./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 24c46cfa0dbb54d68ea1c1d9e6e82d14a582b1d00782b6decedd8126f489ee67 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 05:03:58,122 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 05:03:58,124 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 05:03:58,139 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 05:03:58,140 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 05:03:58,140 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 05:03:58,141 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 05:03:58,143 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 05:03:58,144 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 05:03:58,144 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 05:03:58,145 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 05:03:58,146 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 05:03:58,146 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 05:03:58,147 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 05:03:58,148 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 05:03:58,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 05:03:58,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 05:03:58,150 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 05:03:58,151 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 05:03:58,152 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 05:03:58,153 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 05:03:58,154 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 05:03:58,155 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 05:03:58,156 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 05:03:58,158 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 05:03:58,158 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 05:03:58,158 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 05:03:58,159 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 05:03:58,159 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 05:03:58,160 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 05:03:58,160 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 05:03:58,161 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 05:03:58,162 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 05:03:58,162 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 05:03:58,163 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 05:03:58,163 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 05:03:58,164 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 05:03:58,164 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 05:03:58,164 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 05:03:58,165 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 05:03:58,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 05:03:58,166 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 05:03:58,183 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 05:03:58,183 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 05:03:58,183 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 05:03:58,183 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 05:03:58,184 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 05:03:58,184 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 05:03:58,184 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 05:03:58,184 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 05:03:58,184 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 05:03:58,184 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 05:03:58,185 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 05:03:58,185 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 05:03:58,185 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 05:03:58,185 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 05:03:58,185 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 05:03:58,185 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 05:03:58,185 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 05:03:58,185 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 05:03:58,186 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 05:03:58,186 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 05:03:58,186 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 05:03:58,186 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 05:03:58,186 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 05:03:58,187 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 05:03:58,187 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 05:03:58,187 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 05:03:58,187 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 05:03:58,187 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 05:03:58,187 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 05:03:58,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 05:03:58,187 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 05:03:58,188 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 05:03:58,188 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 05:03:58,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 05:03:58,188 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 05:03:58,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:03:58,188 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 05:03:58,188 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 05:03:58,188 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 05:03:58,189 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 05:03:58,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 05:03:58,189 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 05:03:58,189 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_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 24c46cfa0dbb54d68ea1c1d9e6e82d14a582b1d00782b6decedd8126f489ee67 [2022-12-14 05:03:58,355 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 05:03:58,374 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 05:03:58,377 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 05:03:58,378 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 05:03:58,378 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 05:03:58,379 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2022-12-14 05:04:01,018 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 05:04:01,176 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 05:04:01,176 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2022-12-14 05:04:01,183 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/data/bd3295871/876e6c0775794b0a851b510bddf3757d/FLAGa6eb8e3b8 [2022-12-14 05:04:01,197 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/data/bd3295871/876e6c0775794b0a851b510bddf3757d [2022-12-14 05:04:01,199 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 05:04:01,201 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 05:04:01,202 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 05:04:01,202 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 05:04:01,206 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 05:04:01,207 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:04:01" (1/1) ... [2022-12-14 05:04:01,208 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fcbf6f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:01, skipping insertion in model container [2022-12-14 05:04:01,208 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:04:01" (1/1) ... [2022-12-14 05:04:01,216 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 05:04:01,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:04:01,377 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:04:01,378 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:04:01,378 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:04:01,379 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:04:01,381 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:04:01,382 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:04:01,385 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:04:01,386 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:04:01,386 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:04:01,387 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:04:01,388 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:04:01,389 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:04:01,390 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:04:01,392 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:04:01,393 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:04:01,394 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:04:01,403 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_0756e597-3876-467c-a681-75b4b292edde/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c[3018,3031] [2022-12-14 05:04:01,412 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:04:01,423 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-12-14 05:04:01,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@9633257 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:01, skipping insertion in model container [2022-12-14 05:04:01,424 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 05:04:01,424 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 05:04:01,426 INFO L158 Benchmark]: Toolchain (without parser) took 224.39ms. Allocated memory is still 190.8MB. Free memory was 145.2MB in the beginning and 133.8MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 05:04:01,426 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 113.2MB. Free memory is still 83.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 05:04:01,427 INFO L158 Benchmark]: CACSL2BoogieTranslator took 222.09ms. Allocated memory is still 190.8MB. Free memory was 145.2MB in the beginning and 133.8MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 05:04:01,428 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 113.2MB. Free memory is still 83.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 222.09ms. Allocated memory is still 190.8MB. Free memory was 145.2MB in the beginning and 133.8MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 129]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 24c46cfa0dbb54d68ea1c1d9e6e82d14a582b1d00782b6decedd8126f489ee67 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 05:04:02,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 05:04:02,721 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 05:04:02,741 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 05:04:02,741 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 05:04:02,742 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 05:04:02,743 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 05:04:02,744 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 05:04:02,745 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 05:04:02,746 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 05:04:02,747 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 05:04:02,748 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 05:04:02,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 05:04:02,749 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 05:04:02,749 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 05:04:02,750 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 05:04:02,751 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 05:04:02,752 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 05:04:02,753 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 05:04:02,754 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 05:04:02,756 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 05:04:02,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 05:04:02,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 05:04:02,760 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 05:04:02,763 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 05:04:02,763 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 05:04:02,763 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 05:04:02,764 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 05:04:02,764 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 05:04:02,765 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 05:04:02,765 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 05:04:02,766 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 05:04:02,767 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 05:04:02,767 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 05:04:02,768 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 05:04:02,768 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 05:04:02,769 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 05:04:02,769 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 05:04:02,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 05:04:02,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 05:04:02,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 05:04:02,771 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 05:04:02,789 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 05:04:02,789 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 05:04:02,789 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 05:04:02,789 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 05:04:02,790 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 05:04:02,790 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 05:04:02,790 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 05:04:02,790 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 05:04:02,791 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 05:04:02,791 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 05:04:02,791 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 05:04:02,792 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 05:04:02,792 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 05:04:02,793 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 05:04:02,793 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 05:04:02,793 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 05:04:02,793 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 05:04:02,793 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 05:04:02,793 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 05:04:02,794 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 05:04:02,794 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 05:04:02,794 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 05:04:02,794 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 05:04:02,794 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 05:04:02,794 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 05:04:02,795 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 05:04:02,795 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 05:04:02,795 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 05:04:02,795 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 05:04:02,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 05:04:02,795 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 05:04:02,796 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 05:04:02,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:04:02,796 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 05:04:02,796 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 05:04:02,796 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 05:04:02,797 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 05:04:02,797 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 05:04:02,797 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 05:04:02,797 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_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 24c46cfa0dbb54d68ea1c1d9e6e82d14a582b1d00782b6decedd8126f489ee67 [2022-12-14 05:04:02,996 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 05:04:03,011 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 05:04:03,012 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 05:04:03,013 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 05:04:03,014 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 05:04:03,015 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2022-12-14 05:04:05,570 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 05:04:05,720 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 05:04:05,721 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2022-12-14 05:04:05,728 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/data/2cb6fc3f4/1b834282375a4108865f738f5e71b04c/FLAG35d5b78ba [2022-12-14 05:04:05,740 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/data/2cb6fc3f4/1b834282375a4108865f738f5e71b04c [2022-12-14 05:04:05,743 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 05:04:05,744 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 05:04:05,745 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 05:04:05,745 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 05:04:05,748 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 05:04:05,748 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:04:05" (1/1) ... [2022-12-14 05:04:05,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6878a875 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:05, skipping insertion in model container [2022-12-14 05:04:05,749 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:04:05" (1/1) ... [2022-12-14 05:04:05,754 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 05:04:05,772 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:04:05,894 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:04:05,895 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:04:05,895 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:04:05,895 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:04:05,897 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:04:05,898 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:04:05,900 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:04:05,901 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:04:05,901 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:04:05,901 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:04:05,902 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:04:05,903 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:04:05,904 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:04:05,905 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:04:05,906 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:04:05,906 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:04:05,912 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_0756e597-3876-467c-a681-75b4b292edde/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c[3018,3031] [2022-12-14 05:04:05,919 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:04:05,929 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 05:04:05,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:04:05,935 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:04:05,936 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:04:05,936 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:04:05,936 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:04:05,937 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:04:05,938 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:04:05,938 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:04:05,939 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:04:05,939 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:04:05,939 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:04:05,940 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:04:05,940 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:04:05,941 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:04:05,942 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:04:05,943 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:04:05,943 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:04:05,946 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_0756e597-3876-467c-a681-75b4b292edde/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c[3018,3031] [2022-12-14 05:04:05,949 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:04:05,952 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 05:04:05,962 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:04:05,962 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:04:05,963 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:04:05,963 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:04:05,963 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:04:05,964 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:04:05,964 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:04:05,965 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:04:05,965 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:04:05,965 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:04:05,965 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:04:05,966 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:04:05,967 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:04:05,967 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:04:05,968 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 05:04:05,968 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 05:04:05,971 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_0756e597-3876-467c-a681-75b4b292edde/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c[3018,3031] [2022-12-14 05:04:05,973 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:04:05,985 INFO L208 MainTranslator]: Completed translation [2022-12-14 05:04:05,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:05 WrapperNode [2022-12-14 05:04:05,986 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 05:04:05,987 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 05:04:05,987 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 05:04:05,987 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 05:04:05,992 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:05" (1/1) ... [2022-12-14 05:04:06,001 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:05" (1/1) ... [2022-12-14 05:04:06,016 INFO L138 Inliner]: procedures = 28, calls = 63, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 135 [2022-12-14 05:04:06,016 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 05:04:06,017 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 05:04:06,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 05:04:06,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 05:04:06,024 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:05" (1/1) ... [2022-12-14 05:04:06,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:05" (1/1) ... [2022-12-14 05:04:06,027 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:05" (1/1) ... [2022-12-14 05:04:06,027 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:05" (1/1) ... [2022-12-14 05:04:06,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:05" (1/1) ... [2022-12-14 05:04:06,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:05" (1/1) ... [2022-12-14 05:04:06,038 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:05" (1/1) ... [2022-12-14 05:04:06,039 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:05" (1/1) ... [2022-12-14 05:04:06,041 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 05:04:06,042 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 05:04:06,042 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 05:04:06,042 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 05:04:06,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:05" (1/1) ... [2022-12-14 05:04:06,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:04:06,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:04:06,068 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 05:04:06,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 05:04:06,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 05:04:06,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 05:04:06,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 05:04:06,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 05:04:06,103 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 05:04:06,103 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 05:04:06,103 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 05:04:06,104 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 05:04:06,104 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-14 05:04:06,104 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-14 05:04:06,104 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-12-14 05:04:06,104 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-12-14 05:04:06,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 05:04:06,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 05:04:06,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 05:04:06,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 05:04:06,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 05:04:06,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 05:04:06,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 05:04:06,106 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-14 05:04:06,215 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 05:04:06,217 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 05:04:06,690 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 05:04:06,783 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 05:04:06,784 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-14 05:04:06,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:04:06 BoogieIcfgContainer [2022-12-14 05:04:06,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 05:04:06,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 05:04:06,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 05:04:06,789 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 05:04:06,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:04:05" (1/3) ... [2022-12-14 05:04:06,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@211d1224 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:04:06, skipping insertion in model container [2022-12-14 05:04:06,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:04:05" (2/3) ... [2022-12-14 05:04:06,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@211d1224 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:04:06, skipping insertion in model container [2022-12-14 05:04:06,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:04:06" (3/3) ... [2022-12-14 05:04:06,791 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-inc.wvr.c [2022-12-14 05:04:06,804 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 05:04:06,804 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2022-12-14 05:04:06,804 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 05:04:06,871 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-14 05:04:06,904 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 05:04:06,919 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 210 transitions, 452 flow [2022-12-14 05:04:06,922 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 210 transitions, 452 flow [2022-12-14 05:04:06,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 210 transitions, 452 flow [2022-12-14 05:04:06,998 INFO L130 PetriNetUnfolder]: 12/206 cut-off events. [2022-12-14 05:04:06,999 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-14 05:04:07,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 206 events. 12/206 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 289 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 161. Up to 2 conditions per place. [2022-12-14 05:04:07,008 INFO L119 LiptonReduction]: Number of co-enabled transitions 4948 [2022-12-14 05:04:38,405 INFO L134 LiptonReduction]: Checked pairs total: 8653 [2022-12-14 05:04:38,406 INFO L136 LiptonReduction]: Total number of compositions: 203 [2022-12-14 05:04:38,411 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 82 places, 73 transitions, 178 flow [2022-12-14 05:04:38,808 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 12050 states, 10104 states have (on average 4.84986144101346) internal successors, (49003), 12049 states have internal predecessors, (49003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:04:38,826 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 05:04:38,831 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;@3e571e4d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 05:04:38,831 INFO L358 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2022-12-14 05:04:38,852 INFO L276 IsEmpty]: Start isEmpty. Operand has 12050 states, 10104 states have (on average 4.84986144101346) internal successors, (49003), 12049 states have internal predecessors, (49003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:04:38,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 05:04:38,856 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:04:38,857 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 05:04:38,857 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 05:04:38,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:04:38,862 INFO L85 PathProgramCache]: Analyzing trace with hash 27631, now seen corresponding path program 1 times [2022-12-14 05:04:38,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:04:38,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1976424974] [2022-12-14 05:04:38,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:04:38,872 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:04:38,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:04:38,874 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:04:38,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-14 05:04:38,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:04:38,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 05:04:38,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:04:39,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:04:39,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:04:39,038 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:04:39,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1976424974] [2022-12-14 05:04:39,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1976424974] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:04:39,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:04:39,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 05:04:39,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976220376] [2022-12-14 05:04:39,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:04:39,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:04:39,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:04:39,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:04:39,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:04:39,096 INFO L87 Difference]: Start difference. First operand has 12050 states, 10104 states have (on average 4.84986144101346) internal successors, (49003), 12049 states have internal predecessors, (49003), 0 states have call successors, (0), 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) [2022-12-14 05:04:39,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:04:39,482 INFO L93 Difference]: Finished difference Result 4508 states and 18077 transitions. [2022-12-14 05:04:39,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:04:39,484 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 [2022-12-14 05:04:39,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:04:39,522 INFO L225 Difference]: With dead ends: 4508 [2022-12-14 05:04:39,522 INFO L226 Difference]: Without dead ends: 4508 [2022-12-14 05:04:39,522 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 [2022-12-14 05:04:39,524 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:04:39,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 10 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:04:39,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4508 states. [2022-12-14 05:04:39,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4508 to 4506. [2022-12-14 05:04:39,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4506 states, 4029 states have (on average 4.486721270786796) internal successors, (18077), 4505 states have internal predecessors, (18077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:04:39,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4506 states to 4506 states and 18077 transitions. [2022-12-14 05:04:39,753 INFO L78 Accepts]: Start accepts. Automaton has 4506 states and 18077 transitions. Word has length 2 [2022-12-14 05:04:39,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:04:39,754 INFO L495 AbstractCegarLoop]: Abstraction has 4506 states and 18077 transitions. [2022-12-14 05:04:39,754 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) [2022-12-14 05:04:39,754 INFO L276 IsEmpty]: Start isEmpty. Operand 4506 states and 18077 transitions. [2022-12-14 05:04:39,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 05:04:39,754 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:04:39,754 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 05:04:39,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 05:04:39,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:04:39,956 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 05:04:39,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:04:39,957 INFO L85 PathProgramCache]: Analyzing trace with hash 27540, now seen corresponding path program 1 times [2022-12-14 05:04:39,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:04:39,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [174965939] [2022-12-14 05:04:39,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:04:39,958 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:04:39,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:04:39,960 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:04:39,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-14 05:04:40,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:04:40,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 05:04:40,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:04:40,293 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-14 05:04:40,293 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-12-14 05:04:40,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:04:40,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:04:40,323 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:04:40,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [174965939] [2022-12-14 05:04:40,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [174965939] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:04:40,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:04:40,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 05:04:40,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251180568] [2022-12-14 05:04:40,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:04:40,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:04:40,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:04:40,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:04:40,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:04:40,326 INFO L87 Difference]: Start difference. First operand 4506 states and 18077 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) [2022-12-14 05:04:40,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:04:40,560 INFO L93 Difference]: Finished difference Result 4505 states and 18075 transitions. [2022-12-14 05:04:40,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:04:40,560 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 [2022-12-14 05:04:40,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:04:40,584 INFO L225 Difference]: With dead ends: 4505 [2022-12-14 05:04:40,584 INFO L226 Difference]: Without dead ends: 4505 [2022-12-14 05:04:40,585 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 [2022-12-14 05:04:40,586 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:04:40,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 3 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:04:40,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4505 states. [2022-12-14 05:04:40,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4505 to 4505. [2022-12-14 05:04:40,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4505 states, 4029 states have (on average 4.486224869694714) internal successors, (18075), 4504 states have internal predecessors, (18075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:04:40,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4505 states to 4505 states and 18075 transitions. [2022-12-14 05:04:40,706 INFO L78 Accepts]: Start accepts. Automaton has 4505 states and 18075 transitions. Word has length 2 [2022-12-14 05:04:40,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:04:40,706 INFO L495 AbstractCegarLoop]: Abstraction has 4505 states and 18075 transitions. [2022-12-14 05:04:40,707 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) [2022-12-14 05:04:40,707 INFO L276 IsEmpty]: Start isEmpty. Operand 4505 states and 18075 transitions. [2022-12-14 05:04:40,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 05:04:40,707 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:04:40,707 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 05:04:40,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-14 05:04:40,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:04:40,909 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 05:04:40,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:04:40,910 INFO L85 PathProgramCache]: Analyzing trace with hash 27541, now seen corresponding path program 1 times [2022-12-14 05:04:40,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:04:40,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333815425] [2022-12-14 05:04:40,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:04:40,911 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:04:40,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:04:40,912 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:04:40,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-14 05:04:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:04:41,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 05:04:41,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:04:41,236 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:04:41,237 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:04:41,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:04:41,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:04:41,268 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:04:41,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [333815425] [2022-12-14 05:04:41,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [333815425] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:04:41,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:04:41,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 05:04:41,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742286299] [2022-12-14 05:04:41,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:04:41,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:04:41,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:04:41,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:04:41,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:04:41,270 INFO L87 Difference]: Start difference. First operand 4505 states and 18075 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) [2022-12-14 05:04:41,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:04:41,567 INFO L93 Difference]: Finished difference Result 4505 states and 18074 transitions. [2022-12-14 05:04:41,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:04:41,568 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 [2022-12-14 05:04:41,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:04:41,590 INFO L225 Difference]: With dead ends: 4505 [2022-12-14 05:04:41,590 INFO L226 Difference]: Without dead ends: 4505 [2022-12-14 05:04:41,590 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 [2022-12-14 05:04:41,591 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:04:41,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:04:41,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4505 states. [2022-12-14 05:04:41,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4505 to 4505. [2022-12-14 05:04:41,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4505 states, 4029 states have (on average 4.485976669148672) internal successors, (18074), 4504 states have internal predecessors, (18074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:04:41,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4505 states to 4505 states and 18074 transitions. [2022-12-14 05:04:41,691 INFO L78 Accepts]: Start accepts. Automaton has 4505 states and 18074 transitions. Word has length 2 [2022-12-14 05:04:41,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:04:41,691 INFO L495 AbstractCegarLoop]: Abstraction has 4505 states and 18074 transitions. [2022-12-14 05:04:41,691 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) [2022-12-14 05:04:41,691 INFO L276 IsEmpty]: Start isEmpty. Operand 4505 states and 18074 transitions. [2022-12-14 05:04:41,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 05:04:41,691 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:04:41,692 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 05:04:41,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-14 05:04:41,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:04:41,893 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 05:04:41,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:04:41,894 INFO L85 PathProgramCache]: Analyzing trace with hash 856664, now seen corresponding path program 1 times [2022-12-14 05:04:41,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:04:41,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [242790053] [2022-12-14 05:04:41,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:04:41,896 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:04:41,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:04:41,898 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:04:41,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-14 05:04:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:04:42,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 05:04:42,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:04:42,155 INFO L321 Elim1Store]: treesize reduction 210, result has 13.6 percent of original size [2022-12-14 05:04:42,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 73 [2022-12-14 05:04:42,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:04:42,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:04:42,237 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:04:42,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [242790053] [2022-12-14 05:04:42,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [242790053] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:04:42,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:04:42,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 05:04:42,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139692320] [2022-12-14 05:04:42,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:04:42,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:04:42,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:04:42,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:04:42,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:04:42,239 INFO L87 Difference]: Start difference. First operand 4505 states and 18074 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) [2022-12-14 05:04:42,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:04:42,501 INFO L93 Difference]: Finished difference Result 3864 states and 15193 transitions. [2022-12-14 05:04:42,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:04:42,502 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 [2022-12-14 05:04:42,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:04:42,534 INFO L225 Difference]: With dead ends: 3864 [2022-12-14 05:04:42,534 INFO L226 Difference]: Without dead ends: 3864 [2022-12-14 05:04:42,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:04:42,535 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 54 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:04:42,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 3 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:04:42,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3864 states. [2022-12-14 05:04:42,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3864 to 3864. [2022-12-14 05:04:42,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3864 states, 3464 states have (on average 4.3859699769053115) internal successors, (15193), 3863 states have internal predecessors, (15193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:04:42,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3864 states to 3864 states and 15193 transitions. [2022-12-14 05:04:42,609 INFO L78 Accepts]: Start accepts. Automaton has 3864 states and 15193 transitions. Word has length 3 [2022-12-14 05:04:42,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:04:42,610 INFO L495 AbstractCegarLoop]: Abstraction has 3864 states and 15193 transitions. [2022-12-14 05:04:42,610 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) [2022-12-14 05:04:42,610 INFO L276 IsEmpty]: Start isEmpty. Operand 3864 states and 15193 transitions. [2022-12-14 05:04:42,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 05:04:42,610 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:04:42,610 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 05:04:42,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-14 05:04:42,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:04:42,811 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 05:04:42,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:04:42,812 INFO L85 PathProgramCache]: Analyzing trace with hash 856666, now seen corresponding path program 1 times [2022-12-14 05:04:42,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:04:42,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [271104572] [2022-12-14 05:04:42,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:04:42,813 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:04:42,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:04:42,815 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:04:42,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-14 05:04:42,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:04:42,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 05:04:42,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:04:42,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:04:42,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:04:42,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:04:42,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:04:42,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:04:42,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:04:43,099 INFO L321 Elim1Store]: treesize reduction 48, result has 43.5 percent of original size [2022-12-14 05:04:43,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 44 [2022-12-14 05:04:43,129 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-12-14 05:04:43,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2022-12-14 05:04:43,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:04:43,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:04:43,216 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:04:43,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [271104572] [2022-12-14 05:04:43,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [271104572] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:04:43,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:04:43,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 05:04:43,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197910380] [2022-12-14 05:04:43,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:04:43,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:04:43,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:04:43,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:04:43,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:04:43,217 INFO L87 Difference]: Start difference. First operand 3864 states and 15193 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) [2022-12-14 05:04:43,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:04:43,406 INFO L93 Difference]: Finished difference Result 3223 states and 12312 transitions. [2022-12-14 05:04:43,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:04:43,406 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 [2022-12-14 05:04:43,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:04:43,417 INFO L225 Difference]: With dead ends: 3223 [2022-12-14 05:04:43,417 INFO L226 Difference]: Without dead ends: 3223 [2022-12-14 05:04:43,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:04:43,419 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 52 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:04:43,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 3 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:04:43,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3223 states. [2022-12-14 05:04:43,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3223 to 3223. [2022-12-14 05:04:43,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3223 states, 2899 states have (on average 4.2469817178337355) internal successors, (12312), 3222 states have internal predecessors, (12312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:04:43,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3223 states to 3223 states and 12312 transitions. [2022-12-14 05:04:43,534 INFO L78 Accepts]: Start accepts. Automaton has 3223 states and 12312 transitions. Word has length 3 [2022-12-14 05:04:43,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:04:43,534 INFO L495 AbstractCegarLoop]: Abstraction has 3223 states and 12312 transitions. [2022-12-14 05:04:43,534 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) [2022-12-14 05:04:43,534 INFO L276 IsEmpty]: Start isEmpty. Operand 3223 states and 12312 transitions. [2022-12-14 05:04:43,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 05:04:43,535 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:04:43,535 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 05:04:43,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-12-14 05:04:43,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:04:43,736 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 05:04:43,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:04:43,736 INFO L85 PathProgramCache]: Analyzing trace with hash 856574, now seen corresponding path program 1 times [2022-12-14 05:04:43,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:04:43,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745425371] [2022-12-14 05:04:43,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:04:43,736 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:04:43,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:04:43,737 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:04:43,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-14 05:04:43,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:04:43,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 05:04:43,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:04:43,954 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:04:43,954 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:04:44,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:04:44,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:04:44,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:04:44,197 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:04:44,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745425371] [2022-12-14 05:04:44,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745425371] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:04:44,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1736490226] [2022-12-14 05:04:44,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:04:44,197 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:04:44,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:04:44,198 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:04:44,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-12-14 05:04:44,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:04:44,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 05:04:44,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:04:44,456 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:04:44,457 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:04:44,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:04:44,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:04:44,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:04:44,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1736490226] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:04:44,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999618164] [2022-12-14 05:04:44,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:04:44,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:04:44,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:04:44,545 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:04:44,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 05:04:44,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:04:44,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 05:04:44,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:04:44,790 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:04:44,791 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:04:44,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:04:44,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:04:44,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:04:44,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999618164] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:04:44,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:04:44,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-12-14 05:04:44,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217366605] [2022-12-14 05:04:44,956 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:04:44,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 05:04:44,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:04:44,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 05:04:44,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-14 05:04:44,957 INFO L87 Difference]: Start difference. First operand 3223 states and 12312 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) [2022-12-14 05:04:46,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:04:46,650 INFO L93 Difference]: Finished difference Result 9664 states and 36932 transitions. [2022-12-14 05:04:46,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 05:04:46,652 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 [2022-12-14 05:04:46,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:04:46,690 INFO L225 Difference]: With dead ends: 9664 [2022-12-14 05:04:46,690 INFO L226 Difference]: Without dead ends: 9664 [2022-12-14 05:04:46,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-12-14 05:04:46,691 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 305 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:04:46,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 12 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 05:04:46,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9664 states. [2022-12-14 05:04:46,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9664 to 3226. [2022-12-14 05:04:46,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3226 states, 2902 states have (on average 4.244658855961406) internal successors, (12318), 3225 states have internal predecessors, (12318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:04:46,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3226 states to 3226 states and 12318 transitions. [2022-12-14 05:04:46,846 INFO L78 Accepts]: Start accepts. Automaton has 3226 states and 12318 transitions. Word has length 3 [2022-12-14 05:04:46,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:04:46,847 INFO L495 AbstractCegarLoop]: Abstraction has 3226 states and 12318 transitions. [2022-12-14 05:04:46,847 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) [2022-12-14 05:04:46,847 INFO L276 IsEmpty]: Start isEmpty. Operand 3226 states and 12318 transitions. [2022-12-14 05:04:46,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 05:04:46,847 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:04:46,847 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 05:04:46,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-14 05:04:47,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2022-12-14 05:04:47,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 05:04:47,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:04:47,451 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 05:04:47,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:04:47,452 INFO L85 PathProgramCache]: Analyzing trace with hash 823275243, now seen corresponding path program 1 times [2022-12-14 05:04:47,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:04:47,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [4062375] [2022-12-14 05:04:47,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:04:47,454 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:04:47,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:04:47,456 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:04:47,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-14 05:04:47,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:04:47,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 05:04:47,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:04:47,638 INFO L321 Elim1Store]: treesize reduction 190, result has 14.8 percent of original size [2022-12-14 05:04:47,638 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 7 case distinctions, treesize of input 49 treesize of output 66 [2022-12-14 05:04:47,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:04:47,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:04:47,739 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:04:47,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [4062375] [2022-12-14 05:04:47,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [4062375] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:04:47,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:04:47,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 05:04:47,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796723249] [2022-12-14 05:04:47,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:04:47,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:04:47,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:04:47,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:04:47,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:04:47,740 INFO L87 Difference]: Start difference. First operand 3226 states and 12318 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) [2022-12-14 05:04:47,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:04:47,915 INFO L93 Difference]: Finished difference Result 3138 states and 12022 transitions. [2022-12-14 05:04:47,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:04:47,915 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 [2022-12-14 05:04:47,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:04:47,926 INFO L225 Difference]: With dead ends: 3138 [2022-12-14 05:04:47,926 INFO L226 Difference]: Without dead ends: 3138 [2022-12-14 05:04:47,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:04:47,927 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 48 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:04:47,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 3 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:04:47,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3138 states. [2022-12-14 05:04:47,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3138 to 3138. [2022-12-14 05:04:47,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3138 states, 2834 states have (on average 4.242060691601976) internal successors, (12022), 3137 states have internal predecessors, (12022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:04:48,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3138 states to 3138 states and 12022 transitions. [2022-12-14 05:04:48,007 INFO L78 Accepts]: Start accepts. Automaton has 3138 states and 12022 transitions. Word has length 5 [2022-12-14 05:04:48,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:04:48,007 INFO L495 AbstractCegarLoop]: Abstraction has 3138 states and 12022 transitions. [2022-12-14 05:04:48,007 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) [2022-12-14 05:04:48,007 INFO L276 IsEmpty]: Start isEmpty. Operand 3138 states and 12022 transitions. [2022-12-14 05:04:48,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 05:04:48,008 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:04:48,008 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 05:04:48,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-14 05:04:48,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:04:48,209 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 05:04:48,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:04:48,211 INFO L85 PathProgramCache]: Analyzing trace with hash 823275005, now seen corresponding path program 1 times [2022-12-14 05:04:48,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:04:48,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [655521298] [2022-12-14 05:04:48,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:04:48,213 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:04:48,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:04:48,216 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:04:48,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-14 05:04:48,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:04:48,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 05:04:48,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:04:48,460 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-14 05:04:48,460 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-12-14 05:04:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:04:48,479 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:04:48,479 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:04:48,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [655521298] [2022-12-14 05:04:48,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [655521298] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:04:48,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:04:48,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 05:04:48,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936947082] [2022-12-14 05:04:48,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:04:48,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:04:48,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:04:48,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:04:48,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:04:48,481 INFO L87 Difference]: Start difference. First operand 3138 states and 12022 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) [2022-12-14 05:04:48,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:04:48,639 INFO L93 Difference]: Finished difference Result 1508 states and 5686 transitions. [2022-12-14 05:04:48,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:04:48,640 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 [2022-12-14 05:04:48,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:04:48,645 INFO L225 Difference]: With dead ends: 1508 [2022-12-14 05:04:48,645 INFO L226 Difference]: Without dead ends: 1508 [2022-12-14 05:04:48,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:04:48,645 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 87 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:04:48,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 1 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:04:48,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2022-12-14 05:04:48,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1508. [2022-12-14 05:04:48,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1508 states, 1420 states have (on average 4.004225352112676) internal successors, (5686), 1507 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:04:48,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1508 states to 1508 states and 5686 transitions. [2022-12-14 05:04:48,670 INFO L78 Accepts]: Start accepts. Automaton has 1508 states and 5686 transitions. Word has length 5 [2022-12-14 05:04:48,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:04:48,670 INFO L495 AbstractCegarLoop]: Abstraction has 1508 states and 5686 transitions. [2022-12-14 05:04:48,670 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) [2022-12-14 05:04:48,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1508 states and 5686 transitions. [2022-12-14 05:04:48,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 05:04:48,671 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:04:48,671 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 05:04:48,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-12-14 05:04:48,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:04:48,873 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 05:04:48,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:04:48,874 INFO L85 PathProgramCache]: Analyzing trace with hash 823275245, now seen corresponding path program 1 times [2022-12-14 05:04:48,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:04:48,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1944365957] [2022-12-14 05:04:48,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:04:48,875 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:04:48,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:04:48,878 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:04:48,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-14 05:04:49,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:04:49,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 05:04:49,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:04:49,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:04:49,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:04:49,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:04:49,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:04:49,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:04:49,291 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2022-12-14 05:04:49,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-12-14 05:04:49,314 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-14 05:04:49,314 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 31 treesize of output 27 [2022-12-14 05:04:49,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:04:49,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:04:49,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:04:49,885 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:04:49,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1944365957] [2022-12-14 05:04:49,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1944365957] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:04:49,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1061776386] [2022-12-14 05:04:49,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:04:49,885 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:04:49,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:04:49,886 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:04:49,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-12-14 05:04:50,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:04:50,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 05:04:50,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:04:50,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:04:50,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:04:50,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:04:50,185 INFO L321 Elim1Store]: treesize reduction 98, result has 25.2 percent of original size [2022-12-14 05:04:50,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 43 [2022-12-14 05:04:50,199 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 26 treesize of output 24 [2022-12-14 05:04:50,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:04:50,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:04:50,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1061776386] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:04:50,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 05:04:50,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-12-14 05:04:50,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467295904] [2022-12-14 05:04:50,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:04:50,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:04:50,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:04:50,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:04:50,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:04:50,349 INFO L87 Difference]: Start difference. First operand 1508 states and 5686 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) [2022-12-14 05:04:50,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:04:50,513 INFO L93 Difference]: Finished difference Result 1454 states and 5506 transitions. [2022-12-14 05:04:50,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:04:50,514 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 [2022-12-14 05:04:50,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:04:50,517 INFO L225 Difference]: With dead ends: 1454 [2022-12-14 05:04:50,517 INFO L226 Difference]: Without dead ends: 1454 [2022-12-14 05:04:50,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:04:50,518 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:04:50,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:04:50,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2022-12-14 05:04:50,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1454. [2022-12-14 05:04:50,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 1375 states have (on average 4.004363636363636) internal successors, (5506), 1453 states have internal predecessors, (5506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:04:50,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 5506 transitions. [2022-12-14 05:04:50,541 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 5506 transitions. Word has length 5 [2022-12-14 05:04:50,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:04:50,542 INFO L495 AbstractCegarLoop]: Abstraction has 1454 states and 5506 transitions. [2022-12-14 05:04:50,542 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) [2022-12-14 05:04:50,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 5506 transitions. [2022-12-14 05:04:50,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 05:04:50,542 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:04:50,542 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 05:04:50,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-12-14 05:04:50,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2022-12-14 05:04:50,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 05:04:50,944 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 05:04:50,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:04:50,945 INFO L85 PathProgramCache]: Analyzing trace with hash 823275006, now seen corresponding path program 1 times [2022-12-14 05:04:50,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:04:50,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [931226349] [2022-12-14 05:04:50,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:04:50,946 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:04:50,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:04:50,947 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:04:50,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-14 05:04:51,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:04:51,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 05:04:51,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:04:51,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:04:51,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:04:51,132 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 25 treesize of output 21 [2022-12-14 05:04:51,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:04:51,177 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:04:51,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [931226349] [2022-12-14 05:04:51,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [931226349] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:04:51,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1853088297] [2022-12-14 05:04:51,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:04:51,178 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:04:51,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:04:51,179 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:04:51,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-12-14 05:04:51,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:04:51,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 05:04:51,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:04:51,447 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:04:51,448 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:04:51,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:04:51,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:04:51,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:04:51,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1853088297] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:04:51,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937695922] [2022-12-14 05:04:51,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:04:51,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:04:51,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:04:51,795 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:04:51,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 05:04:51,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:04:51,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 05:04:51,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:04:52,011 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:04:52,012 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:04:52,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:04:52,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:04:52,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:04:52,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937695922] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:04:52,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:04:52,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 12 [2022-12-14 05:04:52,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299429797] [2022-12-14 05:04:52,136 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:04:52,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 05:04:52,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:04:52,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 05:04:52,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 05:04:52,136 INFO L87 Difference]: Start difference. First operand 1454 states and 5506 transitions. Second operand has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:04:52,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:04:52,978 INFO L93 Difference]: Finished difference Result 3106 states and 11696 transitions. [2022-12-14 05:04:52,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 05:04:52,979 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 05:04:52,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:04:52,987 INFO L225 Difference]: With dead ends: 3106 [2022-12-14 05:04:52,987 INFO L226 Difference]: Without dead ends: 3106 [2022-12-14 05:04:52,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-12-14 05:04:52,987 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 470 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:04:52,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 6 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 05:04:52,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3106 states. [2022-12-14 05:04:53,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3106 to 1040. [2022-12-14 05:04:53,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1001 states have (on average 3.902097902097902) internal successors, (3906), 1039 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:04:53,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 3906 transitions. [2022-12-14 05:04:53,014 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 3906 transitions. Word has length 5 [2022-12-14 05:04:53,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:04:53,015 INFO L495 AbstractCegarLoop]: Abstraction has 1040 states and 3906 transitions. [2022-12-14 05:04:53,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:04:53,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 3906 transitions. [2022-12-14 05:04:53,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 05:04:53,015 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:04:53,015 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 05:04:53,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-12-14 05:04:53,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-14 05:04:53,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-12-14 05:04:53,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 05:04:53,618 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 05:04:53,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:04:53,618 INFO L85 PathProgramCache]: Analyzing trace with hash -248824363, now seen corresponding path program 2 times [2022-12-14 05:04:53,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:04:53,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078967991] [2022-12-14 05:04:53,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:04:53,619 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:04:53,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:04:53,620 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:04:53,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-14 05:04:53,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 05:04:53,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:04:53,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 05:04:53,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:04:53,848 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:04:53,848 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:04:53,954 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:04:53,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:04:54,421 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:04:54,421 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:04:54,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078967991] [2022-12-14 05:04:54,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1078967991] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:04:54,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [732905107] [2022-12-14 05:04:54,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:04:54,421 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:04:54,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:04:54,422 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:04:54,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-12-14 05:04:54,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 05:04:54,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:04:54,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 05:04:54,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:04:54,777 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:04:54,777 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:04:54,940 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:04:54,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:04:55,702 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:04:55,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [732905107] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:04:55,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557553509] [2022-12-14 05:04:55,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:04:55,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:04:55,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:04:55,704 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:04:55,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 05:04:55,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 05:04:55,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:04:55,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 05:04:55,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:04:55,973 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:04:55,973 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:04:56,040 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:04:56,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:04:56,183 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:04:56,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557553509] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:04:56,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:04:56,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 19 [2022-12-14 05:04:56,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680236415] [2022-12-14 05:04:56,183 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:04:56,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 05:04:56,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:04:56,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 05:04:56,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2022-12-14 05:04:56,185 INFO L87 Difference]: Start difference. First operand 1040 states and 3906 transitions. Second operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:05:01,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:05:01,070 INFO L93 Difference]: Finished difference Result 9310 states and 35078 transitions. [2022-12-14 05:05:01,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 05:05:01,071 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 05:05:01,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:05:01,096 INFO L225 Difference]: With dead ends: 9310 [2022-12-14 05:05:01,096 INFO L226 Difference]: Without dead ends: 9310 [2022-12-14 05:05:01,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=216, Invalid=384, Unknown=0, NotChecked=0, Total=600 [2022-12-14 05:05:01,097 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1400 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1400 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-12-14 05:05:01,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1400 Valid, 33 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-12-14 05:05:01,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9310 states. [2022-12-14 05:05:01,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9310 to 1046. [2022-12-14 05:05:01,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1007 states have (on average 3.890764647467726) internal successors, (3918), 1045 states have internal predecessors, (3918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:05:01,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 3918 transitions. [2022-12-14 05:05:01,157 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 3918 transitions. Word has length 6 [2022-12-14 05:05:01,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:05:01,157 INFO L495 AbstractCegarLoop]: Abstraction has 1046 states and 3918 transitions. [2022-12-14 05:05:01,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:05:01,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 3918 transitions. [2022-12-14 05:05:01,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 05:05:01,158 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:05:01,158 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:05:01,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 05:05:01,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-14 05:05:01,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-12-14 05:05:01,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 05:05:01,760 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 05:05:01,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:05:01,761 INFO L85 PathProgramCache]: Analyzing trace with hash 893547065, now seen corresponding path program 1 times [2022-12-14 05:05:01,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:05:01,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1474672968] [2022-12-14 05:05:01,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:05:01,763 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:05:01,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:05:01,764 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:05:01,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-12-14 05:05:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:05:01,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 05:05:01,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:05:02,007 INFO L321 Elim1Store]: treesize reduction 180, result has 15.5 percent of original size [2022-12-14 05:05:02,007 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 5 case distinctions, treesize of input 36 treesize of output 55 [2022-12-14 05:05:02,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:05:02,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:05:02,031 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:05:02,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1474672968] [2022-12-14 05:05:02,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1474672968] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:05:02,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:05:02,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 05:05:02,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505899362] [2022-12-14 05:05:02,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:05:02,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:05:02,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:05:02,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:05:02,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:05:02,032 INFO L87 Difference]: Start difference. First operand 1046 states and 3918 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-12-14 05:05:02,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:05:02,149 INFO L93 Difference]: Finished difference Result 1013 states and 3823 transitions. [2022-12-14 05:05:02,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:05:02,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 [2022-12-14 05:05:02,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:05:02,151 INFO L225 Difference]: With dead ends: 1013 [2022-12-14 05:05:02,151 INFO L226 Difference]: Without dead ends: 1013 [2022-12-14 05:05:02,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:05:02,152 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:05:02,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 1 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:05:02,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-12-14 05:05:02,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1013. [2022-12-14 05:05:02,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 980 states have (on average 3.9010204081632653) internal successors, (3823), 1012 states have internal predecessors, (3823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:05:02,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 3823 transitions. [2022-12-14 05:05:02,166 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 3823 transitions. Word has length 7 [2022-12-14 05:05:02,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:05:02,166 INFO L495 AbstractCegarLoop]: Abstraction has 1013 states and 3823 transitions. [2022-12-14 05:05:02,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-12-14 05:05:02,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 3823 transitions. [2022-12-14 05:05:02,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 05:05:02,166 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:05:02,166 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:05:02,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-12-14 05:05:02,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:05:02,367 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 05:05:02,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:05:02,368 INFO L85 PathProgramCache]: Analyzing trace with hash 893547066, now seen corresponding path program 1 times [2022-12-14 05:05:02,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:05:02,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [770773910] [2022-12-14 05:05:02,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:05:02,370 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:05:02,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:05:02,373 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:05:02,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-14 05:05:02,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:05:02,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 05:05:02,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:05:02,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:05:02,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:05:02,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:05:02,637 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-12-14 05:05:02,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 53 [2022-12-14 05:05:02,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-14 05:05:02,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:05:02,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:05:03,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:05:03,051 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:05:03,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [770773910] [2022-12-14 05:05:03,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [770773910] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:05:03,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1639876657] [2022-12-14 05:05:03,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:05:03,052 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:05:03,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:05:03,053 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:05:03,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-12-14 05:05:03,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:05:03,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 05:05:03,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:05:03,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:05:03,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:05:03,365 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-12-14 05:05:03,365 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 3 case distinctions, treesize of input 18 treesize of output 53 [2022-12-14 05:05:03,386 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 88 treesize of output 84 [2022-12-14 05:05:03,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:05:03,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:05:03,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1639876657] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:05:03,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 05:05:03,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-12-14 05:05:03,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099841999] [2022-12-14 05:05:03,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:05:03,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:05:03,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:05:03,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:05:03,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:05:03,484 INFO L87 Difference]: Start difference. First operand 1013 states and 3823 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-12-14 05:05:03,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:05:03,604 INFO L93 Difference]: Finished difference Result 980 states and 3728 transitions. [2022-12-14 05:05:03,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:05:03,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 [2022-12-14 05:05:03,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:05:03,606 INFO L225 Difference]: With dead ends: 980 [2022-12-14 05:05:03,606 INFO L226 Difference]: Without dead ends: 980 [2022-12-14 05:05:03,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:05:03,607 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:05:03,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:05:03,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2022-12-14 05:05:03,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 980. [2022-12-14 05:05:03,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 953 states have (on average 3.911857292759706) internal successors, (3728), 979 states have internal predecessors, (3728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:05:03,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 3728 transitions. [2022-12-14 05:05:03,622 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 3728 transitions. Word has length 7 [2022-12-14 05:05:03,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:05:03,622 INFO L495 AbstractCegarLoop]: Abstraction has 980 states and 3728 transitions. [2022-12-14 05:05:03,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-12-14 05:05:03,622 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 3728 transitions. [2022-12-14 05:05:03,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 05:05:03,623 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:05:03,623 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:05:03,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2022-12-14 05:05:03,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-12-14 05:05:04,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:05:04,025 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 05:05:04,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:05:04,026 INFO L85 PathProgramCache]: Analyzing trace with hash 893322401, now seen corresponding path program 1 times [2022-12-14 05:05:04,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:05:04,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [86779654] [2022-12-14 05:05:04,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:05:04,027 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:05:04,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:05:04,030 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:05:04,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-12-14 05:05:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:05:04,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 05:05:04,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:05:04,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:05:04,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:05:04,201 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:05:04,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [86779654] [2022-12-14 05:05:04,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [86779654] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:05:04,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:05:04,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:05:04,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532484300] [2022-12-14 05:05:04,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:05:04,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:05:04,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:05:04,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:05:04,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:05:04,203 INFO L87 Difference]: Start difference. First operand 980 states and 3728 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2022-12-14 05:05:04,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:05:04,468 INFO L93 Difference]: Finished difference Result 1454 states and 5506 transitions. [2022-12-14 05:05:04,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:05:04,468 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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 [2022-12-14 05:05:04,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:05:04,472 INFO L225 Difference]: With dead ends: 1454 [2022-12-14 05:05:04,472 INFO L226 Difference]: Without dead ends: 1454 [2022-12-14 05:05:04,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:05:04,472 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 145 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:05:04,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 6 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:05:04,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2022-12-14 05:05:04,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1152. [2022-12-14 05:05:04,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1125 states have (on average 4.065777777777778) internal successors, (4574), 1151 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:05:04,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 4574 transitions. [2022-12-14 05:05:04,490 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 4574 transitions. Word has length 7 [2022-12-14 05:05:04,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:05:04,490 INFO L495 AbstractCegarLoop]: Abstraction has 1152 states and 4574 transitions. [2022-12-14 05:05:04,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2022-12-14 05:05:04,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 4574 transitions. [2022-12-14 05:05:04,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 05:05:04,491 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:05:04,491 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:05:04,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-12-14 05:05:04,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:05:04,692 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 05:05:04,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:05:04,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1923194635, now seen corresponding path program 1 times [2022-12-14 05:05:04,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:05:04,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [696541966] [2022-12-14 05:05:04,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:05:04,695 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:05:04,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:05:04,697 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:05:04,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-12-14 05:05:04,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:05:04,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 05:05:04,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:05:04,936 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:05:04,937 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:05:05,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:05:05,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:05:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:05:05,404 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:05:05,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [696541966] [2022-12-14 05:05:05,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [696541966] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:05:05,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [864933954] [2022-12-14 05:05:05,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:05:05,404 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:05:05,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:05:05,405 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:05:05,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-12-14 05:05:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:05:05,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 05:05:05,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:05:05,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:05:05,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:05:05,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:05:05,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [864933954] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:05:05,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358386624] [2022-12-14 05:05:05,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:05:05,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:05:05,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:05:05,884 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:05:05,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 05:05:05,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:05:05,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 05:05:05,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:05:06,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:05:06,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:05:06,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:05:06,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358386624] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:05:06,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:05:06,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 20 [2022-12-14 05:05:06,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853033611] [2022-12-14 05:05:06,112 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:05:06,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 05:05:06,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:05:06,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 05:05:06,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-12-14 05:05:06,113 INFO L87 Difference]: Start difference. First operand 1152 states and 4574 transitions. Second operand has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:05:09,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:05:09,333 INFO L93 Difference]: Finished difference Result 2913 states and 11309 transitions. [2022-12-14 05:05:09,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 05:05:09,334 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 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 [2022-12-14 05:05:09,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:05:09,341 INFO L225 Difference]: With dead ends: 2913 [2022-12-14 05:05:09,341 INFO L226 Difference]: Without dead ends: 2913 [2022-12-14 05:05:09,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=270, Invalid=920, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 05:05:09,342 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 773 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 05:05:09,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [773 Valid, 31 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 05:05:09,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2913 states. [2022-12-14 05:05:09,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2913 to 2357. [2022-12-14 05:05:09,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2357 states, 2330 states have (on average 4.136051502145922) internal successors, (9637), 2356 states have internal predecessors, (9637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:05:09,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2357 states to 2357 states and 9637 transitions. [2022-12-14 05:05:09,387 INFO L78 Accepts]: Start accepts. Automaton has 2357 states and 9637 transitions. Word has length 8 [2022-12-14 05:05:09,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:05:09,387 INFO L495 AbstractCegarLoop]: Abstraction has 2357 states and 9637 transitions. [2022-12-14 05:05:09,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:05:09,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2357 states and 9637 transitions. [2022-12-14 05:05:09,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 05:05:09,388 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:05:09,388 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:05:09,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-12-14 05:05:09,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2022-12-14 05:05:09,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-14 05:05:09,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:05:09,990 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 05:05:09,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:05:09,991 INFO L85 PathProgramCache]: Analyzing trace with hash -294907490, now seen corresponding path program 1 times [2022-12-14 05:05:09,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:05:09,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [605782787] [2022-12-14 05:05:09,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:05:09,993 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:05:09,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:05:09,996 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:05:09,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-12-14 05:05:10,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:05:10,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 05:05:10,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:05:10,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:05:10,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:05:10,138 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:05:10,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [605782787] [2022-12-14 05:05:10,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [605782787] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:05:10,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:05:10,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:05:10,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138983740] [2022-12-14 05:05:10,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:05:10,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:05:10,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:05:10,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:05:10,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:05:10,139 INFO L87 Difference]: Start difference. First operand 2357 states and 9637 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:05:10,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:05:10,442 INFO L93 Difference]: Finished difference Result 3347 states and 13683 transitions. [2022-12-14 05:05:10,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:05:10,443 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 05:05:10,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:05:10,452 INFO L225 Difference]: With dead ends: 3347 [2022-12-14 05:05:10,452 INFO L226 Difference]: Without dead ends: 3347 [2022-12-14 05:05:10,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:05:10,452 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 119 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:05:10,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 6 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:05:10,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3347 states. [2022-12-14 05:05:10,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3347 to 2815. [2022-12-14 05:05:10,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2815 states, 2788 states have (on average 4.3023672883787665) internal successors, (11995), 2814 states have internal predecessors, (11995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:05:10,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2815 states to 2815 states and 11995 transitions. [2022-12-14 05:05:10,501 INFO L78 Accepts]: Start accepts. Automaton has 2815 states and 11995 transitions. Word has length 9 [2022-12-14 05:05:10,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:05:10,501 INFO L495 AbstractCegarLoop]: Abstraction has 2815 states and 11995 transitions. [2022-12-14 05:05:10,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:05:10,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2815 states and 11995 transitions. [2022-12-14 05:05:10,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 05:05:10,502 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:05:10,502 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:05:10,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-12-14 05:05:10,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:05:10,702 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 05:05:10,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:05:10,703 INFO L85 PathProgramCache]: Analyzing trace with hash -294707579, now seen corresponding path program 1 times [2022-12-14 05:05:10,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:05:10,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1562447803] [2022-12-14 05:05:10,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:05:10,703 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:05:10,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:05:10,704 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:05:10,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-12-14 05:05:10,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:05:10,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 05:05:10,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:05:10,891 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2022-12-14 05:05:10,891 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 4 case distinctions, treesize of input 18 treesize of output 36 [2022-12-14 05:05:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:05:10,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:05:10,915 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:05:10,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1562447803] [2022-12-14 05:05:10,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1562447803] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:05:10,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:05:10,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 05:05:10,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867479110] [2022-12-14 05:05:10,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:05:10,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:05:10,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:05:10,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:05:10,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:05:10,916 INFO L87 Difference]: Start difference. First operand 2815 states and 11995 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:05:11,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:05:11,029 INFO L93 Difference]: Finished difference Result 2501 states and 10620 transitions. [2022-12-14 05:05:11,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:05:11,029 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 05:05:11,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:05:11,036 INFO L225 Difference]: With dead ends: 2501 [2022-12-14 05:05:11,036 INFO L226 Difference]: Without dead ends: 2501 [2022-12-14 05:05:11,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:05:11,036 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:05:11,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 1 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:05:11,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2501 states. [2022-12-14 05:05:11,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2501 to 2501. [2022-12-14 05:05:11,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2501 states, 2483 states have (on average 4.27708417237213) internal successors, (10620), 2500 states have internal predecessors, (10620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:05:11,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2501 states to 2501 states and 10620 transitions. [2022-12-14 05:05:11,077 INFO L78 Accepts]: Start accepts. Automaton has 2501 states and 10620 transitions. Word has length 9 [2022-12-14 05:05:11,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:05:11,077 INFO L495 AbstractCegarLoop]: Abstraction has 2501 states and 10620 transitions. [2022-12-14 05:05:11,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:05:11,077 INFO L276 IsEmpty]: Start isEmpty. Operand 2501 states and 10620 transitions. [2022-12-14 05:05:11,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 05:05:11,077 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:05:11,077 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:05:11,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-12-14 05:05:11,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:05:11,279 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 05:05:11,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:05:11,280 INFO L85 PathProgramCache]: Analyzing trace with hash -294707577, now seen corresponding path program 1 times [2022-12-14 05:05:11,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:05:11,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [131413321] [2022-12-14 05:05:11,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:05:11,280 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:05:11,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:05:11,281 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:05:11,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-12-14 05:05:11,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:05:11,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 05:05:11,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:05:11,547 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:05:11,547 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:05:11,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:05:11,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:05:11,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:05:11,926 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:05:11,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [131413321] [2022-12-14 05:05:11,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [131413321] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:05:11,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [352105115] [2022-12-14 05:05:11,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:05:11,926 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:05:11,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:05:11,927 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:05:11,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-12-14 05:05:12,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:05:12,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 05:05:12,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:05:12,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:05:12,265 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-12-14 05:05:12,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-12-14 05:05:12,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:05:12,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:05:12,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [352105115] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:05:12,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 05:05:12,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-12-14 05:05:12,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544738039] [2022-12-14 05:05:12,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:05:12,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:05:12,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:05:12,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:05:12,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:05:12,353 INFO L87 Difference]: Start difference. First operand 2501 states and 10620 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:05:12,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:05:12,483 INFO L93 Difference]: Finished difference Result 2187 states and 9245 transitions. [2022-12-14 05:05:12,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:05:12,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 05:05:12,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:05:12,489 INFO L225 Difference]: With dead ends: 2187 [2022-12-14 05:05:12,489 INFO L226 Difference]: Without dead ends: 2187 [2022-12-14 05:05:12,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:05:12,490 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:05:12,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 1 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:05:12,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2022-12-14 05:05:12,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2187. [2022-12-14 05:05:12,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2178 states have (on average 4.244719926538108) internal successors, (9245), 2186 states have internal predecessors, (9245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:05:12,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 9245 transitions. [2022-12-14 05:05:12,531 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 9245 transitions. Word has length 9 [2022-12-14 05:05:12,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:05:12,531 INFO L495 AbstractCegarLoop]: Abstraction has 2187 states and 9245 transitions. [2022-12-14 05:05:12,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:05:12,531 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 9245 transitions. [2022-12-14 05:05:12,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 05:05:12,532 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:05:12,532 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:05:12,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2022-12-14 05:05:12,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-12-14 05:05:12,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:05:12,934 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 05:05:12,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:05:12,936 INFO L85 PathProgramCache]: Analyzing trace with hash -552193166, now seen corresponding path program 1 times [2022-12-14 05:05:12,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:05:12,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1335910686] [2022-12-14 05:05:12,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:05:12,937 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:05:12,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:05:12,938 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:05:12,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-12-14 05:05:13,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:05:13,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 05:05:13,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:05:13,203 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:05:13,203 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:05:13,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:05:13,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:05:13,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:05:13,663 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:05:13,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1335910686] [2022-12-14 05:05:13,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1335910686] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:05:13,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1809742277] [2022-12-14 05:05:13,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:05:13,664 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:05:13,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:05:13,664 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:05:13,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-12-14 05:05:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:05:13,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 05:05:13,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:05:13,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:05:13,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:05:14,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:05:14,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1809742277] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:05:14,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925873105] [2022-12-14 05:05:14,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:05:14,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:05:14,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:05:14,161 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:05:14,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-14 05:05:14,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:05:14,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 05:05:14,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:05:14,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:05:14,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:05:14,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:05:14,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925873105] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:05:14,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:05:14,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 20 [2022-12-14 05:05:14,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699302203] [2022-12-14 05:05:14,396 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:05:14,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 05:05:14,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:05:14,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 05:05:14,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-12-14 05:05:14,397 INFO L87 Difference]: Start difference. First operand 2187 states and 9245 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2022-12-14 05:05:17,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:05:17,313 INFO L93 Difference]: Finished difference Result 3339 states and 13803 transitions. [2022-12-14 05:05:17,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 05:05:17,314 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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 10 [2022-12-14 05:05:17,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:05:17,321 INFO L225 Difference]: With dead ends: 3339 [2022-12-14 05:05:17,322 INFO L226 Difference]: Without dead ends: 3339 [2022-12-14 05:05:17,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=270, Invalid=920, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 05:05:17,322 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 537 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 05:05:17,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 44 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 05:05:17,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2022-12-14 05:05:17,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 3003. [2022-12-14 05:05:17,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 2994 states have (on average 4.280227120908483) internal successors, (12815), 3002 states have internal predecessors, (12815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:05:17,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 12815 transitions. [2022-12-14 05:05:17,371 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 12815 transitions. Word has length 10 [2022-12-14 05:05:17,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:05:17,371 INFO L495 AbstractCegarLoop]: Abstraction has 3003 states and 12815 transitions. [2022-12-14 05:05:17,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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) [2022-12-14 05:05:17,371 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 12815 transitions. [2022-12-14 05:05:17,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 05:05:17,372 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:05:17,372 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:05:17,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-12-14 05:05:17,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-14 05:05:17,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-12-14 05:05:17,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:05:17,974 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 05:05:17,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:05:17,975 INFO L85 PathProgramCache]: Analyzing trace with hash -546005764, now seen corresponding path program 1 times [2022-12-14 05:05:17,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:05:17,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1040526759] [2022-12-14 05:05:17,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:05:17,976 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:05:17,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:05:17,978 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:05:17,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-12-14 05:05:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:05:18,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 05:05:18,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:05:18,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:05:18,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:05:18,396 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 25 treesize of output 21 [2022-12-14 05:05:18,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:05:18,456 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:05:18,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1040526759] [2022-12-14 05:05:18,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1040526759] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:05:18,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [25337202] [2022-12-14 05:05:18,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:05:18,456 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:05:18,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:05:18,457 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:05:18,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-12-14 05:05:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:05:18,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 05:05:18,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:05:18,835 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:05:18,835 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:05:19,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:05:19,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:05:19,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:05:19,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [25337202] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:05:19,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965728141] [2022-12-14 05:05:19,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:05:19,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:05:19,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:05:19,318 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:05:19,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-14 05:05:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:05:19,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 05:05:19,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:05:19,577 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:05:19,577 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:05:19,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:05:19,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:05:19,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:05:19,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965728141] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:05:19,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:05:19,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 15 [2022-12-14 05:05:19,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533206559] [2022-12-14 05:05:19,798 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:05:19,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 05:05:19,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:05:19,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 05:05:19,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-12-14 05:05:19,798 INFO L87 Difference]: Start difference. First operand 3003 states and 12815 transitions. Second operand has 17 states, 16 states have (on average 2.1875) internal successors, (35), 16 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) [2022-12-14 05:05:21,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:05:21,138 INFO L93 Difference]: Finished difference Result 7828 states and 34182 transitions. [2022-12-14 05:05:21,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 05:05:21,138 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 16 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 10 [2022-12-14 05:05:21,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:05:21,159 INFO L225 Difference]: With dead ends: 7828 [2022-12-14 05:05:21,159 INFO L226 Difference]: Without dead ends: 7828 [2022-12-14 05:05:21,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=167, Invalid=483, Unknown=0, NotChecked=0, Total=650 [2022-12-14 05:05:21,160 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 508 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:05:21,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 6 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 05:05:21,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7828 states. [2022-12-14 05:05:21,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7828 to 3689. [2022-12-14 05:05:21,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3689 states, 3680 states have (on average 4.483967391304348) internal successors, (16501), 3688 states have internal predecessors, (16501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:05:21,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3689 states to 3689 states and 16501 transitions. [2022-12-14 05:05:21,251 INFO L78 Accepts]: Start accepts. Automaton has 3689 states and 16501 transitions. Word has length 10 [2022-12-14 05:05:21,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:05:21,251 INFO L495 AbstractCegarLoop]: Abstraction has 3689 states and 16501 transitions. [2022-12-14 05:05:21,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 16 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) [2022-12-14 05:05:21,251 INFO L276 IsEmpty]: Start isEmpty. Operand 3689 states and 16501 transitions. [2022-12-14 05:05:21,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 05:05:21,252 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:05:21,252 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:05:21,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2022-12-14 05:05:21,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-12-14 05:05:21,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-14 05:05:21,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:05:21,854 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 05:05:21,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:05:21,855 INFO L85 PathProgramCache]: Analyzing trace with hash 253694703, now seen corresponding path program 1 times [2022-12-14 05:05:21,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:05:21,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [374913566] [2022-12-14 05:05:21,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:05:21,857 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:05:21,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:05:21,859 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:05:21,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-12-14 05:05:22,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:05:22,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 05:05:22,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:05:22,193 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:05:22,193 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:05:22,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:05:22,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:05:22,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:05:22,695 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:05:22,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [374913566] [2022-12-14 05:05:22,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [374913566] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:05:22,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1649559890] [2022-12-14 05:05:22,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:05:22,696 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:05:22,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:05:22,697 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:05:22,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-12-14 05:05:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:05:22,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 05:05:22,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:05:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:05:22,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:05:23,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:05:23,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1649559890] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:05:23,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680740025] [2022-12-14 05:05:23,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:05:23,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:05:23,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:05:23,216 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:05:23,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-14 05:05:23,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:05:23,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 05:05:23,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:05:23,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:05:23,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:05:23,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:05:23,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680740025] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:05:23,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:05:23,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 20 [2022-12-14 05:05:23,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374329096] [2022-12-14 05:05:23,483 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:05:23,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 05:05:23,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:05:23,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 05:05:23,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-12-14 05:05:23,483 INFO L87 Difference]: Start difference. First operand 3689 states and 16501 transitions. Second operand has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:05:26,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:05:26,703 INFO L93 Difference]: Finished difference Result 5703 states and 25919 transitions. [2022-12-14 05:05:26,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 05:05:26,704 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 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 [2022-12-14 05:05:26,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:05:26,719 INFO L225 Difference]: With dead ends: 5703 [2022-12-14 05:05:26,719 INFO L226 Difference]: Without dead ends: 5703 [2022-12-14 05:05:26,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=270, Invalid=920, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 05:05:26,720 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 655 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 05:05:26,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [655 Valid, 6 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 05:05:26,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5703 states. [2022-12-14 05:05:26,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5703 to 5151. [2022-12-14 05:05:26,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5151 states, 5142 states have (on average 4.666472189809412) internal successors, (23995), 5150 states have internal predecessors, (23995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:05:26,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5151 states to 5151 states and 23995 transitions. [2022-12-14 05:05:26,811 INFO L78 Accepts]: Start accepts. Automaton has 5151 states and 23995 transitions. Word has length 11 [2022-12-14 05:05:26,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:05:26,811 INFO L495 AbstractCegarLoop]: Abstraction has 5151 states and 23995 transitions. [2022-12-14 05:05:26,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:05:26,811 INFO L276 IsEmpty]: Start isEmpty. Operand 5151 states and 23995 transitions. [2022-12-14 05:05:26,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 05:05:26,812 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:05:26,812 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 05:05:26,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-12-14 05:05:27,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-12-14 05:05:27,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-12-14 05:05:27,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:05:27,414 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 05:05:27,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:05:27,415 INFO L85 PathProgramCache]: Analyzing trace with hash -449524008, now seen corresponding path program 2 times [2022-12-14 05:05:27,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:05:27,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1874668050] [2022-12-14 05:05:27,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:05:27,416 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:05:27,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:05:27,417 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:05:27,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-12-14 05:05:27,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 05:05:27,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:05:27,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 05:05:27,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:05:27,782 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:05:27,782 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:05:28,057 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:05:28,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:05:29,351 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:05:29,351 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:05:29,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1874668050] [2022-12-14 05:05:29,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1874668050] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:05:29,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [683900589] [2022-12-14 05:05:29,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:05:29,351 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:05:29,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:05:29,352 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:05:29,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-12-14 05:05:29,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 05:05:29,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:05:29,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 05:05:29,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:05:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:05:29,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:05:30,644 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:05:30,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [683900589] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:05:30,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936738411] [2022-12-14 05:05:30,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:05:30,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:05:30,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:05:30,646 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:05:30,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-14 05:05:30,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 05:05:30,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:05:30,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 05:05:30,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:05:30,895 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:05:30,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:05:30,934 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:05:30,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936738411] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:05:30,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:05:30,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 33 [2022-12-14 05:05:30,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121709679] [2022-12-14 05:05:30,934 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:05:30,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 05:05:30,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:05:30,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 05:05:30,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=873, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 05:05:30,935 INFO L87 Difference]: Start difference. First operand 5151 states and 23995 transitions. Second operand has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:05:54,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:05:54,926 INFO L93 Difference]: Finished difference Result 17473 states and 78443 transitions. [2022-12-14 05:05:54,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 05:05:54,927 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 states have internal predecessors, (46), 0 states have call successors, (0), 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 [2022-12-14 05:05:54,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:05:54,981 INFO L225 Difference]: With dead ends: 17473 [2022-12-14 05:05:54,981 INFO L226 Difference]: Without dead ends: 17473 [2022-12-14 05:05:54,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=836, Invalid=2824, Unknown=0, NotChecked=0, Total=3660 [2022-12-14 05:05:54,982 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1573 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 3011 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1573 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 3033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 3011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:05:54,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1573 Valid, 155 Invalid, 3033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 3011 Invalid, 0 Unknown, 0 Unchecked, 14.5s Time] [2022-12-14 05:05:55,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17473 states. [2022-12-14 05:05:55,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17473 to 9209. [2022-12-14 05:05:55,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9209 states, 9200 states have (on average 4.707282608695652) internal successors, (43307), 9208 states have internal predecessors, (43307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:05:55,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9209 states to 9209 states and 43307 transitions. [2022-12-14 05:05:55,223 INFO L78 Accepts]: Start accepts. Automaton has 9209 states and 43307 transitions. Word has length 12 [2022-12-14 05:05:55,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:05:55,224 INFO L495 AbstractCegarLoop]: Abstraction has 9209 states and 43307 transitions. [2022-12-14 05:05:55,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:05:55,224 INFO L276 IsEmpty]: Start isEmpty. Operand 9209 states and 43307 transitions. [2022-12-14 05:05:55,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 05:05:55,225 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:05:55,225 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-12-14 05:05:55,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-12-14 05:05:55,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-12-14 05:05:55,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-12-14 05:05:55,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 05:05:55,827 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 05:05:55,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:05:55,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1395170613, now seen corresponding path program 3 times [2022-12-14 05:05:55,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:05:55,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [456715726] [2022-12-14 05:05:55,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:05:55,830 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:05:55,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:05:55,831 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:05:55,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-12-14 05:05:56,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 05:05:56,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:05:56,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 05:05:56,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:05:56,199 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:05:56,199 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:05:56,488 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:05:56,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:05:58,851 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:05:58,851 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:05:58,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [456715726] [2022-12-14 05:05:58,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [456715726] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:05:58,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [847670916] [2022-12-14 05:05:58,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:05:58,852 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:05:58,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:05:58,852 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:05:58,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-12-14 05:05:59,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 05:05:59,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:05:59,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 05:05:59,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:05:59,736 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:05:59,736 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:06:00,157 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:06:00,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:06:00,462 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:06:00,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [847670916] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:06:00,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583990132] [2022-12-14 05:06:00,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:06:00,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:06:00,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:06:00,463 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:06:00,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-14 05:06:02,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 05:06:02,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:06:02,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 05:06:02,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:06:02,696 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:06:02,696 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:06:02,791 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:06:02,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:06:03,101 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:06:03,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583990132] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:06:03,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:06:03,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 32 [2022-12-14 05:06:03,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558878968] [2022-12-14 05:06:03,101 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:06:03,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 05:06:03,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:06:03,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 05:06:03,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 05:06:03,102 INFO L87 Difference]: Start difference. First operand 9209 states and 43307 transitions. Second operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 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) [2022-12-14 05:06:25,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:06:25,024 INFO L93 Difference]: Finished difference Result 88688 states and 433062 transitions. [2022-12-14 05:06:25,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 05:06:25,025 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 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 12 [2022-12-14 05:06:25,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:06:25,552 INFO L225 Difference]: With dead ends: 88688 [2022-12-14 05:06:25,552 INFO L226 Difference]: Without dead ends: 88688 [2022-12-14 05:06:25,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=646, Invalid=1246, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 05:06:25,553 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 4569 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 5296 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4569 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 5298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:06:25,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4569 Valid, 166 Invalid, 5298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5296 Invalid, 0 Unknown, 0 Unchecked, 11.0s Time] [2022-12-14 05:06:25,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88688 states. [2022-12-14 05:06:26,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88688 to 9221. [2022-12-14 05:06:26,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9221 states, 9212 states have (on average 4.703755970473296) internal successors, (43331), 9220 states have internal predecessors, (43331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:06:26,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9221 states to 9221 states and 43331 transitions. [2022-12-14 05:06:26,572 INFO L78 Accepts]: Start accepts. Automaton has 9221 states and 43331 transitions. Word has length 12 [2022-12-14 05:06:26,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:06:26,572 INFO L495 AbstractCegarLoop]: Abstraction has 9221 states and 43331 transitions. [2022-12-14 05:06:26,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 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) [2022-12-14 05:06:26,572 INFO L276 IsEmpty]: Start isEmpty. Operand 9221 states and 43331 transitions. [2022-12-14 05:06:26,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 05:06:26,574 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:06:26,574 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:06:26,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-12-14 05:06:26,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-12-14 05:06:26,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 0 [2022-12-14 05:06:27,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 05:06:27,176 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 05:06:27,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:06:27,177 INFO L85 PathProgramCache]: Analyzing trace with hash -228830059, now seen corresponding path program 2 times [2022-12-14 05:06:27,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:06:27,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811387897] [2022-12-14 05:06:27,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:06:27,178 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:06:27,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:06:27,179 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:06:27,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-12-14 05:06:27,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 05:06:27,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:06:27,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 05:06:27,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:06:27,547 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:06:27,547 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:06:27,793 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:06:27,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:06:29,079 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:06:29,079 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:06:29,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811387897] [2022-12-14 05:06:29,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811387897] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:06:29,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [648294028] [2022-12-14 05:06:29,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:06:29,080 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:06:29,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:06:29,081 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:06:29,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-12-14 05:06:29,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 05:06:29,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:06:29,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 05:06:29,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:06:29,741 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:06:29,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:06:30,441 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:06:30,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [648294028] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:06:30,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478610100] [2022-12-14 05:06:30,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:06:30,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:06:30,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:06:30,442 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:06:30,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-12-14 05:06:30,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 05:06:30,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:06:30,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 05:06:30,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:06:30,833 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:06:30,834 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:06:31,450 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:06:31,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:06:31,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-14 05:06:31,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-12-14 05:06:31,483 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 05:06:32,942 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:06:32,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478610100] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:06:32,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:06:32,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 47 [2022-12-14 05:06:32,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832921003] [2022-12-14 05:06:32,943 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:06:32,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-14 05:06:32,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:06:32,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-14 05:06:32,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1930, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 05:06:32,944 INFO L87 Difference]: Start difference. First operand 9221 states and 43331 transitions. Second operand has 48 states, 48 states have (on average 1.625) internal successors, (78), 47 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:07:08,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:07:08,021 INFO L93 Difference]: Finished difference Result 15825 states and 70771 transitions. [2022-12-14 05:07:08,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-14 05:07:08,022 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.625) internal successors, (78), 47 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 05:07:08,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:07:08,068 INFO L225 Difference]: With dead ends: 15825 [2022-12-14 05:07:08,068 INFO L226 Difference]: Without dead ends: 15825 [2022-12-14 05:07:08,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1684 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=990, Invalid=5172, Unknown=0, NotChecked=0, Total=6162 [2022-12-14 05:07:08,069 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1844 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 4837 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1844 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 4869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 4837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:07:08,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1844 Valid, 246 Invalid, 4869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 4837 Invalid, 0 Unknown, 0 Unchecked, 21.1s Time] [2022-12-14 05:07:08,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15825 states. [2022-12-14 05:07:08,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15825 to 10379. [2022-12-14 05:07:08,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10379 states, 10370 states have (on average 4.646383799421408) internal successors, (48183), 10378 states have internal predecessors, (48183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:07:08,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10379 states to 10379 states and 48183 transitions. [2022-12-14 05:07:08,318 INFO L78 Accepts]: Start accepts. Automaton has 10379 states and 48183 transitions. Word has length 14 [2022-12-14 05:07:08,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:07:08,319 INFO L495 AbstractCegarLoop]: Abstraction has 10379 states and 48183 transitions. [2022-12-14 05:07:08,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.625) internal successors, (78), 47 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:07:08,319 INFO L276 IsEmpty]: Start isEmpty. Operand 10379 states and 48183 transitions. [2022-12-14 05:07:08,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 05:07:08,320 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:07:08,321 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1] [2022-12-14 05:07:08,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (47)] Ended with exit code 0 [2022-12-14 05:07:08,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-12-14 05:07:08,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-12-14 05:07:08,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:07:08,923 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 05:07:08,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:07:08,924 INFO L85 PathProgramCache]: Analyzing trace with hash -621704789, now seen corresponding path program 3 times [2022-12-14 05:07:08,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:07:08,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [903354520] [2022-12-14 05:07:08,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:07:08,926 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:07:08,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:07:08,928 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:07:08,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-12-14 05:07:09,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 05:07:09,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:07:09,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 05:07:09,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:07:09,406 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:07:09,406 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:07:09,765 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:07:09,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:07:10,059 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 05:07:10,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-14 05:07:12,290 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:07:12,290 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:07:12,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [903354520] [2022-12-14 05:07:12,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [903354520] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:07:12,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [483164267] [2022-12-14 05:07:12,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:07:12,290 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:07:12,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:07:12,291 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:07:12,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-12-14 05:07:13,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 05:07:13,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:07:13,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 05:07:13,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:07:13,349 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:07:13,349 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:07:14,272 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:07:14,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:07:14,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-14 05:07:14,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-12-14 05:07:14,306 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 05:07:16,521 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:07:16,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [483164267] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:07:16,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385129515] [2022-12-14 05:07:16,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:07:16,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:07:16,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:07:16,522 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:07:16,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-12-14 05:07:16,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 05:07:16,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:07:16,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 05:07:16,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:07:17,785 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:07:17,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:07:19,503 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:07:19,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385129515] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:07:19,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:07:19,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11, 11, 10, 10] total 59 [2022-12-14 05:07:19,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404682860] [2022-12-14 05:07:19,504 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:07:19,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-12-14 05:07:19,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:07:19,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-12-14 05:07:19,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=3189, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 05:07:19,506 INFO L87 Difference]: Start difference. First operand 10379 states and 48183 transitions. Second operand has 60 states, 60 states have (on average 1.3) internal successors, (78), 59 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:08:18,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:08:18,163 INFO L93 Difference]: Finished difference Result 22179 states and 100585 transitions. [2022-12-14 05:08:18,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-14 05:08:18,165 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.3) internal successors, (78), 59 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 05:08:18,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:08:18,236 INFO L225 Difference]: With dead ends: 22179 [2022-12-14 05:08:18,236 INFO L226 Difference]: Without dead ends: 22179 [2022-12-14 05:08:18,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2596 ImplicationChecksByTransitivity, 27.2s TimeCoverageRelationStatistics Valid=1206, Invalid=7536, Unknown=0, NotChecked=0, Total=8742 [2022-12-14 05:08:18,238 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 3032 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 8049 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3032 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 8089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 8049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.7s IncrementalHoareTripleChecker+Time [2022-12-14 05:08:18,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3032 Valid, 417 Invalid, 8089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 8049 Invalid, 0 Unknown, 0 Unchecked, 38.7s Time] [2022-12-14 05:08:18,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22179 states. [2022-12-14 05:08:18,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22179 to 16255. [2022-12-14 05:08:18,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16255 states, 16246 states have (on average 4.77415979317986) internal successors, (77561), 16254 states have internal predecessors, (77561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:08:18,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16255 states to 16255 states and 77561 transitions. [2022-12-14 05:08:18,626 INFO L78 Accepts]: Start accepts. Automaton has 16255 states and 77561 transitions. Word has length 14 [2022-12-14 05:08:18,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:08:18,626 INFO L495 AbstractCegarLoop]: Abstraction has 16255 states and 77561 transitions. [2022-12-14 05:08:18,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.3) internal successors, (78), 59 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:08:18,626 INFO L276 IsEmpty]: Start isEmpty. Operand 16255 states and 77561 transitions. [2022-12-14 05:08:18,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 05:08:18,629 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:08:18,629 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:08:18,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (50)] Ended with exit code 0 [2022-12-14 05:08:18,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-12-14 05:08:19,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-12-14 05:08:19,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:08:19,231 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 05:08:19,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:08:19,232 INFO L85 PathProgramCache]: Analyzing trace with hash -916630875, now seen corresponding path program 2 times [2022-12-14 05:08:19,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:08:19,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1143335738] [2022-12-14 05:08:19,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:08:19,234 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:08:19,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:08:19,237 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:08:19,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-12-14 05:08:19,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 05:08:19,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:08:19,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 05:08:19,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:08:19,646 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:08:19,647 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:08:19,978 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:08:19,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:08:21,402 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:08:21,402 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:08:21,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1143335738] [2022-12-14 05:08:21,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1143335738] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:08:21,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1857461248] [2022-12-14 05:08:21,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:08:21,402 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:08:21,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:08:21,403 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:08:21,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-12-14 05:08:21,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 05:08:21,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:08:21,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 05:08:21,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:08:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:08:22,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:08:23,068 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:08:23,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1857461248] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:08:23,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923052978] [2022-12-14 05:08:23,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:08:23,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:08:23,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:08:23,069 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:08:23,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-12-14 05:08:23,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 05:08:23,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:08:23,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 05:08:23,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:08:23,428 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:08:23,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:08:23,473 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:08:23,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923052978] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:08:23,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:08:23,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 32 [2022-12-14 05:08:23,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736827454] [2022-12-14 05:08:23,473 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:08:23,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 05:08:23,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:08:23,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 05:08:23,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 05:08:23,475 INFO L87 Difference]: Start difference. First operand 16255 states and 77561 transitions. Second operand has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:08:44,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:08:44,795 INFO L93 Difference]: Finished difference Result 19981 states and 90465 transitions. [2022-12-14 05:08:44,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 05:08:44,796 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 05:08:44,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:08:44,858 INFO L225 Difference]: With dead ends: 19981 [2022-12-14 05:08:44,858 INFO L226 Difference]: Without dead ends: 19981 [2022-12-14 05:08:44,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=538, Invalid=2884, Unknown=0, NotChecked=0, Total=3422 [2022-12-14 05:08:44,859 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1170 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 4321 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1170 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 4343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 4321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:08:44,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1170 Valid, 18 Invalid, 4343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 4321 Invalid, 0 Unknown, 0 Unchecked, 14.3s Time] [2022-12-14 05:08:44,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19981 states. [2022-12-14 05:08:45,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19981 to 16451. [2022-12-14 05:08:45,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16451 states, 16442 states have (on average 4.7460771195718285) internal successors, (78035), 16450 states have internal predecessors, (78035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:08:45,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16451 states to 16451 states and 78035 transitions. [2022-12-14 05:08:45,223 INFO L78 Accepts]: Start accepts. Automaton has 16451 states and 78035 transitions. Word has length 15 [2022-12-14 05:08:45,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:08:45,224 INFO L495 AbstractCegarLoop]: Abstraction has 16451 states and 78035 transitions. [2022-12-14 05:08:45,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:08:45,224 INFO L276 IsEmpty]: Start isEmpty. Operand 16451 states and 78035 transitions. [2022-12-14 05:08:45,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 05:08:45,227 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:08:45,227 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:08:45,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 0 [2022-12-14 05:08:45,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-12-14 05:08:45,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-12-14 05:08:45,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:08:45,829 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 05:08:45,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:08:45,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1096227730, now seen corresponding path program 3 times [2022-12-14 05:08:45,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:08:45,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [552409246] [2022-12-14 05:08:45,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:08:45,832 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:08:45,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:08:45,835 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:08:45,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-12-14 05:08:46,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 05:08:46,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:08:46,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 05:08:46,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:08:46,338 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:08:46,339 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:08:46,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-12-14 05:08:46,769 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:08:46,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:08:46,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-14 05:08:46,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-12-14 05:08:46,998 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 05:08:48,786 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:08:48,786 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:08:48,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [552409246] [2022-12-14 05:08:48,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [552409246] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:08:48,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1939104678] [2022-12-14 05:08:48,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:08:48,787 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:08:48,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:08:48,787 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:08:48,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-12-14 05:08:49,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 05:08:49,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:08:49,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 05:08:49,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:08:49,885 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:08:49,885 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:08:50,927 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:08:50,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:08:50,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-14 05:08:50,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-12-14 05:08:50,967 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 05:08:53,181 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:08:53,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1939104678] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:08:53,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101450316] [2022-12-14 05:08:53,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:08:53,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:08:53,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:08:53,183 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:08:53,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-12-14 05:08:53,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 05:08:53,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:08:53,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 05:08:53,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:08:54,907 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:08:54,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:08:56,540 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:08:56,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101450316] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:08:56,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:08:56,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11, 11, 10, 10] total 59 [2022-12-14 05:08:56,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341180552] [2022-12-14 05:08:56,541 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:08:56,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-12-14 05:08:56,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:08:56,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-12-14 05:08:56,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=3214, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 05:08:56,543 INFO L87 Difference]: Start difference. First operand 16451 states and 78035 transitions. Second operand has 60 states, 60 states have (on average 1.5) internal successors, (90), 59 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:09:59,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:09:59,830 INFO L93 Difference]: Finished difference Result 18657 states and 81789 transitions. [2022-12-14 05:09:59,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-14 05:09:59,832 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.5) internal successors, (90), 59 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 05:09:59,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:09:59,888 INFO L225 Difference]: With dead ends: 18657 [2022-12-14 05:09:59,888 INFO L226 Difference]: Without dead ends: 18657 [2022-12-14 05:09:59,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2352 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=1104, Invalid=7452, Unknown=0, NotChecked=0, Total=8556 [2022-12-14 05:09:59,890 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 2309 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 9072 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2309 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 9110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 9072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:09:59,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2309 Valid, 481 Invalid, 9110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 9072 Invalid, 0 Unknown, 0 Unchecked, 44.1s Time] [2022-12-14 05:09:59,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18657 states. [2022-12-14 05:10:00,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18657 to 15727. [2022-12-14 05:10:00,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15727 states, 15718 states have (on average 4.583852907494593) internal successors, (72049), 15726 states have internal predecessors, (72049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:10:00,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15727 states to 15727 states and 72049 transitions. [2022-12-14 05:10:00,240 INFO L78 Accepts]: Start accepts. Automaton has 15727 states and 72049 transitions. Word has length 16 [2022-12-14 05:10:00,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:10:00,241 INFO L495 AbstractCegarLoop]: Abstraction has 15727 states and 72049 transitions. [2022-12-14 05:10:00,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.5) internal successors, (90), 59 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:10:00,241 INFO L276 IsEmpty]: Start isEmpty. Operand 15727 states and 72049 transitions. [2022-12-14 05:10:00,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 05:10:00,245 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:10:00,245 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2022-12-14 05:10:00,253 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-12-14 05:10:00,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2022-12-14 05:10:00,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Ended with exit code 0 [2022-12-14 05:10:00,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:10:00,847 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 05:10:00,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:10:00,848 INFO L85 PathProgramCache]: Analyzing trace with hash -618944821, now seen corresponding path program 4 times [2022-12-14 05:10:00,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:10:00,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1381903018] [2022-12-14 05:10:00,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:10:00,851 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:10:00,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:10:00,852 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:10:00,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-12-14 05:10:01,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:10:01,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:10:01,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 05:10:01,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:10:01,194 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:10:01,194 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:10:01,596 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:10:01,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:10:03,615 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:10:03,615 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:10:03,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1381903018] [2022-12-14 05:10:03,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1381903018] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:10:03,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [32455200] [2022-12-14 05:10:03,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:10:03,616 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:10:03,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:10:03,617 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:10:03,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-12-14 05:10:03,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:10:03,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:10:03,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 05:10:03,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:10:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:10:04,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:10:06,718 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:10:06,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [32455200] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:10:06,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078259049] [2022-12-14 05:10:06,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:10:06,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:10:06,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:10:06,720 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:10:06,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-12-14 05:10:06,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:10:06,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:10:06,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 05:10:06,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:10:08,075 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:10:08,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:10:09,313 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:10:09,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078259049] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:10:09,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:10:09,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13, 13, 13, 13] total 68 [2022-12-14 05:10:09,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237863563] [2022-12-14 05:10:09,313 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:10:09,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-12-14 05:10:09,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:10:09,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-12-14 05:10:09,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=686, Invalid=4144, Unknown=0, NotChecked=0, Total=4830 [2022-12-14 05:10:09,315 INFO L87 Difference]: Start difference. First operand 15727 states and 72049 transitions. Second operand has 70 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 69 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:10:55,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:10:55,960 INFO L93 Difference]: Finished difference Result 23885 states and 106375 transitions. [2022-12-14 05:10:55,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-12-14 05:10:55,962 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 69 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 05:10:55,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:10:56,051 INFO L225 Difference]: With dead ends: 23885 [2022-12-14 05:10:56,051 INFO L226 Difference]: Without dead ends: 23885 [2022-12-14 05:10:56,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4343 ImplicationChecksByTransitivity, 28.4s TimeCoverageRelationStatistics Valid=2365, Invalid=12641, Unknown=0, NotChecked=0, Total=15006 [2022-12-14 05:10:56,053 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 4537 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 14350 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4537 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 14416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 14350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:10:56,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4537 Valid, 792 Invalid, 14416 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [66 Valid, 14350 Invalid, 0 Unknown, 0 Unchecked, 24.5s Time] [2022-12-14 05:10:56,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23885 states. [2022-12-14 05:10:56,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23885 to 19875. [2022-12-14 05:10:56,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19875 states, 19866 states have (on average 4.618393234672304) internal successors, (91749), 19874 states have internal predecessors, (91749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:10:56,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19875 states to 19875 states and 91749 transitions. [2022-12-14 05:10:56,551 INFO L78 Accepts]: Start accepts. Automaton has 19875 states and 91749 transitions. Word has length 16 [2022-12-14 05:10:56,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:10:56,551 INFO L495 AbstractCegarLoop]: Abstraction has 19875 states and 91749 transitions. [2022-12-14 05:10:56,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 69 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:10:56,552 INFO L276 IsEmpty]: Start isEmpty. Operand 19875 states and 91749 transitions. [2022-12-14 05:10:56,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 05:10:56,557 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:10:56,557 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:10:56,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Ended with exit code 0 [2022-12-14 05:10:56,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-12-14 05:10:56,965 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (59)] Ended with exit code 0 [2022-12-14 05:10:57,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 05:10:57,160 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 05:10:57,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:10:57,161 INFO L85 PathProgramCache]: Analyzing trace with hash 2134756623, now seen corresponding path program 3 times [2022-12-14 05:10:57,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:10:57,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1931037470] [2022-12-14 05:10:57,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:10:57,163 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:10:57,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:10:57,166 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:10:57,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-12-14 05:10:57,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 05:10:57,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:10:57,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 05:10:57,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:10:57,932 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:10:57,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:10:58,318 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:10:58,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:10:59,497 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:10:59,497 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:10:59,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1931037470] [2022-12-14 05:10:59,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1931037470] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:10:59,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1582290415] [2022-12-14 05:10:59,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:10:59,498 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:10:59,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:10:59,499 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:10:59,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-12-14 05:11:00,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 05:11:00,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:11:00,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 05:11:00,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:11:00,593 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:11:00,594 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:11:01,299 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:11:01,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:11:02,291 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:11:02,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1582290415] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:11:02,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98938925] [2022-12-14 05:11:02,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:11:02,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:11:02,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:11:02,292 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:11:02,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-12-14 05:11:03,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 05:11:03,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:11:03,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 05:11:03,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:11:04,024 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:11:04,024 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:11:04,804 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:11:04,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:11:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:11:08,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98938925] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:11:08,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:11:08,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10, 10, 11, 11] total 53 [2022-12-14 05:11:08,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850163868] [2022-12-14 05:11:08,999 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:11:08,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-14 05:11:08,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:11:09,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-14 05:11:09,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=2455, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 05:11:09,000 INFO L87 Difference]: Start difference. First operand 19875 states and 91749 transitions. Second operand has 54 states, 54 states have (on average 1.6666666666666667) internal successors, (90), 53 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:12:00,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:12:00,871 INFO L93 Difference]: Finished difference Result 37262 states and 168802 transitions. [2022-12-14 05:12:00,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-14 05:12:00,873 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.6666666666666667) internal successors, (90), 53 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 05:12:00,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:12:01,018 INFO L225 Difference]: With dead ends: 37262 [2022-12-14 05:12:01,018 INFO L226 Difference]: Without dead ends: 37262 [2022-12-14 05:12:01,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2098 ImplicationChecksByTransitivity, 26.0s TimeCoverageRelationStatistics Valid=1192, Invalid=6118, Unknown=0, NotChecked=0, Total=7310 [2022-12-14 05:12:01,019 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2629 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 6455 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2629 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 6487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 6455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:12:01,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2629 Valid, 40 Invalid, 6487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 6455 Invalid, 0 Unknown, 0 Unchecked, 32.3s Time] [2022-12-14 05:12:01,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37262 states. [2022-12-14 05:12:01,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37262 to 25506. [2022-12-14 05:12:01,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25506 states, 25497 states have (on average 4.791700984429541) internal successors, (122174), 25505 states have internal predecessors, (122174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:12:01,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25506 states to 25506 states and 122174 transitions. [2022-12-14 05:12:01,803 INFO L78 Accepts]: Start accepts. Automaton has 25506 states and 122174 transitions. Word has length 17 [2022-12-14 05:12:01,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:12:01,803 INFO L495 AbstractCegarLoop]: Abstraction has 25506 states and 122174 transitions. [2022-12-14 05:12:01,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.6666666666666667) internal successors, (90), 53 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:12:01,804 INFO L276 IsEmpty]: Start isEmpty. Operand 25506 states and 122174 transitions. [2022-12-14 05:12:01,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 05:12:01,808 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:12:01,808 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:12:01,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (62)] Ended with exit code 0 [2022-12-14 05:12:02,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-12-14 05:12:02,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Ended with exit code 0 [2022-12-14 05:12:02,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:12:02,410 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 05:12:02,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:12:02,411 INFO L85 PathProgramCache]: Analyzing trace with hash -831071867, now seen corresponding path program 4 times [2022-12-14 05:12:02,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:12:02,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [579310068] [2022-12-14 05:12:02,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:12:02,413 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:12:02,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:12:02,416 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:12:02,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-12-14 05:12:02,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:12:02,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:12:02,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 05:12:02,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:12:02,780 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:12:02,780 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:12:03,019 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 05:12:03,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:12:04,214 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 05:12:04,214 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:12:04,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [579310068] [2022-12-14 05:12:04,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [579310068] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:12:04,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1886557127] [2022-12-14 05:12:04,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:12:04,215 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:12:04,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:12:04,216 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:12:04,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2022-12-14 05:12:04,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:12:04,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:12:04,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 05:12:04,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:12:05,216 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:12:05,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:12:06,411 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:12:06,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1886557127] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:12:06,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841491014] [2022-12-14 05:12:06,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:12:06,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:12:06,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:12:06,413 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:12:06,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-12-14 05:12:06,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:12:06,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:12:06,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 05:12:06,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:12:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:12:06,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:12:07,174 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:12:07,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841491014] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:12:07,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:12:07,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 11, 11, 11, 11] total 42 [2022-12-14 05:12:07,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481329607] [2022-12-14 05:12:07,175 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:12:07,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 05:12:07,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:12:07,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 05:12:07,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1630, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 05:12:07,176 INFO L87 Difference]: Start difference. First operand 25506 states and 122174 transitions. Second operand has 44 states, 43 states have (on average 1.627906976744186) internal successors, (70), 43 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:12:37,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:12:37,221 INFO L93 Difference]: Finished difference Result 48074 states and 219576 transitions. [2022-12-14 05:12:37,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-14 05:12:37,222 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.627906976744186) internal successors, (70), 43 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-14 05:12:37,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:12:37,387 INFO L225 Difference]: With dead ends: 48074 [2022-12-14 05:12:37,387 INFO L226 Difference]: Without dead ends: 48074 [2022-12-14 05:12:37,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2437 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=1508, Invalid=7048, Unknown=0, NotChecked=0, Total=8556 [2022-12-14 05:12:37,388 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5066 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 7776 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5066 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 7776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:12:37,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5066 Valid, 36 Invalid, 7844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 7776 Invalid, 0 Unknown, 0 Unchecked, 14.0s Time] [2022-12-14 05:12:37,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48074 states. [2022-12-14 05:12:38,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48074 to 27717. [2022-12-14 05:12:38,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27717 states, 27708 states have (on average 4.872058611231413) internal successors, (134995), 27716 states have internal predecessors, (134995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:12:38,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27717 states to 27717 states and 134995 transitions. [2022-12-14 05:12:38,232 INFO L78 Accepts]: Start accepts. Automaton has 27717 states and 134995 transitions. Word has length 17 [2022-12-14 05:12:38,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:12:38,232 INFO L495 AbstractCegarLoop]: Abstraction has 27717 states and 134995 transitions. [2022-12-14 05:12:38,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.627906976744186) internal successors, (70), 43 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:12:38,233 INFO L276 IsEmpty]: Start isEmpty. Operand 27717 states and 134995 transitions. [2022-12-14 05:12:38,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 05:12:38,238 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:12:38,238 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:12:38,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2022-12-14 05:12:38,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-12-14 05:12:38,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (65)] Ended with exit code 0 [2022-12-14 05:12:38,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 05:12:38,840 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 05:12:38,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:12:38,841 INFO L85 PathProgramCache]: Analyzing trace with hash -546410318, now seen corresponding path program 4 times [2022-12-14 05:12:38,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:12:38,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1478700541] [2022-12-14 05:12:38,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:12:38,842 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:12:38,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:12:38,844 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:12:38,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-12-14 05:12:39,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:12:39,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:12:39,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 05:12:39,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:12:39,330 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:12:39,331 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:12:39,796 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:12:39,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:12:42,084 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:12:42,084 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:12:42,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1478700541] [2022-12-14 05:12:42,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1478700541] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:12:42,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1092458059] [2022-12-14 05:12:42,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:12:42,085 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:12:42,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:12:42,086 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:12:42,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2022-12-14 05:12:42,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:12:42,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:12:42,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 05:12:42,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:12:43,386 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:12:43,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:12:45,168 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:12:45,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1092458059] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:12:45,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143064825] [2022-12-14 05:12:45,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:12:45,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:12:45,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:12:45,169 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:12:45,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-12-14 05:12:45,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:12:45,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:12:45,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 05:12:45,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:12:46,643 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:12:46,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:12:48,011 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:12:48,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143064825] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:12:48,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:12:48,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13, 13, 13, 13] total 68 [2022-12-14 05:12:48,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943681013] [2022-12-14 05:12:48,012 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:12:48,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-12-14 05:12:48,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:12:48,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-12-14 05:12:48,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=686, Invalid=4144, Unknown=0, NotChecked=0, Total=4830 [2022-12-14 05:12:48,013 INFO L87 Difference]: Start difference. First operand 27717 states and 134995 transitions. Second operand has 70 states, 69 states have (on average 1.391304347826087) internal successors, (96), 69 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:13:37,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:13:37,484 INFO L93 Difference]: Finished difference Result 45459 states and 219793 transitions. [2022-12-14 05:13:37,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-12-14 05:13:37,486 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 1.391304347826087) internal successors, (96), 69 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 05:13:37,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:13:37,665 INFO L225 Difference]: With dead ends: 45459 [2022-12-14 05:13:37,665 INFO L226 Difference]: Without dead ends: 45459 [2022-12-14 05:13:37,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4343 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=2365, Invalid=12641, Unknown=0, NotChecked=0, Total=15006 [2022-12-14 05:13:37,666 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 4229 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 15585 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4229 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 15654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 15585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.9s IncrementalHoareTripleChecker+Time [2022-12-14 05:13:37,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4229 Valid, 878 Invalid, 15654 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [69 Valid, 15585 Invalid, 0 Unknown, 0 Unchecked, 26.9s Time] [2022-12-14 05:13:37,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45459 states. [2022-12-14 05:13:38,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45459 to 39225. [2022-12-14 05:13:38,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39225 states, 39216 states have (on average 5.009103427172582) internal successors, (196437), 39224 states have internal predecessors, (196437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:13:38,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39225 states to 39225 states and 196437 transitions. [2022-12-14 05:13:38,716 INFO L78 Accepts]: Start accepts. Automaton has 39225 states and 196437 transitions. Word has length 18 [2022-12-14 05:13:38,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:13:38,716 INFO L495 AbstractCegarLoop]: Abstraction has 39225 states and 196437 transitions. [2022-12-14 05:13:38,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 1.391304347826087) internal successors, (96), 69 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:13:38,717 INFO L276 IsEmpty]: Start isEmpty. Operand 39225 states and 196437 transitions. [2022-12-14 05:13:38,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 05:13:38,734 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:13:38,734 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:13:38,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (68)] Ended with exit code 0 [2022-12-14 05:13:38,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Ended with exit code 0 [2022-12-14 05:13:39,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-12-14 05:13:39,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:13:39,336 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 05:13:39,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:13:39,337 INFO L85 PathProgramCache]: Analyzing trace with hash -665835748, now seen corresponding path program 5 times [2022-12-14 05:13:39,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:13:39,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2072159001] [2022-12-14 05:13:39,338 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 05:13:39,339 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:13:39,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:13:39,339 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:13:39,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-12-14 05:13:39,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-14 05:13:39,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:13:39,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 05:13:39,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:13:39,973 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:13:39,973 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:13:40,594 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 05:13:40,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:13:44,643 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:13:44,643 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:13:44,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2072159001] [2022-12-14 05:13:44,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2072159001] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:13:44,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1842783940] [2022-12-14 05:13:44,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 05:13:44,643 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:13:44,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:13:44,644 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:13:44,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2022-12-14 05:13:50,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-14 05:13:50,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:13:50,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 05:13:50,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:13:52,137 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 05:13:52,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:13:54,724 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 05:13:54,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1842783940] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:13:54,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431626439] [2022-12-14 05:13:54,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 05:13:54,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:13:54,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:13:54,725 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:13:54,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0756e597-3876-467c-a681-75b4b292edde/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-12-14 05:17:03,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-14 05:17:03,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:17:03,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 05:17:03,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:17:03,676 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 05:17:03,676 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 05:17:06,166 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 05:17:06,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:17:10,585 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 05:17:10,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431626439] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:17:10,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:17:10,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 14, 14, 16, 16] total 90 [2022-12-14 05:17:10,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797722435] [2022-12-14 05:17:10,586 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:17:10,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-12-14 05:17:10,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:17:10,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-12-14 05:17:10,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=699, Invalid=7491, Unknown=0, NotChecked=0, Total=8190 [2022-12-14 05:17:10,587 INFO L87 Difference]: Start difference. First operand 39225 states and 196437 transitions. Second operand has 91 states, 91 states have (on average 1.3956043956043955) internal successors, (127), 90 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)