./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/array-eq-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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/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_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/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_286110f6-77d7-4dde-bdfe-6a520a3586ee/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 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 14:34:49,035 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:34:49,038 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:34:49,078 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:34:49,078 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:34:49,082 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:34:49,084 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:34:49,087 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:34:49,089 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:34:49,095 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:34:49,096 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:34:49,099 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:34:49,099 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:34:49,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:34:49,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:34:49,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:34:49,107 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:34:49,107 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:34:49,109 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:34:49,115 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:34:49,117 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:34:49,119 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:34:49,121 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:34:49,121 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:34:49,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:34:49,132 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:34:49,132 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:34:49,134 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:34:49,135 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:34:49,136 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:34:49,136 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:34:49,138 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:34:49,140 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:34:49,142 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:34:49,143 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:34:49,143 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:34:49,144 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:34:49,144 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:34:49,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:34:49,146 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:34:49,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:34:49,148 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-23 14:34:49,186 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:34:49,186 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:34:49,187 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:34:49,187 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:34:49,188 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:34:49,188 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:34:49,189 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:34:49,189 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:34:49,189 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:34:49,189 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:34:49,190 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:34:49,191 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:34:49,191 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:34:49,191 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:34:49,191 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:34:49,192 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:34:49,192 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:34:49,192 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:34:49,193 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 14:34:49,193 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 14:34:49,193 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:34:49,193 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:34:49,194 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 14:34:49,194 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:34:49,194 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:34:49,195 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:34:49,195 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 14:34:49,195 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 14:34:49,195 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 14:34:49,196 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:34:49,196 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 14:34:49,196 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:34:49,196 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:34:49,197 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:34:49,197 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:34:49,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:34:49,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:34:49,197 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:34:49,198 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:34:49,198 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:34:49,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:34:49,198 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:34:49,198 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_286110f6-77d7-4dde-bdfe-6a520a3586ee/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 [2022-11-23 14:34:49,532 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:34:49,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:34:49,566 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:34:49,568 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:34:49,568 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:34:49,570 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2022-11-23 14:34:52,619 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:34:52,845 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:34:52,845 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2022-11-23 14:34:52,852 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/data/c253ea540/1ef963eca01b4e88a18396ec464f3aed/FLAGed0612a15 [2022-11-23 14:34:52,874 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/data/c253ea540/1ef963eca01b4e88a18396ec464f3aed [2022-11-23 14:34:52,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:34:52,880 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:34:52,883 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:34:52,884 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:34:52,887 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:34:52,888 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:34:52" (1/1) ... [2022-11-23 14:34:52,890 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21ddd371 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:34:52, skipping insertion in model container [2022-11-23 14:34:52,890 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:34:52" (1/1) ... [2022-11-23 14:34:52,898 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:34:52,921 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:34:53,145 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_286110f6-77d7-4dde-bdfe-6a520a3586ee/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2022-11-23 14:34:53,171 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:34:53,183 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-23 14:34:53,184 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@66c0751e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:34:53, skipping insertion in model container [2022-11-23 14:34:53,184 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:34:53,185 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-23 14:34:53,187 INFO L158 Benchmark]: Toolchain (without parser) took 305.77ms. Allocated memory is still 144.7MB. Free memory was 101.1MB in the beginning and 91.4MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 14:34:53,188 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 107.0MB. Free memory is still 58.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 14:34:53,189 INFO L158 Benchmark]: CACSL2BoogieTranslator took 301.16ms. Allocated memory is still 144.7MB. Free memory was 101.1MB in the beginning and 91.4MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 14:34:53,191 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 107.0MB. Free memory is still 58.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 301.16ms. Allocated memory is still 144.7MB. Free memory was 101.1MB in the beginning and 91.4MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 94]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/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_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/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_286110f6-77d7-4dde-bdfe-6a520a3586ee/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 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 14:34:55,513 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:34:55,515 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:34:55,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:34:55,537 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:34:55,538 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:34:55,540 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:34:55,542 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:34:55,544 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:34:55,545 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:34:55,546 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:34:55,547 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:34:55,548 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:34:55,549 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:34:55,550 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:34:55,551 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:34:55,552 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:34:55,553 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:34:55,555 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:34:55,557 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:34:55,559 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:34:55,560 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:34:55,562 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:34:55,563 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:34:55,567 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:34:55,567 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:34:55,568 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:34:55,569 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:34:55,569 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:34:55,570 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:34:55,571 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:34:55,572 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:34:55,573 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:34:55,574 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:34:55,585 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:34:55,585 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:34:55,586 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:34:55,586 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:34:55,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:34:55,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:34:55,588 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:34:55,591 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-23 14:34:55,640 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:34:55,640 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:34:55,640 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:34:55,641 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:34:55,641 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:34:55,642 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:34:55,642 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:34:55,642 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:34:55,642 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:34:55,643 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:34:55,643 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:34:55,643 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:34:55,644 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 14:34:55,644 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 14:34:55,644 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:34:55,645 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:34:55,645 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 14:34:55,645 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:34:55,648 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:34:55,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:34:55,649 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 14:34:55,649 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 14:34:55,649 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 14:34:55,650 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:34:55,650 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 14:34:55,650 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-23 14:34:55,650 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-23 14:34:55,651 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:34:55,651 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:34:55,652 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:34:55,652 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 14:34:55,652 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:34:55,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:34:55,653 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:34:55,653 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:34:55,653 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-23 14:34:55,654 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-23 14:34:55,655 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:34:55,655 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 14:34:55,655 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_286110f6-77d7-4dde-bdfe-6a520a3586ee/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 [2022-11-23 14:34:56,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:34:56,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:34:56,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:34:56,089 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:34:56,090 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:34:56,091 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2022-11-23 14:34:59,282 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:34:59,512 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:34:59,513 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2022-11-23 14:34:59,527 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/data/6e24ad852/b0dfadc5c41948668023976ca106cc52/FLAG793e8313f [2022-11-23 14:34:59,546 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/data/6e24ad852/b0dfadc5c41948668023976ca106cc52 [2022-11-23 14:34:59,548 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:34:59,550 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:34:59,554 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:34:59,554 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:34:59,558 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:34:59,559 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:34:59" (1/1) ... [2022-11-23 14:34:59,560 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@176a54e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:34:59, skipping insertion in model container [2022-11-23 14:34:59,560 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:34:59" (1/1) ... [2022-11-23 14:34:59,568 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:34:59,596 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:34:59,850 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_286110f6-77d7-4dde-bdfe-6a520a3586ee/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2022-11-23 14:34:59,888 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:34:59,906 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-23 14:34:59,918 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:34:59,942 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_286110f6-77d7-4dde-bdfe-6a520a3586ee/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2022-11-23 14:34:59,945 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:34:59,950 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:34:59,988 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_286110f6-77d7-4dde-bdfe-6a520a3586ee/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2022-11-23 14:34:59,999 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:35:00,020 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:35:00,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:00 WrapperNode [2022-11-23 14:35:00,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:35:00,023 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:35:00,023 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:35:00,023 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:35:00,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:00" (1/1) ... [2022-11-23 14:35:00,054 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:00" (1/1) ... [2022-11-23 14:35:00,092 INFO L138 Inliner]: procedures = 25, calls = 29, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 108 [2022-11-23 14:35:00,092 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:35:00,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:35:00,093 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:35:00,095 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:35:00,104 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:00" (1/1) ... [2022-11-23 14:35:00,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:00" (1/1) ... [2022-11-23 14:35:00,108 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:00" (1/1) ... [2022-11-23 14:35:00,108 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:00" (1/1) ... [2022-11-23 14:35:00,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:00" (1/1) ... [2022-11-23 14:35:00,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:00" (1/1) ... [2022-11-23 14:35:00,128 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:00" (1/1) ... [2022-11-23 14:35:00,129 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:00" (1/1) ... [2022-11-23 14:35:00,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:35:00,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:35:00,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:35:00,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:35:00,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:00" (1/1) ... [2022-11-23 14:35:00,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:35:00,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:35:00,172 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:35:00,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:35:00,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:35:00,221 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-23 14:35:00,221 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-23 14:35:00,222 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-23 14:35:00,222 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-23 14:35:00,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-23 14:35:00,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:35:00,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 14:35:00,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-23 14:35:00,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:35:00,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:35:00,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:35:00,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-23 14:35:00,225 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 14:35:00,358 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:35:00,361 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:35:00,934 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:35:00,942 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:35:00,943 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-23 14:35:00,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:35:00 BoogieIcfgContainer [2022-11-23 14:35:00,945 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:35:00,947 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:35:00,947 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:35:00,951 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:35:00,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:34:59" (1/3) ... [2022-11-23 14:35:00,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f36debb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:35:00, skipping insertion in model container [2022-11-23 14:35:00,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:00" (2/3) ... [2022-11-23 14:35:00,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f36debb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:35:00, skipping insertion in model container [2022-11-23 14:35:00,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:35:00" (3/3) ... [2022-11-23 14:35:00,963 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2022-11-23 14:35:00,983 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:35:00,983 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2022-11-23 14:35:00,985 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 14:35:01,169 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-23 14:35:01,222 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 14:35:01,241 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 186 places, 194 transitions, 404 flow [2022-11-23 14:35:01,247 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 186 places, 194 transitions, 404 flow [2022-11-23 14:35:01,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 194 transitions, 404 flow [2022-11-23 14:35:01,388 INFO L130 PetriNetUnfolder]: 15/192 cut-off events. [2022-11-23 14:35:01,388 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 14:35:01,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 192 events. 15/192 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 224 event pairs, 0 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 140. Up to 3 conditions per place. [2022-11-23 14:35:01,399 INFO L119 LiptonReduction]: Number of co-enabled transitions 1720 [2022-11-23 14:35:27,363 INFO L134 LiptonReduction]: Checked pairs total: 2579 [2022-11-23 14:35:27,363 INFO L136 LiptonReduction]: Total number of compositions: 214 [2022-11-23 14:35:27,372 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 43 transitions, 102 flow [2022-11-23 14:35:27,404 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 233 states, 131 states have (on average 4.648854961832061) internal successors, (609), 232 states have internal predecessors, (609), 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 14:35:27,423 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:35:27,430 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;@5a3c7b4b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:35:27,430 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2022-11-23 14:35:27,433 INFO L276 IsEmpty]: Start isEmpty. Operand has 233 states, 131 states have (on average 4.648854961832061) internal successors, (609), 232 states have internal predecessors, (609), 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 14:35:27,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 14:35:27,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:27,439 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 14:35:27,439 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 14:35:27,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:27,445 INFO L85 PathProgramCache]: Analyzing trace with hash 23495, now seen corresponding path program 1 times [2022-11-23 14:35:27,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:35:27,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2126810750] [2022-11-23 14:35:27,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:27,458 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:35:27,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:35:27,465 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:35:27,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-23 14:35:27,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:27,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:35:27,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:35:27,767 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 14:35:27,769 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 14:35:27,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:35:27,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:35:27,793 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:35:27,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2126810750] [2022-11-23 14:35:27,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2126810750] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:27,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:35:27,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:35:27,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126614800] [2022-11-23 14:35:27,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:27,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:35:27,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:35:27,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:35:27,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:35:27,825 INFO L87 Difference]: Start difference. First operand has 233 states, 131 states have (on average 4.648854961832061) internal successors, (609), 232 states have internal predecessors, (609), 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 14:35:28,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:28,076 INFO L93 Difference]: Finished difference Result 230 states and 606 transitions. [2022-11-23 14:35:28,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:35:28,078 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 14:35:28,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:28,090 INFO L225 Difference]: With dead ends: 230 [2022-11-23 14:35:28,090 INFO L226 Difference]: Without dead ends: 230 [2022-11-23 14:35:28,091 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 14:35:28,095 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:28,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 0 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:35:28,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-11-23 14:35:28,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2022-11-23 14:35:28,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 131 states have (on average 4.625954198473282) internal successors, (606), 229 states have internal predecessors, (606), 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 14:35:28,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 606 transitions. [2022-11-23 14:35:28,146 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 606 transitions. Word has length 2 [2022-11-23 14:35:28,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:28,147 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 606 transitions. [2022-11-23 14:35:28,147 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 14:35:28,148 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 606 transitions. [2022-11-23 14:35:28,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 14:35:28,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:28,148 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 14:35:28,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -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)] Ended with exit code 0 [2022-11-23 14:35:28,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:35:28,360 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 14:35:28,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:28,361 INFO L85 PathProgramCache]: Analyzing trace with hash 23496, now seen corresponding path program 1 times [2022-11-23 14:35:28,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:35:28,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1302248968] [2022-11-23 14:35:28,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:28,362 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:35:28,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:35:28,364 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:35:28,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-23 14:35:28,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:28,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:35:28,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:35:28,576 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 14:35:28,576 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 14:35:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:35:28,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:35:28,611 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:35:28,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1302248968] [2022-11-23 14:35:28,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1302248968] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:28,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:35:28,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:35:28,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805536872] [2022-11-23 14:35:28,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:28,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:35:28,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:35:28,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:35:28,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:35:28,614 INFO L87 Difference]: Start difference. First operand 230 states and 606 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 14:35:29,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:29,087 INFO L93 Difference]: Finished difference Result 457 states and 1209 transitions. [2022-11-23 14:35:29,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:35:29,088 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 14:35:29,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:29,092 INFO L225 Difference]: With dead ends: 457 [2022-11-23 14:35:29,092 INFO L226 Difference]: Without dead ends: 457 [2022-11-23 14:35:29,093 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 14:35:29,094 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:29,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 0 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:35:29,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-11-23 14:35:29,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 232. [2022-11-23 14:35:29,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 133 states have (on average 4.601503759398496) internal successors, (612), 231 states have internal predecessors, (612), 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 14:35:29,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 612 transitions. [2022-11-23 14:35:29,115 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 612 transitions. Word has length 2 [2022-11-23 14:35:29,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:29,116 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 612 transitions. [2022-11-23 14:35:29,116 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 14:35:29,116 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 612 transitions. [2022-11-23 14:35:29,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 14:35:29,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:29,117 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 14:35:29,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:35:29,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:35:29,329 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 14:35:29,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:29,329 INFO L85 PathProgramCache]: Analyzing trace with hash 733768, now seen corresponding path program 1 times [2022-11-23 14:35:29,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:35:29,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [108653588] [2022-11-23 14:35:29,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:29,330 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:35:29,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:35:29,331 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:35:29,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-23 14:35:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:29,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:35:29,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:35:29,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:29,485 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 14:35:29,486 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 14:35:29,568 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:35:29,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:35:29,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:35:29,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:35:29,581 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:35:29,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [108653588] [2022-11-23 14:35:29,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [108653588] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:29,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:35:29,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:35:29,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303087436] [2022-11-23 14:35:29,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:29,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:35:29,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:35:29,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:35:29,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:35:29,584 INFO L87 Difference]: Start difference. First operand 232 states and 612 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 14:35:29,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:29,830 INFO L93 Difference]: Finished difference Result 189 states and 478 transitions. [2022-11-23 14:35:29,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:35:29,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 14:35:29,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:29,833 INFO L225 Difference]: With dead ends: 189 [2022-11-23 14:35:29,833 INFO L226 Difference]: Without dead ends: 189 [2022-11-23 14:35:29,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 1 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 14:35:29,835 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:29,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:35:29,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-23 14:35:29,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-11-23 14:35:29,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 116 states have (on average 4.120689655172414) internal successors, (478), 188 states have internal predecessors, (478), 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 14:35:29,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 478 transitions. [2022-11-23 14:35:29,852 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 478 transitions. Word has length 3 [2022-11-23 14:35:29,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:29,852 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 478 transitions. [2022-11-23 14:35:29,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 14:35:29,853 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 478 transitions. [2022-11-23 14:35:29,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 14:35:29,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:29,853 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 14:35:29,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -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 14:35:30,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:35:30,066 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 14:35:30,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:30,067 INFO L85 PathProgramCache]: Analyzing trace with hash 733769, now seen corresponding path program 1 times [2022-11-23 14:35:30,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:35:30,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1237489525] [2022-11-23 14:35:30,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:30,067 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:35:30,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:35:30,069 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:35:30,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-23 14:35:30,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:30,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 14:35:30,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:35:30,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:30,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:30,250 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:35:30,250 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 14:35:30,270 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 14:35:30,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:30,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 14:35:30,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:35:30,377 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:35:30,377 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:35:30,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1237489525] [2022-11-23 14:35:30,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1237489525] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:30,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:35:30,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:35:30,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831681920] [2022-11-23 14:35:30,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:30,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:35:30,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:35:30,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:35:30,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:35:30,379 INFO L87 Difference]: Start difference. First operand 189 states and 478 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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 14:35:30,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:30,624 INFO L93 Difference]: Finished difference Result 146 states and 344 transitions. [2022-11-23 14:35:30,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:35:30,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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 14:35:30,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:30,626 INFO L225 Difference]: With dead ends: 146 [2022-11-23 14:35:30,627 INFO L226 Difference]: Without dead ends: 146 [2022-11-23 14:35:30,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 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 14:35:30,628 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:30,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 0 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:35:30,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-23 14:35:30,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-11-23 14:35:30,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 99 states have (on average 3.474747474747475) internal successors, (344), 145 states have internal predecessors, (344), 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 14:35:30,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 344 transitions. [2022-11-23 14:35:30,646 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 344 transitions. Word has length 3 [2022-11-23 14:35:30,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:30,646 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 344 transitions. [2022-11-23 14:35:30,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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 14:35:30,646 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 344 transitions. [2022-11-23 14:35:30,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 14:35:30,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:30,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 14:35:30,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:35:30,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:35:30,862 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 14:35:30,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:30,862 INFO L85 PathProgramCache]: Analyzing trace with hash 731815, now seen corresponding path program 1 times [2022-11-23 14:35:30,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:35:30,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [233260903] [2022-11-23 14:35:30,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:30,863 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:35:30,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:35:30,864 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:35:30,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-23 14:35:30,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:30,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 14:35:30,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:35:31,007 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 14:35:31,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 14:35:31,077 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 14:35:31,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:35:31,326 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 14:35:31,327 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:35:31,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [233260903] [2022-11-23 14:35:31,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [233260903] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:35:31,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1479466621] [2022-11-23 14:35:31,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:31,327 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:35:31,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:35:31,333 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:35:31,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-23 14:35:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:31,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 14:35:31,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:35:31,583 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 14:35:31,583 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 14:35:31,660 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 14:35:31,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:35:31,768 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 14:35:31,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1479466621] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:35:31,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826556700] [2022-11-23 14:35:31,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:31,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:35:31,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:35:31,774 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:35:31,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:35:31,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:31,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 14:35:31,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:35:31,934 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 14:35:31,935 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 14:35:31,985 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 14:35:31,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:35:32,143 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 14:35:32,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826556700] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:35:32,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:35:32,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-23 14:35:32,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508197654] [2022-11-23 14:35:32,143 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:35:32,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:35:32,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:35:32,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:35:32,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:35:32,145 INFO L87 Difference]: Start difference. First operand 146 states and 344 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 14:35:34,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:34,333 INFO L93 Difference]: Finished difference Result 569 states and 1355 transitions. [2022-11-23 14:35:34,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:35:34,335 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 14:35:34,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:34,339 INFO L225 Difference]: With dead ends: 569 [2022-11-23 14:35:34,339 INFO L226 Difference]: Without dead ends: 569 [2022-11-23 14:35:34,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:35:34,340 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 377 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:34,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 0 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-23 14:35:34,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-11-23 14:35:34,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 152. [2022-11-23 14:35:34,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 105 states have (on average 3.3904761904761904) internal successors, (356), 151 states have internal predecessors, (356), 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 14:35:34,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 356 transitions. [2022-11-23 14:35:34,354 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 356 transitions. Word has length 3 [2022-11-23 14:35:34,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:34,354 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 356 transitions. [2022-11-23 14:35:34,354 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 14:35:34,354 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 356 transitions. [2022-11-23 14:35:34,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 14:35:34,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:34,355 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 14:35:34,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:35:34,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:35:34,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:35:34,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:35:34,958 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 14:35:34,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:34,958 INFO L85 PathProgramCache]: Analyzing trace with hash 705165826, now seen corresponding path program 1 times [2022-11-23 14:35:34,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:35:34,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1250732443] [2022-11-23 14:35:34,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:34,959 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:35:34,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:35:34,960 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:35:34,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -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 14:35:35,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:35,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:35:35,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:35:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:35:35,137 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:35:35,137 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:35:35,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1250732443] [2022-11-23 14:35:35,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1250732443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:35,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:35:35,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:35:35,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351835203] [2022-11-23 14:35:35,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:35,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:35:35,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:35:35,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:35:35,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:35:35,139 INFO L87 Difference]: Start difference. First operand 152 states and 356 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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 14:35:35,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:35,539 INFO L93 Difference]: Finished difference Result 217 states and 478 transitions. [2022-11-23 14:35:35,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:35:35,539 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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 14:35:35,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:35,541 INFO L225 Difference]: With dead ends: 217 [2022-11-23 14:35:35,541 INFO L226 Difference]: Without dead ends: 217 [2022-11-23 14:35:35,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:35:35,542 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:35,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 0 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 14:35:35,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-11-23 14:35:35,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 174. [2022-11-23 14:35:35,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 127 states have (on average 3.1968503937007875) internal successors, (406), 173 states have internal predecessors, (406), 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 14:35:35,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 406 transitions. [2022-11-23 14:35:35,552 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 406 transitions. Word has length 5 [2022-11-23 14:35:35,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:35,553 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 406 transitions. [2022-11-23 14:35:35,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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 14:35:35,554 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 406 transitions. [2022-11-23 14:35:35,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 14:35:35,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:35,554 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 14:35:35,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -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 14:35:35,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:35:35,768 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 14:35:35,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:35,768 INFO L85 PathProgramCache]: Analyzing trace with hash 705165960, now seen corresponding path program 1 times [2022-11-23 14:35:35,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:35:35,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [316764779] [2022-11-23 14:35:35,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:35,768 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:35:35,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:35:35,769 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:35:35,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-23 14:35:35,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:35,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 14:35:35,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:35:35,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:35,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:35,938 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:35:35,938 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 14:35:35,947 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 14 treesize of output 12 [2022-11-23 14:35:35,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:35,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 14:35:36,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:35:36,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:35:36,067 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:35:36,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [316764779] [2022-11-23 14:35:36,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [316764779] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:36,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:35:36,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:35:36,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529797170] [2022-11-23 14:35:36,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:36,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:35:36,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:35:36,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:35:36,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:35:36,069 INFO L87 Difference]: Start difference. First operand 174 states and 406 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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 14:35:36,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:36,343 INFO L93 Difference]: Finished difference Result 160 states and 377 transitions. [2022-11-23 14:35:36,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:35:36,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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 14:35:36,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:36,345 INFO L225 Difference]: With dead ends: 160 [2022-11-23 14:35:36,345 INFO L226 Difference]: Without dead ends: 160 [2022-11-23 14:35:36,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:35:36,346 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 56 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:36,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 0 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:35:36,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-23 14:35:36,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-11-23 14:35:36,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 123 states have (on average 3.065040650406504) internal successors, (377), 159 states have internal predecessors, (377), 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 14:35:36,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 377 transitions. [2022-11-23 14:35:36,355 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 377 transitions. Word has length 5 [2022-11-23 14:35:36,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:36,355 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 377 transitions. [2022-11-23 14:35:36,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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 14:35:36,355 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 377 transitions. [2022-11-23 14:35:36,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 14:35:36,356 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:36,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 14:35:36,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-23 14:35:36,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:35:36,566 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 14:35:36,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:36,566 INFO L85 PathProgramCache]: Analyzing trace with hash 705165962, now seen corresponding path program 1 times [2022-11-23 14:35:36,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:35:36,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614338482] [2022-11-23 14:35:36,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:36,567 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:35:36,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:35:36,568 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:35:36,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-23 14:35:36,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:36,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-23 14:35:36,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:35:36,706 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-23 14:35:36,706 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 14:35:36,739 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:35:36,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-23 14:35:36,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:35:36,754 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:35:36,754 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:35:36,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1614338482] [2022-11-23 14:35:36,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1614338482] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:36,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:35:36,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:35:36,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417630310] [2022-11-23 14:35:36,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:36,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:35:36,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:35:36,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:35:36,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:35:36,757 INFO L87 Difference]: Start difference. First operand 160 states and 377 transitions. Second operand has 3 states, 2 states have (on average 2.5) 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 14:35:36,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:36,937 INFO L93 Difference]: Finished difference Result 146 states and 348 transitions. [2022-11-23 14:35:36,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:35:36,937 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) 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 14:35:36,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:36,939 INFO L225 Difference]: With dead ends: 146 [2022-11-23 14:35:36,939 INFO L226 Difference]: Without dead ends: 146 [2022-11-23 14:35:36,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 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 14:35:36,940 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:36,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 0 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:35:36,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-23 14:35:36,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-11-23 14:35:36,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 119 states have (on average 2.9243697478991595) internal successors, (348), 145 states have internal predecessors, (348), 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 14:35:36,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 348 transitions. [2022-11-23 14:35:36,948 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 348 transitions. Word has length 5 [2022-11-23 14:35:36,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:36,948 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 348 transitions. [2022-11-23 14:35:36,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) 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 14:35:36,948 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 348 transitions. [2022-11-23 14:35:36,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 14:35:36,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:36,949 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 14:35:36,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-23 14:35:37,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:35:37,161 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 14:35:37,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:37,161 INFO L85 PathProgramCache]: Analyzing trace with hash 331860675, now seen corresponding path program 1 times [2022-11-23 14:35:37,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:35:37,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940787636] [2022-11-23 14:35:37,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:37,162 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:35:37,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:35:37,163 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:35:37,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-23 14:35:37,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:37,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:35:37,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:35:37,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:35:37,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:35:37,339 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:35:37,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940787636] [2022-11-23 14:35:37,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940787636] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:37,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:35:37,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:35:37,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628194935] [2022-11-23 14:35:37,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:37,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:35:37,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:35:37,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:35:37,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:35:37,341 INFO L87 Difference]: Start difference. First operand 146 states and 348 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:37,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:37,818 INFO L93 Difference]: Finished difference Result 316 states and 742 transitions. [2022-11-23 14:35:37,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:35:37,818 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-23 14:35:37,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:37,820 INFO L225 Difference]: With dead ends: 316 [2022-11-23 14:35:37,821 INFO L226 Difference]: Without dead ends: 316 [2022-11-23 14:35:37,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:35:37,821 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 57 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:37,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 0 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 14:35:37,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-11-23 14:35:37,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 146. [2022-11-23 14:35:37,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 119 states have (on average 2.9243697478991595) internal successors, (348), 145 states have internal predecessors, (348), 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 14:35:37,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 348 transitions. [2022-11-23 14:35:37,829 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 348 transitions. Word has length 6 [2022-11-23 14:35:37,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:37,829 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 348 transitions. [2022-11-23 14:35:37,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:35:37,830 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 348 transitions. [2022-11-23 14:35:37,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 14:35:37,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:37,830 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-23 14:35:37,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-23 14:35:38,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:35:38,042 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 14:35:38,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:38,042 INFO L85 PathProgramCache]: Analyzing trace with hash 330079112, now seen corresponding path program 2 times [2022-11-23 14:35:38,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:35:38,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [690568307] [2022-11-23 14:35:38,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:35:38,043 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:35:38,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:35:38,044 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:35:38,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -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 14:35:38,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:35:38,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:35:38,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 14:35:38,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:35:38,222 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 14:35:38,223 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 14:35:38,395 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 14:35:38,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:35:39,150 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 14:35:39,150 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:35:39,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [690568307] [2022-11-23 14:35:39,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [690568307] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:35:39,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1609839331] [2022-11-23 14:35:39,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:35:39,150 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:35:39,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:35:39,152 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:35:39,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-23 14:35:39,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:35:39,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:35:39,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 14:35:39,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:35:39,393 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 14:35:39,393 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 14:35:39,491 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 14:35:39,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:35:40,466 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 14:35:40,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1609839331] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:35:40,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239980918] [2022-11-23 14:35:40,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:35:40,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:35:40,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:35:40,469 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:35:40,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 14:35:40,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:35:40,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:35:40,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 14:35:40,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:35:40,670 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 14:35:40,670 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 14:35:40,750 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 14:35:40,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:35:40,957 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 14:35:40,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239980918] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:35:40,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:35:40,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-11-23 14:35:40,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694910472] [2022-11-23 14:35:40,958 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:35:40,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 14:35:40,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:35:40,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 14:35:40,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-23 14:35:40,959 INFO L87 Difference]: Start difference. First operand 146 states and 348 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 14:35:44,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:35:46,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:35:49,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:35:51,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:35:53,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:35:57,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:35:59,574 WARN L539 Checker$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 14:36:05,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:36:05,734 INFO L93 Difference]: Finished difference Result 1101 states and 2659 transitions. [2022-11-23 14:36:05,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 14:36:05,735 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 14:36:05,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:36:05,741 INFO L225 Difference]: With dead ends: 1101 [2022-11-23 14:36:05,742 INFO L226 Difference]: Without dead ends: 1101 [2022-11-23 14:36:05,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=181, Invalid=325, Unknown=0, NotChecked=0, Total=506 [2022-11-23 14:36:05,743 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 738 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 79 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:36:05,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [738 Valid, 0 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 942 Invalid, 4 Unknown, 0 Unchecked, 22.6s Time] [2022-11-23 14:36:05,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2022-11-23 14:36:05,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 162. [2022-11-23 14:36:05,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 135 states have (on average 2.814814814814815) internal successors, (380), 161 states have internal predecessors, (380), 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 14:36:05,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 380 transitions. [2022-11-23 14:36:05,768 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 380 transitions. Word has length 6 [2022-11-23 14:36:05,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:36:05,768 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 380 transitions. [2022-11-23 14:36:05,768 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 14:36:05,769 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 380 transitions. [2022-11-23 14:36:05,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 14:36:05,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:36:05,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:36:05,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-11-23 14:36:05,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -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 14:36:06,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 14:36:06,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:36:06,378 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 14:36:06,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:36:06,378 INFO L85 PathProgramCache]: Analyzing trace with hash -940328395, now seen corresponding path program 1 times [2022-11-23 14:36:06,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:36:06,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1722626740] [2022-11-23 14:36:06,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:36:06,379 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:36:06,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:36:06,380 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:36:06,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -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 14:36:06,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:36:06,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 14:36:06,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:36:06,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-23 14:36:06,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:36:06,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:36:06,501 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:36:06,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1722626740] [2022-11-23 14:36:06,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1722626740] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:36:06,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:36:06,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:36:06,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930422791] [2022-11-23 14:36:06,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:36:06,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:36:06,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:36:06,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:36:06,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:36:06,503 INFO L87 Difference]: Start difference. First operand 162 states and 380 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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 14:36:06,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:36:06,713 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2022-11-23 14:36:06,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:36:06,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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 14:36:06,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:36:06,715 INFO L225 Difference]: With dead ends: 132 [2022-11-23 14:36:06,715 INFO L226 Difference]: Without dead ends: 132 [2022-11-23 14:36:06,715 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 14:36:06,716 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:36:06,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 0 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:36:06,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-11-23 14:36:06,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-11-23 14:36:06,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 114 states have (on average 2.675438596491228) internal successors, (305), 131 states have internal predecessors, (305), 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 14:36:06,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 305 transitions. [2022-11-23 14:36:06,720 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 305 transitions. Word has length 7 [2022-11-23 14:36:06,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:36:06,721 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 305 transitions. [2022-11-23 14:36:06,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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 14:36:06,721 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 305 transitions. [2022-11-23 14:36:06,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 14:36:06,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:36:06,721 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:36:06,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -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 14:36:06,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:36:06,931 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 14:36:06,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:36:06,932 INFO L85 PathProgramCache]: Analyzing trace with hash -940328394, now seen corresponding path program 1 times [2022-11-23 14:36:06,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:36:06,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1065537085] [2022-11-23 14:36:06,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:36:06,932 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:36:06,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:36:06,933 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:36:06,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-23 14:36:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:36:07,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 14:36:07,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:36:07,048 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 14:36:07,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:36:07,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:36:07,151 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:36:07,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1065537085] [2022-11-23 14:36:07,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1065537085] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:36:07,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:36:07,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:36:07,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490320362] [2022-11-23 14:36:07,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:36:07,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:36:07,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:36:07,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:36:07,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:36:07,153 INFO L87 Difference]: Start difference. First operand 132 states and 305 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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 14:36:07,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:36:07,517 INFO L93 Difference]: Finished difference Result 198 states and 471 transitions. [2022-11-23 14:36:07,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:36:07,517 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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 14:36:07,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:36:07,519 INFO L225 Difference]: With dead ends: 198 [2022-11-23 14:36:07,519 INFO L226 Difference]: Without dead ends: 198 [2022-11-23 14:36:07,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:36:07,520 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:36:07,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 0 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:36:07,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-23 14:36:07,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 148. [2022-11-23 14:36:07,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 130 states have (on average 3.0307692307692307) internal successors, (394), 147 states have internal predecessors, (394), 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 14:36:07,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 394 transitions. [2022-11-23 14:36:07,541 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 394 transitions. Word has length 7 [2022-11-23 14:36:07,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:36:07,541 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 394 transitions. [2022-11-23 14:36:07,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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 14:36:07,541 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 394 transitions. [2022-11-23 14:36:07,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 14:36:07,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:36:07,542 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:36:07,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-23 14:36:07,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:36:07,742 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 14:36:07,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:36:07,743 INFO L85 PathProgramCache]: Analyzing trace with hash -940328359, now seen corresponding path program 1 times [2022-11-23 14:36:07,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:36:07,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1807887472] [2022-11-23 14:36:07,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:36:07,744 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:36:07,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:36:07,745 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:36:07,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-23 14:36:07,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:36:07,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:36:07,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:36:07,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:36:07,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:36:07,938 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:36:07,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1807887472] [2022-11-23 14:36:07,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1807887472] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:36:07,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:36:07,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:36:07,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740633506] [2022-11-23 14:36:07,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:36:07,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:36:07,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:36:07,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:36:07,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:36:07,940 INFO L87 Difference]: Start difference. First operand 148 states and 394 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) 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 14:36:08,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:36:08,243 INFO L93 Difference]: Finished difference Result 168 states and 421 transitions. [2022-11-23 14:36:08,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:36:08,244 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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 14:36:08,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:36:08,245 INFO L225 Difference]: With dead ends: 168 [2022-11-23 14:36:08,245 INFO L226 Difference]: Without dead ends: 168 [2022-11-23 14:36:08,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:36:08,246 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:36:08,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:36:08,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-23 14:36:08,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 159. [2022-11-23 14:36:08,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 141 states have (on average 2.9290780141843973) internal successors, (413), 158 states have internal predecessors, (413), 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 14:36:08,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 413 transitions. [2022-11-23 14:36:08,253 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 413 transitions. Word has length 7 [2022-11-23 14:36:08,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:36:08,253 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 413 transitions. [2022-11-23 14:36:08,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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 14:36:08,254 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 413 transitions. [2022-11-23 14:36:08,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 14:36:08,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:36:08,254 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:36:08,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-23 14:36:08,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:36:08,467 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 14:36:08,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:36:08,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1697688354, now seen corresponding path program 1 times [2022-11-23 14:36:08,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:36:08,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [912162581] [2022-11-23 14:36:08,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:36:08,468 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:36:08,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:36:08,468 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:36:08,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -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 14:36:08,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:36:08,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:36:08,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:36:08,649 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 14:36:08,650 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 14:36:08,688 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:36:08,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-23 14:36:08,706 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 14:36:08,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:36:08,706 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:36:08,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [912162581] [2022-11-23 14:36:08,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [912162581] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:36:08,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:36:08,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:36:08,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319236614] [2022-11-23 14:36:08,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:36:08,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:36:08,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:36:08,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:36:08,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:36:08,708 INFO L87 Difference]: Start difference. First operand 159 states and 413 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) 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 14:36:08,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:36:08,893 INFO L93 Difference]: Finished difference Result 131 states and 323 transitions. [2022-11-23 14:36:08,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:36:08,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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 14:36:08,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:36:08,895 INFO L225 Difference]: With dead ends: 131 [2022-11-23 14:36:08,895 INFO L226 Difference]: Without dead ends: 131 [2022-11-23 14:36:08,895 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 14:36:08,896 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:36:08,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 0 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:36:08,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-23 14:36:08,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-11-23 14:36:08,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 120 states have (on average 2.691666666666667) internal successors, (323), 130 states have internal predecessors, (323), 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 14:36:08,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 323 transitions. [2022-11-23 14:36:08,901 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 323 transitions. Word has length 7 [2022-11-23 14:36:08,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:36:08,901 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 323 transitions. [2022-11-23 14:36:08,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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 14:36:08,901 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 323 transitions. [2022-11-23 14:36:08,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 14:36:08,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:36:08,901 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:36:08,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -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 14:36:09,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:36:09,102 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 14:36:09,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:36:09,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1697688355, now seen corresponding path program 1 times [2022-11-23 14:36:09,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:36:09,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2003165835] [2022-11-23 14:36:09,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:36:09,103 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:36:09,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:36:09,104 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:36:09,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -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 14:36:09,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:36:09,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 14:36:09,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:36:09,325 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 14:36:09,325 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 14:36:09,404 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 14:36:09,404 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 14:36:09,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:09,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 14:36:09,559 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:36:09,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:36:09,654 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 14:36:09,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:36:14,205 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 14:36:14,206 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:36:14,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2003165835] [2022-11-23 14:36:14,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2003165835] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:36:14,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1086637886] [2022-11-23 14:36:14,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:36:14,206 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:36:14,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:36:14,207 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:36:14,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-23 14:36:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:36:14,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 14:36:14,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:36:14,486 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 14:36:14,487 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 14:36:14,563 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 14:36:14,563 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 14:36:14,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:14,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 14:36:14,736 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:36:14,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:36:14,809 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 14:36:14,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:36:15,058 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 14:36:15,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1086637886] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:36:15,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243918957] [2022-11-23 14:36:15,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:36:15,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:36:15,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:36:15,060 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:36:15,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-23 14:36:15,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:36:15,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 14:36:15,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:36:15,238 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 14:36:15,239 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 14:36:15,373 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-23 14:36:15,374 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 14:36:15,713 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 14:36:15,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:36:18,935 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 14:36:18,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243918957] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:36:18,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:36:18,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 5, 5] total 16 [2022-11-23 14:36:18,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87432208] [2022-11-23 14:36:18,936 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:36:18,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 14:36:18,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:36:18,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 14:36:18,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=243, Unknown=1, NotChecked=0, Total=306 [2022-11-23 14:36:18,938 INFO L87 Difference]: Start difference. First operand 131 states and 323 transitions. Second operand has 18 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 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 14:36:40,238 WARN L233 SmtUtils]: Spent 20.55s on a formula simplification. DAG size of input: 51 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:36:46,131 WARN L233 SmtUtils]: Spent 5.23s on a formula simplification. DAG size of input: 46 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:37:20,428 WARN L233 SmtUtils]: Spent 33.90s on a formula simplification. DAG size of input: 60 DAG size of output: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:37:46,557 WARN L233 SmtUtils]: Spent 25.92s on a formula simplification. DAG size of input: 64 DAG size of output: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:38:06,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 14:38:09,161 WARN L539 Checker$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 14:38:11,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 14:38:13,173 WARN L539 Checker$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 14:38:16,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 14:38:18,604 WARN L539 Checker$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 14:38:20,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 14:38:26,366 WARN L233 SmtUtils]: Spent 5.16s on a formula simplification. DAG size of input: 55 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:38:28,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 14:38:31,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 14:38:33,284 WARN L539 Checker$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 14:38:35,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 14:38:40,585 WARN L233 SmtUtils]: Spent 5.06s on a formula simplification. DAG size of input: 53 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:38:42,611 WARN L539 Checker$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 14:38:44,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 14:38:46,774 WARN L539 Checker$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 14:38:48,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 14:38:50,811 WARN L539 Checker$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 14:38:50,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:38:50,872 INFO L93 Difference]: Finished difference Result 672 states and 1679 transitions. [2022-11-23 14:38:50,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-23 14:38:50,874 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 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 14:38:50,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:38:50,878 INFO L225 Difference]: With dead ends: 672 [2022-11-23 14:38:50,878 INFO L226 Difference]: Without dead ends: 672 [2022-11-23 14:38:50,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 121.8s TimeCoverageRelationStatistics Valid=230, Invalid=824, Unknown=2, NotChecked=0, Total=1056 [2022-11-23 14:38:50,892 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 442 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 46 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:38:50,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 0 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 577 Invalid, 16 Unknown, 0 Unchecked, 37.8s Time] [2022-11-23 14:38:50,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-11-23 14:38:50,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 154. [2022-11-23 14:38:50,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 143 states have (on average 2.8111888111888113) internal successors, (402), 153 states have internal predecessors, (402), 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 14:38:50,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 402 transitions. [2022-11-23 14:38:50,903 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 402 transitions. Word has length 7 [2022-11-23 14:38:50,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:38:50,903 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 402 transitions. [2022-11-23 14:38:50,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 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 14:38:50,903 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 402 transitions. [2022-11-23 14:38:50,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 14:38:50,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:38:50,908 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:38:50,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -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 14:38:51,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-23 14:38:51,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-23 14:38:51,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:38:51,521 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 14:38:51,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:38:51,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1697688472, now seen corresponding path program 1 times [2022-11-23 14:38:51,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:38:51,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1401534109] [2022-11-23 14:38:51,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:38:51,523 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 14:38:51,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:38:51,524 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:38:51,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -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 14:38:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:38:51,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:38:51,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:38:51,715 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 14:38:51,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:38:51,880 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 35 treesize of output 31 [2022-11-23 14:38:52,043 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 14:38:52,043 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:38:52,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1401534109] [2022-11-23 14:38:52,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1401534109] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:38:52,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2132409615] [2022-11-23 14:38:52,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:38:52,044 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:38:52,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:38:52,045 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:38:52,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-23 14:38:52,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:38:52,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 14:38:52,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:38:52,240 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 14:38:52,429 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 14:38:52,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:38:52,968 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 14:38:52,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2132409615] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:38:52,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247659793] [2022-11-23 14:38:52,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:38:52,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:38:52,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:38:52,969 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:38:52,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-23 14:38:53,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:38:53,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 14:38:53,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:38:53,111 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 14:38:53,203 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 14:38:53,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:38:53,454 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 14:38:53,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247659793] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:38:53,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:38:53,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 13 [2022-11-23 14:38:53,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200065113] [2022-11-23 14:38:53,455 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:38:53,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 14:38:53,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:38:53,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 14:38:53,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-11-23 14:38:53,456 INFO L87 Difference]: Start difference. First operand 154 states and 402 transitions. Second operand has 15 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 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 14:38:56,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:38:56,356 INFO L93 Difference]: Finished difference Result 545 states and 1404 transitions. [2022-11-23 14:38:56,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 14:38:56,358 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 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 14:38:56,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:38:56,360 INFO L225 Difference]: With dead ends: 545 [2022-11-23 14:38:56,360 INFO L226 Difference]: Without dead ends: 545 [2022-11-23 14:38:56,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2022-11-23 14:38:56,361 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 359 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:38:56,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 0 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-23 14:38:56,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-11-23 14:38:56,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 166. [2022-11-23 14:38:56,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 155 states have (on average 2.8838709677419354) internal successors, (447), 165 states have internal predecessors, (447), 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 14:38:56,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 447 transitions. [2022-11-23 14:38:56,371 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 447 transitions. Word has length 7 [2022-11-23 14:38:56,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:38:56,371 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 447 transitions. [2022-11-23 14:38:56,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 14 states have internal predecessors, (22), 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 14:38:56,371 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 447 transitions. [2022-11-23 14:38:56,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 14:38:56,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:38:56,372 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:38:56,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-23 14:38:56,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -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 14:38:56,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-11-23 14:38:56,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:38:56,979 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 14:38:56,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:38:56,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1090674394, now seen corresponding path program 1 times [2022-11-23 14:38:56,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:38:56,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1322619630] [2022-11-23 14:38:56,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:38:56,980 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:38:56,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:38:56,981 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:38:56,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-23 14:38:57,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:38:57,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:38:57,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:38:57,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:38:57,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:38:57,186 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:38:57,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1322619630] [2022-11-23 14:38:57,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1322619630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:38:57,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:38:57,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:38:57,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452570799] [2022-11-23 14:38:57,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:38:57,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:38:57,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:38:57,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:38:57,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:38:57,189 INFO L87 Difference]: Start difference. First operand 166 states and 447 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:38:57,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:38:57,582 INFO L93 Difference]: Finished difference Result 219 states and 526 transitions. [2022-11-23 14:38:57,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:38:57,583 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 14:38:57,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:38:57,584 INFO L225 Difference]: With dead ends: 219 [2022-11-23 14:38:57,585 INFO L226 Difference]: Without dead ends: 219 [2022-11-23 14:38:57,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:38:57,585 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:38:57,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 0 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 14:38:57,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-11-23 14:38:57,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 155. [2022-11-23 14:38:57,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 144 states have (on average 2.888888888888889) internal successors, (416), 154 states have internal predecessors, (416), 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 14:38:57,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 416 transitions. [2022-11-23 14:38:57,592 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 416 transitions. Word has length 8 [2022-11-23 14:38:57,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:38:57,592 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 416 transitions. [2022-11-23 14:38:57,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:38:57,593 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 416 transitions. [2022-11-23 14:38:57,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 14:38:57,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:38:57,593 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:38:57,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-23 14:38:57,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:38:57,806 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 14:38:57,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:38:57,806 INFO L85 PathProgramCache]: Analyzing trace with hash -609043369, now seen corresponding path program 1 times [2022-11-23 14:38:57,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:38:57,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1439310607] [2022-11-23 14:38:57,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:38:57,807 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:38:57,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:38:57,807 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:38:57,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-23 14:38:57,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:38:57,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 14:38:57,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:38:58,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:38:58,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:38:58,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:38:58,324 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:38:58,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1439310607] [2022-11-23 14:38:58,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1439310607] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:38:58,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [687083411] [2022-11-23 14:38:58,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:38:58,324 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:38:58,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:38:58,325 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:38:58,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-23 14:38:58,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:38:58,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:38:58,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:38:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:38:58,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:38:59,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:38:59,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [687083411] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:38:59,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964198629] [2022-11-23 14:38:59,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:38:59,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:38:59,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:38:59,075 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:38:59,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-23 14:38:59,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:38:59,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:38:59,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:38:59,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:38:59,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:38:59,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:38:59,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964198629] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:38:59,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:38:59,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 4, 4] total 20 [2022-11-23 14:38:59,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589717679] [2022-11-23 14:38:59,396 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:38:59,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-23 14:38:59,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:38:59,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-23 14:38:59,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-11-23 14:38:59,398 INFO L87 Difference]: Start difference. First operand 155 states and 416 transitions. Second operand has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:39:03,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:39:03,255 INFO L93 Difference]: Finished difference Result 691 states and 1676 transitions. [2022-11-23 14:39:03,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-23 14:39:03,256 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 14:39:03,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:39:03,260 INFO L225 Difference]: With dead ends: 691 [2022-11-23 14:39:03,260 INFO L226 Difference]: Without dead ends: 691 [2022-11-23 14:39:03,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=379, Invalid=1513, Unknown=0, NotChecked=0, Total=1892 [2022-11-23 14:39:03,261 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 861 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:39:03,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [861 Valid, 0 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 876 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-23 14:39:03,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-11-23 14:39:03,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 226. [2022-11-23 14:39:03,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 215 states have (on average 3.0232558139534884) internal successors, (650), 225 states have internal predecessors, (650), 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 14:39:03,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 650 transitions. [2022-11-23 14:39:03,273 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 650 transitions. Word has length 9 [2022-11-23 14:39:03,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:39:03,273 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 650 transitions. [2022-11-23 14:39:03,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:39:03,274 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 650 transitions. [2022-11-23 14:39:03,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 14:39:03,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:39:03,274 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:39:03,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-23 14:39:03,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-23 14:39:03,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-23 14:39:03,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:39:03,886 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 14:39:03,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:39:03,887 INFO L85 PathProgramCache]: Analyzing trace with hash -608918663, now seen corresponding path program 1 times [2022-11-23 14:39:03,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:39:03,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [28362667] [2022-11-23 14:39:03,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:39:03,887 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:39:03,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:39:03,888 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:39:03,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-23 14:39:04,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:39:04,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 14:39:04,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:39:04,150 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 14:39:04,151 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 14:39:04,218 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 14:39:04,218 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 14:39:04,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:04,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 14:39:04,350 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:39:04,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:39:04,462 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 14:39:04,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:39:07,110 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 14:39:07,110 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:39:07,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [28362667] [2022-11-23 14:39:07,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [28362667] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:39:07,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [814557224] [2022-11-23 14:39:07,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:39:07,111 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:39:07,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:39:07,111 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:39:07,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-23 14:39:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:39:07,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 14:39:07,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:39:07,471 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 14:39:07,471 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 14:39:07,556 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 14:39:07,556 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 14:39:07,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:07,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 14:39:07,736 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:39:07,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:39:07,838 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 14:39:07,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:39:08,108 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 14:39:08,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [814557224] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:39:08,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403261960] [2022-11-23 14:39:08,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:39:08,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:39:08,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:39:08,109 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:39:08,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-23 14:39:08,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:39:08,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 14:39:08,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:39:08,327 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 14:39:08,327 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 14:39:08,474 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-23 14:39:08,474 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 14:39:08,863 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 14:39:08,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:39:12,084 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 14:39:12,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403261960] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:39:12,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:39:12,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 5, 5] total 16 [2022-11-23 14:39:12,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49931479] [2022-11-23 14:39:12,084 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:39:12,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 14:39:12,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:39:12,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 14:39:12,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=243, Unknown=1, NotChecked=0, Total=306 [2022-11-23 14:39:12,086 INFO L87 Difference]: Start difference. First operand 226 states and 650 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 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 14:39:43,794 WARN L233 SmtUtils]: Spent 30.95s on a formula simplification. DAG size of input: 51 DAG size of output: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:39:51,020 WARN L233 SmtUtils]: Spent 6.66s on a formula simplification. DAG size of input: 46 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:40:21,578 WARN L233 SmtUtils]: Spent 30.15s on a formula simplification. DAG size of input: 60 DAG size of output: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:40:45,348 WARN L233 SmtUtils]: Spent 23.49s on a formula simplification. DAG size of input: 64 DAG size of output: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:40:56,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 14:40:58,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 14:41:04,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 14:41:07,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 14:41:12,602 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 14:41:12,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:41:12,718 INFO L93 Difference]: Finished difference Result 539 states and 1284 transitions. [2022-11-23 14:41:12,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-23 14:41:12,719 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 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 14:41:12,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:41:12,721 INFO L225 Difference]: With dead ends: 539 [2022-11-23 14:41:12,721 INFO L226 Difference]: Without dead ends: 539 [2022-11-23 14:41:12,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 111.8s TimeCoverageRelationStatistics Valid=219, Invalid=772, Unknown=1, NotChecked=0, Total=992 [2022-11-23 14:41:12,722 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 350 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 43 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:41:12,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 0 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 577 Invalid, 5 Unknown, 0 Unchecked, 14.7s Time] [2022-11-23 14:41:12,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-11-23 14:41:12,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 256. [2022-11-23 14:41:12,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 245 states have (on average 3.0) internal successors, (735), 255 states have internal predecessors, (735), 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 14:41:12,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 735 transitions. [2022-11-23 14:41:12,732 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 735 transitions. Word has length 9 [2022-11-23 14:41:12,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:41:12,733 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 735 transitions. [2022-11-23 14:41:12,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 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 14:41:12,733 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 735 transitions. [2022-11-23 14:41:12,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 14:41:12,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:41:12,734 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:41:12,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-11-23 14:41:12,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-11-23 14:41:13,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-23 14:41:13,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:41:13,347 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 14:41:13,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:41:13,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1696606226, now seen corresponding path program 1 times [2022-11-23 14:41:13,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:41:13,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057473130] [2022-11-23 14:41:13,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:13,348 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:41:13,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:41:13,349 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:41:13,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-23 14:41:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:13,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 14:41:13,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:41:13,511 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 14:41:13,659 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 14:41:13,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:41:14,533 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 14:41:14,533 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:41:14,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2057473130] [2022-11-23 14:41:14,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2057473130] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:41:14,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1006453897] [2022-11-23 14:41:14,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:14,533 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:41:14,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:41:14,534 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:41:14,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-23 14:41:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:14,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:41:14,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:41:14,958 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:41:14,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:41:15,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:41:15,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1006453897] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:41:15,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955680189] [2022-11-23 14:41:15,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:15,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:41:15,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:41:15,294 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:41:15,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-23 14:41:15,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:15,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:41:15,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:41:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:41:15,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:41:15,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:41:15,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955680189] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:41:15,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:41:15,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 16 [2022-11-23 14:41:15,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099672578] [2022-11-23 14:41:15,540 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:41:15,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 14:41:15,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:41:15,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 14:41:15,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-11-23 14:41:15,541 INFO L87 Difference]: Start difference. First operand 256 states and 735 transitions. Second operand has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 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 14:41:20,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:41:20,341 INFO L93 Difference]: Finished difference Result 583 states and 1613 transitions. [2022-11-23 14:41:20,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 14:41:20,342 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 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 10 [2022-11-23 14:41:20,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:41:20,346 INFO L225 Difference]: With dead ends: 583 [2022-11-23 14:41:20,346 INFO L226 Difference]: Without dead ends: 583 [2022-11-23 14:41:20,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2022-11-23 14:41:20,346 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 559 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:41:20,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 0 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-23 14:41:20,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-11-23 14:41:20,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 347. [2022-11-23 14:41:20,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 336 states have (on average 3.455357142857143) internal successors, (1161), 346 states have internal predecessors, (1161), 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 14:41:20,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 1161 transitions. [2022-11-23 14:41:20,359 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 1161 transitions. Word has length 10 [2022-11-23 14:41:20,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:41:20,360 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 1161 transitions. [2022-11-23 14:41:20,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 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 14:41:20,360 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 1161 transitions. [2022-11-23 14:41:20,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 14:41:20,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:41:20,361 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-23 14:41:20,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-23 14:41:20,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-23 14:41:20,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-23 14:41:20,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:41:20,969 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 14:41:20,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:41:20,969 INFO L85 PathProgramCache]: Analyzing trace with hash -151207036, now seen corresponding path program 2 times [2022-11-23 14:41:20,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:41:20,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1024944183] [2022-11-23 14:41:20,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:41:20,970 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:41:20,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:41:20,971 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:41:20,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-23 14:41:21,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-23 14:41:21,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:41:21,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 14:41:21,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:41:21,161 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 14:41:21,161 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 14:41:21,240 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 14:41:21,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 14:41:21,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:41:21,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 14:41:21,395 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:41:21,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:41:21,477 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-23 14:41:21,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:41:21,478 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:41:21,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1024944183] [2022-11-23 14:41:21,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1024944183] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:41:21,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:41:21,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:41:21,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497543871] [2022-11-23 14:41:21,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:41:21,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:41:21,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:41:21,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:41:21,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:41:21,479 INFO L87 Difference]: Start difference. First operand 347 states and 1161 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) 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 14:41:21,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:41:21,800 INFO L93 Difference]: Finished difference Result 425 states and 1351 transitions. [2022-11-23 14:41:21,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:41:21,801 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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 10 [2022-11-23 14:41:21,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:41:21,805 INFO L225 Difference]: With dead ends: 425 [2022-11-23 14:41:21,805 INFO L226 Difference]: Without dead ends: 425 [2022-11-23 14:41:21,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:41:21,806 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:41:21,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 0 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:41:21,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-11-23 14:41:21,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 319. [2022-11-23 14:41:21,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 308 states have (on average 3.2564935064935066) internal successors, (1003), 318 states have internal predecessors, (1003), 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 14:41:21,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 1003 transitions. [2022-11-23 14:41:21,816 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 1003 transitions. Word has length 10 [2022-11-23 14:41:21,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:41:21,817 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 1003 transitions. [2022-11-23 14:41:21,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) 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 14:41:21,817 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 1003 transitions. [2022-11-23 14:41:21,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 14:41:21,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:41:21,818 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:41:21,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-23 14:41:22,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:41:22,030 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 14:41:22,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:41:22,031 INFO L85 PathProgramCache]: Analyzing trace with hash 702109680, now seen corresponding path program 1 times [2022-11-23 14:41:22,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:41:22,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [235121625] [2022-11-23 14:41:22,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:22,031 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:41:22,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:41:22,032 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:41:22,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-23 14:41:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:22,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 14:41:22,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:41:22,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:41:22,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:41:22,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:41:22,655 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:41:22,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [235121625] [2022-11-23 14:41:22,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [235121625] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:41:22,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [772099014] [2022-11-23 14:41:22,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:22,656 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:41:22,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:41:22,657 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:41:22,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-23 14:41:22,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:22,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:41:22,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:41:23,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:41:23,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:41:23,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:41:23,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [772099014] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:41:23,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844190216] [2022-11-23 14:41:23,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:41:23,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:41:23,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:41:23,079 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:41:23,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-23 14:41:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:41:23,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:41:23,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:41:23,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:41:23,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:41:23,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:41:23,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844190216] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:41:23,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:41:23,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5, 5, 5, 5] total 13 [2022-11-23 14:41:23,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721592655] [2022-11-23 14:41:23,393 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:41:23,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 14:41:23,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:41:23,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 14:41:23,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-11-23 14:41:23,394 INFO L87 Difference]: Start difference. First operand 319 states and 1003 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:41:24,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:41:24,483 INFO L93 Difference]: Finished difference Result 465 states and 1187 transitions. [2022-11-23 14:41:24,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 14:41:24,484 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 14:41:24,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:41:24,486 INFO L225 Difference]: With dead ends: 465 [2022-11-23 14:41:24,486 INFO L226 Difference]: Without dead ends: 465 [2022-11-23 14:41:24,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2022-11-23 14:41:24,487 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 267 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:41:24,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 0 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 14:41:24,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-11-23 14:41:24,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 282. [2022-11-23 14:41:24,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 271 states have (on average 3.081180811808118) internal successors, (835), 281 states have internal predecessors, (835), 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 14:41:24,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 835 transitions. [2022-11-23 14:41:24,498 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 835 transitions. Word has length 11 [2022-11-23 14:41:24,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:41:24,499 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 835 transitions. [2022-11-23 14:41:24,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:41:24,499 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 835 transitions. [2022-11-23 14:41:24,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 14:41:24,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:41:24,500 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:41:24,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-11-23 14:41:24,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-11-23 14:41:24,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-23 14:41:25,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:41:25,106 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 14:41:25,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:41:25,106 INFO L85 PathProgramCache]: Analyzing trace with hash 641895287, now seen corresponding path program 2 times [2022-11-23 14:41:25,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:41:25,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1034211410] [2022-11-23 14:41:25,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:41:25,107 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:41:25,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:41:25,108 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:41:25,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-23 14:41:25,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:41:25,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:41:25,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 14:41:25,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:41:25,369 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-23 14:41:25,369 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 27 [2022-11-23 14:41:25,444 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 14:41:25,444 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 14:41:25,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:41:25,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 14:41:25,602 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:41:25,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:41:25,708 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:41:25,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:41:28,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:41:28,810 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:41:28,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1034211410] [2022-11-23 14:41:28,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1034211410] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:41:28,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [636071139] [2022-11-23 14:41:28,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:41:28,810 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:41:28,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:41:28,811 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:41:28,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-23 14:41:29,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:41:29,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:41:29,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 14:41:29,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:41:29,216 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 14:41:29,216 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 14:41:29,291 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 14:41:29,291 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 14:41:29,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:41:29,539 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 19 treesize of output 19 [2022-11-23 14:41:29,550 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:41:29,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:41:29,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:41:29,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:41:31,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:41:31,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [636071139] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:41:31,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185213484] [2022-11-23 14:41:31,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:41:31,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:41:31,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:41:31,238 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:41:31,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-23 14:41:31,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:41:31,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:41:31,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 14:41:31,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:41:31,526 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 14:41:31,526 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 14:41:31,598 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 14:41:31,599 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 14:41:31,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:41:31,813 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 21 treesize of output 21 [2022-11-23 14:41:31,836 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:41:31,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:41:32,074 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:41:32,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:41:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:41:34,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185213484] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:41:34,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:41:34,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 6] total 23 [2022-11-23 14:41:34,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965516126] [2022-11-23 14:41:34,165 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:41:34,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 14:41:34,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:41:34,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 14:41:34,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2022-11-23 14:41:34,166 INFO L87 Difference]: Start difference. First operand 282 states and 835 transitions. Second operand has 25 states, 24 states have (on average 1.8333333333333333) 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 14:41:49,153 WARN L233 SmtUtils]: Spent 6.99s on a formula simplification. DAG size of input: 68 DAG size of output: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:42:06,546 WARN L233 SmtUtils]: Spent 15.16s on a formula simplification. DAG size of input: 84 DAG size of output: 83 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:42:20,025 WARN L233 SmtUtils]: Spent 11.15s on a formula simplification. DAG size of input: 75 DAG size of output: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:42:26,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:26,646 INFO L93 Difference]: Finished difference Result 1570 states and 4490 transitions. [2022-11-23 14:42:26,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-23 14:42:26,647 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.8333333333333333) 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 14:42:26,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:26,658 INFO L225 Difference]: With dead ends: 1570 [2022-11-23 14:42:26,658 INFO L226 Difference]: Without dead ends: 1570 [2022-11-23 14:42:26,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 47.5s TimeCoverageRelationStatistics Valid=548, Invalid=2104, Unknown=0, NotChecked=0, Total=2652 [2022-11-23 14:42:26,659 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1060 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1555 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1060 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:26,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1060 Valid, 0 Invalid, 1620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1555 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time] [2022-11-23 14:42:26,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1570 states. [2022-11-23 14:42:26,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1570 to 427. [2022-11-23 14:42:26,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 416 states have (on average 3.6033653846153846) internal successors, (1499), 426 states have internal predecessors, (1499), 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 14:42:26,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1499 transitions. [2022-11-23 14:42:26,679 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1499 transitions. Word has length 11 [2022-11-23 14:42:26,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:26,679 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 1499 transitions. [2022-11-23 14:42:26,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.8333333333333333) 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 14:42:26,680 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1499 transitions. [2022-11-23 14:42:26,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 14:42:26,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:26,681 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:26,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-23 14:42:26,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-11-23 14:42:27,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-11-23 14:42:27,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:42:27,294 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 14:42:27,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:27,294 INFO L85 PathProgramCache]: Analyzing trace with hash 641895404, now seen corresponding path program 1 times [2022-11-23 14:42:27,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:42:27,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473877980] [2022-11-23 14:42:27,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:27,295 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:42:27,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:42:27,296 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:42:27,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-23 14:42:27,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:27,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 14:42:27,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:42:27,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:42:27,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-23 14:42:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:42:28,199 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:42:28,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473877980] [2022-11-23 14:42:28,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473877980] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:42:28,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1931763210] [2022-11-23 14:42:28,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:28,199 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:42:28,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:42:28,200 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:42:28,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-23 14:42:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:28,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-23 14:42:28,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:28,497 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 14:42:28,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:42:28,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:42:29,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:42:29,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1931763210] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:42:29,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338441049] [2022-11-23 14:42:29,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:29,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:29,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:29,847 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:42:29,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-23 14:42:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:30,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 14:42:30,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:30,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:42:30,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:42:30,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:42:30,687 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:42:30,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338441049] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:42:30,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:42:30,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 22 [2022-11-23 14:42:30,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453720780] [2022-11-23 14:42:30,690 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:42:30,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-23 14:42:30,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:42:30,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-23 14:42:30,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-11-23 14:42:30,692 INFO L87 Difference]: Start difference. First operand 427 states and 1499 transitions. Second operand has 24 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:36,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:36,332 INFO L93 Difference]: Finished difference Result 1695 states and 5552 transitions. [2022-11-23 14:42:36,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-23 14:42:36,334 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 14:42:36,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:36,344 INFO L225 Difference]: With dead ends: 1695 [2022-11-23 14:42:36,344 INFO L226 Difference]: Without dead ends: 1695 [2022-11-23 14:42:36,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=290, Invalid=1042, Unknown=0, NotChecked=0, Total=1332 [2022-11-23 14:42:36,346 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 700 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:36,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [700 Valid, 0 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-23 14:42:36,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1695 states. [2022-11-23 14:42:36,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1695 to 463. [2022-11-23 14:42:36,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 452 states have (on average 3.603982300884956) internal successors, (1629), 462 states have internal predecessors, (1629), 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 14:42:36,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1629 transitions. [2022-11-23 14:42:36,382 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1629 transitions. Word has length 11 [2022-11-23 14:42:36,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:36,384 INFO L495 AbstractCegarLoop]: Abstraction has 463 states and 1629 transitions. [2022-11-23 14:42:36,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:36,384 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1629 transitions. [2022-11-23 14:42:36,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 14:42:36,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:36,385 INFO L195 NwaCegarLoop]: trace histogram [9, 1, 1, 1] [2022-11-23 14:42:36,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-23 14:42:36,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2022-11-23 14:42:36,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-23 14:42:36,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:36,998 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 14:42:36,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:36,999 INFO L85 PathProgramCache]: Analyzing trace with hash 2142721879, now seen corresponding path program 1 times [2022-11-23 14:42:36,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:42:36,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [512294083] [2022-11-23 14:42:36,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:36,999 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:42:36,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:42:37,000 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:42:37,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-23 14:42:37,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:37,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 14:42:37,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:37,166 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 14:42:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:42:37,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:42:40,575 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:42:40,575 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:42:40,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [512294083] [2022-11-23 14:42:40,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [512294083] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:42:40,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1008635982] [2022-11-23 14:42:40,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:40,576 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:42:40,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:42:40,582 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:42:40,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-23 14:42:40,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:40,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 14:42:40,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:40,907 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 14:42:41,538 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:42:41,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:42:45,235 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:42:45,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1008635982] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:42:45,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980112163] [2022-11-23 14:42:45,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:45,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:42:45,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:45,236 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:42:45,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-23 14:42:45,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:45,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 14:42:45,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:42:45,461 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 14:42:45,638 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:42:45,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:42:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:42:46,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980112163] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:42:46,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:42:46,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 39 [2022-11-23 14:42:46,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265129441] [2022-11-23 14:42:46,376 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:42:46,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-23 14:42:46,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:42:46,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-23 14:42:46,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=1105, Unknown=0, NotChecked=0, Total=1560 [2022-11-23 14:42:46,377 INFO L87 Difference]: Start difference. First operand 463 states and 1629 transitions. Second operand has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 40 states have internal predecessors, (45), 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 14:42:53,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:42:55,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:42:57,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:42:59,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:43:01,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:43:03,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:43:05,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:43:07,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:43:09,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:43:11,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:43:13,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:43:15,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:43:17,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:43:19,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:43:21,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:43:23,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:43:50,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:43:50,384 INFO L93 Difference]: Finished difference Result 6794 states and 25713 transitions. [2022-11-23 14:43:50,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-23 14:43:50,387 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-23 14:43:50,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:43:50,448 INFO L225 Difference]: With dead ends: 6794 [2022-11-23 14:43:50,448 INFO L226 Difference]: Without dead ends: 6794 [2022-11-23 14:43:50,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=1123, Invalid=2183, Unknown=0, NotChecked=0, Total=3306 [2022-11-23 14:43:50,449 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3282 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2957 mSolverCounterSat, 318 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3282 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 2957 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:43:50,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3282 Valid, 0 Invalid, 3290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 2957 Invalid, 15 Unknown, 0 Unchecked, 44.2s Time] [2022-11-23 14:43:50,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6794 states. [2022-11-23 14:43:50,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6794 to 520. [2022-11-23 14:43:50,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 509 states have (on average 3.4243614931237722) internal successors, (1743), 519 states have internal predecessors, (1743), 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 14:43:50,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 1743 transitions. [2022-11-23 14:43:50,551 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 1743 transitions. Word has length 12 [2022-11-23 14:43:50,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:43:50,551 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 1743 transitions. [2022-11-23 14:43:50,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 40 states have internal predecessors, (45), 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 14:43:50,551 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 1743 transitions. [2022-11-23 14:43:50,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 14:43:50,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:43:50,552 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:43:50,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-23 14:43:50,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-23 14:43:50,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2022-11-23 14:43:51,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:43:51,153 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 14:43:51,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:43:51,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1572213519, now seen corresponding path program 2 times [2022-11-23 14:43:51,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:43:51,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1805825882] [2022-11-23 14:43:51,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:43:51,154 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:43:51,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:43:51,155 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:43:51,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-23 14:43:51,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:43:51,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:43:51,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-23 14:43:51,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:43:51,431 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-23 14:43:51,431 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 27 [2022-11-23 14:43:51,496 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 14:43:51,497 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 14:43:51,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:51,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 14:43:51,684 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:43:51,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:43:51,788 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:43:51,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:43:54,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:43:54,841 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:43:54,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1805825882] [2022-11-23 14:43:54,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1805825882] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:43:54,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [102174694] [2022-11-23 14:43:54,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:43:54,842 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:43:54,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:43:54,843 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:43:54,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-11-23 14:43:55,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:43:55,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:43:55,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-23 14:43:55,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:43:55,355 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 14:43:55,355 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 14:43:55,429 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 14:43:55,430 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 14:43:55,701 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:43:55,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:43:55,723 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 21 treesize of output 21 [2022-11-23 14:43:56,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:43:56,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:44:00,133 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:44:00,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [102174694] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:44:00,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683473723] [2022-11-23 14:44:00,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 14:44:00,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:44:00,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:44:00,135 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:44:00,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-23 14:44:00,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 14:44:00,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:44:00,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-23 14:44:00,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:44:00,448 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 14:44:00,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 14:44:00,851 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-23 14:44:00,851 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 14:44:01,857 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:44:01,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:44:12,278 WARN L233 SmtUtils]: Spent 6.10s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:44:19,345 WARN L233 SmtUtils]: Spent 6.12s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:44:24,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:44:24,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683473723] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:44:24,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:44:24,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8, 8, 8, 8] total 41 [2022-11-23 14:44:24,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575903045] [2022-11-23 14:44:24,595 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:44:24,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-23 14:44:24,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:44:24,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-23 14:44:24,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1520, Unknown=1, NotChecked=0, Total=1806 [2022-11-23 14:44:24,596 INFO L87 Difference]: Start difference. First operand 520 states and 1743 transitions. Second operand has 43 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 42 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:44:35,518 WARN L233 SmtUtils]: Spent 9.21s on a formula simplification. DAG size of input: 109 DAG size of output: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:44:46,496 WARN L233 SmtUtils]: Spent 8.87s on a formula simplification. DAG size of input: 104 DAG size of output: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:44:57,454 WARN L233 SmtUtils]: Spent 8.42s on a formula simplification. DAG size of input: 99 DAG size of output: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:45:08,087 WARN L233 SmtUtils]: Spent 8.29s on a formula simplification. DAG size of input: 78 DAG size of output: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:45:36,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-23 14:45:41,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-23 14:45:43,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-23 14:45:46,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:46,767 INFO L93 Difference]: Finished difference Result 1449 states and 3907 transitions. [2022-11-23 14:45:46,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-23 14:45:46,768 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 42 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-23 14:45:46,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:46,772 INFO L225 Difference]: With dead ends: 1449 [2022-11-23 14:45:46,773 INFO L226 Difference]: Without dead ends: 1449 [2022-11-23 14:45:46,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1925 ImplicationChecksByTransitivity, 86.7s TimeCoverageRelationStatistics Valid=1201, Invalid=5938, Unknown=1, NotChecked=0, Total=7140 [2022-11-23 14:45:46,775 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1807 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2653 mSolverCounterSat, 135 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1807 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 2653 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:46,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1807 Valid, 0 Invalid, 2790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 2653 Invalid, 2 Unknown, 0 Unchecked, 24.4s Time] [2022-11-23 14:45:46,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2022-11-23 14:45:46,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 600. [2022-11-23 14:45:46,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 589 states have (on average 3.497453310696095) internal successors, (2060), 599 states have internal predecessors, (2060), 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 14:45:46,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 2060 transitions. [2022-11-23 14:45:46,797 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 2060 transitions. Word has length 12 [2022-11-23 14:45:46,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:46,797 INFO L495 AbstractCegarLoop]: Abstraction has 600 states and 2060 transitions. [2022-11-23 14:45:46,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 42 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:46,798 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 2060 transitions. [2022-11-23 14:45:46,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 14:45:46,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:46,799 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:45:46,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-11-23 14:45:47,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (50)] Ended with exit code 0 [2022-11-23 14:45:47,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-23 14:45:47,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:45:47,406 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 14:45:47,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:47,407 INFO L85 PathProgramCache]: Analyzing trace with hash 693368008, now seen corresponding path program 1 times [2022-11-23 14:45:47,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:45:47,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1402061091] [2022-11-23 14:45:47,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:47,407 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:45:47,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:45:47,408 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:45:47,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-23 14:45:47,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:47,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 14:45:47,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:45:47,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:47,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:45:47,637 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:45:47,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1402061091] [2022-11-23 14:45:47,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1402061091] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:45:47,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:45:47,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:45:47,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838262584] [2022-11-23 14:45:47,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:45:47,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:45:47,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:45:47,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:45:47,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:45:47,639 INFO L87 Difference]: Start difference. First operand 600 states and 2060 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:47,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:47,857 INFO L93 Difference]: Finished difference Result 651 states and 2164 transitions. [2022-11-23 14:45:47,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:45:47,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-23 14:45:47,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:47,860 INFO L225 Difference]: With dead ends: 651 [2022-11-23 14:45:47,860 INFO L226 Difference]: Without dead ends: 633 [2022-11-23 14:45:47,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 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 14:45:47,860 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 6 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:47,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 0 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:45:47,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-11-23 14:45:47,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 631. [2022-11-23 14:45:47,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 620 states have (on average 3.359677419354839) internal successors, (2083), 630 states have internal predecessors, (2083), 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 14:45:47,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 2083 transitions. [2022-11-23 14:45:47,874 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 2083 transitions. Word has length 13 [2022-11-23 14:45:47,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:47,874 INFO L495 AbstractCegarLoop]: Abstraction has 631 states and 2083 transitions. [2022-11-23 14:45:47,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:47,875 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 2083 transitions. [2022-11-23 14:45:47,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 14:45:47,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:47,876 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-23 14:45:47,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Ended with exit code 0 [2022-11-23 14:45:48,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:45:48,088 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 14:45:48,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:48,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1613899861, now seen corresponding path program 3 times [2022-11-23 14:45:48,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:45:48,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [346015992] [2022-11-23 14:45:48,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:45:48,089 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:45:48,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:45:48,090 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:45:48,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-23 14:45:48,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 14:45:48,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:45:48,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 14:45:48,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:45:48,445 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 14:45:48,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:45:48,740 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:45:48,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:45:49,362 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:45:49,362 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:45:49,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [346015992] [2022-11-23 14:45:49,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [346015992] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:45:49,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1533863186] [2022-11-23 14:45:49,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:45:49,363 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:45:49,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:45:49,364 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:45:49,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2022-11-23 14:45:49,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 14:45:49,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:45:49,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 14:45:49,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:45:50,004 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 14:45:50,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:45:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:45:50,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:45:51,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:45:51,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1533863186] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:45:51,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106375765] [2022-11-23 14:45:51,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:45:51,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:45:51,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:45:51,827 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:45:51,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-23 14:45:52,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 14:45:52,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:45:52,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 14:45:52,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:45:52,696 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:45:52,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:45:53,622 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-23 14:45:53,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106375765] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:45:53,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:45:53,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 6, 6] total 35 [2022-11-23 14:45:53,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888100043] [2022-11-23 14:45:53,623 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:45:53,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-23 14:45:53,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:45:53,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-23 14:45:53,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2022-11-23 14:45:53,625 INFO L87 Difference]: Start difference. First operand 631 states and 2083 transitions. Second operand has 37 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 36 states have internal predecessors, (66), 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 14:46:09,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:46:09,884 INFO L93 Difference]: Finished difference Result 1540 states and 4019 transitions. [2022-11-23 14:46:09,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-23 14:46:09,885 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 36 states have internal predecessors, (66), 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 13 [2022-11-23 14:46:09,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:46:09,889 INFO L225 Difference]: With dead ends: 1540 [2022-11-23 14:46:09,889 INFO L226 Difference]: Without dead ends: 1540 [2022-11-23 14:46:09,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=1057, Invalid=4949, Unknown=0, NotChecked=0, Total=6006 [2022-11-23 14:46:09,892 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2511 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2571 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2511 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 2571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:46:09,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2511 Valid, 0 Invalid, 2801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 2571 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2022-11-23 14:46:09,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2022-11-23 14:46:09,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 584. [2022-11-23 14:46:09,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 573 states have (on average 3.1116928446771377) internal successors, (1783), 583 states have internal predecessors, (1783), 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 14:46:09,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 1783 transitions. [2022-11-23 14:46:09,916 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 1783 transitions. Word has length 13 [2022-11-23 14:46:09,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:46:09,916 INFO L495 AbstractCegarLoop]: Abstraction has 584 states and 1783 transitions. [2022-11-23 14:46:09,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 36 states have internal predecessors, (66), 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 14:46:09,917 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 1783 transitions. [2022-11-23 14:46:09,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 14:46:09,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:46:09,918 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:46:09,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-11-23 14:46:10,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-23 14:46:10,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (54)] Forceful destruction successful, exit code 0 [2022-11-23 14:46:10,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt [2022-11-23 14:46:10,526 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 14:46:10,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:46:10,527 INFO L85 PathProgramCache]: Analyzing trace with hash -980216230, now seen corresponding path program 3 times [2022-11-23 14:46:10,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:46:10,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [647426524] [2022-11-23 14:46:10,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:46:10,527 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:46:10,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:46:10,528 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:46:10,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-23 14:46:10,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 14:46:10,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:46:10,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 14:46:10,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:46:10,886 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 14:46:10,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 14:46:10,964 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 14:46:10,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-23 14:46:11,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:46:11,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 14:46:11,094 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:46:11,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:46:11,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 14:46:11,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:46:12,586 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 14:46:12,586 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:46:12,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [647426524] [2022-11-23 14:46:12,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [647426524] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:46:12,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [640095413] [2022-11-23 14:46:12,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:46:12,587 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:46:12,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:46:12,589 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:46:12,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2022-11-23 14:46:13,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 14:46:13,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:46:13,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 14:46:13,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:46:13,080 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 14:46:13,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 14:46:13,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:46:13,594 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 14:46:13,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:46:14,403 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 14:46:14,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [640095413] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:46:14,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910558789] [2022-11-23 14:46:14,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:46:14,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:46:14,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:46:14,406 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:46:14,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-23 14:46:14,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 14:46:14,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:46:14,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 14:46:14,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:46:15,048 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 14:46:15,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:46:15,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 14:46:15,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910558789] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:46:15,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:46:15,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6, 6, 6, 6] total 24 [2022-11-23 14:46:15,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418933195] [2022-11-23 14:46:15,540 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:46:15,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-23 14:46:15,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:46:15,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-23 14:46:15,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-11-23 14:46:15,541 INFO L87 Difference]: Start difference. First operand 584 states and 1783 transitions. Second operand has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:46:22,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:46:22,515 INFO L93 Difference]: Finished difference Result 989 states and 2596 transitions. [2022-11-23 14:46:22,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-23 14:46:22,516 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-23 14:46:22,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:46:22,518 INFO L225 Difference]: With dead ends: 989 [2022-11-23 14:46:22,518 INFO L226 Difference]: Without dead ends: 989 [2022-11-23 14:46:22,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=316, Invalid=1406, Unknown=0, NotChecked=0, Total=1722 [2022-11-23 14:46:22,519 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 644 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:46:22,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [644 Valid, 0 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1217 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-23 14:46:22,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2022-11-23 14:46:22,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 548. [2022-11-23 14:46:22,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 537 states have (on average 3.1471135940409685) internal successors, (1690), 547 states have internal predecessors, (1690), 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 14:46:22,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1690 transitions. [2022-11-23 14:46:22,554 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1690 transitions. Word has length 14 [2022-11-23 14:46:22,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:46:22,555 INFO L495 AbstractCegarLoop]: Abstraction has 548 states and 1690 transitions. [2022-11-23 14:46:22,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:46:22,555 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1690 transitions. [2022-11-23 14:46:22,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 14:46:22,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:46:22,556 INFO L195 NwaCegarLoop]: trace histogram [12, 1, 1] [2022-11-23 14:46:22,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-11-23 14:46:22,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (57)] Ended with exit code 0 [2022-11-23 14:46:22,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-23 14:46:23,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:46:23,165 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 14:46:23,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:46:23,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1509721336, now seen corresponding path program 3 times [2022-11-23 14:46:23,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:46:23,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [663622669] [2022-11-23 14:46:23,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:46:23,166 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:46:23,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:46:23,167 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:46:23,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-23 14:46:23,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-23 14:46:23,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:46:23,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 14:46:23,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:46:23,544 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 14:46:23,544 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 14:46:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:46:24,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:46:29,044 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:46:29,044 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:46:29,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [663622669] [2022-11-23 14:46:29,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [663622669] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:46:29,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1718795147] [2022-11-23 14:46:29,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:46:29,044 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:46:29,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:46:29,045 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:46:29,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2022-11-23 14:46:30,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-23 14:46:30,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:46:30,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 14:46:30,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:46:30,447 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 14:46:30,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-23 14:46:30,678 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:46:30,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:46:31,372 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:46:31,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1718795147] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:46:31,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817839917] [2022-11-23 14:46:31,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:46:31,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:46:31,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:46:31,374 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:46:31,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-23 14:46:35,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-23 14:46:35,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:46:35,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 14:46:35,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:46:35,986 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 14:46:35,987 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 14:46:36,242 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:46:36,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:46:42,459 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:46:42,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817839917] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:46:42,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:46:42,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 38 [2022-11-23 14:46:42,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137900327] [2022-11-23 14:46:42,460 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:46:42,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-23 14:46:42,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:46:42,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-23 14:46:42,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=1135, Unknown=0, NotChecked=0, Total=1560 [2022-11-23 14:46:42,462 INFO L87 Difference]: Start difference. First operand 548 states and 1690 transitions. Second operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:46:59,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:01,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:03,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:05,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:07,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:09,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:11,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:13,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:15,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:17,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:19,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:21,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:23,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:25,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:27,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:29,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:31,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:33,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:35,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:37,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:47:39,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-23 14:48:00,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:48:00,085 INFO L93 Difference]: Finished difference Result 4119 states and 13038 transitions. [2022-11-23 14:48:00,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-23 14:48:00,088 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-23 14:48:00,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:48:00,102 INFO L225 Difference]: With dead ends: 4119 [2022-11-23 14:48:00,102 INFO L226 Difference]: Without dead ends: 4119 [2022-11-23 14:48:00,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=839, Invalid=1813, Unknown=0, NotChecked=0, Total=2652 [2022-11-23 14:48:00,103 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2516 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4073 mSolverCounterSat, 678 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2516 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 678 IncrementalHoareTripleChecker+Valid, 4073 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:48:00,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2516 Valid, 0 Invalid, 4771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [678 Valid, 4073 Invalid, 20 Unknown, 0 Unchecked, 53.6s Time] [2022-11-23 14:48:00,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4119 states. [2022-11-23 14:48:00,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4119 to 562. [2022-11-23 14:48:00,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 551 states have (on average 3.117967332123412) internal successors, (1718), 561 states have internal predecessors, (1718), 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 14:48:00,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 1718 transitions. [2022-11-23 14:48:00,147 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 1718 transitions. Word has length 14 [2022-11-23 14:48:00,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:48:00,147 INFO L495 AbstractCegarLoop]: Abstraction has 562 states and 1718 transitions. [2022-11-23 14:48:00,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:48:00,147 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 1718 transitions. [2022-11-23 14:48:00,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-23 14:48:00,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:48:00,149 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1] [2022-11-23 14:48:00,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (60)] Forceful destruction successful, exit code 0 [2022-11-23 14:48:00,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2022-11-23 14:48:00,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-11-23 14:48:00,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:48:00,755 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2022-11-23 14:48:00,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:48:00,756 INFO L85 PathProgramCache]: Analyzing trace with hash 852863179, now seen corresponding path program 4 times [2022-11-23 14:48:00,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-23 14:48:00,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [878492590] [2022-11-23 14:48:00,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:48:00,756 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-23 14:48:00,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat [2022-11-23 14:48:00,757 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-23 14:48:00,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-23 14:48:01,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:48:01,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:48:01,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 14:48:01,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:48:01,206 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 14:48:01,207 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 14:48:01,282 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 14:48:01,282 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 14:48:01,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:01,545 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 21 treesize of output 21 [2022-11-23 14:48:01,569 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:48:01,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:48:01,875 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 14:48:01,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:48:03,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 14:48:03,888 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-23 14:48:03,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [878492590] [2022-11-23 14:48:03,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [878492590] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:48:03,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1757262769] [2022-11-23 14:48:03,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:48:03,889 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-23 14:48:03,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 [2022-11-23 14:48:03,890 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-23 14:48:03,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2022-11-23 14:48:04,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:48:04,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:48:04,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-23 14:48:04,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:48:04,576 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 14:48:04,576 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 14:48:04,652 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-23 14:48:04,652 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 14:48:05,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:05,074 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 14 treesize of output 16 [2022-11-23 14:48:05,095 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-23 14:48:05,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-23 14:48:05,348 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 14:48:05,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:48:08,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 14:48:08,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1757262769] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:48:08,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946012592] [2022-11-23 14:48:08,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:48:08,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:48:08,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:48:08,450 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:48:08,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_286110f6-77d7-4dde-bdfe-6a520a3586ee/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-11-23 14:48:08,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:48:08,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:48:08,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-23 14:48:08,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:48:08,762 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-23 14:48:08,763 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 14:48:09,328 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-23 14:48:09,328 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 14:48:10,466 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:48:10,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:48:24,861 WARN L233 SmtUtils]: Spent 6.13s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:48:33,743 WARN L233 SmtUtils]: Spent 6.16s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:48:39,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:48:39,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946012592] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:48:39,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-23 14:48:39,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 8, 11, 12] total 40 [2022-11-23 14:48:39,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332888600] [2022-11-23 14:48:39,565 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-23 14:48:39,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-23 14:48:39,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-23 14:48:39,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-23 14:48:39,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1500, Unknown=1, NotChecked=0, Total=1722 [2022-11-23 14:48:39,567 INFO L87 Difference]: Start difference. First operand 562 states and 1718 transitions. Second operand has 42 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 41 states have internal predecessors, (60), 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 14:48:51,349 WARN L233 SmtUtils]: Spent 8.55s on a formula simplification. DAG size of input: 113 DAG size of output: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:49:29,625 WARN L233 SmtUtils]: Spent 36.56s on a formula simplification. DAG size of input: 102 DAG size of output: 99 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)