2022-11-23 14:09:19,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [513912965] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:09:19,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1722001278] [2022-11-23 14:09:19,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:19,217 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:09:19,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:09:19,223 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:09:19,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-23 14:09:19,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:19,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 14:09:19,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:09:19,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-23 14:09:21,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:21,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 14:09:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:21,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:09:23,975 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv4 32) |c_~#ldv_global_msg_list~0.offset|))) (and (forall ((|v_ldv_malloc_#res.base_106| (_ BitVec 32))) (or (forall ((v_ArrVal_105 (_ BitVec 32))) (bvule .cse0 (select (store |c_#length| |v_ldv_malloc_#res.base_106| v_ArrVal_105) |c_~#ldv_global_msg_list~0.base|))) (not (= (select |c_#valid| |v_ldv_malloc_#res.base_106|) (_ bv0 1))))) (or (forall ((|v_ldv_malloc_#res.base_106| (_ BitVec 32))) (not (= (select |c_#valid| |v_ldv_malloc_#res.base_106|) (_ bv0 1)))) (bvule |c_~#ldv_global_msg_list~0.offset| .cse0)))) is different from false [2022-11-23 14:09:23,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1722001278] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:09:23,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642798681] [2022-11-23 14:09:23,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:23,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:09:23,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:09:23,980 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:09:23,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-23 14:09:24,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:24,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 14:09:24,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:09:26,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:26,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 14:09:26,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:26,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:09:28,661 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd (_ bv4 32) |c_~#ldv_global_msg_list~0.offset|))) (and (forall ((|v_ldv_malloc_#res.base_113| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_ldv_malloc_#res.base_113|) (_ bv0 1))) (forall ((v_ArrVal_112 (_ BitVec 32))) (bvule .cse0 (select (store |c_#length| |v_ldv_malloc_#res.base_113| v_ArrVal_112) |c_~#ldv_global_msg_list~0.base|))))) (or (forall ((|v_ldv_malloc_#res.base_113| (_ BitVec 32))) (not (= (select |c_#valid| |v_ldv_malloc_#res.base_113|) (_ bv0 1)))) (bvule |c_~#ldv_global_msg_list~0.offset| .cse0)))) is different from false [2022-11-23 14:09:28,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642798681] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:09:28,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:09:28,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-11-23 14:09:28,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006829479] [2022-11-23 14:09:28,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:09:28,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:09:28,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:09:28,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:09:28,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=62, Unknown=5, NotChecked=34, Total=132 [2022-11-23 14:09:28,667 INFO L87 Difference]: Start difference. First operand 351 states and 407 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:09:33,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:09:37,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:09:39,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:09:41,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:09:43,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:09:45,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:09:47,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:09:55,920 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:09:57,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:09:59,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:59,263 INFO L93 Difference]: Finished difference Result 419 states and 472 transitions. [2022-11-23 14:09:59,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 14:09:59,264 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-11-23 14:09:59,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:59,266 INFO L225 Difference]: With dead ends: 419 [2022-11-23 14:09:59,266 INFO L226 Difference]: Without dead ends: 419 [2022-11-23 14:09:59,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=8, NotChecked=58, Total=306 [2022-11-23 14:09:59,267 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 528 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 67 mSolverCounterUnsat, 153 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 153 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:59,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 436 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 564 Invalid, 153 Unknown, 0 Unchecked, 20.3s Time] [2022-11-23 14:09:59,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-11-23 14:09:59,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 350. [2022-11-23 14:09:59,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 208 states have (on average 1.7211538461538463) internal successors, (358), 322 states have internal predecessors, (358), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (29), 20 states have call predecessors, (29), 18 states have call successors, (29) [2022-11-23 14:09:59,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 405 transitions. [2022-11-23 14:09:59,277 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 405 transitions. Word has length 21 [2022-11-23 14:09:59,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:59,277 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 405 transitions. [2022-11-23 14:09:59,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:09:59,278 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 405 transitions. [2022-11-23 14:09:59,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-23 14:09:59,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:59,278 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:09:59,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-23 14:09:59,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-11-23 14:09:59,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-11-23 14:09:59,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:09:59,890 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr91REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:09:59,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:59,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1415040467, now seen corresponding path program 1 times [2022-11-23 14:09:59,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:09:59,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772011810] [2022-11-23 14:09:59,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:59,891 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:09:59,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:09:59,892 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:09:59,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-23 14:09:59,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:59,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:09:59,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:00,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:10:00,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:10:00,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:10:00,087 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:10:00,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772011810] [2022-11-23 14:10:00,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1772011810] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:10:00,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:10:00,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:10:00,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087183092] [2022-11-23 14:10:00,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:10:00,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:10:00,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:10:00,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:10:00,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:10:00,089 INFO L87 Difference]: Start difference. First operand 350 states and 405 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 14:10:01,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:10:01,338 INFO L93 Difference]: Finished difference Result 390 states and 447 transitions. [2022-11-23 14:10:01,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:10:01,339 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-11-23 14:10:01,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:10:01,341 INFO L225 Difference]: With dead ends: 390 [2022-11-23 14:10:01,341 INFO L226 Difference]: Without dead ends: 390 [2022-11-23 14:10:01,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:10:01,342 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 59 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:10:01,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 1036 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-23 14:10:01,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-11-23 14:10:01,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 352. [2022-11-23 14:10:01,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 210 states have (on average 1.7190476190476192) internal successors, (361), 324 states have internal predecessors, (361), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (29), 20 states have call predecessors, (29), 18 states have call successors, (29) [2022-11-23 14:10:01,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 408 transitions. [2022-11-23 14:10:01,351 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 408 transitions. Word has length 23 [2022-11-23 14:10:01,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:01,352 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 408 transitions. [2022-11-23 14:10:01,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 14:10:01,352 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 408 transitions. [2022-11-23 14:10:01,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-23 14:10:01,353 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:01,353 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:10:01,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-23 14:10:01,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:10:01,565 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr92REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:10:01,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:01,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1415040466, now seen corresponding path program 1 times [2022-11-23 14:10:01,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:10:01,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2087658887] [2022-11-23 14:10:01,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:01,566 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:10:01,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:10:01,567 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:10:01,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-23 14:10:01,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:01,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 14:10:01,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:01,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:10:01,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:10:02,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:10:02,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:10:02,026 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:10:02,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2087658887] [2022-11-23 14:10:02,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2087658887] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:10:02,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:10:02,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:10:02,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280761458] [2022-11-23 14:10:02,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:10:02,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:10:02,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:10:02,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:10:02,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:10:02,028 INFO L87 Difference]: Start difference. First operand 352 states and 408 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 14:10:03,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:10:03,216 INFO L93 Difference]: Finished difference Result 375 states and 432 transitions. [2022-11-23 14:10:03,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:10:03,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-11-23 14:10:03,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:10:03,219 INFO L225 Difference]: With dead ends: 375 [2022-11-23 14:10:03,219 INFO L226 Difference]: Without dead ends: 375 [2022-11-23 14:10:03,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:10:03,220 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 41 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1075 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:10:03,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 1075 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-23 14:10:03,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-11-23 14:10:03,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 352. [2022-11-23 14:10:03,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 210 states have (on average 1.7142857142857142) internal successors, (360), 324 states have internal predecessors, (360), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (29), 20 states have call predecessors, (29), 18 states have call successors, (29) [2022-11-23 14:10:03,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 407 transitions. [2022-11-23 14:10:03,231 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 407 transitions. Word has length 23 [2022-11-23 14:10:03,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:03,231 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 407 transitions. [2022-11-23 14:10:03,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 14:10:03,232 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 407 transitions. [2022-11-23 14:10:03,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 14:10:03,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:03,232 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:10:03,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-23 14:10:03,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:10:03,443 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr83ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:10:03,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:03,444 INFO L85 PathProgramCache]: Analyzing trace with hash -412937067, now seen corresponding path program 1 times [2022-11-23 14:10:03,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:10:03,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [901951895] [2022-11-23 14:10:03,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:03,444 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:10:03,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:10:03,445 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:10:03,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-23 14:10:03,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:03,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:10:03,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:03,586 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:10:03,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:10:03,634 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:10:03,634 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:10:03,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [901951895] [2022-11-23 14:10:03,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [901951895] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:10:03,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1311416977] [2022-11-23 14:10:03,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:03,635 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:10:03,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:10:03,636 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:10:03,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-23 14:10:03,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:03,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:10:03,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:03,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:10:03,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:10:03,871 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:10:03,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1311416977] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:10:03,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708760390] [2022-11-23 14:10:03,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:03,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:03,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:10:03,873 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:10:03,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-23 14:10:03,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:03,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:10:03,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:10:04,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:10:04,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:10:04,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708760390] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:10:04,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:10:04,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 4 [2022-11-23 14:10:04,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902970823] [2022-11-23 14:10:04,092 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:10:04,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:10:04,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:10:04,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:10:04,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:10:04,093 INFO L87 Difference]: Start difference. First operand 352 states and 407 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 14:10:04,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:10:04,187 INFO L93 Difference]: Finished difference Result 351 states and 406 transitions. [2022-11-23 14:10:04,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:10:04,188 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-11-23 14:10:04,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:10:04,189 INFO L225 Difference]: With dead ends: 351 [2022-11-23 14:10:04,190 INFO L226 Difference]: Without dead ends: 351 [2022-11-23 14:10:04,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:10:04,190 INFO L413 NwaCegarLoop]: 329 mSDtfsCounter, 245 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:10:04,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 1046 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:10:04,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-11-23 14:10:04,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2022-11-23 14:10:04,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 210 states have (on average 1.7095238095238094) internal successors, (359), 323 states have internal predecessors, (359), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (29), 20 states have call predecessors, (29), 18 states have call successors, (29) [2022-11-23 14:10:04,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 406 transitions. [2022-11-23 14:10:04,200 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 406 transitions. Word has length 25 [2022-11-23 14:10:04,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:04,201 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 406 transitions. [2022-11-23 14:10:04,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 14:10:04,201 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 406 transitions. [2022-11-23 14:10:04,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 14:10:04,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:04,202 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:10:04,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-11-23 14:10:04,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-11-23 14:10:04,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-11-23 14:10:04,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:04,804 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:10:04,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:04,805 INFO L85 PathProgramCache]: Analyzing trace with hash -412937301, now seen corresponding path program 1 times [2022-11-23 14:10:04,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:10:04,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1610775436] [2022-11-23 14:10:04,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:04,805 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:10:04,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:10:04,806 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:10:04,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-23 14:10:04,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:04,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:10:04,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:04,985 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:10:04,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:10:04,985 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:10:04,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1610775436] [2022-11-23 14:10:04,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1610775436] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:10:04,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:10:04,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:10:04,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870279300] [2022-11-23 14:10:04,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:10:04,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:10:04,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:10:04,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:10:04,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:10:04,987 INFO L87 Difference]: Start difference. First operand 351 states and 406 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 14:10:05,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:10:05,069 INFO L93 Difference]: Finished difference Result 392 states and 444 transitions. [2022-11-23 14:10:05,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:10:05,070 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2022-11-23 14:10:05,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:10:05,072 INFO L225 Difference]: With dead ends: 392 [2022-11-23 14:10:05,072 INFO L226 Difference]: Without dead ends: 392 [2022-11-23 14:10:05,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:10:05,072 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 43 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 1426 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:10:05,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 1426 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:10:05,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-11-23 14:10:05,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 349. [2022-11-23 14:10:05,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 209 states have (on average 1.6985645933014355) internal successors, (355), 321 states have internal predecessors, (355), 17 states have call successors, (17), 9 states have call predecessors, (17), 11 states have return successors, (27), 20 states have call predecessors, (27), 17 states have call successors, (27) [2022-11-23 14:10:05,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 399 transitions. [2022-11-23 14:10:05,087 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 399 transitions. Word has length 25 [2022-11-23 14:10:05,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:05,088 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 399 transitions. [2022-11-23 14:10:05,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 14:10:05,088 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 399 transitions. [2022-11-23 14:10:05,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 14:10:05,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:05,094 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:10:05,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-23 14:10:05,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:10:05,305 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:10:05,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:05,306 INFO L85 PathProgramCache]: Analyzing trace with hash -441566452, now seen corresponding path program 1 times [2022-11-23 14:10:05,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:10:05,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1791124143] [2022-11-23 14:10:05,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:05,306 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:10:05,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:10:05,307 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:10:05,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-23 14:10:05,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:05,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:10:05,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:05,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:10:05,488 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| (_ bv1 1)) |c_#valid|)) is different from true [2022-11-23 14:10:05,512 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:10:05,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:10:05,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 2 not checked. [2022-11-23 14:10:05,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:10:05,751 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:10:05,751 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:10:05,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1791124143] [2022-11-23 14:10:05,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1791124143] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:10:05,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [750781952] [2022-11-23 14:10:05,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:05,752 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:10:05,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:10:05,755 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:10:05,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-23 14:10:05,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:05,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 14:10:05,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:05,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:10:06,007 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_188 (_ BitVec 1))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_188) |c_#valid|)))) is different from true [2022-11-23 14:10:06,048 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:10:06,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 14:10:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 2 not checked. [2022-11-23 14:10:06,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:10:06,311 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:10:06,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [750781952] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:10:06,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879057781] [2022-11-23 14:10:06,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:06,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:06,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:10:06,315 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:10:06,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-23 14:10:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:06,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:10:06,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:06,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:10:06,488 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_206 (_ BitVec 1))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_206) |c_#valid|)))) is different from true [2022-11-23 14:10:06,529 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:10:06,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 14:10:06,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 2 not checked. [2022-11-23 14:10:06,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:10:06,746 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:10:06,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879057781] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:10:06,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:10:06,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6, 5, 6, 5] total 9 [2022-11-23 14:10:06,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046325634] [2022-11-23 14:10:06,747 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:10:06,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 14:10:06,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:10:06,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 14:10:06,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=33, Unknown=3, NotChecked=36, Total=90 [2022-11-23 14:10:06,748 INFO L87 Difference]: Start difference. First operand 349 states and 399 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 14:10:10,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:10:10,794 INFO L93 Difference]: Finished difference Result 379 states and 425 transitions. [2022-11-23 14:10:10,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:10:10,794 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 25 [2022-11-23 14:10:10,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:10:10,795 INFO L225 Difference]: With dead ends: 379 [2022-11-23 14:10:10,796 INFO L226 Difference]: Without dead ends: 379 [2022-11-23 14:10:10,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 127 SyntacticMatches, 9 SemanticMatches, 9 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=22, Invalid=43, Unknown=3, NotChecked=42, Total=110 [2022-11-23 14:10:10,796 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 183 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 2002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1151 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:10:10,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 1016 Invalid, 2002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 821 Invalid, 0 Unknown, 1151 Unchecked, 2.0s Time] [2022-11-23 14:10:10,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-11-23 14:10:10,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 351. [2022-11-23 14:10:10,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 212 states have (on average 1.6886792452830188) internal successors, (358), 323 states have internal predecessors, (358), 17 states have call successors, (17), 9 states have call predecessors, (17), 11 states have return successors, (27), 20 states have call predecessors, (27), 17 states have call successors, (27) [2022-11-23 14:10:10,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 402 transitions. [2022-11-23 14:10:10,805 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 402 transitions. Word has length 25 [2022-11-23 14:10:10,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:10,805 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 402 transitions. [2022-11-23 14:10:10,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 14:10:10,806 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 402 transitions. [2022-11-23 14:10:10,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 14:10:10,806 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:10,806 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:10:10,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-23 14:10:11,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-23 14:10:11,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-11-23 14:10:11,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:10:11,418 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:10:11,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:11,418 INFO L85 PathProgramCache]: Analyzing trace with hash -441566451, now seen corresponding path program 1 times [2022-11-23 14:10:11,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:10:11,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551334657] [2022-11-23 14:10:11,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:11,419 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:10:11,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:10:11,421 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:10:11,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-23 14:10:11,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:11,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-23 14:10:11,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:11,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:10:11,718 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| |c_ldv_malloc_#in~size|) |c_#length|)) is different from true [2022-11-23 14:10:11,754 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 14:10:11,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 14:10:11,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-11-23 14:10:11,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:10:12,118 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:10:12,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551334657] [2022-11-23 14:10:12,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [551334657] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:10:12,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1392544888] [2022-11-23 14:10:12,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:12,119 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:10:12,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:10:12,120 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:10:12,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-23 14:10:12,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:12,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 14:10:12,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:12,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:10:12,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:10:12,589 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_240 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_240) |c_#length|)))) is different from true [2022-11-23 14:10:12,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:12,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 14:10:12,641 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:10:12,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:10:12,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-11-23 14:10:12,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:10:13,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1392544888] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:10:13,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225588608] [2022-11-23 14:10:13,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:13,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:13,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:10:13,809 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:10:13,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-23 14:10:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:13,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 14:10:13,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:13,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:10:13,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:10:14,062 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_258 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_258) |c_#length|)))) is different from true [2022-11-23 14:10:14,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:14,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 14:10:14,111 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:10:14,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:10:14,129 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-11-23 14:10:14,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:10:14,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225588608] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:10:14,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:10:14,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-11-23 14:10:14,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211803355] [2022-11-23 14:10:14,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:10:14,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 14:10:14,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:10:14,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 14:10:14,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=174, Unknown=3, NotChecked=84, Total=306 [2022-11-23 14:10:14,401 INFO L87 Difference]: Start difference. First operand 351 states and 402 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-23 14:10:21,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:10:21,779 INFO L93 Difference]: Finished difference Result 681 states and 789 transitions. [2022-11-23 14:10:21,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:10:21,781 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 25 [2022-11-23 14:10:21,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:10:21,784 INFO L225 Difference]: With dead ends: 681 [2022-11-23 14:10:21,784 INFO L226 Difference]: Without dead ends: 681 [2022-11-23 14:10:21,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=56, Invalid=225, Unknown=3, NotChecked=96, Total=380 [2022-11-23 14:10:21,785 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 525 mSDsluCounter, 2246 mSDsCounter, 0 mSdLazyCounter, 2778 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 2590 SdHoareTripleChecker+Invalid, 4502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 2778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1668 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:10:21,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 2590 Invalid, 4502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 2778 Invalid, 0 Unknown, 1668 Unchecked, 7.1s Time] [2022-11-23 14:10:21,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-11-23 14:10:21,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 350. [2022-11-23 14:10:21,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 212 states have (on average 1.6839622641509433) internal successors, (357), 322 states have internal predecessors, (357), 17 states have call successors, (17), 9 states have call predecessors, (17), 11 states have return successors, (27), 20 states have call predecessors, (27), 17 states have call successors, (27) [2022-11-23 14:10:21,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 401 transitions. [2022-11-23 14:10:21,797 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 401 transitions. Word has length 25 [2022-11-23 14:10:21,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:21,797 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 401 transitions. [2022-11-23 14:10:21,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-23 14:10:21,797 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 401 transitions. [2022-11-23 14:10:21,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-23 14:10:21,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:21,798 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:10:21,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-11-23 14:10:22,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-11-23 14:10:22,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-11-23 14:10:22,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:10:22,401 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr84ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:10:22,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:22,402 INFO L85 PathProgramCache]: Analyzing trace with hash 83853234, now seen corresponding path program 1 times [2022-11-23 14:10:22,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:10:22,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1054808287] [2022-11-23 14:10:22,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:22,402 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:10:22,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:10:22,404 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:10:22,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-23 14:10:22,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:22,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:10:22,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:22,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:10:22,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:10:23,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:10:23,144 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:10:23,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1054808287] [2022-11-23 14:10:23,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1054808287] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:10:23,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [887716442] [2022-11-23 14:10:23,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:23,145 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:10:23,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:10:23,146 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:10:23,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-23 14:10:23,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:23,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:10:23,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:10:23,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:10:23,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:10:23,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [887716442] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:10:23,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6836541] [2022-11-23 14:10:23,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:23,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:23,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:10:23,438 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:10:23,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-23 14:10:23,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:23,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:10:23,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:23,606 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:10:23,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:10:23,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:10:23,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6836541] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:10:23,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:10:23,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 5, 4] total 9 [2022-11-23 14:10:23,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130363378] [2022-11-23 14:10:23,667 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:10:23,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 14:10:23,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:10:23,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 14:10:23,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:10:23,668 INFO L87 Difference]: Start difference. First operand 350 states and 401 transitions. Second operand has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-23 14:10:24,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:10:24,726 INFO L93 Difference]: Finished difference Result 349 states and 399 transitions. [2022-11-23 14:10:24,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:10:24,727 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 26 [2022-11-23 14:10:24,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:10:24,728 INFO L225 Difference]: With dead ends: 349 [2022-11-23 14:10:24,728 INFO L226 Difference]: Without dead ends: 349 [2022-11-23 14:10:24,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 139 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:10:24,729 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 1081 mSDsluCounter, 1150 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 1444 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:10:24,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1095 Valid, 1444 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 14:10:24,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-11-23 14:10:24,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2022-11-23 14:10:24,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 212 states have (on average 1.6745283018867925) internal successors, (355), 321 states have internal predecessors, (355), 17 states have call successors, (17), 9 states have call predecessors, (17), 11 states have return successors, (27), 20 states have call predecessors, (27), 17 states have call successors, (27) [2022-11-23 14:10:24,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 399 transitions. [2022-11-23 14:10:24,737 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 399 transitions. Word has length 26 [2022-11-23 14:10:24,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:24,738 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 399 transitions. [2022-11-23 14:10:24,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-23 14:10:24,738 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 399 transitions. [2022-11-23 14:10:24,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-23 14:10:24,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:24,739 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:10:24,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-11-23 14:10:24,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-23 14:10:25,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-11-23 14:10:25,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:25,342 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr93REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:10:25,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:25,342 INFO L85 PathProgramCache]: Analyzing trace with hash -366162574, now seen corresponding path program 1 times [2022-11-23 14:10:25,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:10:25,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1139308177] [2022-11-23 14:10:25,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:25,343 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:10:25,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:10:25,344 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:10:25,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-23 14:10:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:25,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 14:10:25,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:25,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:10:25,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:10:25,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:10:25,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:10:25,856 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:10:25,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1139308177] [2022-11-23 14:10:25,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1139308177] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:10:25,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:10:25,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:10:25,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133062190] [2022-11-23 14:10:25,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:10:25,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:10:25,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:10:25,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:10:25,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:10:25,858 INFO L87 Difference]: Start difference. First operand 349 states and 399 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 14:10:26,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:10:26,375 INFO L93 Difference]: Finished difference Result 355 states and 404 transitions. [2022-11-23 14:10:26,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:10:26,376 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-11-23 14:10:26,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:10:26,377 INFO L225 Difference]: With dead ends: 355 [2022-11-23 14:10:26,377 INFO L226 Difference]: Without dead ends: 355 [2022-11-23 14:10:26,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:10:26,378 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 13 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1236 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:10:26,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1236 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:10:26,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-11-23 14:10:26,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 351. [2022-11-23 14:10:26,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 214 states have (on average 1.6682242990654206) internal successors, (357), 323 states have internal predecessors, (357), 17 states have call successors, (17), 9 states have call predecessors, (17), 11 states have return successors, (27), 20 states have call predecessors, (27), 17 states have call successors, (27) [2022-11-23 14:10:26,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 401 transitions. [2022-11-23 14:10:26,386 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 401 transitions. Word has length 26 [2022-11-23 14:10:26,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:26,386 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 401 transitions. [2022-11-23 14:10:26,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 14:10:26,387 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 401 transitions. [2022-11-23 14:10:26,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-23 14:10:26,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:26,388 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:10:26,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-23 14:10:26,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:10:26,599 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:10:26,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:26,599 INFO L85 PathProgramCache]: Analyzing trace with hash 305064464, now seen corresponding path program 1 times [2022-11-23 14:10:26,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:10:26,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1932522983] [2022-11-23 14:10:26,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:26,600 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:10:26,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:10:26,601 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:10:26,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-23 14:10:26,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:26,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 14:10:26,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:26,904 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_entry_point_~client~0#1.base| (_ BitVec 32))) (and (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 1))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base|)))) is different from true [2022-11-23 14:10:26,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:10:26,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:10:27,146 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret65#1.base_55| (_ BitVec 32))) (or (= |c_ULTIMATE.start_main_old_#valid#1| (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret65#1.base_55| (_ bv0 1))) (not (= (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret65#1.base_55|) (_ bv0 1))))) is different from false [2022-11-23 14:10:27,148 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:10:27,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1932522983] [2022-11-23 14:10:27,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1932522983] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:10:27,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [687063550] [2022-11-23 14:10:27,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:27,149 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:10:27,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:10:27,151 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:10:27,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-23 14:10:27,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:27,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 14:10:27,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:27,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:10:27,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:10:27,906 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret65#1.base_58| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret65#1.base_58|) (_ bv0 1))) (= |c_ULTIMATE.start_main_old_#valid#1| (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret65#1.base_58| (_ bv0 1))))) is different from false [2022-11-23 14:10:27,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [687063550] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:10:27,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882281554] [2022-11-23 14:10:27,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:27,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:27,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:10:27,911 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:10:27,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-23 14:10:28,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:28,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 14:10:28,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:28,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:10:28,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:10:28,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:10:28,428 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret65#1.base_61| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret65#1.base_61|))) (= (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret65#1.base_61| (_ bv0 1)) |c_ULTIMATE.start_main_old_#valid#1|))) is different from false [2022-11-23 14:10:28,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882281554] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:10:28,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:10:28,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 14 [2022-11-23 14:10:28,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448492072] [2022-11-23 14:10:28,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:10:28,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 14:10:28,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:10:28,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 14:10:28,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=149, Unknown=4, NotChecked=108, Total=306 [2022-11-23 14:10:28,433 INFO L87 Difference]: Start difference. First operand 351 states and 401 transitions. Second operand has 15 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-23 14:10:31,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:10:31,926 INFO L93 Difference]: Finished difference Result 363 states and 412 transitions. [2022-11-23 14:10:31,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 14:10:31,927 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 28 [2022-11-23 14:10:31,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:10:31,929 INFO L225 Difference]: With dead ends: 363 [2022-11-23 14:10:31,929 INFO L226 Difference]: Without dead ends: 347 [2022-11-23 14:10:31,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 125 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 4 IntricatePredicates, 2 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=310, Unknown=4, NotChecked=156, Total=552 [2022-11-23 14:10:31,929 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 372 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 52 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 1470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 341 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:10:31,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 1193 Invalid, 1470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1076 Invalid, 1 Unknown, 341 Unchecked, 3.3s Time] [2022-11-23 14:10:31,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-11-23 14:10:31,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 345. [2022-11-23 14:10:31,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 209 states have (on average 1.6794258373205742) internal successors, (351), 319 states have internal predecessors, (351), 17 states have call successors, (17), 8 states have call predecessors, (17), 10 states have return successors, (26), 19 states have call predecessors, (26), 17 states have call successors, (26) [2022-11-23 14:10:31,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 394 transitions. [2022-11-23 14:10:31,938 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 394 transitions. Word has length 28 [2022-11-23 14:10:31,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:31,938 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 394 transitions. [2022-11-23 14:10:31,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-23 14:10:31,938 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 394 transitions. [2022-11-23 14:10:31,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-23 14:10:31,939 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:31,939 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:10:31,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-23 14:10:32,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2022-11-23 14:10:32,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-11-23 14:10:32,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:10:32,545 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:10:32,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:32,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1048245233, now seen corresponding path program 1 times [2022-11-23 14:10:32,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:10:32,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [105766304] [2022-11-23 14:10:32,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:32,546 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:10:32,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:10:32,548 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:10:32,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-23 14:10:32,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:32,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:10:32,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:32,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:10:32,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:10:32,700 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:10:32,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [105766304] [2022-11-23 14:10:32,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [105766304] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:10:32,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:10:32,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:10:32,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025834026] [2022-11-23 14:10:32,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:10:32,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:10:32,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:10:32,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:10:32,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:10:32,702 INFO L87 Difference]: Start difference. First operand 345 states and 394 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 14:10:32,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:10:32,776 INFO L93 Difference]: Finished difference Result 336 states and 384 transitions. [2022-11-23 14:10:32,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:10:32,777 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-11-23 14:10:32,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:10:32,778 INFO L225 Difference]: With dead ends: 336 [2022-11-23 14:10:32,778 INFO L226 Difference]: Without dead ends: 336 [2022-11-23 14:10:32,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:10:32,779 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 245 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 1053 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:10:32,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 1053 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:10:32,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-11-23 14:10:32,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 336. [2022-11-23 14:10:32,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 200 states have (on average 1.705) internal successors, (341), 310 states have internal predecessors, (341), 17 states have call successors, (17), 8 states have call predecessors, (17), 10 states have return successors, (26), 19 states have call predecessors, (26), 17 states have call successors, (26) [2022-11-23 14:10:32,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 384 transitions. [2022-11-23 14:10:32,787 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 384 transitions. Word has length 28 [2022-11-23 14:10:32,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:32,788 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 384 transitions. [2022-11-23 14:10:32,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 14:10:32,788 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 384 transitions. [2022-11-23 14:10:32,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-23 14:10:32,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:32,789 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:10:32,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-23 14:10:33,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:10:33,000 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr88ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:10:33,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:33,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1975256279, now seen corresponding path program 1 times [2022-11-23 14:10:33,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:10:33,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [81631104] [2022-11-23 14:10:33,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:33,002 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:10:33,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:10:33,003 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:10:33,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-23 14:10:33,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:33,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 14:10:33,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:33,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:10:33,207 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:10:33,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:10:33,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:10:33,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:10:33,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:10:33,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-23 14:10:33,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:10:33,786 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:10:33,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [81631104] [2022-11-23 14:10:33,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [81631104] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:10:33,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [110687461] [2022-11-23 14:10:33,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:33,786 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:10:33,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:10:33,791 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:10:33,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-11-23 14:10:33,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:33,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 14:10:34,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:34,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:10:34,053 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:10:34,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:10:34,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:10:34,151 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:10:34,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:10:34,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-23 14:10:34,505 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:10:34,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [110687461] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:10:34,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673753923] [2022-11-23 14:10:34,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:34,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:34,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:10:34,507 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:10:34,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-23 14:10:34,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:34,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 14:10:34,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:34,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:10:34,690 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:10:34,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:10:34,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:10:34,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:10:34,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:10:35,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-23 14:10:35,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:10:35,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673753923] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:10:35,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:10:35,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 10 [2022-11-23 14:10:35,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170090698] [2022-11-23 14:10:35,176 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:10:35,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 14:10:35,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:10:35,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 14:10:35,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:10:35,178 INFO L87 Difference]: Start difference. First operand 336 states and 384 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-23 14:10:38,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:10:38,108 INFO L93 Difference]: Finished difference Result 363 states and 407 transitions. [2022-11-23 14:10:38,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:10:38,111 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2022-11-23 14:10:38,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:10:38,112 INFO L225 Difference]: With dead ends: 363 [2022-11-23 14:10:38,112 INFO L226 Difference]: Without dead ends: 363 [2022-11-23 14:10:38,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 151 SyntacticMatches, 14 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:10:38,113 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 499 mSDsluCounter, 1037 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 1071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:10:38,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [507 Valid, 1257 Invalid, 1071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-23 14:10:38,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-11-23 14:10:38,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 339. [2022-11-23 14:10:38,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 203 states have (on average 1.6945812807881773) internal successors, (344), 313 states have internal predecessors, (344), 17 states have call successors, (17), 8 states have call predecessors, (17), 10 states have return successors, (26), 19 states have call predecessors, (26), 17 states have call successors, (26) [2022-11-23 14:10:38,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 387 transitions. [2022-11-23 14:10:38,121 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 387 transitions. Word has length 30 [2022-11-23 14:10:38,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:38,121 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 387 transitions. [2022-11-23 14:10:38,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-23 14:10:38,122 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 387 transitions. [2022-11-23 14:10:38,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-23 14:10:38,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:38,122 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:10:38,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-23 14:10:38,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2022-11-23 14:10:38,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-23 14:10:38,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:38,734 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:10:38,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:38,734 INFO L85 PathProgramCache]: Analyzing trace with hash -154246822, now seen corresponding path program 1 times [2022-11-23 14:10:38,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:10:38,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [954005061] [2022-11-23 14:10:38,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:38,735 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:10:38,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:10:38,736 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:10:38,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-23 14:10:38,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:38,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 14:10:38,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:38,974 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:10:38,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 14:10:39,133 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:10:39,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 14:10:39,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:10:39,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:10:39,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:10:39,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:10:39,631 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:10:39,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [954005061] [2022-11-23 14:10:39,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [954005061] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:10:39,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [607177562] [2022-11-23 14:10:39,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:39,632 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:10:39,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:10:39,633 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:10:39,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-11-23 14:10:39,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:39,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 14:10:39,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:39,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-23 14:10:39,959 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:10:39,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 14:10:40,149 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:10:40,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 14:10:40,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2022-11-23 14:10:40,804 INFO L321 Elim1Store]: treesize reduction 32, result has 27.3 percent of original size [2022-11-23 14:10:40,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 39 [2022-11-23 14:10:40,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:10:40,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:10:41,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [607177562] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:10:41,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453548230] [2022-11-23 14:10:41,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:41,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:41,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:10:41,211 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:10:41,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-23 14:10:41,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:41,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 14:10:41,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:41,443 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:10:41,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 14:10:41,560 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:10:41,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 14:10:41,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:10:41,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:10:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:10:41,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:10:41,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453548230] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:10:41,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:10:41,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 7] total 13 [2022-11-23 14:10:41,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534641270] [2022-11-23 14:10:41,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:10:41,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 14:10:41,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:10:41,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 14:10:41,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2022-11-23 14:10:41,942 INFO L87 Difference]: Start difference. First operand 339 states and 387 transitions. Second operand has 15 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-23 14:10:46,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:10:48,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:10:50,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:10:52,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:10:54,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:10:56,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:10:58,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:11:00,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:11:03,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:11:05,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:11:07,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:11:09,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:11:11,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:11:13,893 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:11:15,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:11:17,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:11:19,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:11:22,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:11:24,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:11:26,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:11:28,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:11:30,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:11:32,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:11:34,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:11:36,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:11:38,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:11:40,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:11:42,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:11:44,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:11:46,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:11:48,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:11:50,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:11:53,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:11:55,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:11:57,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:11:59,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:11:59,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:59,588 INFO L93 Difference]: Finished difference Result 418 states and 466 transitions. [2022-11-23 14:11:59,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 14:11:59,590 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 32 [2022-11-23 14:11:59,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:59,592 INFO L225 Difference]: With dead ends: 418 [2022-11-23 14:11:59,592 INFO L226 Difference]: Without dead ends: 418 [2022-11-23 14:11:59,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 100 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=162, Invalid=487, Unknown=1, NotChecked=0, Total=650 [2022-11-23 14:11:59,592 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 654 mSDsluCounter, 1141 mSDsCounter, 0 mSdLazyCounter, 1124 mSolverCounterSat, 134 mSolverCounterUnsat, 35 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 1293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1124 IncrementalHoareTripleChecker+Invalid, 35 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 75.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:59,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [659 Valid, 1344 Invalid, 1293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1124 Invalid, 35 Unknown, 0 Unchecked, 75.4s Time] [2022-11-23 14:11:59,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-11-23 14:11:59,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 341. [2022-11-23 14:11:59,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 205 states have (on average 1.6878048780487804) internal successors, (346), 315 states have internal predecessors, (346), 17 states have call successors, (17), 8 states have call predecessors, (17), 10 states have return successors, (26), 19 states have call predecessors, (26), 17 states have call successors, (26) [2022-11-23 14:11:59,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 389 transitions. [2022-11-23 14:11:59,609 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 389 transitions. Word has length 32 [2022-11-23 14:11:59,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:11:59,610 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 389 transitions. [2022-11-23 14:11:59,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-23 14:11:59,610 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 389 transitions. [2022-11-23 14:11:59,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-23 14:11:59,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:59,611 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:11:59,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Ended with exit code 0 [2022-11-23 14:11:59,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2022-11-23 14:12:00,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-11-23 14:12:00,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:12:00,223 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr80ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:12:00,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:00,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1682263433, now seen corresponding path program 1 times [2022-11-23 14:12:00,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:12:00,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [954681833] [2022-11-23 14:12:00,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:00,223 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:12:00,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:12:00,225 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:12:00,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-23 14:12:00,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:00,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:12:00,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:00,397 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:12:00,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:12:00,446 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:12:00,446 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:12:00,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [954681833] [2022-11-23 14:12:00,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [954681833] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:12:00,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1204691953] [2022-11-23 14:12:00,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:00,447 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:12:00,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:12:00,448 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:12:00,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-11-23 14:12:00,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:00,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:12:00,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:00,667 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:12:00,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:12:00,724 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:12:00,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1204691953] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:12:00,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963176329] [2022-11-23 14:12:00,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:00,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:12:00,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:12:00,726 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:12:00,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-23 14:12:00,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:00,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:12:00,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:00,899 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:12:00,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:12:00,947 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:12:00,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963176329] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:12:00,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:12:00,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 4 [2022-11-23 14:12:00,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650442420] [2022-11-23 14:12:00,947 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:12:00,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:12:00,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:12:00,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:12:00,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:12:00,949 INFO L87 Difference]: Start difference. First operand 341 states and 389 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 14:12:01,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:01,010 INFO L93 Difference]: Finished difference Result 340 states and 388 transitions. [2022-11-23 14:12:01,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:12:01,011 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2022-11-23 14:12:01,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:01,012 INFO L225 Difference]: With dead ends: 340 [2022-11-23 14:12:01,012 INFO L226 Difference]: Without dead ends: 340 [2022-11-23 14:12:01,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:12:01,013 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 237 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:01,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 1041 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:12:01,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-11-23 14:12:01,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2022-11-23 14:12:01,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 205 states have (on average 1.6829268292682926) internal successors, (345), 314 states have internal predecessors, (345), 17 states have call successors, (17), 8 states have call predecessors, (17), 10 states have return successors, (26), 19 states have call predecessors, (26), 17 states have call successors, (26) [2022-11-23 14:12:01,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 388 transitions. [2022-11-23 14:12:01,021 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 388 transitions. Word has length 33 [2022-11-23 14:12:01,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:01,021 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 388 transitions. [2022-11-23 14:12:01,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 14:12:01,022 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 388 transitions. [2022-11-23 14:12:01,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-23 14:12:01,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:01,022 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:12:01,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2022-11-23 14:12:01,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Ended with exit code 0 [2022-11-23 14:12:01,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-11-23 14:12:01,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:12:01,626 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:12:01,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:01,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1653634066, now seen corresponding path program 1 times [2022-11-23 14:12:01,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:12:01,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1512561674] [2022-11-23 14:12:01,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:01,627 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:12:01,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:12:01,628 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:12:01,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-23 14:12:01,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:01,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-23 14:12:01,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:01,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:12:01,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:12:01,978 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_490 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_490) |c_#length|)))) is different from true [2022-11-23 14:12:01,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:02,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 14:12:02,036 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:12:02,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:12:02,137 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_492 (_ BitVec 1))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_492) |c_#valid|)) (exists ((v_ArrVal_491 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_491))))) is different from true [2022-11-23 14:12:02,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:02,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 14:12:02,202 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:02,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 14:12:02,272 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_493 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_493))))) is different from true [2022-11-23 14:12:02,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:02,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 14:12:02,311 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:12:02,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:12:02,333 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 12 not checked. [2022-11-23 14:12:02,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:12:02,707 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:12:02,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1512561674] [2022-11-23 14:12:02,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1512561674] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:12:02,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [91436776] [2022-11-23 14:12:02,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:02,708 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:12:02,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:12:02,709 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:12:02,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-11-23 14:12:02,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:02,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-23 14:12:02,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:02,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:12:03,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:12:03,164 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:12:03,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:12:03,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 14:12:03,288 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_521 (_ BitVec 1))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_521) |c_#valid|)) (exists ((v_ArrVal_520 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_520) |c_#length|)))) is different from true [2022-11-23 14:12:03,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:03,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 14:12:03,350 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:03,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 14:12:03,441 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_522 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_522) |c_#length|)))) is different from true [2022-11-23 14:12:03,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:03,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 14:12:03,481 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:12:03,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:12:03,502 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 10 not checked. [2022-11-23 14:12:03,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:12:03,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [91436776] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:12:03,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912158299] [2022-11-23 14:12:03,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:03,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:12:03,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:12:03,759 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:12:03,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-11-23 14:12:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:03,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-23 14:12:03,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:03,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:12:03,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:12:04,034 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_548 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_548) |c_#length|)))) is different from true [2022-11-23 14:12:04,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:04,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 14:12:04,077 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:12:04,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:12:04,135 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_550 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_550))) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_549 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_549) |c_#length|)))) is different from true [2022-11-23 14:12:04,212 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:04,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 14:12:04,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 14:12:04,313 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_551 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_551))))) is different from true [2022-11-23 14:12:04,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:04,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 14:12:04,378 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:12:04,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:12:04,401 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 12 not checked. [2022-11-23 14:12:04,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:12:04,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912158299] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:12:04,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:12:04,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 17 [2022-11-23 14:12:04,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313707039] [2022-11-23 14:12:04,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:12:04,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 14:12:04,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:12:04,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 14:12:04,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=8, NotChecked=216, Total=380 [2022-11-23 14:12:04,685 INFO L87 Difference]: Start difference. First operand 340 states and 388 transitions. Second operand has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 10 states have return successors, (10), 4 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-23 14:12:09,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:09,436 INFO L93 Difference]: Finished difference Result 361 states and 405 transitions. [2022-11-23 14:12:09,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:12:09,437 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 10 states have return successors, (10), 4 states have call predecessors, (10), 2 states have call successors, (10) Word has length 33 [2022-11-23 14:12:09,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:09,438 INFO L225 Difference]: With dead ends: 361 [2022-11-23 14:12:09,438 INFO L226 Difference]: Without dead ends: 361 [2022-11-23 14:12:09,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=59, Invalid=175, Unknown=8, NotChecked=264, Total=506 [2022-11-23 14:12:09,439 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 320 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 33 mSolverCounterUnsat, 46 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 1021 SdHoareTripleChecker+Invalid, 4550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 46 IncrementalHoareTripleChecker+Unknown, 2968 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:09,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 1021 Invalid, 4550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1503 Invalid, 46 Unknown, 2968 Unchecked, 4.3s Time] [2022-11-23 14:12:09,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-11-23 14:12:09,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 331. [2022-11-23 14:12:09,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 199 states have (on average 1.6834170854271358) internal successors, (335), 307 states have internal predecessors, (335), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (24), 17 states have call predecessors, (24), 16 states have call successors, (24) [2022-11-23 14:12:09,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 375 transitions. [2022-11-23 14:12:09,446 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 375 transitions. Word has length 33 [2022-11-23 14:12:09,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:09,446 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 375 transitions. [2022-11-23 14:12:09,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 2 states have call successors, (4), 2 states have call predecessors, (4), 10 states have return successors, (10), 4 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-23 14:12:09,447 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 375 transitions. [2022-11-23 14:12:09,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-23 14:12:09,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:09,447 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:12:09,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-23 14:12:09,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (58)] Ended with exit code 0 [2022-11-23 14:12:09,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-11-23 14:12:10,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:12:10,059 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr81ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:12:10,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:10,060 INFO L85 PathProgramCache]: Analyzing trace with hash 610559287, now seen corresponding path program 1 times [2022-11-23 14:12:10,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:12:10,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1414909420] [2022-11-23 14:12:10,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:10,060 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:12:10,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:12:10,061 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:12:10,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-23 14:12:10,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:10,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:12:10,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:10,648 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:12:10,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:12:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:12:10,822 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:12:10,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1414909420] [2022-11-23 14:12:10,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1414909420] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:12:10,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1397563778] [2022-11-23 14:12:10,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:10,823 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:12:10,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:12:10,824 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:12:10,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2022-11-23 14:12:11,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:11,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:12:11,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:11,085 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:12:11,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:12:11,150 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:12:11,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1397563778] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:12:11,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117459874] [2022-11-23 14:12:11,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:11,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:12:11,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:12:11,151 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:12:11,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-11-23 14:12:11,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:11,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:12:11,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:11,359 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:12:11,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:12:11,426 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:12:11,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117459874] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:12:11,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:12:11,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 5, 4] total 9 [2022-11-23 14:12:11,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852200121] [2022-11-23 14:12:11,427 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:12:11,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 14:12:11,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:12:11,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 14:12:11,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:12:11,428 INFO L87 Difference]: Start difference. First operand 331 states and 375 transitions. Second operand has 10 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-23 14:12:12,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:12,560 INFO L93 Difference]: Finished difference Result 332 states and 376 transitions. [2022-11-23 14:12:12,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:12:12,561 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 34 [2022-11-23 14:12:12,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:12,563 INFO L225 Difference]: With dead ends: 332 [2022-11-23 14:12:12,563 INFO L226 Difference]: Without dead ends: 332 [2022-11-23 14:12:12,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 187 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:12:12,564 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 580 mSDsluCounter, 1139 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 1431 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:12,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [593 Valid, 1431 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-23 14:12:12,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-11-23 14:12:12,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 330. [2022-11-23 14:12:12,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 199 states have (on average 1.678391959798995) internal successors, (334), 306 states have internal predecessors, (334), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (24), 17 states have call predecessors, (24), 16 states have call successors, (24) [2022-11-23 14:12:12,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 374 transitions. [2022-11-23 14:12:12,571 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 374 transitions. Word has length 34 [2022-11-23 14:12:12,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:12,571 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 374 transitions. [2022-11-23 14:12:12,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-23 14:12:12,571 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 374 transitions. [2022-11-23 14:12:12,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-23 14:12:12,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:12,572 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-23 14:12:12,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-11-23 14:12:12,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (61)] Forceful destruction successful, exit code 0 [2022-11-23 14:12:12,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Ended with exit code 0 [2022-11-23 14:12:13,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:12:13,175 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr91REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:12:13,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:13,176 INFO L85 PathProgramCache]: Analyzing trace with hash 2092671515, now seen corresponding path program 1 times [2022-11-23 14:12:13,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:12:13,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1000129627] [2022-11-23 14:12:13,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:13,176 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:12:13,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:12:13,177 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:12:13,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-23 14:12:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:13,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 14:12:13,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:13,572 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:12:13,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:12:13,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 14:12:13,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:12:13,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:12:14,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:12:14,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:12:14,184 INFO L321 Elim1Store]: treesize reduction 7, result has 50.0 percent of original size [2022-11-23 14:12:14,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2022-11-23 14:12:14,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:12:14,552 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:12:14,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1000129627] [2022-11-23 14:12:14,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1000129627] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 14:12:14,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:12:14,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2022-11-23 14:12:14,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883108759] [2022-11-23 14:12:14,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:12:14,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:12:14,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:12:14,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:12:14,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-23 14:12:14,554 INFO L87 Difference]: Start difference. First operand 330 states and 374 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 14:12:16,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:16,790 INFO L93 Difference]: Finished difference Result 370 states and 416 transitions. [2022-11-23 14:12:16,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:12:16,791 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2022-11-23 14:12:16,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:16,793 INFO L225 Difference]: With dead ends: 370 [2022-11-23 14:12:16,793 INFO L226 Difference]: Without dead ends: 370 [2022-11-23 14:12:16,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-11-23 14:12:16,794 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 94 mSDsluCounter, 1398 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 1708 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:16,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 1708 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-23 14:12:16,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-11-23 14:12:16,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 332. [2022-11-23 14:12:16,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 201 states have (on average 1.6766169154228856) internal successors, (337), 308 states have internal predecessors, (337), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (24), 17 states have call predecessors, (24), 16 states have call successors, (24) [2022-11-23 14:12:16,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 377 transitions. [2022-11-23 14:12:16,802 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 377 transitions. Word has length 34 [2022-11-23 14:12:16,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:16,802 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 377 transitions. [2022-11-23 14:12:16,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 14:12:16,802 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 377 transitions. [2022-11-23 14:12:16,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-23 14:12:16,803 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:16,803 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-23 14:12:16,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2022-11-23 14:12:17,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:12:17,015 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr92REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:12:17,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:17,016 INFO L85 PathProgramCache]: Analyzing trace with hash 2092671516, now seen corresponding path program 1 times [2022-11-23 14:12:17,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:12:17,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [897661757] [2022-11-23 14:12:17,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:17,017 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:12:17,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:12:17,019 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:12:17,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-23 14:12:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:17,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 14:12:17,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:17,589 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:12:17,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:12:17,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 14:12:17,638 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:12:17,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:12:17,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 14:12:18,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:12:18,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:12:18,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:12:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:12:18,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:12:18,495 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:12:18,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 42 [2022-11-23 14:12:18,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2022-11-23 14:12:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:12:19,646 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:12:19,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [897661757] [2022-11-23 14:12:19,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [897661757] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 14:12:19,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:12:19,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2022-11-23 14:12:19,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293889675] [2022-11-23 14:12:19,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:12:19,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:12:19,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:12:19,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:12:19,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-23 14:12:19,648 INFO L87 Difference]: Start difference. First operand 332 states and 377 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 14:12:23,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:23,602 INFO L93 Difference]: Finished difference Result 370 states and 416 transitions. [2022-11-23 14:12:23,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:12:23,604 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2022-11-23 14:12:23,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:23,604 INFO L225 Difference]: With dead ends: 370 [2022-11-23 14:12:23,604 INFO L226 Difference]: Without dead ends: 370 [2022-11-23 14:12:23,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-11-23 14:12:23,605 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 72 mSDsluCounter, 1465 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1777 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:23,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 1777 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-23 14:12:23,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-11-23 14:12:23,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 332. [2022-11-23 14:12:23,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 201 states have (on average 1.671641791044776) internal successors, (336), 308 states have internal predecessors, (336), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (24), 17 states have call predecessors, (24), 16 states have call successors, (24) [2022-11-23 14:12:23,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 376 transitions. [2022-11-23 14:12:23,612 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 376 transitions. Word has length 34 [2022-11-23 14:12:23,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:23,612 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 376 transitions. [2022-11-23 14:12:23,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 14:12:23,613 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 376 transitions. [2022-11-23 14:12:23,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-23 14:12:23,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:23,613 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:12:23,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2022-11-23 14:12:23,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:12:23,826 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr82ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:12:23,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:23,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1747469131, now seen corresponding path program 1 times [2022-11-23 14:12:23,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:12:23,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1332557153] [2022-11-23 14:12:23,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:23,827 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:12:23,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:12:23,828 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:12:23,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-23 14:12:23,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:23,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:12:23,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:23,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:12:24,087 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:12:24,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:12:24,229 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:12:24,229 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:12:24,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1332557153] [2022-11-23 14:12:24,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1332557153] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:12:24,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [520367695] [2022-11-23 14:12:24,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:24,230 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:12:24,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:12:24,231 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:12:24,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2022-11-23 14:12:24,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:24,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:12:24,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:24,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:12:24,556 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:12:24,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:12:24,688 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:12:24,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [520367695] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:12:24,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142516298] [2022-11-23 14:12:24,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:24,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:12:24,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:12:24,690 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:12:24,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-11-23 14:12:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:24,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:12:24,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:24,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:12:24,889 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:12:24,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:12:25,023 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:12:25,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142516298] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:12:25,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:12:25,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 6 [2022-11-23 14:12:25,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719045665] [2022-11-23 14:12:25,023 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:12:25,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:12:25,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:12:25,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:12:25,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:12:25,025 INFO L87 Difference]: Start difference. First operand 332 states and 376 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:12:27,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:27,146 INFO L93 Difference]: Finished difference Result 356 states and 396 transitions. [2022-11-23 14:12:27,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:12:27,146 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2022-11-23 14:12:27,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:27,147 INFO L225 Difference]: With dead ends: 356 [2022-11-23 14:12:27,147 INFO L226 Difference]: Without dead ends: 356 [2022-11-23 14:12:27,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 197 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:12:27,148 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 207 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:27,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 841 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-23 14:12:27,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-11-23 14:12:27,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 335. [2022-11-23 14:12:27,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 204 states have (on average 1.661764705882353) internal successors, (339), 311 states have internal predecessors, (339), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (24), 17 states have call predecessors, (24), 16 states have call successors, (24) [2022-11-23 14:12:27,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 379 transitions. [2022-11-23 14:12:27,155 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 379 transitions. Word has length 35 [2022-11-23 14:12:27,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:27,156 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 379 transitions. [2022-11-23 14:12:27,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:12:27,156 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 379 transitions. [2022-11-23 14:12:27,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-23 14:12:27,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:27,156 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-23 14:12:27,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (66)] Ended with exit code 0 [2022-11-23 14:12:27,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-11-23 14:12:27,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2022-11-23 14:12:27,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:12:27,757 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr93REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:12:27,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:27,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1327181508, now seen corresponding path program 1 times [2022-11-23 14:12:27,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:12:27,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [9099074] [2022-11-23 14:12:27,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:27,758 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:12:27,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:12:27,759 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:12:27,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-23 14:12:27,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:27,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:12:27,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:27,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:12:27,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:12:27,921 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:12:27,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [9099074] [2022-11-23 14:12:27,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [9099074] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:12:27,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:12:27,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:12:27,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797276282] [2022-11-23 14:12:27,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:12:27,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:12:27,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:12:27,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:12:27,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:12:27,923 INFO L87 Difference]: Start difference. First operand 335 states and 379 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 14:12:28,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:28,559 INFO L93 Difference]: Finished difference Result 353 states and 399 transitions. [2022-11-23 14:12:28,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:12:28,560 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-11-23 14:12:28,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:28,562 INFO L225 Difference]: With dead ends: 353 [2022-11-23 14:12:28,562 INFO L226 Difference]: Without dead ends: 353 [2022-11-23 14:12:28,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:12:28,563 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 42 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:28,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 725 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 14:12:28,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-11-23 14:12:28,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 336. [2022-11-23 14:12:28,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 206 states have (on average 1.6601941747572815) internal successors, (342), 312 states have internal predecessors, (342), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (24), 17 states have call predecessors, (24), 16 states have call successors, (24) [2022-11-23 14:12:28,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 382 transitions. [2022-11-23 14:12:28,570 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 382 transitions. Word has length 37 [2022-11-23 14:12:28,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:28,571 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 382 transitions. [2022-11-23 14:12:28,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 14:12:28,571 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 382 transitions. [2022-11-23 14:12:28,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-23 14:12:28,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:28,572 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-23 14:12:28,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2022-11-23 14:12:28,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:12:28,784 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr94REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:12:28,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:28,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1327181509, now seen corresponding path program 1 times [2022-11-23 14:12:28,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:12:28,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [517816736] [2022-11-23 14:12:28,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:28,785 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:12:28,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:12:28,786 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:12:28,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-23 14:12:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:28,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 14:12:28,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:29,317 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:12:29,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:12:29,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 14:12:29,366 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:12:29,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:12:29,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 14:12:29,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:12:29,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:12:29,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:12:29,929 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:12:29,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:12:30,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:12:30,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:12:30,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2022-11-23 14:12:30,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:12:30,652 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:12:30,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [517816736] [2022-11-23 14:12:30,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [517816736] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-23 14:12:30,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:12:30,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2022-11-23 14:12:30,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281791389] [2022-11-23 14:12:30,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:12:30,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:12:30,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:12:30,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:12:30,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-11-23 14:12:30,654 INFO L87 Difference]: Start difference. First operand 336 states and 382 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 14:12:32,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:32,185 INFO L93 Difference]: Finished difference Result 342 states and 387 transitions. [2022-11-23 14:12:32,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:12:32,186 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2022-11-23 14:12:32,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:32,187 INFO L225 Difference]: With dead ends: 342 [2022-11-23 14:12:32,187 INFO L226 Difference]: Without dead ends: 342 [2022-11-23 14:12:32,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2022-11-23 14:12:32,188 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 57 mSDsluCounter, 1330 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 1649 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:32,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 1649 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-23 14:12:32,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-11-23 14:12:32,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 338. [2022-11-23 14:12:32,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 208 states have (on average 1.6538461538461537) internal successors, (344), 314 states have internal predecessors, (344), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (24), 17 states have call predecessors, (24), 16 states have call successors, (24) [2022-11-23 14:12:32,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 384 transitions. [2022-11-23 14:12:32,193 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 384 transitions. Word has length 37 [2022-11-23 14:12:32,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:32,193 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 384 transitions. [2022-11-23 14:12:32,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-23 14:12:32,193 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 384 transitions. [2022-11-23 14:12:32,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-23 14:12:32,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:32,194 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:12:32,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-23 14:12:32,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:12:32,395 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr85ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:12:32,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:32,395 INFO L85 PathProgramCache]: Analyzing trace with hash -445295076, now seen corresponding path program 1 times [2022-11-23 14:12:32,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:12:32,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [941100719] [2022-11-23 14:12:32,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:32,396 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:12:32,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:12:32,396 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:12:32,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-23 14:12:32,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:32,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 14:12:32,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:32,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:12:32,646 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:12:32,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:12:32,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:12:32,795 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:12:32,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:12:33,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-23 14:12:33,188 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:12:33,188 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:12:33,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [941100719] [2022-11-23 14:12:33,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [941100719] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:12:33,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1232229326] [2022-11-23 14:12:33,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:33,189 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:12:33,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:12:33,191 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:12:33,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2022-11-23 14:12:33,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:33,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 14:12:33,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:33,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:12:33,535 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:12:33,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:12:33,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:12:33,618 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:12:33,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:12:33,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-23 14:12:33,944 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:12:33,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1232229326] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:12:33,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440019236] [2022-11-23 14:12:33,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:33,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:12:33,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:12:33,946 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:12:33,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-11-23 14:12:34,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:34,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 14:12:34,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:34,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:12:34,146 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:12:34,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:12:34,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:12:34,234 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:12:34,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:12:34,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-23 14:12:34,553 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:12:34,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440019236] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:12:34,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:12:34,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 10 [2022-11-23 14:12:34,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619497849] [2022-11-23 14:12:34,554 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:12:34,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 14:12:34,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:12:34,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 14:12:34,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:12:34,555 INFO L87 Difference]: Start difference. First operand 338 states and 384 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-23 14:12:37,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:37,457 INFO L93 Difference]: Finished difference Result 375 states and 416 transitions. [2022-11-23 14:12:37,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:12:37,458 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2022-11-23 14:12:37,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:37,461 INFO L225 Difference]: With dead ends: 375 [2022-11-23 14:12:37,461 INFO L226 Difference]: Without dead ends: 375 [2022-11-23 14:12:37,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 199 SyntacticMatches, 14 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:12:37,461 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 604 mSDsluCounter, 1120 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:37,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [612 Valid, 1355 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-23 14:12:37,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-11-23 14:12:37,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 341. [2022-11-23 14:12:37,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 211 states have (on average 1.6445497630331753) internal successors, (347), 317 states have internal predecessors, (347), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (24), 17 states have call predecessors, (24), 16 states have call successors, (24) [2022-11-23 14:12:37,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 387 transitions. [2022-11-23 14:12:37,467 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 387 transitions. Word has length 38 [2022-11-23 14:12:37,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:37,467 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 387 transitions. [2022-11-23 14:12:37,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-23 14:12:37,468 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 387 transitions. [2022-11-23 14:12:37,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-23 14:12:37,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:37,468 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-11-23 14:12:37,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Ended with exit code 0 [2022-11-23 14:12:37,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (71)] Ended with exit code 0 [2022-11-23 14:12:37,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-11-23 14:12:38,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:12:38,069 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:12:38,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:38,069 INFO L85 PathProgramCache]: Analyzing trace with hash -183877918, now seen corresponding path program 1 times [2022-11-23 14:12:38,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:12:38,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [85825975] [2022-11-23 14:12:38,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:38,070 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:12:38,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:12:38,071 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:12:38,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-23 14:12:38,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:38,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 14:12:38,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:40,865 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_entry_point_~client~0#1.base| (_ BitVec 32))) (and (exists ((|ULTIMATE.start_entry_point_~cfg~2#1.base| (_ BitVec 32)) (v_ArrVal_803 (_ BitVec 1))) (let ((.cse1 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base| v_ArrVal_803))) (let ((.cse0 (store .cse1 |ULTIMATE.start_entry_point_~cfg~2#1.base| (_ bv0 1)))) (and (= (bvadd (_ bv1 1) (select .cse0 |ULTIMATE.start_entry_point_~client~0#1.base|)) (_ bv0 1)) (= |c_#valid| (store .cse0 |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 1))) (= (_ bv0 1) (select .cse1 |ULTIMATE.start_entry_point_~cfg~2#1.base|)))))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base|)) (not (= |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 32))))) is different from true [2022-11-23 14:12:41,093 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 14:12:41,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:12:41,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-23 14:12:45,974 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:12:45,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [85825975] [2022-11-23 14:12:45,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [85825975] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:12:45,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1057367758] [2022-11-23 14:12:45,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:45,975 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:12:45,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:12:45,976 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:12:45,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (74)] Waiting until timeout for monitored process [2022-11-23 14:12:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:46,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 14:12:46,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:49,462 WARN L859 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32))) (exists ((|ULTIMATE.start_entry_point_~cfg~2#1.base| (_ BitVec 32)) (|ULTIMATE.start_entry_point_~client~0#1.base| (_ BitVec 32)) (v_ArrVal_826 (_ BitVec 1))) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base| v_ArrVal_826))) (let ((.cse1 (store .cse0 |ULTIMATE.start_entry_point_~cfg~2#1.base| (_ bv0 1)))) (and (= (_ bv0 1) (select .cse0 |ULTIMATE.start_entry_point_~cfg~2#1.base|)) (= (store .cse1 |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 1)) |c_#valid|) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base|)) (= (bvadd (select .cse1 |ULTIMATE.start_entry_point_~client~0#1.base|) (_ bv1 1)) (_ bv0 1)) (not (= |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 32)))))))) is different from true [2022-11-23 14:12:49,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:12:49,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:12:52,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-23 14:12:56,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1057367758] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:12:56,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914693827] [2022-11-23 14:12:56,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:56,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:12:56,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:12:56,658 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:12:56,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-11-23 14:12:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:56,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 14:12:56,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:05,635 WARN L859 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_entry_point_~client~0#1.base| (_ BitVec 32))) (and (exists ((|ULTIMATE.start_entry_point_~cfg~2#1.base| (_ BitVec 32)) (v_ArrVal_804 (_ BitVec 1))) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base| v_ArrVal_804))) (and (= (store (store .cse0 |ULTIMATE.start_entry_point_~cfg~2#1.base| (_ bv0 1)) |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 1)) |c_#valid|) (= (_ bv0 1) (select .cse0 |ULTIMATE.start_entry_point_~cfg~2#1.base|))))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base|)))) is different from true [2022-11-23 14:13:05,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:13:05,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:13:08,244 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret66#1.base_125| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret66#1.base_125|))) (= |c_ULTIMATE.start_main_old_#valid#1| (store (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret66#1.base_125| (_ bv0 1)) |c_ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 1))))) is different from false [2022-11-23 14:13:08,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914693827] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:13:08,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:13:08,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 27 [2022-11-23 14:13:08,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201181603] [2022-11-23 14:13:08,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:13:08,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-23 14:13:08,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:13:08,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-23 14:13:08,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1147, Unknown=16, NotChecked=292, Total=1640 [2022-11-23 14:13:08,248 INFO L87 Difference]: Start difference. First operand 341 states and 387 transitions. Second operand has 28 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 22 states have internal predecessors, (77), 8 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-23 14:13:19,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:13:19,021 INFO L93 Difference]: Finished difference Result 356 states and 401 transitions. [2022-11-23 14:13:19,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 14:13:19,023 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 22 states have internal predecessors, (77), 8 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 39 [2022-11-23 14:13:19,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:13:19,024 INFO L225 Difference]: With dead ends: 356 [2022-11-23 14:13:19,024 INFO L226 Difference]: Without dead ends: 339 [2022-11-23 14:13:19,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 147 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 4 IntricatePredicates, 3 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 29.8s TimeCoverageRelationStatistics Valid=277, Invalid=1703, Unknown=16, NotChecked=356, Total=2352 [2022-11-23 14:13:19,025 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 404 mSDsluCounter, 2259 mSDsCounter, 0 mSdLazyCounter, 2481 mSolverCounterSat, 59 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 2438 SdHoareTripleChecker+Invalid, 3577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2481 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 1032 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:13:19,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 2438 Invalid, 3577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2481 Invalid, 5 Unknown, 1032 Unchecked, 7.8s Time] [2022-11-23 14:13:19,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-11-23 14:13:19,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2022-11-23 14:13:19,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 209 states have (on average 1.6507177033492824) internal successors, (345), 316 states have internal predecessors, (345), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 16 states have call predecessors, (23), 16 states have call successors, (23) [2022-11-23 14:13:19,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 384 transitions. [2022-11-23 14:13:19,032 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 384 transitions. Word has length 39 [2022-11-23 14:13:19,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:13:19,033 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 384 transitions. [2022-11-23 14:13:19,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 3.2083333333333335) internal successors, (77), 22 states have internal predecessors, (77), 8 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-23 14:13:19,033 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 384 transitions. [2022-11-23 14:13:19,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-23 14:13:19,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:13:19,034 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:13:19,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (74)] Forceful destruction successful, exit code 0 [2022-11-23 14:13:19,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-11-23 14:13:19,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Ended with exit code 0 [2022-11-23 14:13:19,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:13:19,638 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:13:19,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:13:19,639 INFO L85 PathProgramCache]: Analyzing trace with hash 224946307, now seen corresponding path program 1 times [2022-11-23 14:13:19,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:13:19,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [225600139] [2022-11-23 14:13:19,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:19,639 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:13:19,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:13:19,640 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:13:19,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-23 14:13:19,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:19,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:13:19,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:19,822 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:13:19,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:13:19,822 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:13:19,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [225600139] [2022-11-23 14:13:19,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [225600139] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:13:19,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:13:19,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:13:19,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595561771] [2022-11-23 14:13:19,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:13:19,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:13:19,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:13:19,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:13:19,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:13:19,824 INFO L87 Difference]: Start difference. First operand 339 states and 384 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 14:13:19,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:13:19,900 INFO L93 Difference]: Finished difference Result 327 states and 371 transitions. [2022-11-23 14:13:19,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:13:19,901 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2022-11-23 14:13:19,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:13:19,903 INFO L225 Difference]: With dead ends: 327 [2022-11-23 14:13:19,903 INFO L226 Difference]: Without dead ends: 327 [2022-11-23 14:13:19,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:13:19,903 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 236 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 1039 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:13:19,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 1039 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:13:19,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-11-23 14:13:19,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2022-11-23 14:13:19,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 197 states have (on average 1.6852791878172588) internal successors, (332), 304 states have internal predecessors, (332), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 16 states have call predecessors, (23), 16 states have call successors, (23) [2022-11-23 14:13:19,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 371 transitions. [2022-11-23 14:13:19,909 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 371 transitions. Word has length 39 [2022-11-23 14:13:19,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:13:19,909 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 371 transitions. [2022-11-23 14:13:19,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 14:13:19,910 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 371 transitions. [2022-11-23 14:13:19,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-23 14:13:19,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:13:19,910 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 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] [2022-11-23 14:13:19,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2022-11-23 14:13:20,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:13:20,122 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr77ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:13:20,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:13:20,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1294605214, now seen corresponding path program 1 times [2022-11-23 14:13:20,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:13:20,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [54531993] [2022-11-23 14:13:20,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:20,122 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:13:20,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:13:20,123 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:13:20,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-23 14:13:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:20,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:13:20,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:20,338 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:13:20,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:13:20,338 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:13:20,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [54531993] [2022-11-23 14:13:20,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [54531993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:13:20,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:13:20,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:13:20,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100356030] [2022-11-23 14:13:20,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:13:20,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:13:20,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:13:20,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:13:20,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:13:20,340 INFO L87 Difference]: Start difference. First operand 327 states and 371 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:13:20,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:13:20,415 INFO L93 Difference]: Finished difference Result 368 states and 416 transitions. [2022-11-23 14:13:20,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:13:20,416 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-11-23 14:13:20,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:13:20,417 INFO L225 Difference]: With dead ends: 368 [2022-11-23 14:13:20,417 INFO L226 Difference]: Without dead ends: 368 [2022-11-23 14:13:20,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:13:20,418 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 43 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:13:20,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 1285 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:13:20,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-11-23 14:13:20,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 329. [2022-11-23 14:13:20,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 199 states have (on average 1.678391959798995) internal successors, (334), 305 states have internal predecessors, (334), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 17 states have call predecessors, (23), 16 states have call successors, (23) [2022-11-23 14:13:20,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 373 transitions. [2022-11-23 14:13:20,425 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 373 transitions. Word has length 41 [2022-11-23 14:13:20,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:13:20,426 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 373 transitions. [2022-11-23 14:13:20,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:13:20,426 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 373 transitions. [2022-11-23 14:13:20,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-23 14:13:20,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:13:20,427 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:13:20,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2022-11-23 14:13:20,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:13:20,638 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr77ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:13:20,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:13:20,638 INFO L85 PathProgramCache]: Analyzing trace with hash -789046589, now seen corresponding path program 2 times [2022-11-23 14:13:20,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:13:20,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [202180007] [2022-11-23 14:13:20,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:13:20,639 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:13:20,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:13:20,641 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:13:20,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-23 14:13:20,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:13:20,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:13:20,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:13:20,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:20,898 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:13:20,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:13:20,955 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:13:20,955 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:13:20,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [202180007] [2022-11-23 14:13:20,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [202180007] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:13:20,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [825477608] [2022-11-23 14:13:20,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:13:20,956 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:13:20,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:13:20,957 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:13:20,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (79)] Waiting until timeout for monitored process [2022-11-23 14:13:21,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:13:21,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:13:21,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:13:21,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:21,265 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:13:21,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:13:21,330 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:13:21,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [825477608] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:13:21,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683546687] [2022-11-23 14:13:21,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:13:21,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:13:21,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:13:21,332 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:13:21,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-11-23 14:13:21,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:13:21,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:13:21,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:13:21,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:21,529 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:13:21,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:13:21,580 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:13:21,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683546687] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:13:21,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:13:21,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 4 [2022-11-23 14:13:21,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884872185] [2022-11-23 14:13:21,581 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:13:21,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:13:21,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:13:21,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:13:21,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:13:21,582 INFO L87 Difference]: Start difference. First operand 329 states and 373 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:13:21,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:13:21,649 INFO L93 Difference]: Finished difference Result 328 states and 372 transitions. [2022-11-23 14:13:21,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:13:21,650 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-11-23 14:13:21,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:13:21,652 INFO L225 Difference]: With dead ends: 328 [2022-11-23 14:13:21,652 INFO L226 Difference]: Without dead ends: 328 [2022-11-23 14:13:21,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:13:21,653 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 228 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:13:21,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 1027 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:13:21,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-11-23 14:13:21,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2022-11-23 14:13:21,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 199 states have (on average 1.6733668341708543) internal successors, (333), 304 states have internal predecessors, (333), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 17 states have call predecessors, (23), 16 states have call successors, (23) [2022-11-23 14:13:21,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 372 transitions. [2022-11-23 14:13:21,659 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 372 transitions. Word has length 41 [2022-11-23 14:13:21,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:13:21,660 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 372 transitions. [2022-11-23 14:13:21,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:13:21,660 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 372 transitions. [2022-11-23 14:13:21,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-23 14:13:21,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:13:21,661 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:13:21,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (79)] Forceful destruction successful, exit code 0 [2022-11-23 14:13:21,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Forceful destruction successful, exit code 0 [2022-11-23 14:13:22,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-11-23 14:13:22,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:13:22,263 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr88ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:13:22,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:13:22,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1368793298, now seen corresponding path program 1 times [2022-11-23 14:13:22,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:13:22,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [326243555] [2022-11-23 14:13:22,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:22,264 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:13:22,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:13:22,265 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:13:22,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-23 14:13:22,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:22,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 14:13:22,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:22,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:13:22,558 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:13:22,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 14:13:22,722 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:13:22,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 14:13:22,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:13:22,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:13:22,971 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:13:22,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:13:23,496 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:13:23,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [326243555] [2022-11-23 14:13:23,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [326243555] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:13:23,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [905181852] [2022-11-23 14:13:23,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:23,497 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:13:23,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:13:23,498 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:13:23,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (82)] Waiting until timeout for monitored process [2022-11-23 14:13:23,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:23,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 14:13:23,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:23,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:13:23,861 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:13:23,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:13:24,018 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:13:24,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 14:13:24,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:13:24,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:13:24,180 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 14:13:24,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:13:24,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [905181852] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:13:24,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55225289] [2022-11-23 14:13:24,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:24,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:13:24,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:13:24,656 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:13:24,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-11-23 14:13:24,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:24,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 14:13:24,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:24,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:13:24,902 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:13:24,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:13:25,012 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:13:25,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 14:13:25,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:13:25,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:13:25,189 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 14:13:25,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:13:25,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55225289] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:13:25,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:13:25,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 13 [2022-11-23 14:13:25,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402610275] [2022-11-23 14:13:25,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:13:25,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 14:13:25,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:13:25,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 14:13:25,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-11-23 14:13:25,604 INFO L87 Difference]: Start difference. First operand 328 states and 372 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-23 14:13:28,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:13:28,736 INFO L93 Difference]: Finished difference Result 348 states and 388 transitions. [2022-11-23 14:13:28,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 14:13:28,737 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2022-11-23 14:13:28,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:13:28,739 INFO L225 Difference]: With dead ends: 348 [2022-11-23 14:13:28,739 INFO L226 Difference]: Without dead ends: 348 [2022-11-23 14:13:28,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 153 SyntacticMatches, 13 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-11-23 14:13:28,739 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 445 mSDsluCounter, 1081 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 1294 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:13:28,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 1294 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-23 14:13:28,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-11-23 14:13:28,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 331. [2022-11-23 14:13:28,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 202 states have (on average 1.6633663366336633) internal successors, (336), 307 states have internal predecessors, (336), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 17 states have call predecessors, (23), 16 states have call successors, (23) [2022-11-23 14:13:28,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 375 transitions. [2022-11-23 14:13:28,743 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 375 transitions. Word has length 41 [2022-11-23 14:13:28,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:13:28,743 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 375 transitions. [2022-11-23 14:13:28,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-23 14:13:28,743 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 375 transitions. [2022-11-23 14:13:28,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-23 14:13:28,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:13:28,744 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:13:28,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (82)] Forceful destruction successful, exit code 0 [2022-11-23 14:13:28,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Ended with exit code 0 [2022-11-23 14:13:29,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-11-23 14:13:29,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:13:29,345 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:13:29,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:13:29,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1309353403, now seen corresponding path program 1 times [2022-11-23 14:13:29,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:13:29,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [175435227] [2022-11-23 14:13:29,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:29,345 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:13:29,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:13:29,346 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:13:29,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-23 14:13:29,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:29,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:13:29,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:29,579 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:13:29,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:13:29,579 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:13:29,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [175435227] [2022-11-23 14:13:29,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [175435227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:13:29,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:13:29,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:13:29,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380100549] [2022-11-23 14:13:29,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:13:29,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:13:29,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:13:29,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:13:29,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:13:29,580 INFO L87 Difference]: Start difference. First operand 331 states and 375 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-23 14:13:29,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:13:29,651 INFO L93 Difference]: Finished difference Result 385 states and 433 transitions. [2022-11-23 14:13:29,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:13:29,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 42 [2022-11-23 14:13:29,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:13:29,654 INFO L225 Difference]: With dead ends: 385 [2022-11-23 14:13:29,654 INFO L226 Difference]: Without dead ends: 385 [2022-11-23 14:13:29,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:13:29,654 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 50 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1405 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:13:29,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1405 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:13:29,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-11-23 14:13:29,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 333. [2022-11-23 14:13:29,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 204 states have (on average 1.6568627450980393) internal successors, (338), 308 states have internal predecessors, (338), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 18 states have call predecessors, (23), 16 states have call successors, (23) [2022-11-23 14:13:29,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 377 transitions. [2022-11-23 14:13:29,661 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 377 transitions. Word has length 42 [2022-11-23 14:13:29,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:13:29,661 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 377 transitions. [2022-11-23 14:13:29,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-23 14:13:29,662 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 377 transitions. [2022-11-23 14:13:29,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-23 14:13:29,662 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:13:29,662 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:13:29,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Ended with exit code 0 [2022-11-23 14:13:29,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:13:29,867 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr78ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:13:29,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:13:29,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1309359926, now seen corresponding path program 1 times [2022-11-23 14:13:29,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:13:29,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18242426] [2022-11-23 14:13:29,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:29,868 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:13:29,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:13:29,869 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:13:29,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-23 14:13:30,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:30,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:13:30,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:30,538 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:13:30,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:13:30,710 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:13:30,710 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:13:30,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18242426] [2022-11-23 14:13:30,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18242426] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:13:30,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1157263634] [2022-11-23 14:13:30,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:30,711 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:13:30,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:13:30,713 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:13:30,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (86)] Waiting until timeout for monitored process [2022-11-23 14:13:30,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:30,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:13:30,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:31,047 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:13:31,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:13:31,115 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:13:31,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1157263634] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:13:31,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794639018] [2022-11-23 14:13:31,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:31,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:13:31,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:13:31,121 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:13:31,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-11-23 14:13:31,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:31,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:13:31,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:31,381 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:13:31,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:13:31,457 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:13:31,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794639018] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:13:31,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:13:31,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 5, 4] total 9 [2022-11-23 14:13:31,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938899202] [2022-11-23 14:13:31,458 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:13:31,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 14:13:31,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:13:31,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 14:13:31,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:13:31,459 INFO L87 Difference]: Start difference. First operand 333 states and 377 transitions. Second operand has 10 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-23 14:13:32,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:13:32,247 INFO L93 Difference]: Finished difference Result 334 states and 378 transitions. [2022-11-23 14:13:32,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:13:32,248 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) Word has length 42 [2022-11-23 14:13:32,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:13:32,249 INFO L225 Difference]: With dead ends: 334 [2022-11-23 14:13:32,250 INFO L226 Difference]: Without dead ends: 334 [2022-11-23 14:13:32,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 235 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:13:32,250 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 1028 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1040 SdHoareTripleChecker+Valid, 1154 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:13:32,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1040 Valid, 1154 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 14:13:32,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-11-23 14:13:32,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 332. [2022-11-23 14:13:32,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 204 states have (on average 1.6519607843137254) internal successors, (337), 307 states have internal predecessors, (337), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 18 states have call predecessors, (23), 16 states have call successors, (23) [2022-11-23 14:13:32,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 376 transitions. [2022-11-23 14:13:32,256 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 376 transitions. Word has length 42 [2022-11-23 14:13:32,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:13:32,257 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 376 transitions. [2022-11-23 14:13:32,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-23 14:13:32,257 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 376 transitions. [2022-11-23 14:13:32,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-23 14:13:32,257 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:13:32,258 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:13:32,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Forceful destruction successful, exit code 0 [2022-11-23 14:13:32,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (86)] Ended with exit code 0 [2022-11-23 14:13:32,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-11-23 14:13:32,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:13:32,859 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:13:32,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:13:32,859 INFO L85 PathProgramCache]: Analyzing trace with hash 421849722, now seen corresponding path program 1 times [2022-11-23 14:13:32,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:13:32,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [11542725] [2022-11-23 14:13:32,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:32,860 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:13:32,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:13:32,860 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:13:32,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-23 14:13:33,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:33,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 14:13:33,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:33,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:13:33,127 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:13:33,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:13:33,127 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:13:33,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [11542725] [2022-11-23 14:13:33,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [11542725] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:13:33,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:13:33,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:13:33,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962407413] [2022-11-23 14:13:33,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:13:33,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:13:33,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:13:33,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:13:33,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:13:33,129 INFO L87 Difference]: Start difference. First operand 332 states and 376 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-23 14:13:34,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:13:34,077 INFO L93 Difference]: Finished difference Result 335 states and 379 transitions. [2022-11-23 14:13:34,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:13:34,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 42 [2022-11-23 14:13:34,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:13:34,079 INFO L225 Difference]: With dead ends: 335 [2022-11-23 14:13:34,079 INFO L226 Difference]: Without dead ends: 335 [2022-11-23 14:13:34,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:13:34,079 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 14 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 929 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:13:34,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 929 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 14:13:34,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-11-23 14:13:34,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 331. [2022-11-23 14:13:34,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 204 states have (on average 1.6470588235294117) internal successors, (336), 306 states have internal predecessors, (336), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 18 states have call predecessors, (23), 16 states have call successors, (23) [2022-11-23 14:13:34,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 375 transitions. [2022-11-23 14:13:34,086 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 375 transitions. Word has length 42 [2022-11-23 14:13:34,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:13:34,087 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 375 transitions. [2022-11-23 14:13:34,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-23 14:13:34,087 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 375 transitions. [2022-11-23 14:13:34,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-23 14:13:34,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:13:34,088 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:13:34,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Forceful destruction successful, exit code 0 [2022-11-23 14:13:34,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:13:34,299 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:13:34,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:13:34,299 INFO L85 PathProgramCache]: Analyzing trace with hash 421849723, now seen corresponding path program 1 times [2022-11-23 14:13:34,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:13:34,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1237121650] [2022-11-23 14:13:34,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:34,300 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:13:34,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:13:34,301 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:13:34,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-23 14:13:34,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:34,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 14:13:34,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:34,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:13:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 14:13:34,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:13:34,599 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:13:34,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1237121650] [2022-11-23 14:13:34,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1237121650] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:13:34,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:13:34,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:13:34,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630862902] [2022-11-23 14:13:34,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:13:34,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:13:34,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:13:34,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:13:34,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:13:34,601 INFO L87 Difference]: Start difference. First operand 331 states and 375 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-23 14:13:35,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:13:35,942 INFO L93 Difference]: Finished difference Result 381 states and 429 transitions. [2022-11-23 14:13:35,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:13:35,943 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 42 [2022-11-23 14:13:35,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:13:35,944 INFO L225 Difference]: With dead ends: 381 [2022-11-23 14:13:35,944 INFO L226 Difference]: Without dead ends: 381 [2022-11-23 14:13:35,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:13:35,944 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 54 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 1399 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:13:35,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 1399 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-23 14:13:35,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-11-23 14:13:35,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 330. [2022-11-23 14:13:35,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 204 states have (on average 1.642156862745098) internal successors, (335), 305 states have internal predecessors, (335), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 18 states have call predecessors, (23), 16 states have call successors, (23) [2022-11-23 14:13:35,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 374 transitions. [2022-11-23 14:13:35,951 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 374 transitions. Word has length 42 [2022-11-23 14:13:35,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:13:35,951 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 374 transitions. [2022-11-23 14:13:35,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-23 14:13:35,951 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 374 transitions. [2022-11-23 14:13:35,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-23 14:13:35,952 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:13:35,952 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:13:35,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Forceful destruction successful, exit code 0 [2022-11-23 14:13:36,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:13:36,164 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr79ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:13:36,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:13:36,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1935452453, now seen corresponding path program 1 times [2022-11-23 14:13:36,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:13:36,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1446024594] [2022-11-23 14:13:36,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:36,165 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:13:36,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:13:36,166 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:13:36,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-11-23 14:13:36,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:36,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:13:36,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:36,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:13:36,442 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:13:36,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:13:36,597 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:13:36,598 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:13:36,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1446024594] [2022-11-23 14:13:36,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1446024594] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:13:36,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [988532936] [2022-11-23 14:13:36,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:36,598 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:13:36,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:13:36,599 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:13:36,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (91)] Waiting until timeout for monitored process [2022-11-23 14:13:36,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:36,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:13:36,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:36,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:13:36,965 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:13:36,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:13:37,098 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:13:37,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [988532936] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:13:37,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928604899] [2022-11-23 14:13:37,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:37,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:13:37,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:13:37,099 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:13:37,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-11-23 14:13:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:37,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:13:37,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:37,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:13:37,345 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:13:37,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:13:37,498 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:13:37,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928604899] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:13:37,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:13:37,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 6 [2022-11-23 14:13:37,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364408271] [2022-11-23 14:13:37,499 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:13:37,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:13:37,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:13:37,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:13:37,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:13:37,500 INFO L87 Difference]: Start difference. First operand 330 states and 374 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 14:13:39,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:13:39,503 INFO L93 Difference]: Finished difference Result 348 states and 388 transitions. [2022-11-23 14:13:39,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:13:39,504 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2022-11-23 14:13:39,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:13:39,505 INFO L225 Difference]: With dead ends: 348 [2022-11-23 14:13:39,505 INFO L226 Difference]: Without dead ends: 348 [2022-11-23 14:13:39,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 245 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:13:39,505 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 196 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:13:39,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 831 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-23 14:13:39,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-11-23 14:13:39,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 333. [2022-11-23 14:13:39,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 207 states have (on average 1.6328502415458936) internal successors, (338), 308 states have internal predecessors, (338), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 18 states have call predecessors, (23), 16 states have call successors, (23) [2022-11-23 14:13:39,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 377 transitions. [2022-11-23 14:13:39,511 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 377 transitions. Word has length 43 [2022-11-23 14:13:39,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:13:39,512 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 377 transitions. [2022-11-23 14:13:39,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 14:13:39,512 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 377 transitions. [2022-11-23 14:13:39,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-23 14:13:39,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:13:39,513 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:13:39,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-11-23 14:13:39,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Forceful destruction successful, exit code 0 [2022-11-23 14:13:39,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (91)] Forceful destruction successful, exit code 0 [2022-11-23 14:13:40,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:13:40,119 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:13:40,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:13:40,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1150380693, now seen corresponding path program 1 times [2022-11-23 14:13:40,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:13:40,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1168029200] [2022-11-23 14:13:40,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:40,120 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:13:40,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:13:40,121 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:13:40,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Waiting until timeout for monitored process [2022-11-23 14:13:40,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:40,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-23 14:13:40,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:40,426 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:13:40,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 14:13:40,584 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:13:40,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 14:13:40,800 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:13:40,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 14:13:41,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:13:41,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:13:41,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:13:41,195 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:13:41,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:13:41,448 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:13:41,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1168029200] [2022-11-23 14:13:41,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1168029200] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:13:41,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1222877104] [2022-11-23 14:13:41,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:41,448 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:13:41,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:13:41,449 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:13:41,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (94)] Waiting until timeout for monitored process [2022-11-23 14:13:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:41,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-23 14:13:41,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:41,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-23 14:13:41,904 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:13:41,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 14:13:42,104 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:13:42,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 14:13:42,659 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-23 14:13:42,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-23 14:13:43,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 30 [2022-11-23 14:13:43,913 INFO L321 Elim1Store]: treesize reduction 60, result has 27.7 percent of original size [2022-11-23 14:13:43,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 53 [2022-11-23 14:13:44,588 INFO L321 Elim1Store]: treesize reduction 64, result has 26.4 percent of original size [2022-11-23 14:13:44,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 53 [2022-11-23 14:13:44,705 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:13:44,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:13:45,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1222877104] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:13:45,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700042446] [2022-11-23 14:13:45,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:45,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:13:45,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:13:45,444 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:13:45,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-11-23 14:13:45,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:45,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-23 14:13:45,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:45,799 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:13:45,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 14:13:46,104 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-23 14:13:46,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-23 14:13:46,519 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-23 14:13:46,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-23 14:13:47,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 32 [2022-11-23 14:13:47,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 32 [2022-11-23 14:13:47,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2022-11-23 14:13:47,260 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 14:13:47,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:13:47,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700042446] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:13:47,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:13:47,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17, 10] total 28 [2022-11-23 14:13:47,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709796168] [2022-11-23 14:13:47,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:13:47,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-23 14:13:47,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:13:47,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-23 14:13:47,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1151, Unknown=0, NotChecked=0, Total=1482 [2022-11-23 14:13:47,483 INFO L87 Difference]: Start difference. First operand 333 states and 377 transitions. Second operand has 30 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 21 states have internal predecessors, (69), 10 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-23 14:13:51,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:13:53,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:13:55,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:13:57,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:13:59,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:14:02,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:14:04,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:14:06,248 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:14:08,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:14:10,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:14:12,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:14:14,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:14:16,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:14:18,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:14:20,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:14:22,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:14:25,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:14:27,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:14:31,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:14:33,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:14:35,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:14:37,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:14:39,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:14:41,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:14:43,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:14:45,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:14:47,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:14:49,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:14:51,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:14:53,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:14:55,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:14:57,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:14:58,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:15:00,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:15:02,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:15:04,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:15:06,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:15:09,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:15:11,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:15:13,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:15:16,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:15:19,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:15:21,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:15:23,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:15:25,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:15:27,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:15:29,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:15:31,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:15:33,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:15:35,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:15:37,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:15:39,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:15:41,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:15:44,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:15:46,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:15:48,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:15:51,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:15:53,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:15:55,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:15:58,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:16:00,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:16:02,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:16:04,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:16:06,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:16:08,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:16:10,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:16:12,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:16:14,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:16:17,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:16:19,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:16:21,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:16:23,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:16:25,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:16:27,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:16:29,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:16:29,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:16:29,950 INFO L93 Difference]: Finished difference Result 401 states and 445 transitions. [2022-11-23 14:16:29,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-23 14:16:29,951 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 21 states have internal predecessors, (69), 10 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 43 [2022-11-23 14:16:29,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:16:29,953 INFO L225 Difference]: With dead ends: 401 [2022-11-23 14:16:29,953 INFO L226 Difference]: Without dead ends: 401 [2022-11-23 14:16:29,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 122 SyntacticMatches, 10 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=613, Invalid=2142, Unknown=1, NotChecked=0, Total=2756 [2022-11-23 14:16:29,953 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 1048 mSDsluCounter, 1927 mSDsCounter, 0 mSdLazyCounter, 2131 mSolverCounterSat, 194 mSolverCounterUnsat, 73 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 158.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1048 SdHoareTripleChecker+Valid, 2122 SdHoareTripleChecker+Invalid, 2398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 2131 IncrementalHoareTripleChecker+Invalid, 73 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 159.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:16:29,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1048 Valid, 2122 Invalid, 2398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 2131 Invalid, 73 Unknown, 0 Unchecked, 159.0s Time] [2022-11-23 14:16:29,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-11-23 14:16:29,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 335. [2022-11-23 14:16:29,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 209 states have (on average 1.6267942583732058) internal successors, (340), 310 states have internal predecessors, (340), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 18 states have call predecessors, (23), 16 states have call successors, (23) [2022-11-23 14:16:29,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 379 transitions. [2022-11-23 14:16:29,957 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 379 transitions. Word has length 43 [2022-11-23 14:16:29,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:16:29,957 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 379 transitions. [2022-11-23 14:16:29,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 21 states have internal predecessors, (69), 10 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2022-11-23 14:16:29,957 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 379 transitions. [2022-11-23 14:16:29,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-23 14:16:29,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:16:29,958 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:16:29,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-11-23 14:16:30,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (93)] Ended with exit code 0 [2022-11-23 14:16:30,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (94)] Forceful destruction successful, exit code 0 [2022-11-23 14:16:30,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:16:30,558 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:16:30,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:16:30,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1670659867, now seen corresponding path program 1 times [2022-11-23 14:16:30,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:16:30,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1092768916] [2022-11-23 14:16:30,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:16:30,559 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:16:30,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:16:30,560 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:16:30,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2022-11-23 14:16:30,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:16:30,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:16:30,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:16:30,831 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:16:30,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 14:16:30,842 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-23 14:16:30,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:16:30,842 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:16:30,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1092768916] [2022-11-23 14:16:30,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1092768916] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:16:30,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:16:30,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:16:30,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083895896] [2022-11-23 14:16:30,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:16:30,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:16:30,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:16:30,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:16:30,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:16:30,844 INFO L87 Difference]: Start difference. First operand 335 states and 379 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-23 14:16:31,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:16:31,398 INFO L93 Difference]: Finished difference Result 334 states and 378 transitions. [2022-11-23 14:16:31,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:16:31,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2022-11-23 14:16:31,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:16:31,400 INFO L225 Difference]: With dead ends: 334 [2022-11-23 14:16:31,401 INFO L226 Difference]: Without dead ends: 334 [2022-11-23 14:16:31,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:16:31,401 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 14 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:16:31,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 712 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:16:31,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-11-23 14:16:31,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 334. [2022-11-23 14:16:31,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 209 states have (on average 1.6220095693779903) internal successors, (339), 309 states have internal predecessors, (339), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 18 states have call predecessors, (23), 16 states have call successors, (23) [2022-11-23 14:16:31,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 378 transitions. [2022-11-23 14:16:31,405 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 378 transitions. Word has length 44 [2022-11-23 14:16:31,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:16:31,405 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 378 transitions. [2022-11-23 14:16:31,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-23 14:16:31,406 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 378 transitions. [2022-11-23 14:16:31,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-23 14:16:31,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:16:31,406 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:16:31,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (96)] Forceful destruction successful, exit code 0 [2022-11-23 14:16:31,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:16:31,619 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:16:31,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:16:31,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1670659868, now seen corresponding path program 1 times [2022-11-23 14:16:31,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:16:31,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1193567989] [2022-11-23 14:16:31,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:16:31,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:16:31,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:16:31,621 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:16:31,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (97)] Waiting until timeout for monitored process [2022-11-23 14:16:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:16:31,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 14:16:31,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:16:31,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:16:31,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:16:31,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 14:16:31,997 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:16:31,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:16:32,034 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:16:32,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:16:34,417 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:16:34,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 63 [2022-11-23 14:16:36,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-11-23 14:16:36,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:16:36,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2022-11-23 14:16:37,433 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:16:37,433 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:16:37,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1193567989] [2022-11-23 14:16:37,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1193567989] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:16:37,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1155802766] [2022-11-23 14:16:37,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:16:37,434 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:16:37,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:16:37,435 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:16:37,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (98)] Waiting until timeout for monitored process [2022-11-23 14:16:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:16:37,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 14:16:37,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:16:38,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:16:38,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 14:16:38,504 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:16:38,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:16:42,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2022-11-23 14:16:44,216 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:16:44,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1155802766] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:16:44,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089372633] [2022-11-23 14:16:44,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:16:44,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:16:44,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:16:44,219 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:16:44,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-11-23 14:16:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:16:44,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 14:16:44,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:16:44,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:16:44,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 14:16:44,553 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:16:44,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:16:44,558 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:16:44,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:16:45,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2022-11-23 14:16:45,770 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:16:45,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 72 [2022-11-23 14:16:46,145 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:16:46,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089372633] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:16:46,146 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:16:46,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7, 6, 6, 6] total 22 [2022-11-23 14:16:46,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105748905] [2022-11-23 14:16:46,146 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:16:46,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-23 14:16:46,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:16:46,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-23 14:16:46,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=427, Unknown=4, NotChecked=0, Total=506 [2022-11-23 14:16:46,147 INFO L87 Difference]: Start difference. First operand 334 states and 378 transitions. Second operand has 23 states, 22 states have (on average 3.909090909090909) internal successors, (86), 19 states have internal predecessors, (86), 5 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (21), 9 states have call predecessors, (21), 5 states have call successors, (21) [2022-11-23 14:17:02,921 WARN L233 SmtUtils]: Spent 8.25s on a formula simplification. DAG size of input: 40 DAG size of output: 33 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:17:04,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 14:17:07,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 14:17:09,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 14:17:13,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:17:13,748 INFO L93 Difference]: Finished difference Result 333 states and 377 transitions. [2022-11-23 14:17:13,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:17:13,750 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.909090909090909) internal successors, (86), 19 states have internal predecessors, (86), 5 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (21), 9 states have call predecessors, (21), 5 states have call successors, (21) Word has length 44 [2022-11-23 14:17:13,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:17:13,751 INFO L225 Difference]: With dead ends: 333 [2022-11-23 14:17:13,751 INFO L226 Difference]: Without dead ends: 333 [2022-11-23 14:17:13,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 236 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 27.4s TimeCoverageRelationStatistics Valid=115, Invalid=527, Unknown=8, NotChecked=0, Total=650 [2022-11-23 14:17:13,752 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 1218 mSDsluCounter, 2474 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 65 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1228 SdHoareTripleChecker+Valid, 2748 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:17:13,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1228 Valid, 2748 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1102 Invalid, 3 Unknown, 0 Unchecked, 11.0s Time] [2022-11-23 14:17:13,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-11-23 14:17:13,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2022-11-23 14:17:13,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 209 states have (on average 1.6172248803827751) internal successors, (338), 308 states have internal predecessors, (338), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 18 states have call predecessors, (23), 16 states have call successors, (23) [2022-11-23 14:17:13,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 377 transitions. [2022-11-23 14:17:13,758 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 377 transitions. Word has length 44 [2022-11-23 14:17:13,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:17:13,758 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 377 transitions. [2022-11-23 14:17:13,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.909090909090909) internal successors, (86), 19 states have internal predecessors, (86), 5 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (21), 9 states have call predecessors, (21), 5 states have call successors, (21) [2022-11-23 14:17:13,759 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 377 transitions. [2022-11-23 14:17:13,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-23 14:17:13,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:17:13,760 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:17:13,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-11-23 14:17:13,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (97)] Forceful destruction successful, exit code 0 [2022-11-23 14:17:14,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (98)] Ended with exit code 0 [2022-11-23 14:17:14,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:17:14,374 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr91REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:17:14,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:17:14,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1709262998, now seen corresponding path program 1 times [2022-11-23 14:17:14,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:17:14,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283316930] [2022-11-23 14:17:14,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:17:14,375 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:17:14,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:17:14,376 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:17:14,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2022-11-23 14:17:14,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:17:14,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-23 14:17:14,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:17:14,744 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:17:14,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:17:14,984 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-11-23 14:17:14,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2022-11-23 14:17:15,181 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:17:15,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:17:15,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 14:17:15,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-23 14:17:15,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:17:17,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:17:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 14:17:17,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:17:18,103 INFO L321 Elim1Store]: treesize reduction 7, result has 50.0 percent of original size [2022-11-23 14:17:18,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2022-11-23 14:17:18,373 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:17:18,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283316930] [2022-11-23 14:17:18,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1283316930] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:17:18,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [599244483] [2022-11-23 14:17:18,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:17:18,375 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:17:18,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:17:18,376 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:17:18,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (101)] Waiting until timeout for monitored process [2022-11-23 14:17:18,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:17:18,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 14:17:18,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:17:21,164 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-23 14:17:21,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 24 [2022-11-23 14:17:21,604 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:17:21,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-23 14:17:21,923 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:17:21,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-11-23 14:17:21,929 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:17:21,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2022-11-23 14:17:22,216 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:17:22,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-11-23 14:17:22,244 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 14:17:22,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:17:22,750 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:17:22,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2022-11-23 14:17:22,944 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 16 refuted. 2 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 14:17:22,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:17:22,981 INFO L321 Elim1Store]: treesize reduction 7, result has 50.0 percent of original size [2022-11-23 14:17:22,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2022-11-23 14:17:23,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [599244483] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:17:23,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493810596] [2022-11-23 14:17:23,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:17:23,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:17:23,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:17:23,200 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:17:23,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-11-23 14:17:23,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:17:23,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 14:17:23,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:17:23,578 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:17:23,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:17:23,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 14:17:24,015 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:17:24,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:17:24,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 14:17:24,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:17:24,472 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-23 14:17:24,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 41 [2022-11-23 14:17:24,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:17:24,732 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:17:24,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:17:24,902 INFO L321 Elim1Store]: treesize reduction 7, result has 50.0 percent of original size [2022-11-23 14:17:24,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 192 treesize of output 185 [2022-11-23 14:17:25,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493810596] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:17:25,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:17:25,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 36 [2022-11-23 14:17:25,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935307293] [2022-11-23 14:17:25,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:17:25,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-23 14:17:25,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:17:25,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-23 14:17:25,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1764, Unknown=8, NotChecked=0, Total=2070 [2022-11-23 14:17:25,511 INFO L87 Difference]: Start difference. First operand 333 states and 377 transitions. Second operand has 38 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 32 states have internal predecessors, (92), 10 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2022-11-23 14:17:34,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:17:36,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:17:38,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:17:40,115 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:17:42,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:17:44,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:17:46,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:17:48,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:17:50,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:17:52,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:17:55,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:17:57,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:17:59,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:18:01,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:18:03,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:18:05,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:18:07,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:18:11,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:18:13,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:18:15,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:18:17,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:18:19,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:18:21,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:18:23,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:18:25,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:18:27,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:18:29,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:18:31,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:18:33,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:18:35,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:18:37,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:18:44,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:18:44,414 INFO L93 Difference]: Finished difference Result 379 states and 424 transitions. [2022-11-23 14:18:44,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 14:18:44,415 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 32 states have internal predecessors, (92), 10 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) Word has length 45 [2022-11-23 14:18:44,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:18:44,416 INFO L225 Difference]: With dead ends: 379 [2022-11-23 14:18:44,416 INFO L226 Difference]: Without dead ends: 379 [2022-11-23 14:18:44,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=579, Invalid=2940, Unknown=21, NotChecked=0, Total=3540 [2022-11-23 14:18:44,416 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 728 mSDsluCounter, 3056 mSDsCounter, 0 mSdLazyCounter, 2065 mSolverCounterSat, 111 mSolverCounterUnsat, 93 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 68.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 3339 SdHoareTripleChecker+Invalid, 2269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 2065 IncrementalHoareTripleChecker+Invalid, 93 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 68.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:18:44,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 3339 Invalid, 2269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 2065 Invalid, 93 Unknown, 0 Unchecked, 68.7s Time] [2022-11-23 14:18:44,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-11-23 14:18:44,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 350. [2022-11-23 14:18:44,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 225 states have (on average 1.6) internal successors, (360), 324 states have internal predecessors, (360), 16 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (20), 18 states have call predecessors, (20), 16 states have call successors, (20) [2022-11-23 14:18:44,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 396 transitions. [2022-11-23 14:18:44,421 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 396 transitions. Word has length 45 [2022-11-23 14:18:44,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:18:44,422 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 396 transitions. [2022-11-23 14:18:44,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 32 states have internal predecessors, (92), 10 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2022-11-23 14:18:44,422 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 396 transitions. [2022-11-23 14:18:44,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-23 14:18:44,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:18:44,422 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:18:44,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (101)] Ended with exit code 0 [2022-11-23 14:18:44,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (100)] Ended with exit code 0 [2022-11-23 14:18:44,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-11-23 14:18:45,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:18:45,023 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr92REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:18:45,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:18:45,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1709262999, now seen corresponding path program 1 times [2022-11-23 14:18:45,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:18:45,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1979253766] [2022-11-23 14:18:45,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:18:45,024 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:18:45,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:18:45,025 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:18:45,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (103)] Waiting until timeout for monitored process [2022-11-23 14:18:45,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:18:45,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-23 14:18:45,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:18:45,876 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:18:45,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:18:45,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 14:18:45,928 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:18:45,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:18:45,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 14:18:46,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:18:46,588 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-23 14:18:46,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-23 14:18:46,627 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-23 14:18:46,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-23 14:18:46,973 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:18:46,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 101 [2022-11-23 14:18:48,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:18:49,395 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:18:49,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 71 [2022-11-23 14:18:49,419 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:18:49,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 59 [2022-11-23 14:18:49,464 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:18:49,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 79 [2022-11-23 14:18:50,078 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:18:50,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:18:50,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2022-11-23 14:18:52,447 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:18:52,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 141 [2022-11-23 14:18:53,887 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:18:53,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1979253766] [2022-11-23 14:18:53,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1979253766] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:18:53,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [833521024] [2022-11-23 14:18:53,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:18:53,888 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:18:53,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:18:53,889 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:18:53,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (104)] Waiting until timeout for monitored process [2022-11-23 14:18:54,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:18:54,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-23 14:18:54,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:18:55,107 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:18:55,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-11-23 14:18:55,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:55,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-23 14:18:55,167 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:18:55,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:18:55,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 14:18:55,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:18:55,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:56,011 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-23 14:18:56,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 39 [2022-11-23 14:18:56,056 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-23 14:18:56,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-23 14:18:56,561 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:18:56,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 111 [2022-11-23 14:19:00,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:19:01,361 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:19:01,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 51 [2022-11-23 14:19:01,402 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:19:01,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 50 [2022-11-23 14:19:01,462 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:19:01,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 67 [2022-11-23 14:19:01,763 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:19:01,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:19:01,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2022-11-23 14:19:02,932 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:19:02,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 141 [2022-11-23 14:19:03,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [833521024] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:19:03,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667367480] [2022-11-23 14:19:03,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:19:03,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:19:03,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:19:03,800 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:19:03,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-11-23 14:19:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:19:04,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-23 14:19:04,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:19:04,584 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:19:04,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:19:05,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 14:19:05,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 14:19:05,205 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:19:05,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:19:05,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 14:19:05,253 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:19:05,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:19:05,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-23 14:19:05,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:19:06,166 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-23 14:19:06,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 48 [2022-11-23 14:19:06,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:19:06,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:19:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:19:06,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:19:06,731 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:19:06,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 42 [2022-11-23 14:19:07,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 92 [2022-11-23 14:19:09,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667367480] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:19:09,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:19:09,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 12] total 38 [2022-11-23 14:19:09,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803550694] [2022-11-23 14:19:09,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:19:09,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-23 14:19:09,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:19:09,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-23 14:19:09,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=2317, Unknown=3, NotChecked=0, Total=2652 [2022-11-23 14:19:09,798 INFO L87 Difference]: Start difference. First operand 350 states and 396 transitions. Second operand has 40 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 33 states have internal predecessors, (100), 10 states have call successors, (12), 6 states have call predecessors, (12), 10 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2022-11-23 14:19:13,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:19:16,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:19:18,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:19:22,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:19:24,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:19:35,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:19:37,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:19:40,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:19:42,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:19:44,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:19:46,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:19:49,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:19:51,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:19:52,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:19:52,672 INFO L93 Difference]: Finished difference Result 391 states and 431 transitions. [2022-11-23 14:19:52,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-23 14:19:52,673 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 33 states have internal predecessors, (100), 10 states have call successors, (12), 6 states have call predecessors, (12), 10 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) Word has length 45 [2022-11-23 14:19:52,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:19:52,674 INFO L225 Difference]: With dead ends: 391 [2022-11-23 14:19:52,674 INFO L226 Difference]: Without dead ends: 389 [2022-11-23 14:19:52,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 150 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=767, Invalid=4780, Unknown=3, NotChecked=0, Total=5550 [2022-11-23 14:19:52,676 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 534 mSDsluCounter, 4305 mSDsCounter, 0 mSdLazyCounter, 3060 mSolverCounterSat, 61 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 4594 SdHoareTripleChecker+Invalid, 3134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 3060 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:19:52,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 4594 Invalid, 3134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 3060 Invalid, 13 Unknown, 0 Unchecked, 37.2s Time] [2022-11-23 14:19:52,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-11-23 14:19:52,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 360. [2022-11-23 14:19:52,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 233 states have (on average 1.5793991416309012) internal successors, (368), 332 states have internal predecessors, (368), 16 states have call successors, (16), 11 states have call predecessors, (16), 13 states have return successors, (20), 18 states have call predecessors, (20), 16 states have call successors, (20) [2022-11-23 14:19:52,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 404 transitions. [2022-11-23 14:19:52,682 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 404 transitions. Word has length 45 [2022-11-23 14:19:52,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:19:52,682 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 404 transitions. [2022-11-23 14:19:52,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 33 states have internal predecessors, (100), 10 states have call successors, (12), 6 states have call predecessors, (12), 10 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2022-11-23 14:19:52,683 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 404 transitions. [2022-11-23 14:19:52,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-23 14:19:52,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:19:52,683 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 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] [2022-11-23 14:19:52,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (104)] Forceful destruction successful, exit code 0 [2022-11-23 14:19:52,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (103)] Forceful destruction successful, exit code 0 [2022-11-23 14:19:53,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-11-23 14:19:53,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:19:53,296 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr82ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:19:53,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:19:53,296 INFO L85 PathProgramCache]: Analyzing trace with hash -871510309, now seen corresponding path program 1 times [2022-11-23 14:19:53,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:19:53,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1349987430] [2022-11-23 14:19:53,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:19:53,297 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:19:53,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:19:53,298 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:19:53,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (106)] Waiting until timeout for monitored process [2022-11-23 14:19:53,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:19:53,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 14:19:53,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:19:53,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:19:53,645 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:19:53,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 14:19:53,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:19:53,790 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:19:53,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:19:54,260 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:19:54,260 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:19:54,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1349987430] [2022-11-23 14:19:54,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1349987430] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:19:54,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1945456948] [2022-11-23 14:19:54,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:19:54,261 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:19:54,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:19:54,262 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:19:54,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (107)] Waiting until timeout for monitored process [2022-11-23 14:19:54,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:19:54,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 14:19:54,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:19:54,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:19:54,766 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:19:54,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 14:19:54,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:19:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:19:54,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:19:55,279 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:19:55,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1945456948] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:19:55,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224737140] [2022-11-23 14:19:55,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:19:55,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:19:55,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:19:55,281 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:19:55,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-11-23 14:19:55,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:19:55,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 14:19:55,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:19:55,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:19:55,595 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:19:55,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 14:19:55,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:19:55,683 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:19:55,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:19:56,176 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:19:56,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224737140] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:19:56,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:19:56,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 10 [2022-11-23 14:19:56,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259504830] [2022-11-23 14:19:56,176 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:19:56,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 14:19:56,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:19:56,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 14:19:56,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:19:56,177 INFO L87 Difference]: Start difference. First operand 360 states and 404 transitions. Second operand has 11 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 14:19:58,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:19:58,672 INFO L93 Difference]: Finished difference Result 377 states and 418 transitions. [2022-11-23 14:19:58,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:19:58,673 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-11-23 14:19:58,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:19:58,675 INFO L225 Difference]: With dead ends: 377 [2022-11-23 14:19:58,675 INFO L226 Difference]: Without dead ends: 377 [2022-11-23 14:19:58,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 246 SyntacticMatches, 15 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:19:58,676 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 311 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:19:58,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 978 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-23 14:19:58,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-11-23 14:19:58,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 360. [2022-11-23 14:19:58,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 233 states have (on average 1.5751072961373391) internal successors, (367), 332 states have internal predecessors, (367), 16 states have call successors, (16), 11 states have call predecessors, (16), 13 states have return successors, (20), 18 states have call predecessors, (20), 16 states have call successors, (20) [2022-11-23 14:19:58,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 403 transitions. [2022-11-23 14:19:58,691 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 403 transitions. Word has length 46 [2022-11-23 14:19:58,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:19:58,691 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 403 transitions. [2022-11-23 14:19:58,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 14:19:58,691 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 403 transitions. [2022-11-23 14:19:58,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-23 14:19:58,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:19:58,692 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:19:58,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (106)] Forceful destruction successful, exit code 0 [2022-11-23 14:19:58,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (107)] Forceful destruction successful, exit code 0 [2022-11-23 14:19:59,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-11-23 14:19:59,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:19:59,305 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-23 14:19:59,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:19:59,305 INFO L85 PathProgramCache]: Analyzing trace with hash -813633540, now seen corresponding path program 1 times [2022-11-23 14:19:59,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:19:59,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2116810333] [2022-11-23 14:19:59,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:19:59,306 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:19:59,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:19:59,306 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:19:59,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (109)] Waiting until timeout for monitored process [2022-11-23 14:19:59,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:19:59,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-23 14:19:59,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:19:59,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:19:59,687 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:19:59,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:19:59,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:20:01,821 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_126| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_51| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_126| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_126|) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_51|)))) is different from true [2022-11-23 14:20:01,918 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 14:20:01,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2022-11-23 14:20:01,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-23 14:20:06,063 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_52| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_127| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_127| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_127|) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_52|)))) (exists ((v_ArrVal_1880 (_ BitVec 1)) (|ldv_malloc_#res.base| (_ BitVec 32))) (and (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_1880)) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|))))) is different from true [2022-11-23 14:20:06,127 INFO L321 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-11-23 14:20:06,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 35 [2022-11-23 14:20:06,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 28 [2022-11-23 14:20:06,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-23 14:20:10,493 INFO L321 Elim1Store]: treesize reduction 56, result has 35.6 percent of original size [2022-11-23 14:20:10,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 51 [2022-11-23 14:20:10,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 32 [2022-11-23 14:20:10,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-23 14:20:10,844 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-23 14:20:10,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 36 [2022-11-23 14:20:10,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-23 14:20:11,089 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 20 not checked. [2022-11-23 14:20:11,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:20:11,395 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_14| (_ BitVec 32)) (v_ArrVal_1886 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (select (store |c_#valid| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_14| (_ bv1 1)) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1886) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)) (_ bv1 1)) (_ bv0 1))) is different from false [2022-11-23 14:20:22,349 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:20:22,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2116810333] [2022-11-23 14:20:22,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2116810333] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:20:22,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [998745214] [2022-11-23 14:20:22,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:20:22,350 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:20:22,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:20:22,351 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:20:22,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (110)] Waiting until timeout for monitored process [2022-11-23 14:20:22,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:20:22,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-23 14:20:22,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:20:22,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:20:23,258 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:20:23,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:20:23,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:20:25,544 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_130| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_130| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_130|) (_ bv0 32))))) is different from true [2022-11-23 14:20:25,749 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 14:20:25,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2022-11-23 14:20:25,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-23 14:20:32,007 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_131| (_ BitVec 32))) (not (= (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_131|) (_ bv0 32)) |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_131|))) (exists ((v_ArrVal_1937 (_ BitVec 1)) (|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_1937))))) is different from true [2022-11-23 14:20:32,062 INFO L321 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-11-23 14:20:32,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 35 [2022-11-23 14:20:32,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:20:32,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 28 [2022-11-23 14:20:32,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-23 14:20:38,782 INFO L321 Elim1Store]: treesize reduction 56, result has 35.6 percent of original size [2022-11-23 14:20:38,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 51 [2022-11-23 14:20:39,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:20:39,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 32 [2022-11-23 14:20:39,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-23 14:20:39,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:20:39,718 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-23 14:20:39,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 48 [2022-11-23 14:20:39,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-11-23 14:20:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 20 not checked. [2022-11-23 14:20:40,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:20:43,957 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1943 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15| (_ BitVec 32))) (or (not (bvult |c_#StackHeapBarrier| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15|)) (= (_ bv0 1) (bvadd (select (store |c_#valid| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15| (_ bv1 1)) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1943) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)) (_ bv1 1))))) is different from false [2022-11-23 14:20:45,980 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1942 (_ BitVec 32)) (v_ArrVal_1943 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15| (_ BitVec 32))) (or (= (_ bv0 1) (bvadd (select (store |c_#valid| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15| (_ bv1 1)) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)) v_ArrVal_1942)) |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1943) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)) (_ bv1 1))) (not (bvult |c_#StackHeapBarrier| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15|)))) is different from false [2022-11-23 14:20:48,013 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1942 (_ BitVec 32)) (v_ArrVal_1943 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15| (_ BitVec 32))) (or (not (bvult |c_#StackHeapBarrier| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15|)) (= (bvadd (select (store |c_#valid| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15| (_ bv1 1)) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)) v_ArrVal_1942)) |c_ULTIMATE.start_entry_point_#t~ret69#1.base| v_ArrVal_1943) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)) (_ bv1 1)) (_ bv0 1)))) is different from false [2022-11-23 14:21:09,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [998745214] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:21:09,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337045885] [2022-11-23 14:21:09,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:21:09,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:21:09,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:21:09,605 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:21:09,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_16d8fe47-39fc-413c-9864-c99e2959c590/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-11-23 14:21:09,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:21:09,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-23 14:21:09,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:21:09,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:21:09,909 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:21:09,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:21:09,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:21:11,938 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_134| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_58| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_134| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_134|) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_58|)))) is different from true [2022-11-23 14:21:12,048 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 14:21:12,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2022-11-23 14:21:12,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-23 14:21:14,141 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1992 (_ BitVec 1)) (|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_1992) |c_#valid|))) (exists ((|v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_52| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_127| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_127| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_127|) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_52|))))) is different from true [2022-11-23 14:21:14,200 INFO L321 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-11-23 14:21:14,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 35 [2022-11-23 14:21:14,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 28 [2022-11-23 14:21:14,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-23 14:21:18,662 INFO L321 Elim1Store]: treesize reduction 56, result has 35.6 percent of original size [2022-11-23 14:21:18,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 51 [2022-11-23 14:21:19,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 32 [2022-11-23 14:21:19,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-23 14:21:19,548 INFO L321 Elim1Store]: treesize reduction 78, result has 35.0 percent of original size [2022-11-23 14:21:19,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 67 [2022-11-23 14:21:19,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-11-23 14:21:20,470 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 20 not checked. [2022-11-23 14:21:20,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:21:27,083 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1999 (_ BitVec 1)) (|v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_16| (_ BitVec 32)) (v_ArrVal_1998 (Array (_ BitVec 32) (_ BitVec 32)))) (or (= (bvadd (_ bv1 1) (select (store |c_#valid| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_16| v_ArrVal_1999) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1998) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|))) (_ bv0 1)) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_16|))))) is different from false [2022-11-23 14:22:07,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337045885] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:22:07,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:22:07,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 48 [2022-11-23 14:22:07,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951254304] [2022-11-23 14:22:07,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:22:07,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-23 14:22:07,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:22:07,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-23 14:22:07,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=2755, Unknown=50, NotChecked=1298, Total=4422 [2022-11-23 14:22:07,413 INFO L87 Difference]: Start difference. First operand 360 states and 403 transitions. Second operand has 49 states, 47 states have (on average 1.7234042553191489) internal successors, (81), 42 states have internal predecessors, (81), 9 states have call successors, (10), 7 states have call predecessors, (10), 13 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2022-11-23 14:22:09,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:22:11,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:22:13,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:22:15,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:22:17,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:22:19,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:22:21,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:22:49,167 WARN L233 SmtUtils]: Spent 8.31s on a formula simplification. DAG size of input: 67 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:22:58,845 WARN L233 SmtUtils]: Spent 8.39s on a formula simplification. DAG size of input: 67 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:23:01,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:23:03,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:23:07,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:23:19,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:23:21,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:23:23,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:23:25,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:23:27,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0]