./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c --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_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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_3828d898-1838-45be-8385-04a4c94342af/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 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f --- 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 15:26:58,089 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:26:58,091 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:26:58,110 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:26:58,113 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:26:58,117 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:26:58,120 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:26:58,123 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:26:58,125 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:26:58,130 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:26:58,132 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:26:58,134 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:26:58,135 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:26:58,137 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:26:58,139 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:26:58,142 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:26:58,144 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:26:58,145 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:26:58,146 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:26:58,153 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:26:58,154 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:26:58,156 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:26:58,158 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:26:58,159 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:26:58,169 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:26:58,169 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:26:58,169 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:26:58,171 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:26:58,172 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:26:58,173 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:26:58,174 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:26:58,175 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:26:58,177 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:26:58,178 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:26:58,180 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:26:58,180 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:26:58,181 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:26:58,182 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:26:58,182 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:26:58,183 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:26:58,183 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:26:58,184 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-23 15:26:58,220 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:26:58,223 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:26:58,224 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:26:58,224 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:26:58,225 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:26:58,225 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:26:58,226 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:26:58,226 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:26:58,226 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:26:58,227 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:26:58,228 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:26:58,228 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:26:58,228 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:26:58,229 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:26:58,229 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:26:58,229 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:26:58,229 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:26:58,230 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:26:58,230 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 15:26:58,231 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 15:26:58,231 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:26:58,231 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:26:58,231 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 15:26:58,232 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:26:58,232 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:26:58,232 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:26:58,232 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 15:26:58,233 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 15:26:58,233 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 15:26:58,234 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:26:58,234 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 15:26:58,234 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:26:58,234 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:26:58,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:26:58,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:26:58,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:26:58,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:26:58,236 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:26:58,236 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:26:58,236 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:26:58,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:26:58,237 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:26:58,237 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_3828d898-1838-45be-8385-04a4c94342af/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f [2022-11-23 15:26:58,540 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:26:58,575 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:26:58,581 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:26:58,582 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:26:58,582 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:26:58,584 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2022-11-23 15:27:01,884 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:27:02,136 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:27:02,137 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2022-11-23 15:27:02,145 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/data/80cdb501b/37656776b79a4010aba4e2b537aa77ae/FLAG8323f661b [2022-11-23 15:27:02,163 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/data/80cdb501b/37656776b79a4010aba4e2b537aa77ae [2022-11-23 15:27:02,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:27:02,168 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:27:02,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:27:02,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:27:02,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:27:02,179 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:27:02" (1/1) ... [2022-11-23 15:27:02,180 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c9d095a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:02, skipping insertion in model container [2022-11-23 15:27:02,180 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:27:02" (1/1) ... [2022-11-23 15:27:02,190 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:27:02,230 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:27:02,415 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/sv-benchmarks/c/weaver/chl-node-symm.wvr.c[3305,3318] [2022-11-23 15:27:02,433 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:27:02,447 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 15:27:02,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5f24322a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:02, skipping insertion in model container [2022-11-23 15:27:02,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:27:02,448 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-23 15:27:02,450 INFO L158 Benchmark]: Toolchain (without parser) took 281.55ms. Allocated memory is still 121.6MB. Free memory was 79.0MB in the beginning and 68.9MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 15:27:02,450 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 98.6MB. Free memory is still 50.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 15:27:02,451 INFO L158 Benchmark]: CACSL2BoogieTranslator took 278.57ms. Allocated memory is still 121.6MB. Free memory was 79.0MB in the beginning and 68.9MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 15:27:02,452 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 98.6MB. Free memory is still 50.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 278.57ms. Allocated memory is still 121.6MB. Free memory was 79.0MB in the beginning and 68.9MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 102]: 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_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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_3828d898-1838-45be-8385-04a4c94342af/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 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f --- 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 15:27:05,055 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:27:05,059 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:27:05,087 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:27:05,087 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:27:05,092 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:27:05,095 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:27:05,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:27:05,101 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:27:05,108 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:27:05,109 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:27:05,113 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:27:05,113 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:27:05,117 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:27:05,120 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:27:05,121 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:27:05,122 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:27:05,123 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:27:05,125 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:27:05,127 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:27:05,129 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:27:05,130 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:27:05,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:27:05,133 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:27:05,136 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:27:05,137 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:27:05,137 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:27:05,138 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:27:05,139 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:27:05,140 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:27:05,140 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:27:05,141 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:27:05,142 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:27:05,143 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:27:05,144 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:27:05,145 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:27:05,164 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:27:05,164 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:27:05,165 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:27:05,166 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:27:05,167 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:27:05,169 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-23 15:27:05,218 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:27:05,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:27:05,219 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:27:05,219 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:27:05,221 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:27:05,221 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:27:05,221 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:27:05,221 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:27:05,222 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:27:05,222 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:27:05,223 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:27:05,223 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:27:05,224 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 15:27:05,225 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 15:27:05,225 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:27:05,225 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:27:05,225 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 15:27:05,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:27:05,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:27:05,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:27:05,226 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 15:27:05,227 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 15:27:05,227 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 15:27:05,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:27:05,227 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 15:27:05,228 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-23 15:27:05,228 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-23 15:27:05,228 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:27:05,228 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:27:05,229 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:27:05,229 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 15:27:05,229 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:27:05,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:27:05,230 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:27:05,230 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:27:05,231 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-23 15:27:05,231 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-23 15:27:05,231 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:27:05,231 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 15:27:05,232 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_3828d898-1838-45be-8385-04a4c94342af/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 514e162b13bdcbe99106b4f79e5a61b8afdae9b478788e06b35106cd952df62f [2022-11-23 15:27:05,669 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:27:05,711 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:27:05,715 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:27:05,716 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:27:05,717 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:27:05,719 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2022-11-23 15:27:08,918 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:27:09,119 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:27:09,119 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2022-11-23 15:27:09,134 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/data/d7bebee3a/ff3601d0638340119519ed52e065376e/FLAG5e2c58da4 [2022-11-23 15:27:09,149 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/data/d7bebee3a/ff3601d0638340119519ed52e065376e [2022-11-23 15:27:09,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:27:09,156 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:27:09,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:27:09,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:27:09,167 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:27:09,168 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:27:09" (1/1) ... [2022-11-23 15:27:09,170 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36091ec9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:09, skipping insertion in model container [2022-11-23 15:27:09,170 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:27:09" (1/1) ... [2022-11-23 15:27:09,177 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:27:09,208 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:27:09,387 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/sv-benchmarks/c/weaver/chl-node-symm.wvr.c[3305,3318] [2022-11-23 15:27:09,441 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:27:09,454 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-23 15:27:09,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:27:09,482 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/sv-benchmarks/c/weaver/chl-node-symm.wvr.c[3305,3318] [2022-11-23 15:27:09,490 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:27:09,501 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:27:09,526 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/sv-benchmarks/c/weaver/chl-node-symm.wvr.c[3305,3318] [2022-11-23 15:27:09,537 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:27:09,581 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:27:09,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:09 WrapperNode [2022-11-23 15:27:09,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:27:09,583 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:27:09,584 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:27:09,584 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:27:09,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:09" (1/1) ... [2022-11-23 15:27:09,601 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:09" (1/1) ... [2022-11-23 15:27:09,651 INFO L138 Inliner]: procedures = 28, calls = 50, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 270 [2022-11-23 15:27:09,652 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:27:09,655 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:27:09,655 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:27:09,656 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:27:09,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:09" (1/1) ... [2022-11-23 15:27:09,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:09" (1/1) ... [2022-11-23 15:27:09,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:09" (1/1) ... [2022-11-23 15:27:09,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:09" (1/1) ... [2022-11-23 15:27:09,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:09" (1/1) ... [2022-11-23 15:27:09,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:09" (1/1) ... [2022-11-23 15:27:09,714 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:09" (1/1) ... [2022-11-23 15:27:09,716 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:09" (1/1) ... [2022-11-23 15:27:09,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:27:09,729 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:27:09,730 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:27:09,730 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:27:09,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:09" (1/1) ... [2022-11-23 15:27:09,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:27:09,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:27:09,770 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:27:09,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:27:09,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:27:09,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-23 15:27:09,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-23 15:27:09,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:27:09,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-23 15:27:09,828 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 15:27:09,828 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 15:27:09,828 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 15:27:09,829 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 15:27:09,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 15:27:09,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:27:09,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:27:09,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-11-23 15:27:09,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:27:09,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-23 15:27:09,831 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 15:27:10,072 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:27:10,075 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:27:10,947 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:27:10,956 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:27:10,957 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-23 15:27:10,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:27:10 BoogieIcfgContainer [2022-11-23 15:27:10,959 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:27:10,961 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:27:10,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:27:10,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:27:10,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:27:09" (1/3) ... [2022-11-23 15:27:10,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62019295 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:27:10, skipping insertion in model container [2022-11-23 15:27:10,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:27:09" (2/3) ... [2022-11-23 15:27:10,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62019295 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:27:10, skipping insertion in model container [2022-11-23 15:27:10,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:27:10" (3/3) ... [2022-11-23 15:27:10,968 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-symm.wvr.c [2022-11-23 15:27:10,987 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:27:10,987 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2022-11-23 15:27:10,987 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 15:27:11,147 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-23 15:27:11,211 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 15:27:11,224 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 385 places, 406 transitions, 828 flow [2022-11-23 15:27:11,227 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 385 places, 406 transitions, 828 flow [2022-11-23 15:27:11,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 385 places, 406 transitions, 828 flow [2022-11-23 15:27:11,415 INFO L130 PetriNetUnfolder]: 28/404 cut-off events. [2022-11-23 15:27:11,415 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 15:27:11,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 404 events. 28/404 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 582 event pairs, 0 based on Foata normal form. 0/334 useless extension candidates. Maximal degree in co-relation 307. Up to 2 conditions per place. [2022-11-23 15:27:11,434 INFO L119 LiptonReduction]: Number of co-enabled transitions 11440 [2022-11-23 15:28:26,863 INFO L134 LiptonReduction]: Checked pairs total: 15509 [2022-11-23 15:28:26,863 INFO L136 LiptonReduction]: Total number of compositions: 478 [2022-11-23 15:28:26,870 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 71 places, 70 transitions, 156 flow [2022-11-23 15:28:26,951 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1215 states, 645 states have (on average 4.950387596899224) internal successors, (3193), 1214 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:26,995 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:28:27,010 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;@33faeef8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:28:27,010 INFO L358 AbstractCegarLoop]: Starting to check reachability of 68 error locations. [2022-11-23 15:28:27,045 INFO L276 IsEmpty]: Start isEmpty. Operand has 1215 states, 645 states have (on average 4.950387596899224) internal successors, (3193), 1214 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:27,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 15:28:27,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:28:27,056 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 15:28:27,058 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-23 15:28:27,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:28:27,067 INFO L85 PathProgramCache]: Analyzing trace with hash 50069, now seen corresponding path program 1 times [2022-11-23 15:28:27,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:28:27,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [841366500] [2022-11-23 15:28:27,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:27,083 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 15:28:27,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:28:27,095 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:28:27,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:28:27,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:27,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:28:27,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:28:27,367 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 15:28:27,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 15:28:27,409 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 15:28:27,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:28:27,410 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:28:27,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [841366500] [2022-11-23 15:28:27,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [841366500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:28:27,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:28:27,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 15:28:27,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860995399] [2022-11-23 15:28:27,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:28:27,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:28:27,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:28:27,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:28:27,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:28:27,467 INFO L87 Difference]: Start difference. First operand has 1215 states, 645 states have (on average 4.950387596899224) internal successors, (3193), 1214 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:28,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:28:28,043 INFO L93 Difference]: Finished difference Result 892 states and 2306 transitions. [2022-11-23 15:28:28,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:28:28,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-23 15:28:28,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:28:28,067 INFO L225 Difference]: With dead ends: 892 [2022-11-23 15:28:28,068 INFO L226 Difference]: Without dead ends: 892 [2022-11-23 15:28:28,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:28:28,072 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 56 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:28:28,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 2 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:28:28,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2022-11-23 15:28:28,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 892. [2022-11-23 15:28:28,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 489 states have (on average 4.715746421267894) internal successors, (2306), 891 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:28,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 2306 transitions. [2022-11-23 15:28:28,162 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 2306 transitions. Word has length 2 [2022-11-23 15:28:28,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:28:28,163 INFO L495 AbstractCegarLoop]: Abstraction has 892 states and 2306 transitions. [2022-11-23 15:28:28,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:28,163 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 2306 transitions. [2022-11-23 15:28:28,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 15:28:28,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:28:28,164 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 15:28:28,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:28:28,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:28:28,376 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-23 15:28:28,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:28:28,377 INFO L85 PathProgramCache]: Analyzing trace with hash 50070, now seen corresponding path program 1 times [2022-11-23 15:28:28,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:28:28,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1865881559] [2022-11-23 15:28:28,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:28,378 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 15:28:28,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:28:28,380 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:28:28,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:28:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:28,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 15:28:28,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:28:28,601 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 15:28:28,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 15:28:28,641 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 15:28:28,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:28:28,642 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:28:28,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1865881559] [2022-11-23 15:28:28,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1865881559] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:28:28,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:28:28,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 15:28:28,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964116445] [2022-11-23 15:28:28,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:28:28,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:28:28,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:28:28,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:28:28,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:28:28,645 INFO L87 Difference]: Start difference. First operand 892 states and 2306 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:29,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:28:29,272 INFO L93 Difference]: Finished difference Result 894 states and 2310 transitions. [2022-11-23 15:28:29,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:28:29,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-23 15:28:29,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:28:29,279 INFO L225 Difference]: With dead ends: 894 [2022-11-23 15:28:29,280 INFO L226 Difference]: Without dead ends: 894 [2022-11-23 15:28:29,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:28:29,281 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:28:29,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 15:28:29,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2022-11-23 15:28:29,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 894. [2022-11-23 15:28:29,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 491 states have (on average 4.704684317718941) internal successors, (2310), 893 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:29,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 2310 transitions. [2022-11-23 15:28:29,333 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 2310 transitions. Word has length 2 [2022-11-23 15:28:29,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:28:29,334 INFO L495 AbstractCegarLoop]: Abstraction has 894 states and 2310 transitions. [2022-11-23 15:28:29,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:29,334 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 2310 transitions. [2022-11-23 15:28:29,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 15:28:29,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:28:29,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 15:28:29,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:28:29,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:28:29,551 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-23 15:28:29,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:28:29,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1559770, now seen corresponding path program 1 times [2022-11-23 15:28:29,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:28:29,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [243005278] [2022-11-23 15:28:29,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:29,553 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 15:28:29,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:28:29,554 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:28:29,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:28:29,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:29,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 15:28:29,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:28:29,775 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 15:28:29,775 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 15:28:29,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:28:29,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:28:30,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:28:30,153 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:28:30,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [243005278] [2022-11-23 15:28:30,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [243005278] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:28:30,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [840047961] [2022-11-23 15:28:30,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:30,154 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 15:28:30,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 15:28:30,159 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 15:28:30,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-23 15:28:30,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:30,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 15:28:30,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:28:30,397 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 15:28:30,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 15:28:30,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:28:30,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:28:30,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:28:30,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [840047961] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:28:30,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955812853] [2022-11-23 15:28:30,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:30,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:28:30,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:28:30,531 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:28:30,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 15:28:30,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:30,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 15:28:30,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:28:30,722 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 15:28:30,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 15:28:30,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:28:30,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:28:30,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:28:30,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955812853] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:28:30,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 15:28:30,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-23 15:28:30,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331135433] [2022-11-23 15:28:30,985 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 15:28:30,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 15:28:30,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:28:30,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 15:28:30,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:28:30,987 INFO L87 Difference]: Start difference. First operand 894 states and 2310 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:33,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:28:33,643 INFO L93 Difference]: Finished difference Result 903 states and 2326 transitions. [2022-11-23 15:28:33,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:28:33,645 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-23 15:28:33,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:28:33,650 INFO L225 Difference]: With dead ends: 903 [2022-11-23 15:28:33,651 INFO L226 Difference]: Without dead ends: 903 [2022-11-23 15:28:33,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:28:33,652 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:28:33,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 10 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-23 15:28:33,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2022-11-23 15:28:33,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 900. [2022-11-23 15:28:33,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 497 states have (on average 4.6720321931589535) internal successors, (2322), 899 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:33,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2322 transitions. [2022-11-23 15:28:33,699 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2322 transitions. Word has length 3 [2022-11-23 15:28:33,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:28:33,699 INFO L495 AbstractCegarLoop]: Abstraction has 900 states and 2322 transitions. [2022-11-23 15:28:33,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:33,700 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2322 transitions. [2022-11-23 15:28:33,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-23 15:28:33,700 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:28:33,700 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-23 15:28:33,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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)] Ended with exit code 0 [2022-11-23 15:28:33,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 15:28:34,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-11-23 15:28:34,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 15:28:34,312 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-23 15:28:34,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:28:34,313 INFO L85 PathProgramCache]: Analyzing trace with hash 48471650, now seen corresponding path program 1 times [2022-11-23 15:28:34,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:28:34,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [720865063] [2022-11-23 15:28:34,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:34,314 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 15:28:34,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:28:34,314 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:28:34,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:28:34,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:34,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 15:28:34,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:28:34,408 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 15:28:34,415 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 15:28:34,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:28:34,415 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:28:34,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [720865063] [2022-11-23 15:28:34,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [720865063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:28:34,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:28:34,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:28:34,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392448277] [2022-11-23 15:28:34,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:28:34,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:28:34,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:28:34,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:28:34,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:28:34,417 INFO L87 Difference]: Start difference. First operand 900 states and 2322 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:34,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:28:34,905 INFO L93 Difference]: Finished difference Result 898 states and 2320 transitions. [2022-11-23 15:28:34,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:28:34,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-23 15:28:34,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:28:34,912 INFO L225 Difference]: With dead ends: 898 [2022-11-23 15:28:34,912 INFO L226 Difference]: Without dead ends: 898 [2022-11-23 15:28:34,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:28:34,913 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 50 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:28:34,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 2 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:28:34,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-11-23 15:28:34,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 898. [2022-11-23 15:28:34,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 497 states have (on average 4.668008048289739) internal successors, (2320), 897 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:34,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 2320 transitions. [2022-11-23 15:28:34,943 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 2320 transitions. Word has length 4 [2022-11-23 15:28:34,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:28:34,943 INFO L495 AbstractCegarLoop]: Abstraction has 898 states and 2320 transitions. [2022-11-23 15:28:34,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:34,944 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 2320 transitions. [2022-11-23 15:28:34,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-23 15:28:34,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:28:34,944 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-23 15:28:34,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:28:35,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:28:35,157 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-23 15:28:35,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:28:35,158 INFO L85 PathProgramCache]: Analyzing trace with hash 48471651, now seen corresponding path program 1 times [2022-11-23 15:28:35,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:28:35,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1366252949] [2022-11-23 15:28:35,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:35,159 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:28:35,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:28:35,160 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:28:35,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:28:35,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:35,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 15:28:35,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:28:35,314 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 15:28:35,338 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 15:28:35,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:28:35,339 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:28:35,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1366252949] [2022-11-23 15:28:35,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1366252949] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:28:35,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:28:35,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:28:35,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975094514] [2022-11-23 15:28:35,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:28:35,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:28:35,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:28:35,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:28:35,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:28:35,341 INFO L87 Difference]: Start difference. First operand 898 states and 2320 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:35,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:28:35,990 INFO L93 Difference]: Finished difference Result 899 states and 2322 transitions. [2022-11-23 15:28:35,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:28:35,992 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-23 15:28:35,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:28:35,997 INFO L225 Difference]: With dead ends: 899 [2022-11-23 15:28:35,998 INFO L226 Difference]: Without dead ends: 899 [2022-11-23 15:28:35,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 15:28:35,999 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 58 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:28:35,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 5 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 15:28:36,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2022-11-23 15:28:36,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 899. [2022-11-23 15:28:36,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 498 states have (on average 4.662650602409639) internal successors, (2322), 898 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:36,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2322 transitions. [2022-11-23 15:28:36,030 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2322 transitions. Word has length 4 [2022-11-23 15:28:36,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:28:36,030 INFO L495 AbstractCegarLoop]: Abstraction has 899 states and 2322 transitions. [2022-11-23 15:28:36,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:36,030 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2322 transitions. [2022-11-23 15:28:36,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 15:28:36,031 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:28:36,031 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 15:28:36,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:28:36,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:28:36,243 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-23 15:28:36,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:28:36,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1502632702, now seen corresponding path program 1 times [2022-11-23 15:28:36,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:28:36,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1103712715] [2022-11-23 15:28:36,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:36,244 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 15:28:36,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:28:36,246 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:28:36,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 (9)] Waiting until timeout for monitored process [2022-11-23 15:28:36,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:36,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-23 15:28:36,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:28:36,389 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 15:28:36,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:28:36,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:28:36,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:28:36,804 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:28:36,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1103712715] [2022-11-23 15:28:36,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1103712715] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:28:36,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1940866250] [2022-11-23 15:28:36,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:36,804 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 15:28:36,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 15:28:36,808 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 15:28:36,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-23 15:28:36,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:36,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 15:28:36,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:28:37,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:28:37,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:28:37,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1940866250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:28:37,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-23 15:28:37,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3] total 10 [2022-11-23 15:28:37,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573564948] [2022-11-23 15:28:37,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:28:37,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:28:37,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:28:37,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:28:37,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:28:37,117 INFO L87 Difference]: Start difference. First operand 899 states and 2322 transitions. Second operand has 5 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:38,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:28:38,241 INFO L93 Difference]: Finished difference Result 1789 states and 4628 transitions. [2022-11-23 15:28:38,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:28:38,242 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-23 15:28:38,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:28:38,253 INFO L225 Difference]: With dead ends: 1789 [2022-11-23 15:28:38,253 INFO L226 Difference]: Without dead ends: 1789 [2022-11-23 15:28:38,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-23 15:28:38,255 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 52 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:28:38,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 12 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-23 15:28:38,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1789 states. [2022-11-23 15:28:38,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1789 to 905. [2022-11-23 15:28:38,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 504 states have (on average 4.630952380952381) internal successors, (2334), 904 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:38,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 2334 transitions. [2022-11-23 15:28:38,306 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 2334 transitions. Word has length 5 [2022-11-23 15:28:38,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:28:38,306 INFO L495 AbstractCegarLoop]: Abstraction has 905 states and 2334 transitions. [2022-11-23 15:28:38,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:38,306 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 2334 transitions. [2022-11-23 15:28:38,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 15:28:38,307 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:28:38,307 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 15:28:38,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-23 15:28:38,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 (9)] Forceful destruction successful, exit code 0 [2022-11-23 15:28:38,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:28:38,711 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-23 15:28:38,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:28:38,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1502636441, now seen corresponding path program 1 times [2022-11-23 15:28:38,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:28:38,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [886628791] [2022-11-23 15:28:38,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:38,712 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 15:28:38,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:28:38,714 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:28:38,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:28:38,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:38,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 15:28:38,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:28:38,871 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 8 treesize of output 7 [2022-11-23 15:28:38,908 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 15:28:38,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:28:38,908 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:28:38,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [886628791] [2022-11-23 15:28:38,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [886628791] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:28:38,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:28:38,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:28:38,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505943392] [2022-11-23 15:28:38,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:28:38,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:28:38,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:28:38,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:28:38,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:28:38,910 INFO L87 Difference]: Start difference. First operand 905 states and 2334 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:39,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:28:39,915 INFO L93 Difference]: Finished difference Result 1787 states and 4627 transitions. [2022-11-23 15:28:39,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:28:39,916 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-23 15:28:39,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:28:39,926 INFO L225 Difference]: With dead ends: 1787 [2022-11-23 15:28:39,926 INFO L226 Difference]: Without dead ends: 1787 [2022-11-23 15:28:39,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:28:39,927 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 150 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:28:39,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 4 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 15:28:39,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2022-11-23 15:28:39,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 906. [2022-11-23 15:28:39,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 505 states have (on average 4.629702970297029) internal successors, (2338), 905 states have internal predecessors, (2338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:39,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 2338 transitions. [2022-11-23 15:28:39,962 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 2338 transitions. Word has length 5 [2022-11-23 15:28:39,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:28:39,963 INFO L495 AbstractCegarLoop]: Abstraction has 906 states and 2338 transitions. [2022-11-23 15:28:39,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:39,963 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 2338 transitions. [2022-11-23 15:28:39,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 15:28:39,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:28:39,964 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 15:28:39,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:28:40,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:28:40,176 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-23 15:28:40,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:28:40,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1502636653, now seen corresponding path program 1 times [2022-11-23 15:28:40,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:28:40,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [286922056] [2022-11-23 15:28:40,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:40,177 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 15:28:40,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:28:40,177 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:28:40,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:28:40,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:40,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 15:28:40,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:28:40,331 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 15:28:40,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:28:40,332 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:28:40,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [286922056] [2022-11-23 15:28:40,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [286922056] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:28:40,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:28:40,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:28:40,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858881067] [2022-11-23 15:28:40,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:28:40,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:28:40,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:28:40,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:28:40,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:28:40,333 INFO L87 Difference]: Start difference. First operand 906 states and 2338 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:40,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:28:40,871 INFO L93 Difference]: Finished difference Result 900 states and 2325 transitions. [2022-11-23 15:28:40,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:28:40,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-23 15:28:40,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:28:40,877 INFO L225 Difference]: With dead ends: 900 [2022-11-23 15:28:40,877 INFO L226 Difference]: Without dead ends: 900 [2022-11-23 15:28:40,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:28:40,878 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:28:40,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:28:40,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2022-11-23 15:28:40,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 900. [2022-11-23 15:28:40,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 499 states have (on average 4.659318637274549) internal successors, (2325), 899 states have internal predecessors, (2325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:40,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2325 transitions. [2022-11-23 15:28:40,904 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2325 transitions. Word has length 5 [2022-11-23 15:28:40,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:28:40,904 INFO L495 AbstractCegarLoop]: Abstraction has 900 states and 2325 transitions. [2022-11-23 15:28:40,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:40,905 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2325 transitions. [2022-11-23 15:28:40,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 15:28:40,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:28:40,905 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 15:28:40,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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)] Ended with exit code 0 [2022-11-23 15:28:41,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:28:41,117 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-23 15:28:41,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:28:41,117 INFO L85 PathProgramCache]: Analyzing trace with hash -766534854, now seen corresponding path program 1 times [2022-11-23 15:28:41,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:28:41,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [953755751] [2022-11-23 15:28:41,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:41,118 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 15:28:41,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:28:41,119 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:28:41,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 (13)] Waiting until timeout for monitored process [2022-11-23 15:28:41,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:41,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-23 15:28:41,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:28:41,277 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 15:28:41,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:28:41,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:28:41,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:28:41,664 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:28:41,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [953755751] [2022-11-23 15:28:41,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [953755751] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:28:41,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1771992547] [2022-11-23 15:28:41,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:41,665 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 15:28:41,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 15:28:41,666 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 15:28:41,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-23 15:28:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:41,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 15:28:41,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:28:42,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:28:42,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:28:42,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:28:42,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1771992547] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:28:42,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586743113] [2022-11-23 15:28:42,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:28:42,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:28:42,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:28:42,377 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:28:42,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 15:28:42,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:28:42,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 15:28:42,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:28:42,506 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 5 [2022-11-23 15:28:42,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:28:42,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:28:42,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 15:28:42,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586743113] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:28:42,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 15:28:42,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 5, 5, 3, 3] total 19 [2022-11-23 15:28:42,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970866472] [2022-11-23 15:28:42,890 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 15:28:42,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 15:28:42,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:28:42,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 15:28:42,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-11-23 15:28:42,891 INFO L87 Difference]: Start difference. First operand 900 states and 2325 transitions. Second operand has 20 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:46,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:28:48,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:28:53,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:28:53,701 INFO L93 Difference]: Finished difference Result 7087 states and 18400 transitions. [2022-11-23 15:28:53,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-23 15:28:53,702 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-23 15:28:53,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:28:53,764 INFO L225 Difference]: With dead ends: 7087 [2022-11-23 15:28:53,765 INFO L226 Difference]: Without dead ends: 7087 [2022-11-23 15:28:53,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=415, Invalid=1477, Unknown=0, NotChecked=0, Total=1892 [2022-11-23 15:28:53,766 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1948 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1071 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1948 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:28:53,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1948 Valid, 42 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1071 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2022-11-23 15:28:53,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7087 states. [2022-11-23 15:28:53,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7087 to 913. [2022-11-23 15:28:53,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 512 states have (on average 4.6015625) internal successors, (2356), 912 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:53,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 2356 transitions. [2022-11-23 15:28:53,867 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 2356 transitions. Word has length 6 [2022-11-23 15:28:53,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:28:53,868 INFO L495 AbstractCegarLoop]: Abstraction has 913 states and 2356 transitions. [2022-11-23 15:28:53,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:28:53,868 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 2356 transitions. [2022-11-23 15:28:53,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 15:28:53,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:28:53,869 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-23 15:28:53,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 (13)] Forceful destruction successful, exit code 0 [2022-11-23 15:28:54,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-11-23 15:28:54,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 15:28:54,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:28:54,478 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-23 15:28:54,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:28:54,479 INFO L85 PathProgramCache]: Analyzing trace with hash -769985386, now seen corresponding path program 2 times [2022-11-23 15:28:54,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:28:54,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [77145163] [2022-11-23 15:28:54,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 15:28:54,479 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 15:28:54,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:28:54,480 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:28:54,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 (16)] Waiting until timeout for monitored process [2022-11-23 15:28:54,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 15:28:54,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:28:54,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 15:28:54,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:28:54,662 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 15:28:54,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 15:28:54,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:28:54,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:28:55,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:28:55,562 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:28:55,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [77145163] [2022-11-23 15:28:55,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [77145163] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:28:55,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [806319833] [2022-11-23 15:28:55,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 15:28:55,563 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 15:28:55,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 15:28:55,564 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 15:28:55,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-23 15:28:55,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 15:28:55,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:28:55,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 15:28:55,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:28:55,830 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 15:28:55,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 15:28:55,960 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:28:55,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:28:56,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:28:56,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [806319833] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:28:56,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27556011] [2022-11-23 15:28:56,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 15:28:56,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:28:56,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:28:56,944 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:28:56,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-23 15:28:57,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 15:28:57,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 15:28:57,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 15:28:57,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:28:57,157 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 15:28:57,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 15:28:57,243 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:28:57,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:28:57,418 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:28:57,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27556011] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:28:57,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 15:28:57,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-11-23 15:28:57,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898419641] [2022-11-23 15:28:57,419 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 15:28:57,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 15:28:57,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:28:57,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 15:28:57,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-23 15:28:57,423 INFO L87 Difference]: Start difference. First operand 913 states and 2356 transitions. Second operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:29:01,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:29:04,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:29:05,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:29:06,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:29:09,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:29:10,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:29:11,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:29:15,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 15:29:17,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:29:17,881 INFO L93 Difference]: Finished difference Result 939 states and 2405 transitions. [2022-11-23 15:29:17,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 15:29:17,883 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-23 15:29:17,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:29:17,886 INFO L225 Difference]: With dead ends: 939 [2022-11-23 15:29:17,886 INFO L226 Difference]: Without dead ends: 939 [2022-11-23 15:29:17,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2022-11-23 15:29:17,887 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 16 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:29:17,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 18 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 19.1s Time] [2022-11-23 15:29:17,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2022-11-23 15:29:17,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 931. [2022-11-23 15:29:17,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 530 states have (on average 4.513207547169811) internal successors, (2392), 930 states have internal predecessors, (2392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:29:17,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 2392 transitions. [2022-11-23 15:29:17,922 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 2392 transitions. Word has length 6 [2022-11-23 15:29:17,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:29:17,923 INFO L495 AbstractCegarLoop]: Abstraction has 931 states and 2392 transitions. [2022-11-23 15:29:17,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:29:17,923 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 2392 transitions. [2022-11-23 15:29:17,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 15:29:17,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:29:17,924 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:29:17,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-11-23 15:29:18,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 (16)] Forceful destruction successful, exit code 0 [2022-11-23 15:29:18,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-23 15:29:18,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:29:18,528 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-23 15:29:18,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:29:18,529 INFO L85 PathProgramCache]: Analyzing trace with hash 2007238774, now seen corresponding path program 1 times [2022-11-23 15:29:18,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:29:18,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2105323490] [2022-11-23 15:29:18,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:29:18,529 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 15:29:18,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:29:18,531 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:29:18,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 (19)] Waiting until timeout for monitored process [2022-11-23 15:29:18,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:29:18,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 15:29:18,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:29:18,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:29:18,733 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:29:18,733 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:29:18,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2105323490] [2022-11-23 15:29:18,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2105323490] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:29:18,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:29:18,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:29:18,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994055347] [2022-11-23 15:29:18,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:29:18,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:29:18,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:29:18,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:29:18,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:29:18,735 INFO L87 Difference]: Start difference. First operand 931 states and 2392 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:29:19,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:29:19,246 INFO L93 Difference]: Finished difference Result 931 states and 2390 transitions. [2022-11-23 15:29:19,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:29:19,246 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 15:29:19,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:29:19,250 INFO L225 Difference]: With dead ends: 931 [2022-11-23 15:29:19,250 INFO L226 Difference]: Without dead ends: 931 [2022-11-23 15:29:19,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 15:29:19,251 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:29:19,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 6 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:29:19,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-11-23 15:29:19,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 931. [2022-11-23 15:29:19,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 530 states have (on average 4.509433962264151) internal successors, (2390), 930 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:29:19,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 2390 transitions. [2022-11-23 15:29:19,302 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 2390 transitions. Word has length 7 [2022-11-23 15:29:19,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:29:19,303 INFO L495 AbstractCegarLoop]: Abstraction has 931 states and 2390 transitions. [2022-11-23 15:29:19,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:29:19,303 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 2390 transitions. [2022-11-23 15:29:19,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 15:29:19,303 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:29:19,303 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:29:19,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 (19)] Forceful destruction successful, exit code 0 [2022-11-23 15:29:19,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:29:19,511 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-23 15:29:19,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:29:19,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1958190897, now seen corresponding path program 1 times [2022-11-23 15:29:19,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:29:19,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2146774256] [2022-11-23 15:29:19,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:29:19,513 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 15:29:19,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:29:19,513 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:29:19,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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)] Waiting until timeout for monitored process [2022-11-23 15:29:19,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:29:19,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 15:29:19,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:29:19,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:29:19,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:29:19,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:29:19,978 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:29:19,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2146774256] [2022-11-23 15:29:19,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2146774256] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:29:19,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [995478047] [2022-11-23 15:29:19,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:29:19,978 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 15:29:19,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 15:29:19,979 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 15:29:19,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-23 15:29:20,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:29:20,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 15:29:20,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:29:20,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:29:20,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:29:20,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:29:20,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [995478047] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:29:20,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299590365] [2022-11-23 15:29:20,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:29:20,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:29:20,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:29:20,444 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:29:20,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-23 15:29:20,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:29:20,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 15:29:20,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:29:20,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:29:20,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:29:20,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 15:29:20,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299590365] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:29:20,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 15:29:20,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 16 [2022-11-23 15:29:20,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446432442] [2022-11-23 15:29:20,840 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 15:29:20,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 15:29:20,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:29:20,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 15:29:20,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2022-11-23 15:29:20,841 INFO L87 Difference]: Start difference. First operand 931 states and 2390 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:29:22,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:29:22,799 INFO L93 Difference]: Finished difference Result 1826 states and 4707 transitions. [2022-11-23 15:29:22,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 15:29:22,799 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 15:29:22,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:29:22,806 INFO L225 Difference]: With dead ends: 1826 [2022-11-23 15:29:22,806 INFO L226 Difference]: Without dead ends: 1826 [2022-11-23 15:29:22,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2022-11-23 15:29:22,807 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 223 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:29:22,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 24 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-23 15:29:22,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1826 states. [2022-11-23 15:29:22,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1826 to 931. [2022-11-23 15:29:22,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 530 states have (on average 4.503773584905661) internal successors, (2387), 930 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:29:22,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 2387 transitions. [2022-11-23 15:29:22,837 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 2387 transitions. Word has length 8 [2022-11-23 15:29:22,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:29:22,837 INFO L495 AbstractCegarLoop]: Abstraction has 931 states and 2387 transitions. [2022-11-23 15:29:22,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:29:22,837 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 2387 transitions. [2022-11-23 15:29:22,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 15:29:22,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:29:22,838 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:29:22,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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)] Forceful destruction successful, exit code 0 [2022-11-23 15:29:23,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2022-11-23 15:29:23,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-23 15:29:23,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:29:23,450 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-23 15:29:23,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:29:23,451 INFO L85 PathProgramCache]: Analyzing trace with hash 574376410, now seen corresponding path program 1 times [2022-11-23 15:29:23,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:29:23,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [838274158] [2022-11-23 15:29:23,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:29:23,451 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 15:29:23,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:29:23,452 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:29:23,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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)] Waiting until timeout for monitored process [2022-11-23 15:29:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:29:23,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 15:29:23,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:29:23,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:29:23,736 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 15:29:23,737 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 3 case distinctions, treesize of input 22 treesize of output 33 [2022-11-23 15:29:23,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:29:23,803 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 15:29:23,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:29:23,849 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 15:29:23,937 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:29:23,938 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 15:29:23,968 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 15:29:23,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:29:23,969 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:29:23,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [838274158] [2022-11-23 15:29:23,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [838274158] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:29:23,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:29:23,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:29:23,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517017562] [2022-11-23 15:29:23,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:29:23,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:29:23,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:29:23,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:29:23,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:29:23,970 INFO L87 Difference]: Start difference. First operand 931 states and 2387 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:29:24,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:29:24,483 INFO L93 Difference]: Finished difference Result 740 states and 1822 transitions. [2022-11-23 15:29:24,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:29:24,484 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 15:29:24,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:29:24,486 INFO L225 Difference]: With dead ends: 740 [2022-11-23 15:29:24,487 INFO L226 Difference]: Without dead ends: 740 [2022-11-23 15:29:24,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:29:24,488 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 100 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:29:24,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 2 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:29:24,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-11-23 15:29:24,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 740. [2022-11-23 15:29:24,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 457 states have (on average 3.9868708971553612) internal successors, (1822), 739 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:29:24,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1822 transitions. [2022-11-23 15:29:24,504 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1822 transitions. Word has length 9 [2022-11-23 15:29:24,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:29:24,505 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 1822 transitions. [2022-11-23 15:29:24,505 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:29:24,505 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1822 transitions. [2022-11-23 15:29:24,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 15:29:24,505 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:29:24,506 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:29:24,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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)] Forceful destruction successful, exit code 0 [2022-11-23 15:29:24,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:29:24,718 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-23 15:29:24,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:29:24,719 INFO L85 PathProgramCache]: Analyzing trace with hash 574376412, now seen corresponding path program 1 times [2022-11-23 15:29:24,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:29:24,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [372624864] [2022-11-23 15:29:24,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:29:24,719 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 15:29:24,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:29:24,720 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:29:24,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 (24)] Waiting until timeout for monitored process [2022-11-23 15:29:24,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:29:24,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 15:29:24,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:29:24,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:29:24,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:29:25,003 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 15:29:25,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-23 15:29:25,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-23 15:29:25,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:29:25,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 15:29:25,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:29:25,120 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 15:29:25,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:29:25,161 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 15:29:25,214 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 15:29:25,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:29:25,215 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:29:25,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [372624864] [2022-11-23 15:29:25,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [372624864] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:29:25,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:29:25,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:29:25,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318528345] [2022-11-23 15:29:25,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:29:25,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:29:25,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:29:25,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:29:25,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:29:25,216 INFO L87 Difference]: Start difference. First operand 740 states and 1822 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:29:25,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:29:25,722 INFO L93 Difference]: Finished difference Result 549 states and 1257 transitions. [2022-11-23 15:29:25,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:29:25,722 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 15:29:25,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:29:25,725 INFO L225 Difference]: With dead ends: 549 [2022-11-23 15:29:25,725 INFO L226 Difference]: Without dead ends: 549 [2022-11-23 15:29:25,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:29:25,726 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 96 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:29:25,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 2 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:29:25,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-11-23 15:29:25,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 549. [2022-11-23 15:29:25,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 384 states have (on average 3.2734375) internal successors, (1257), 548 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:29:25,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1257 transitions. [2022-11-23 15:29:25,738 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1257 transitions. Word has length 9 [2022-11-23 15:29:25,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:29:25,738 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 1257 transitions. [2022-11-23 15:29:25,738 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:29:25,739 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1257 transitions. [2022-11-23 15:29:25,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 15:29:25,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:29:25,739 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:29:25,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 (24)] Forceful destruction successful, exit code 0 [2022-11-23 15:29:25,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:29:25,952 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-23 15:29:25,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:29:25,952 INFO L85 PathProgramCache]: Analyzing trace with hash -2075015900, now seen corresponding path program 1 times [2022-11-23 15:29:25,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:29:25,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183641509] [2022-11-23 15:29:25,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:29:25,952 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 15:29:25,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:29:25,953 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:29:25,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:29:26,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:29:26,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-23 15:29:26,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:29:26,249 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 8 treesize of output 7 [2022-11-23 15:29:26,272 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 15:29:26,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:29:26,418 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 16 treesize of output 18 [2022-11-23 15:29:26,455 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:29:26,456 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 15:29:26,632 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 15:29:26,632 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 16 treesize of output 22 [2022-11-23 15:29:26,694 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-23 15:29:26,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-23 15:29:26,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:29:26,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:29:32,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:29:32,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 15:29:32,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:29:32,213 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:29:32,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183641509] [2022-11-23 15:29:32,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183641509] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:29:32,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1976733829] [2022-11-23 15:29:32,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:29:32,214 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 15:29:32,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 15:29:32,219 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 15:29:32,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-23 15:29:32,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:29:32,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 15:29:32,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:29:32,650 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 15:29:32,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 15:29:32,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:29:32,907 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 16 treesize of output 18 [2022-11-23 15:29:32,957 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:29:32,958 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 15:29:33,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:29:33,093 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 16 treesize of output 18 [2022-11-23 15:29:33,140 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-23 15:29:33,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-23 15:29:33,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:29:33,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:29:38,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:29:38,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1976733829] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:29:38,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242053608] [2022-11-23 15:29:38,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:29:38,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:29:38,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:29:38,244 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:29:38,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-23 15:29:38,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:29:38,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-23 15:29:38,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:29:38,437 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 15:29:38,463 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 8 treesize of output 7 [2022-11-23 15:29:38,559 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:29:38,559 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 15:29:38,571 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 16 treesize of output 18 [2022-11-23 15:29:38,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:29:38,756 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 16 treesize of output 18 [2022-11-23 15:29:38,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:29:38,773 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 9 [2022-11-23 15:29:39,309 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 15:29:39,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:29:51,398 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 15:29:51,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242053608] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:29:51,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 15:29:51,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 7, 7] total 23 [2022-11-23 15:29:51,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438182972] [2022-11-23 15:29:51,399 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 15:29:51,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-23 15:29:51,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:29:51,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-23 15:29:51,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=434, Unknown=6, NotChecked=0, Total=552 [2022-11-23 15:29:51,402 INFO L87 Difference]: Start difference. First operand 549 states and 1257 transitions. Second operand has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:30:13,132 WARN L233 SmtUtils]: Spent 21.32s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:30:15,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:31:36,902 WARN L233 SmtUtils]: Spent 1.30m on a formula simplification. DAG size of input: 94 DAG size of output: 94 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:31:39,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:31:41,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:32:13,163 WARN L233 SmtUtils]: Spent 26.54s on a formula simplification that was a NOOP. DAG size: 89 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:32:15,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:32:17,566 WARN L539 Checker$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 15:32:19,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:33:41,825 WARN L233 SmtUtils]: Spent 1.29m on a formula simplification. DAG size of input: 93 DAG size of output: 93 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:33:44,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:33:49,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:33:51,477 WARN L539 Checker$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 15:33:53,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:34:02,905 WARN L233 SmtUtils]: Spent 7.06s on a formula simplification that was a NOOP. DAG size: 90 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:34:28,613 WARN L233 SmtUtils]: Spent 24.51s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:35:09,575 WARN L233 SmtUtils]: Spent 39.47s on a formula simplification. DAG size of input: 93 DAG size of output: 91 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:35:11,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:36:34,531 WARN L233 SmtUtils]: Spent 1.36m on a formula simplification. DAG size of input: 95 DAG size of output: 93 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:37:05,290 WARN L233 SmtUtils]: Spent 26.36s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:37:07,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:37:09,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:37:11,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 15:37:42,460 WARN L233 SmtUtils]: Spent 28.52s on a formula simplification that was a NOOP. DAG size: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:37:58,028 WARN L233 SmtUtils]: Spent 13.07s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:38:23,119 WARN L233 SmtUtils]: Spent 24.62s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:38:26,949 WARN L539 Checker$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 15:39:40,241 WARN L233 SmtUtils]: Spent 49.90s on a formula simplification. DAG size of input: 92 DAG size of output: 90 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:40:12,917 WARN L233 SmtUtils]: Spent 26.20s on a formula simplification that was a NOOP. DAG size: 86 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:41:04,288 WARN L233 SmtUtils]: Spent 50.47s on a formula simplification. DAG size of input: 93 DAG size of output: 91 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 15:41:12,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:41:12,851 INFO L93 Difference]: Finished difference Result 2342 states and 5213 transitions. [2022-11-23 15:41:12,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-23 15:41:12,854 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 15:41:12,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:41:12,861 INFO L225 Difference]: With dead ends: 2342 [2022-11-23 15:41:12,861 INFO L226 Difference]: Without dead ends: 2342 [2022-11-23 15:41:12,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 648.8s TimeCoverageRelationStatistics Valid=479, Invalid=1756, Unknown=21, NotChecked=0, Total=2256 [2022-11-23 15:41:12,866 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 913 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 109 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 913 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.7s IncrementalHoareTripleChecker+Time [2022-11-23 15:41:12,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [913 Valid, 0 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1055 Invalid, 13 Unknown, 0 Unchecked, 54.7s Time] [2022-11-23 15:41:12,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2022-11-23 15:41:12,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 541. [2022-11-23 15:41:12,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 398 states have (on average 3.040201005025126) internal successors, (1210), 540 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:41:12,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 1210 transitions. [2022-11-23 15:41:12,904 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 1210 transitions. Word has length 11 [2022-11-23 15:41:12,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:41:12,904 INFO L495 AbstractCegarLoop]: Abstraction has 541 states and 1210 transitions. [2022-11-23 15:41:12,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:41:12,905 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 1210 transitions. [2022-11-23 15:41:12,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 15:41:12,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:41:12,912 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:41:12,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-23 15:41:13,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-11-23 15:41:13,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:41:13,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:41:13,522 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-23 15:41:13,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:41:13,523 INFO L85 PathProgramCache]: Analyzing trace with hash -2075015835, now seen corresponding path program 1 times [2022-11-23 15:41:13,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:41:13,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1454950064] [2022-11-23 15:41:13,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:41:13,523 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 15:41:13,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:41:13,524 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:41:13,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:41:13,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:41:13,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 15:41:13,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:41:13,934 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-23 15:41:13,935 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 2 case distinctions, treesize of input 26 treesize of output 33 [2022-11-23 15:41:14,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:41:14,006 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 15:41:14,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:41:14,086 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 15:41:14,182 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:41:14,183 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 15:41:14,284 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 15:41:14,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:41:14,284 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:41:14,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1454950064] [2022-11-23 15:41:14,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1454950064] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:41:14,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:41:14,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:41:14,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21049308] [2022-11-23 15:41:14,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:41:14,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:41:14,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:41:14,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:41:14,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:41:14,287 INFO L87 Difference]: Start difference. First operand 541 states and 1210 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:41:14,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:41:14,886 INFO L93 Difference]: Finished difference Result 513 states and 1151 transitions. [2022-11-23 15:41:14,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:41:14,887 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 15:41:14,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:41:14,888 INFO L225 Difference]: With dead ends: 513 [2022-11-23 15:41:14,888 INFO L226 Difference]: Without dead ends: 513 [2022-11-23 15:41:14,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:41:14,889 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 47 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:41:14,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 2 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 15:41:14,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-11-23 15:41:14,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 513. [2022-11-23 15:41:14,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 390 states have (on average 2.9512820512820515) internal successors, (1151), 512 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:41:14,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 1151 transitions. [2022-11-23 15:41:14,903 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 1151 transitions. Word has length 11 [2022-11-23 15:41:14,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:41:14,904 INFO L495 AbstractCegarLoop]: Abstraction has 513 states and 1151 transitions. [2022-11-23 15:41:14,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:41:14,904 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 1151 transitions. [2022-11-23 15:41:14,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 15:41:14,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:41:14,905 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:41:14,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:41:15,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:41:15,119 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-23 15:41:15,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:41:15,119 INFO L85 PathProgramCache]: Analyzing trace with hash -2075015834, now seen corresponding path program 1 times [2022-11-23 15:41:15,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:41:15,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [193898285] [2022-11-23 15:41:15,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:41:15,120 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 15:41:15,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:41:15,121 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:41:15,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:41:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:41:15,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 15:41:15,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:41:15,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:41:15,535 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-23 15:41:15,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-23 15:41:15,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:41:15,560 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 18 treesize of output 16 [2022-11-23 15:41:15,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:41:15,650 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 15:41:15,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:41:15,712 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 15:41:15,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:41:15,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 15:41:15,877 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 15:41:15,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:41:15,878 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:41:15,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [193898285] [2022-11-23 15:41:15,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [193898285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:41:15,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:41:15,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:41:15,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990192617] [2022-11-23 15:41:15,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:41:15,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:41:15,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:41:15,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:41:15,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:41:15,880 INFO L87 Difference]: Start difference. First operand 513 states and 1151 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:41:16,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:41:16,435 INFO L93 Difference]: Finished difference Result 485 states and 1092 transitions. [2022-11-23 15:41:16,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:41:16,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 15:41:16,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:41:16,437 INFO L225 Difference]: With dead ends: 485 [2022-11-23 15:41:16,437 INFO L226 Difference]: Without dead ends: 485 [2022-11-23 15:41:16,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:41:16,438 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 82 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 15:41:16,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 2 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 15:41:16,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-11-23 15:41:16,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 485. [2022-11-23 15:41:16,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 382 states have (on average 2.858638743455497) internal successors, (1092), 484 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:41:16,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1092 transitions. [2022-11-23 15:41:16,452 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1092 transitions. Word has length 11 [2022-11-23 15:41:16,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:41:16,453 INFO L495 AbstractCegarLoop]: Abstraction has 485 states and 1092 transitions. [2022-11-23 15:41:16,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:41:16,453 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1092 transitions. [2022-11-23 15:41:16,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 15:41:16,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:41:16,454 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:41:16,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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)] Ended with exit code 0 [2022-11-23 15:41:16,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:41:16,670 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-23 15:41:16,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:41:16,671 INFO L85 PathProgramCache]: Analyzing trace with hash -2075016327, now seen corresponding path program 1 times [2022-11-23 15:41:16,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:41:16,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523167657] [2022-11-23 15:41:16,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:41:16,671 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 15:41:16,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:41:16,672 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:41:16,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:41:16,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:41:16,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 15:41:16,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:41:17,032 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 15:41:17,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 15:41:17,098 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:41:17,098 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 15:41:17,190 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:41:17,190 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 15:41:17,242 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 15:41:17,242 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 15:41:17,310 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 15:41:17,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 15:41:17,310 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:41:17,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523167657] [2022-11-23 15:41:17,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523167657] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:41:17,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:41:17,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:41:17,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444196881] [2022-11-23 15:41:17,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:41:17,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:41:17,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 15:41:17,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:41:17,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:41:17,312 INFO L87 Difference]: Start difference. First operand 485 states and 1092 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:41:17,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:41:17,888 INFO L93 Difference]: Finished difference Result 405 states and 888 transitions. [2022-11-23 15:41:17,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:41:17,889 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 15:41:17,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:41:17,891 INFO L225 Difference]: With dead ends: 405 [2022-11-23 15:41:17,891 INFO L226 Difference]: Without dead ends: 405 [2022-11-23 15:41:17,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:41:17,892 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 150 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 15:41:17,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 1 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 15:41:17,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-11-23 15:41:17,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 405. [2022-11-23 15:41:17,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 329 states have (on average 2.6990881458966567) internal successors, (888), 404 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:41:17,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 888 transitions. [2022-11-23 15:41:17,905 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 888 transitions. Word has length 11 [2022-11-23 15:41:17,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:41:17,905 INFO L495 AbstractCegarLoop]: Abstraction has 405 states and 888 transitions. [2022-11-23 15:41:17,905 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:41:17,906 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 888 transitions. [2022-11-23 15:41:17,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 15:41:17,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:41:17,906 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:41:17,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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)] Forceful destruction successful, exit code 0 [2022-11-23 15:41:18,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:41:18,121 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 65 more)] === [2022-11-23 15:41:18,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:41:18,122 INFO L85 PathProgramCache]: Analyzing trace with hash -2075016326, now seen corresponding path program 1 times [2022-11-23 15:41:18,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 15:41:18,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [225080654] [2022-11-23 15:41:18,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:41:18,123 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 15:41:18,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 15:41:18,124 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 15:41:18,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/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 (31)] Waiting until timeout for monitored process [2022-11-23 15:41:18,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:41:18,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-23 15:41:18,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:41:18,629 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 15:41:18,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 15:41:18,755 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 15:41:18,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 15:41:18,998 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 15:41:19,000 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 16 treesize of output 22 [2022-11-23 15:41:19,069 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:41:19,069 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 15:41:19,403 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-23 15:41:19,403 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 15:41:19,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 15:41:19,700 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-23 15:41:19,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-23 15:41:19,714 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 16 treesize of output 18 [2022-11-23 15:41:20,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:41:20,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:41:26,660 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvmul c_~id_0~0 (_ bv4 32)))) (let ((.cse1 (bvadd (_ bv4 32) c_~get_2~0.offset .cse0))) (and (or (forall ((|v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_115| (_ BitVec 32)) (|v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_116| (_ BitVec 32)) (v_ArrVal_786 (_ BitVec 1))) (or (not (= (_ bv0 1) (select (store |c_#valid| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_116| v_ArrVal_786) |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_115|))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_116|))))) (bvule (bvadd c_~get_2~0.offset .cse0) .cse1)) (forall ((|v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_116| (_ BitVec 32))) (or (forall ((|v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_115| (_ BitVec 32)) (v_ArrVal_786 (_ BitVec 1)) (v_ArrVal_785 (_ BitVec 32))) (or (not (= (_ bv0 1) (select (store |c_#valid| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_116| v_ArrVal_786) |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_115|))) (forall ((v_ArrVal_787 (_ BitVec 32))) (bvule .cse1 (select (store (store |c_#length| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_116| v_ArrVal_785) |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_115| v_ArrVal_787) c_~get_2~0.base))))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_116|)))))))) is different from false [2022-11-23 15:41:31,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:41:31,795 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 15:41:31,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [225080654] [2022-11-23 15:41:31,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [225080654] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:41:31,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [112934766] [2022-11-23 15:41:31,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:41:31,796 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 15:41:31,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 15:41:31,797 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 15:41:31,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-23 15:41:32,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:41:32,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 15:41:32,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:41:32,410 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 15:41:32,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 15:41:32,549 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 15:41:32,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 15:41:32,951 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:41:32,951 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 15:41:32,965 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 16 treesize of output 18 [2022-11-23 15:41:33,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:41:33,170 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 16 treesize of output 18 [2022-11-23 15:41:33,210 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:41:33,210 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 15:41:33,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:41:33,393 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 16 treesize of output 18 [2022-11-23 15:41:33,442 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-23 15:41:33,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-23 15:41:33,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:41:33,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 15:41:46,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 15:41:46,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [112934766] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 15:41:46,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224736388] [2022-11-23 15:41:46,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:41:46,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 15:41:46,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:41:46,715 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 15:41:46,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3828d898-1838-45be-8385-04a4c94342af/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-23 15:41:46,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:41:46,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-23 15:41:46,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 15:41:46,998 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 15:41:46,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 15:41:47,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:41:47,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 15:41:47,314 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:41:47,314 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 15:41:47,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:41:47,801 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 16 treesize of output 18 [2022-11-23 15:41:47,841 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 15:41:47,842 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 15:41:48,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:41:48,406 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 16 treesize of output 18 [2022-11-23 15:41:48,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 15:41:48,432 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 9 [2022-11-23 15:41:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:41:49,252 INFO L328 TraceCheckSpWp]: Computing backward predicates...