./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/unroll-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 7071c3ff0bb3d9f81f254bc51d27ce3551a85cc081b1b878560a7d4c8f67639e --- 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 08:57:08,489 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:57:08,491 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:57:08,511 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:57:08,511 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:57:08,512 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:57:08,513 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:57:08,515 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:57:08,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:57:08,517 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:57:08,518 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:57:08,519 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:57:08,520 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:57:08,521 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:57:08,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:57:08,523 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:57:08,523 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:57:08,524 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:57:08,526 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:57:08,527 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:57:08,529 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:57:08,530 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:57:08,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:57:08,532 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:57:08,535 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:57:08,536 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:57:08,536 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:57:08,537 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:57:08,537 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:57:08,538 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:57:08,539 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:57:08,539 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:57:08,540 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:57:08,541 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:57:08,542 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:57:08,542 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:57:08,543 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:57:08,543 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:57:08,543 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:57:08,544 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:57:08,544 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:57:08,545 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 08:57:08,567 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:57:08,567 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:57:08,567 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:57:08,567 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:57:08,568 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:57:08,568 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:57:08,568 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:57:08,569 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:57:08,569 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:57:08,569 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:57:08,569 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:57:08,569 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:57:08,570 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:57:08,570 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:57:08,570 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:57:08,570 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:57:08,570 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:57:08,571 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:57:08,571 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 08:57:08,571 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 08:57:08,572 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:57:08,572 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:57:08,572 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 08:57:08,572 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:57:08,572 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:57:08,573 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:57:08,573 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 08:57:08,573 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 08:57:08,573 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 08:57:08,573 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:57:08,574 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 08:57:08,574 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:57:08,574 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:57:08,574 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:57:08,574 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:57:08,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:57:08,575 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:57:08,575 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:57:08,575 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:57:08,575 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:57:08,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:57:08,576 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:57:08,576 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_91558c41-1a29-4f53-baf9-705f1e2fffa4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7071c3ff0bb3d9f81f254bc51d27ce3551a85cc081b1b878560a7d4c8f67639e [2022-12-14 08:57:08,759 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:57:08,775 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:57:08,777 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:57:08,778 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:57:08,779 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:57:08,780 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/unroll-4.wvr.c [2022-12-14 08:57:11,308 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:57:11,469 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:57:11,470 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/sv-benchmarks/c/weaver/unroll-4.wvr.c [2022-12-14 08:57:11,475 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/data/c5ab0ff26/7d49f0bfc69e422ca305783b42777c2a/FLAGbdfc2469f [2022-12-14 08:57:11,885 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/data/c5ab0ff26/7d49f0bfc69e422ca305783b42777c2a [2022-12-14 08:57:11,892 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:57:11,894 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:57:11,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:57:11,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:57:11,901 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:57:11,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:57:11" (1/1) ... [2022-12-14 08:57:11,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b4f9df5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:57:11, skipping insertion in model container [2022-12-14 08:57:11,903 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:57:11" (1/1) ... [2022-12-14 08:57:11,911 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:57:11,923 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:57:12,050 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_91558c41-1a29-4f53-baf9-705f1e2fffa4/sv-benchmarks/c/weaver/unroll-4.wvr.c[2572,2585] [2022-12-14 08:57:12,059 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:57:12,068 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 08:57:12,069 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@747f36cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:57:12, skipping insertion in model container [2022-12-14 08:57:12,069 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:57:12,069 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 08:57:12,070 INFO L158 Benchmark]: Toolchain (without parser) took 176.42ms. Allocated memory is still 134.2MB. Free memory was 102.2MB in the beginning and 92.6MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-14 08:57:12,071 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 134.2MB. Free memory is still 77.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 08:57:12,071 INFO L158 Benchmark]: CACSL2BoogieTranslator took 173.21ms. Allocated memory is still 134.2MB. Free memory was 102.2MB in the beginning and 92.6MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-14 08:57:12,073 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 134.2MB. Free memory is still 77.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 173.21ms. Allocated memory is still 134.2MB. Free memory was 102.2MB in the beginning and 92.6MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 103]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 7071c3ff0bb3d9f81f254bc51d27ce3551a85cc081b1b878560a7d4c8f67639e --- 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 08:57:13,454 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:57:13,456 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:57:13,475 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:57:13,475 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:57:13,476 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:57:13,477 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:57:13,479 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:57:13,481 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:57:13,481 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:57:13,482 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:57:13,483 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:57:13,484 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:57:13,485 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:57:13,486 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:57:13,487 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:57:13,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:57:13,489 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:57:13,490 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:57:13,492 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:57:13,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:57:13,494 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:57:13,495 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:57:13,496 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:57:13,499 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:57:13,500 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:57:13,500 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:57:13,501 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:57:13,501 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:57:13,502 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:57:13,502 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:57:13,510 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:57:13,511 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:57:13,512 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:57:13,514 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:57:13,514 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:57:13,515 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:57:13,515 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:57:13,515 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:57:13,516 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:57:13,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:57:13,518 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 08:57:13,534 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:57:13,534 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:57:13,534 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:57:13,534 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:57:13,535 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:57:13,535 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:57:13,535 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:57:13,535 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:57:13,535 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:57:13,535 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:57:13,535 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:57:13,535 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:57:13,536 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 08:57:13,536 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 08:57:13,536 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:57:13,536 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:57:13,536 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 08:57:13,536 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:57:13,536 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:57:13,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:57:13,536 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 08:57:13,537 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 08:57:13,537 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 08:57:13,537 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:57:13,537 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 08:57:13,537 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 08:57:13,537 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 08:57:13,537 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:57:13,537 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:57:13,537 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:57:13,537 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 08:57:13,538 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:57:13,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:57:13,538 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:57:13,538 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:57:13,538 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 08:57:13,538 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 08:57:13,538 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:57:13,538 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 08:57:13,538 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_91558c41-1a29-4f53-baf9-705f1e2fffa4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7071c3ff0bb3d9f81f254bc51d27ce3551a85cc081b1b878560a7d4c8f67639e [2022-12-14 08:57:13,749 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:57:13,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:57:13,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:57:13,768 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:57:13,769 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:57:13,769 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/unroll-4.wvr.c [2022-12-14 08:57:16,430 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:57:16,590 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:57:16,591 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/sv-benchmarks/c/weaver/unroll-4.wvr.c [2022-12-14 08:57:16,598 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/data/334f030af/7d650f3e707745adbb22682a84d32e88/FLAG890f798a3 [2022-12-14 08:57:16,613 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/data/334f030af/7d650f3e707745adbb22682a84d32e88 [2022-12-14 08:57:16,616 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:57:16,617 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:57:16,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:57:16,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:57:16,622 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:57:16,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:57:16" (1/1) ... [2022-12-14 08:57:16,623 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76b657ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:57:16, skipping insertion in model container [2022-12-14 08:57:16,624 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:57:16" (1/1) ... [2022-12-14 08:57:16,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:57:16,646 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:57:16,801 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_91558c41-1a29-4f53-baf9-705f1e2fffa4/sv-benchmarks/c/weaver/unroll-4.wvr.c[2572,2585] [2022-12-14 08:57:16,809 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:57:16,820 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 08:57:16,823 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:57:16,836 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_91558c41-1a29-4f53-baf9-705f1e2fffa4/sv-benchmarks/c/weaver/unroll-4.wvr.c[2572,2585] [2022-12-14 08:57:16,840 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:57:16,846 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:57:16,867 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_91558c41-1a29-4f53-baf9-705f1e2fffa4/sv-benchmarks/c/weaver/unroll-4.wvr.c[2572,2585] [2022-12-14 08:57:16,870 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:57:16,887 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:57:16,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:57:16 WrapperNode [2022-12-14 08:57:16,887 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:57:16,888 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:57:16,888 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:57:16,888 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:57:16,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:57:16" (1/1) ... [2022-12-14 08:57:16,901 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:57:16" (1/1) ... [2022-12-14 08:57:16,917 INFO L138 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 152 [2022-12-14 08:57:16,918 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:57:16,918 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:57:16,918 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:57:16,918 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:57:16,925 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:57:16" (1/1) ... [2022-12-14 08:57:16,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:57:16" (1/1) ... [2022-12-14 08:57:16,928 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:57:16" (1/1) ... [2022-12-14 08:57:16,928 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:57:16" (1/1) ... [2022-12-14 08:57:16,933 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:57:16" (1/1) ... [2022-12-14 08:57:16,936 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:57:16" (1/1) ... [2022-12-14 08:57:16,937 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:57:16" (1/1) ... [2022-12-14 08:57:16,938 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:57:16" (1/1) ... [2022-12-14 08:57:16,940 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:57:16,941 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:57:16,941 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:57:16,941 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:57:16,942 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:57:16" (1/1) ... [2022-12-14 08:57:16,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:57:16,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:57:16,964 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:57:16,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:57:16,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:57:16,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 08:57:16,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 08:57:16,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 08:57:16,997 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 08:57:16,997 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 08:57:16,997 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 08:57:16,998 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 08:57:16,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 08:57:16,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:57:16,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:57:16,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 08:57:16,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 08:57:17,000 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 08:57:17,095 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:57:17,097 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:57:17,492 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:57:17,500 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:57:17,501 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 08:57:17,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:57:17 BoogieIcfgContainer [2022-12-14 08:57:17,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:57:17,505 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:57:17,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:57:17,509 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:57:17,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:57:16" (1/3) ... [2022-12-14 08:57:17,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e8f11f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:57:17, skipping insertion in model container [2022-12-14 08:57:17,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:57:16" (2/3) ... [2022-12-14 08:57:17,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e8f11f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:57:17, skipping insertion in model container [2022-12-14 08:57:17,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:57:17" (3/3) ... [2022-12-14 08:57:17,511 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-4.wvr.c [2022-12-14 08:57:17,529 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:57:17,529 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2022-12-14 08:57:17,529 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 08:57:17,613 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-14 08:57:17,649 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 08:57:17,664 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 212 places, 221 transitions, 458 flow [2022-12-14 08:57:17,666 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 212 places, 221 transitions, 458 flow [2022-12-14 08:57:17,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 212 places, 221 transitions, 458 flow [2022-12-14 08:57:17,743 INFO L130 PetriNetUnfolder]: 16/219 cut-off events. [2022-12-14 08:57:17,743 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-14 08:57:17,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 219 events. 16/219 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 273 event pairs, 0 based on Foata normal form. 0/181 useless extension candidates. Maximal degree in co-relation 117. Up to 2 conditions per place. [2022-12-14 08:57:17,752 INFO L119 LiptonReduction]: Number of co-enabled transitions 5052 [2022-12-14 08:57:42,119 INFO L134 LiptonReduction]: Checked pairs total: 5075 [2022-12-14 08:57:42,119 INFO L136 LiptonReduction]: Total number of compositions: 253 [2022-12-14 08:57:42,125 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 41 transitions, 98 flow [2022-12-14 08:57:42,145 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 294 states, 184 states have (on average 4.043478260869565) internal successors, (744), 293 states have internal predecessors, (744), 0 states have call successors, (0), 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 08:57:42,157 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:57:42,161 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;@2381243d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:57:42,161 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2022-12-14 08:57:42,163 INFO L276 IsEmpty]: Start isEmpty. Operand has 294 states, 184 states have (on average 4.043478260869565) internal successors, (744), 293 states have internal predecessors, (744), 0 states have call successors, (0), 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 08:57:42,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 08:57:42,166 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:57:42,167 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 08:57:42,167 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 08:57:42,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:57:42,170 INFO L85 PathProgramCache]: Analyzing trace with hash 27848, now seen corresponding path program 1 times [2022-12-14 08:57:42,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:57:42,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [823766971] [2022-12-14 08:57:42,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:42,181 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 08:57:42,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:57:42,183 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:57:42,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:57:42,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:42,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:57:42,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:57:42,316 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-14 08:57:42,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-14 08:57:42,340 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 08:57:42,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:57:42,341 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:57:42,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [823766971] [2022-12-14 08:57:42,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [823766971] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:57:42,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:57:42,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:57:42,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297724079] [2022-12-14 08:57:42,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:57:42,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:57:42,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:57:42,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:57:42,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:57:42,368 INFO L87 Difference]: Start difference. First operand has 294 states, 184 states have (on average 4.043478260869565) internal successors, (744), 293 states have internal predecessors, (744), 0 states have call successors, (0), 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 08:57:42,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:57:42,571 INFO L93 Difference]: Finished difference Result 220 states and 553 transitions. [2022-12-14 08:57:42,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:57:42,573 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 08:57:42,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:57:42,582 INFO L225 Difference]: With dead ends: 220 [2022-12-14 08:57:42,582 INFO L226 Difference]: Without dead ends: 220 [2022-12-14 08:57:42,582 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 08:57:42,584 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 32 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:57:42,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 2 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:57:42,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-12-14 08:57:42,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2022-12-14 08:57:42,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 145 states have (on average 3.8137931034482757) internal successors, (553), 219 states have internal predecessors, (553), 0 states have call successors, (0), 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 08:57:42,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 553 transitions. [2022-12-14 08:57:42,617 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 553 transitions. Word has length 2 [2022-12-14 08:57:42,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:57:42,618 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 553 transitions. [2022-12-14 08:57:42,618 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 08:57:42,618 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 553 transitions. [2022-12-14 08:57:42,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 08:57:42,619 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:57:42,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 08:57:42,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:57:42,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:57:42,821 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 08:57:42,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:57:42,823 INFO L85 PathProgramCache]: Analyzing trace with hash 27849, now seen corresponding path program 1 times [2022-12-14 08:57:42,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:57:42,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1802496190] [2022-12-14 08:57:42,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:42,825 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 08:57:42,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:57:42,828 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:57:42,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:57:42,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:42,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 08:57:42,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:57:43,051 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 08:57:43,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 08:57:43,083 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 08:57:43,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:57:43,084 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:57:43,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1802496190] [2022-12-14 08:57:43,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1802496190] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:57:43,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:57:43,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:57:43,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772898928] [2022-12-14 08:57:43,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:57:43,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:57:43,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:57:43,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:57:43,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:57:43,087 INFO L87 Difference]: Start difference. First operand 220 states and 553 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 08:57:43,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:57:43,478 INFO L93 Difference]: Finished difference Result 438 states and 1104 transitions. [2022-12-14 08:57:43,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:57:43,479 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 08:57:43,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:57:43,481 INFO L225 Difference]: With dead ends: 438 [2022-12-14 08:57:43,481 INFO L226 Difference]: Without dead ends: 438 [2022-12-14 08:57:43,481 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 08:57:43,482 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 30 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:57:43,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 4 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 08:57:43,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-12-14 08:57:43,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 221. [2022-12-14 08:57:43,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 146 states have (on average 3.815068493150685) internal successors, (557), 220 states have internal predecessors, (557), 0 states have call successors, (0), 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 08:57:43,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 557 transitions. [2022-12-14 08:57:43,493 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 557 transitions. Word has length 2 [2022-12-14 08:57:43,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:57:43,494 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 557 transitions. [2022-12-14 08:57:43,494 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 08:57:43,494 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 557 transitions. [2022-12-14 08:57:43,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 08:57:43,494 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:57:43,494 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 08:57:43,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:57:43,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:57:43,696 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 08:57:43,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:57:43,698 INFO L85 PathProgramCache]: Analyzing trace with hash 28029, now seen corresponding path program 1 times [2022-12-14 08:57:43,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:57:43,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1749037023] [2022-12-14 08:57:43,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:43,700 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 08:57:43,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:57:43,703 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:57:43,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:57:43,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:43,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 08:57:43,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:57:43,823 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 08:57:43,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:57:43,824 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:57:43,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1749037023] [2022-12-14 08:57:43,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1749037023] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:57:43,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:57:43,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:57:43,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088744740] [2022-12-14 08:57:43,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:57:43,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:57:43,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:57:43,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:57:43,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:57:43,826 INFO L87 Difference]: Start difference. First operand 221 states and 557 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 08:57:44,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:57:44,055 INFO L93 Difference]: Finished difference Result 221 states and 554 transitions. [2022-12-14 08:57:44,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:57:44,056 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 08:57:44,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:57:44,057 INFO L225 Difference]: With dead ends: 221 [2022-12-14 08:57:44,057 INFO L226 Difference]: Without dead ends: 221 [2022-12-14 08:57:44,058 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 08:57:44,059 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:57:44,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:57:44,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-12-14 08:57:44,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2022-12-14 08:57:44,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 146 states have (on average 3.7945205479452055) internal successors, (554), 220 states have internal predecessors, (554), 0 states have call successors, (0), 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 08:57:44,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 554 transitions. [2022-12-14 08:57:44,070 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 554 transitions. Word has length 2 [2022-12-14 08:57:44,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:57:44,071 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 554 transitions. [2022-12-14 08:57:44,071 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 08:57:44,071 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 554 transitions. [2022-12-14 08:57:44,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 08:57:44,071 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:57:44,071 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 08:57:44,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:57:44,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:57:44,273 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 08:57:44,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:57:44,273 INFO L85 PathProgramCache]: Analyzing trace with hash 867019, now seen corresponding path program 1 times [2022-12-14 08:57:44,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:57:44,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [581721037] [2022-12-14 08:57:44,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:44,274 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 08:57:44,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:57:44,275 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:57:44,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:57:44,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:44,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 08:57:44,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:57:44,410 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 08:57:44,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 08:57:44,469 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 08:57:44,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:57:44,648 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 08:57:44,648 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:57:44,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [581721037] [2022-12-14 08:57:44,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [581721037] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:57:44,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1410941138] [2022-12-14 08:57:44,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:44,649 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:57:44,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:57:44,650 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:57:44,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-12-14 08:57:44,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:44,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 08:57:44,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:57:44,787 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 08:57:44,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 08:57:44,833 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 08:57:44,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:57:44,892 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 08:57:44,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1410941138] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:57:44,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857373860] [2022-12-14 08:57:44,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:44,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:57:44,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:57:44,894 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:57:44,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 08:57:44,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:44,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 08:57:44,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:57:44,998 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 08:57:44,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 08:57:45,034 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 08:57:45,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:57:45,159 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 08:57:45,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857373860] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:57:45,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:57:45,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 7 [2022-12-14 08:57:45,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180183163] [2022-12-14 08:57:45,160 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:57:45,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 08:57:45,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:57:45,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 08:57:45,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-12-14 08:57:45,161 INFO L87 Difference]: Start difference. First operand 221 states and 554 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:57:46,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:57:46,368 INFO L93 Difference]: Finished difference Result 658 states and 1660 transitions. [2022-12-14 08:57:46,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 08:57:46,369 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 08:57:46,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:57:46,372 INFO L225 Difference]: With dead ends: 658 [2022-12-14 08:57:46,372 INFO L226 Difference]: Without dead ends: 658 [2022-12-14 08:57:46,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:57:46,373 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 207 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:57:46,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 8 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 08:57:46,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-12-14 08:57:46,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 224. [2022-12-14 08:57:46,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 149 states have (on average 3.7986577181208054) internal successors, (566), 223 states have internal predecessors, (566), 0 states have call successors, (0), 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 08:57:46,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 566 transitions. [2022-12-14 08:57:46,380 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 566 transitions. Word has length 3 [2022-12-14 08:57:46,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:57:46,381 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 566 transitions. [2022-12-14 08:57:46,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:57:46,381 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 566 transitions. [2022-12-14 08:57:46,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 08:57:46,381 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:57:46,381 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 08:57:46,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2022-12-14 08:57:46,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 08:57:46,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:57:46,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:57:46,984 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 08:57:46,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:57:46,985 INFO L85 PathProgramCache]: Analyzing trace with hash 867199, now seen corresponding path program 1 times [2022-12-14 08:57:46,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:57:46,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [182315591] [2022-12-14 08:57:46,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:46,986 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 08:57:46,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:57:46,987 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:57:46,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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)] Waiting until timeout for monitored process [2022-12-14 08:57:47,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:47,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 08:57:47,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:57:47,079 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-12-14 08:57:47,079 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 3 case distinctions, treesize of input 22 treesize of output 29 [2022-12-14 08:57:47,113 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 08:57:47,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:57:47,113 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:57:47,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [182315591] [2022-12-14 08:57:47,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [182315591] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:57:47,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:57:47,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:57:47,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8593194] [2022-12-14 08:57:47,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:57:47,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:57:47,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:57:47,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:57:47,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:57:47,114 INFO L87 Difference]: Start difference. First operand 224 states and 566 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 08:57:47,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:57:47,271 INFO L93 Difference]: Finished difference Result 183 states and 442 transitions. [2022-12-14 08:57:47,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:57:47,271 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 08:57:47,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:57:47,273 INFO L225 Difference]: With dead ends: 183 [2022-12-14 08:57:47,273 INFO L226 Difference]: Without dead ends: 183 [2022-12-14 08:57:47,273 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 08:57:47,274 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:57:47,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 2 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:57:47,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-12-14 08:57:47,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2022-12-14 08:57:47,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 127 states have (on average 3.4803149606299213) internal successors, (442), 182 states have internal predecessors, (442), 0 states have call successors, (0), 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 08:57:47,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 442 transitions. [2022-12-14 08:57:47,278 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 442 transitions. Word has length 3 [2022-12-14 08:57:47,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:57:47,278 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 442 transitions. [2022-12-14 08:57:47,278 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 08:57:47,278 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 442 transitions. [2022-12-14 08:57:47,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 08:57:47,278 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:57:47,278 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 08:57:47,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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)] Forceful destruction successful, exit code 0 [2022-12-14 08:57:47,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:57:47,480 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 08:57:47,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:57:47,481 INFO L85 PathProgramCache]: Analyzing trace with hash 867200, now seen corresponding path program 1 times [2022-12-14 08:57:47,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:57:47,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1777711772] [2022-12-14 08:57:47,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:47,483 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 08:57:47,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:57:47,486 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:57:47,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 (9)] Waiting until timeout for monitored process [2022-12-14 08:57:47,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:47,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 08:57:47,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:57:47,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:57:47,589 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-12-14 08:57:47,589 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 2 case distinctions, treesize of input 14 treesize of output 26 [2022-12-14 08:57:47,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 08:57:47,656 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 08:57:47,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:57:47,657 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:57:47,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1777711772] [2022-12-14 08:57:47,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1777711772] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:57:47,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:57:47,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:57:47,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904475357] [2022-12-14 08:57:47,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:57:47,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:57:47,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:57:47,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:57:47,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:57:47,658 INFO L87 Difference]: Start difference. First operand 183 states and 442 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 08:57:47,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:57:47,801 INFO L93 Difference]: Finished difference Result 142 states and 318 transitions. [2022-12-14 08:57:47,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:57:47,802 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 08:57:47,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:57:47,803 INFO L225 Difference]: With dead ends: 142 [2022-12-14 08:57:47,803 INFO L226 Difference]: Without dead ends: 142 [2022-12-14 08:57:47,803 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 08:57:47,803 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:57:47,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 2 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:57:47,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-12-14 08:57:47,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-12-14 08:57:47,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 105 states have (on average 3.0285714285714285) internal successors, (318), 141 states have internal predecessors, (318), 0 states have call successors, (0), 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 08:57:47,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 318 transitions. [2022-12-14 08:57:47,806 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 318 transitions. Word has length 3 [2022-12-14 08:57:47,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:57:47,806 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 318 transitions. [2022-12-14 08:57:47,806 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 08:57:47,807 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 318 transitions. [2022-12-14 08:57:47,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 08:57:47,807 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:57:47,807 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 08:57:47,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 (9)] Ended with exit code 0 [2022-12-14 08:57:48,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:57:48,008 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 08:57:48,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:57:48,009 INFO L85 PathProgramCache]: Analyzing trace with hash 833396681, now seen corresponding path program 1 times [2022-12-14 08:57:48,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:57:48,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [344306911] [2022-12-14 08:57:48,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:48,011 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 08:57:48,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:57:48,019 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:57:48,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:57:48,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:48,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 08:57:48,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:57:48,099 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-12-14 08:57:48,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 22 [2022-12-14 08:57:48,115 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 08:57:48,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:57:48,115 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:57:48,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [344306911] [2022-12-14 08:57:48,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [344306911] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:57:48,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:57:48,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:57:48,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327692428] [2022-12-14 08:57:48,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:57:48,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:57:48,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:57:48,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:57:48,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:57:48,117 INFO L87 Difference]: Start difference. First operand 142 states and 318 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 08:57:48,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:57:48,241 INFO L93 Difference]: Finished difference Result 129 states and 292 transitions. [2022-12-14 08:57:48,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:57:48,241 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 08:57:48,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:57:48,242 INFO L225 Difference]: With dead ends: 129 [2022-12-14 08:57:48,242 INFO L226 Difference]: Without dead ends: 129 [2022-12-14 08:57:48,242 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 08:57:48,243 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:57:48,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 2 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:57:48,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-12-14 08:57:48,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-12-14 08:57:48,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 101 states have (on average 2.891089108910891) internal successors, (292), 128 states have internal predecessors, (292), 0 states have call successors, (0), 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 08:57:48,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 292 transitions. [2022-12-14 08:57:48,246 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 292 transitions. Word has length 5 [2022-12-14 08:57:48,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:57:48,246 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 292 transitions. [2022-12-14 08:57:48,246 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 08:57:48,246 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 292 transitions. [2022-12-14 08:57:48,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 08:57:48,247 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:57:48,247 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 08:57:48,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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)] Forceful destruction successful, exit code 0 [2022-12-14 08:57:48,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:57:48,448 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 08:57:48,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:57:48,450 INFO L85 PathProgramCache]: Analyzing trace with hash 833396682, now seen corresponding path program 1 times [2022-12-14 08:57:48,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:57:48,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [179086915] [2022-12-14 08:57:48,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:48,451 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:57:48,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:57:48,452 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:57:48,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:57:48,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:48,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 08:57:48,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:57:48,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:57:48,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:57:48,564 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 08:57:48,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2022-12-14 08:57:48,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-14 08:57:48,584 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 08:57:48,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:57:48,584 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:57:48,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [179086915] [2022-12-14 08:57:48,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [179086915] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:57:48,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:57:48,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:57:48,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780380187] [2022-12-14 08:57:48,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:57:48,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:57:48,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:57:48,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:57:48,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:57:48,585 INFO L87 Difference]: Start difference. First operand 129 states and 292 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 08:57:48,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:57:48,718 INFO L93 Difference]: Finished difference Result 116 states and 266 transitions. [2022-12-14 08:57:48,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:57:48,718 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 08:57:48,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:57:48,719 INFO L225 Difference]: With dead ends: 116 [2022-12-14 08:57:48,720 INFO L226 Difference]: Without dead ends: 116 [2022-12-14 08:57:48,720 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 08:57:48,720 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:57:48,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 2 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:57:48,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-12-14 08:57:48,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-12-14 08:57:48,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 97 states have (on average 2.7422680412371134) internal successors, (266), 115 states have internal predecessors, (266), 0 states have call successors, (0), 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 08:57:48,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 266 transitions. [2022-12-14 08:57:48,725 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 266 transitions. Word has length 5 [2022-12-14 08:57:48,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:57:48,725 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 266 transitions. [2022-12-14 08:57:48,725 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 08:57:48,725 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 266 transitions. [2022-12-14 08:57:48,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 08:57:48,725 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:57:48,725 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 08:57:48,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:57:48,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:57:48,927 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 08:57:48,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:57:48,928 INFO L85 PathProgramCache]: Analyzing trace with hash 63233353, now seen corresponding path program 2 times [2022-12-14 08:57:48,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:57:48,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1892106033] [2022-12-14 08:57:48,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:57:48,930 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 08:57:48,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:57:48,933 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:57:48,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:57:49,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 08:57:49,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:57:49,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 08:57:49,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:57:49,074 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 08:57:49,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 08:57:49,218 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 08:57:49,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:57:49,903 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 08:57:49,903 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:57:49,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1892106033] [2022-12-14 08:57:49,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1892106033] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:57:49,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1795192139] [2022-12-14 08:57:49,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:57:49,904 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:57:49,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:57:49,905 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:57:49,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-12-14 08:57:50,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 08:57:50,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:57:50,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 08:57:50,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:57:50,069 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 08:57:50,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 08:57:50,121 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 08:57:50,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:57:50,243 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:57:50,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1795192139] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:57:50,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654241993] [2022-12-14 08:57:50,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:57:50,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:57:50,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:57:50,245 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:57:50,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 08:57:50,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 08:57:50,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:57:50,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 08:57:50,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:57:50,387 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 08:57:50,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 08:57:50,543 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 08:57:50,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:57:50,689 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 08:57:50,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654241993] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:57:50,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:57:50,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2022-12-14 08:57:50,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502703274] [2022-12-14 08:57:50,690 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:57:50,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 08:57:50,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:57:50,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 08:57:50,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-12-14 08:57:50,691 INFO L87 Difference]: Start difference. First operand 116 states and 266 transitions. Second operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 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 08:57:54,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:57:54,726 INFO L93 Difference]: Finished difference Result 994 states and 2318 transitions. [2022-12-14 08:57:54,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 08:57:54,727 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 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 08:57:54,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:57:54,730 INFO L225 Difference]: With dead ends: 994 [2022-12-14 08:57:54,730 INFO L226 Difference]: Without dead ends: 994 [2022-12-14 08:57:54,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2022-12-14 08:57:54,731 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 572 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-14 08:57:54,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 68 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-12-14 08:57:54,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2022-12-14 08:57:54,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 122. [2022-12-14 08:57:54,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 103 states have (on average 2.6990291262135924) internal successors, (278), 121 states have internal predecessors, (278), 0 states have call successors, (0), 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 08:57:54,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 278 transitions. [2022-12-14 08:57:54,737 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 278 transitions. Word has length 6 [2022-12-14 08:57:54,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:57:54,737 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 278 transitions. [2022-12-14 08:57:54,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 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 08:57:54,737 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 278 transitions. [2022-12-14 08:57:54,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 08:57:54,737 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:57:54,738 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 08:57:54,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2022-12-14 08:57:54,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 08:57:55,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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)] Ended with exit code 0 [2022-12-14 08:57:55,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:57:55,340 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 08:57:55,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:57:55,342 INFO L85 PathProgramCache]: Analyzing trace with hash 65485957, now seen corresponding path program 1 times [2022-12-14 08:57:55,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:57:55,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [249531814] [2022-12-14 08:57:55,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:55,343 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:57:55,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:57:55,346 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:57:55,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 (15)] Waiting until timeout for monitored process [2022-12-14 08:57:55,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:55,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 08:57:55,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:57:55,472 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-14 08:57:55,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-14 08:57:55,487 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 08:57:55,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:57:55,488 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:57:55,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [249531814] [2022-12-14 08:57:55,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [249531814] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:57:55,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:57:55,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:57:55,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436186725] [2022-12-14 08:57:55,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:57:55,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:57:55,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:57:55,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:57:55,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:57:55,489 INFO L87 Difference]: Start difference. First operand 122 states and 278 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:57:55,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:57:55,632 INFO L93 Difference]: Finished difference Result 94 states and 210 transitions. [2022-12-14 08:57:55,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:57:55,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 08:57:55,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:57:55,633 INFO L225 Difference]: With dead ends: 94 [2022-12-14 08:57:55,633 INFO L226 Difference]: Without dead ends: 94 [2022-12-14 08:57:55,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 08:57:55,634 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:57:55,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 2 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:57:55,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-12-14 08:57:55,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-12-14 08:57:55,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 83 states have (on average 2.5301204819277108) internal successors, (210), 93 states have internal predecessors, (210), 0 states have call successors, (0), 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 08:57:55,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 210 transitions. [2022-12-14 08:57:55,636 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 210 transitions. Word has length 6 [2022-12-14 08:57:55,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:57:55,636 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 210 transitions. [2022-12-14 08:57:55,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:57:55,636 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 210 transitions. [2022-12-14 08:57:55,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 08:57:55,636 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:57:55,636 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 08:57:55,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 (15)] Forceful destruction successful, exit code 0 [2022-12-14 08:57:55,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:57:55,837 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 08:57:55,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:57:55,838 INFO L85 PathProgramCache]: Analyzing trace with hash 65485958, now seen corresponding path program 1 times [2022-12-14 08:57:55,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:57:55,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [73490879] [2022-12-14 08:57:55,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:55,838 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 08:57:55,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:57:55,839 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:57:55,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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)] Waiting until timeout for monitored process [2022-12-14 08:57:55,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:55,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 08:57:55,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:57:56,002 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 08:57:56,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:57:56,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2022-12-14 08:57:56,231 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 08:57:56,231 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:57:56,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [73490879] [2022-12-14 08:57:56,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [73490879] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:57:56,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1579277400] [2022-12-14 08:57:56,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:56,231 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:57:56,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:57:56,232 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:57:56,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-12-14 08:57:56,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:56,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 08:57:56,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:57:56,392 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 08:57:56,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 08:57:56,544 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 08:57:56,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:57:56,829 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 08:57:56,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1579277400] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:57:56,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74937167] [2022-12-14 08:57:56,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:56,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:57:56,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:57:56,831 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:57:56,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 08:57:56,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:56,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 08:57:56,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:57:56,956 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 08:57:56,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 08:57:57,081 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 08:57:57,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:57:57,180 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 08:57:57,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74937167] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:57:57,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:57:57,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 12 [2022-12-14 08:57:57,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894674418] [2022-12-14 08:57:57,181 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:57:57,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 08:57:57,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:57:57,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 08:57:57,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 08:57:57,182 INFO L87 Difference]: Start difference. First operand 94 states and 210 transitions. Second operand has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 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 08:57:58,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:57:58,364 INFO L93 Difference]: Finished difference Result 256 states and 576 transitions. [2022-12-14 08:57:58,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:57:58,365 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 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 08:57:58,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:57:58,365 INFO L225 Difference]: With dead ends: 256 [2022-12-14 08:57:58,365 INFO L226 Difference]: Without dead ends: 256 [2022-12-14 08:57:58,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-12-14 08:57:58,366 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 200 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:57:58,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 19 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 08:57:58,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-12-14 08:57:58,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 133. [2022-12-14 08:57:58,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 122 states have (on average 2.7868852459016393) internal successors, (340), 132 states have internal predecessors, (340), 0 states have call successors, (0), 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 08:57:58,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 340 transitions. [2022-12-14 08:57:58,369 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 340 transitions. Word has length 6 [2022-12-14 08:57:58,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:57:58,370 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 340 transitions. [2022-12-14 08:57:58,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 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 08:57:58,370 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 340 transitions. [2022-12-14 08:57:58,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 08:57:58,370 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:57:58,370 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:57:58,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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)] Ended with exit code 0 [2022-12-14 08:57:58,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-12-14 08:57:58,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 08:57:58,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:57:58,972 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 08:57:58,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:57:58,973 INFO L85 PathProgramCache]: Analyzing trace with hash 2030065877, now seen corresponding path program 1 times [2022-12-14 08:57:58,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:57:58,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1939722764] [2022-12-14 08:57:58,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:58,975 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 08:57:58,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:57:58,977 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:57:58,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 (19)] Waiting until timeout for monitored process [2022-12-14 08:57:59,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:59,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 08:57:59,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:57:59,110 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 08:57:59,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 08:57:59,212 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 08:57:59,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:57:59,784 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 08:57:59,784 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:57:59,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1939722764] [2022-12-14 08:57:59,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1939722764] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:57:59,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2064499412] [2022-12-14 08:57:59,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:57:59,784 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:57:59,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:57:59,785 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:57:59,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-12-14 08:57:59,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:57:59,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 08:57:59,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:57:59,947 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 08:57:59,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 08:58:00,053 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 08:58:00,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:58:00,264 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 08:58:00,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2064499412] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:58:00,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848726948] [2022-12-14 08:58:00,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:58:00,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:58:00,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:58:00,265 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:58:00,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 08:58:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:58:00,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 08:58:00,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:58:00,388 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 08:58:00,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 08:58:00,520 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 08:58:00,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:58:00,751 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 08:58:00,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848726948] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:58:00,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:58:00,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 9 [2022-12-14 08:58:00,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657616553] [2022-12-14 08:58:00,752 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:58:00,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 08:58:00,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:58:00,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 08:58:00,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:58:00,753 INFO L87 Difference]: Start difference. First operand 133 states and 340 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:58:03,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:58:03,725 INFO L93 Difference]: Finished difference Result 202 states and 483 transitions. [2022-12-14 08:58:03,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:58:03,727 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 08:58:03,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:58:03,727 INFO L225 Difference]: With dead ends: 202 [2022-12-14 08:58:03,727 INFO L226 Difference]: Without dead ends: 202 [2022-12-14 08:58:03,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-12-14 08:58:03,728 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 117 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:58:03,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 14 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-12-14 08:58:03,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-12-14 08:58:03,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 137. [2022-12-14 08:58:03,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 126 states have (on average 2.634920634920635) internal successors, (332), 136 states have internal predecessors, (332), 0 states have call successors, (0), 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 08:58:03,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 332 transitions. [2022-12-14 08:58:03,731 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 332 transitions. Word has length 7 [2022-12-14 08:58:03,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:58:03,731 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 332 transitions. [2022-12-14 08:58:03,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:58:03,732 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 332 transitions. [2022-12-14 08:58:03,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 08:58:03,732 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:58:03,732 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-14 08:58:03,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 (19)] Ended with exit code 0 [2022-12-14 08:58:03,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 08:58:04,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2022-12-14 08:58:04,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 08:58:04,335 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 08:58:04,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:58:04,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1157198765, now seen corresponding path program 2 times [2022-12-14 08:58:04,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:58:04,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1286268824] [2022-12-14 08:58:04,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:58:04,338 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 08:58:04,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:58:04,339 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:58:04,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 (22)] Waiting until timeout for monitored process [2022-12-14 08:58:04,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 08:58:04,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:58:04,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 08:58:04,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:58:04,481 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 08:58:04,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 08:58:04,592 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 08:58:04,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:58:04,592 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:58:04,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1286268824] [2022-12-14 08:58:04,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1286268824] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:58:04,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:58:04,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:58:04,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536517910] [2022-12-14 08:58:04,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:58:04,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:58:04,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:58:04,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:58:04,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:58:04,598 INFO L87 Difference]: Start difference. First operand 137 states and 332 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:58:04,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:58:04,803 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2022-12-14 08:58:04,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:58:04,804 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 08:58:04,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:58:04,804 INFO L225 Difference]: With dead ends: 81 [2022-12-14 08:58:04,804 INFO L226 Difference]: Without dead ends: 81 [2022-12-14 08:58:04,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 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 08:58:04,805 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:58:04,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 2 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:58:04,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-12-14 08:58:04,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 46. [2022-12-14 08:58:04,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 2.159090909090909) internal successors, (95), 45 states have internal predecessors, (95), 0 states have call successors, (0), 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 08:58:04,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 95 transitions. [2022-12-14 08:58:04,807 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 95 transitions. Word has length 10 [2022-12-14 08:58:04,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:58:04,807 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 95 transitions. [2022-12-14 08:58:04,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:58:04,807 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 95 transitions. [2022-12-14 08:58:04,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 08:58:04,808 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:58:04,808 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-12-14 08:58:04,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 (22)] Ended with exit code 0 [2022-12-14 08:58:05,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:58:05,010 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 08:58:05,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:58:05,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1943178761, now seen corresponding path program 3 times [2022-12-14 08:58:05,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:58:05,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2112278370] [2022-12-14 08:58:05,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:58:05,012 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 08:58:05,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:58:05,015 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:58:05,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:58:05,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 08:58:05,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:58:05,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 08:58:05,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:58:05,249 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 08:58:05,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 08:58:05,581 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 08:58:05,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:58:07,893 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 08:58:07,894 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:58:07,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2112278370] [2022-12-14 08:58:07,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2112278370] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:58:07,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1565350206] [2022-12-14 08:58:07,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:58:07,894 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:58:07,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:58:07,895 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:58:07,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-12-14 08:58:08,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 08:58:08,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:58:08,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 08:58:08,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:58:08,512 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 08:58:08,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 08:58:08,660 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 08:58:08,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:58:09,009 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 08:58:09,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1565350206] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:58:09,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716811700] [2022-12-14 08:58:09,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:58:09,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:58:09,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:58:09,010 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:58:09,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 08:58:10,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 08:58:10,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:58:10,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 08:58:10,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:58:10,508 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 08:58:10,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 08:58:11,102 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 08:58:11,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:58:11,407 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 08:58:11,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716811700] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:58:11,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:58:11,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 32 [2022-12-14 08:58:11,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487961735] [2022-12-14 08:58:11,407 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:58:11,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 08:58:11,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:58:11,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 08:58:11,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 08:58:11,408 INFO L87 Difference]: Start difference. First operand 46 states and 95 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 08:58:27,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:58:27,285 INFO L93 Difference]: Finished difference Result 718 states and 1559 transitions. [2022-12-14 08:58:27,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 08:58:27,287 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 08:58:27,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:58:27,288 INFO L225 Difference]: With dead ends: 718 [2022-12-14 08:58:27,288 INFO L226 Difference]: Without dead ends: 718 [2022-12-14 08:58:27,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=646, Invalid=1246, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 08:58:27,289 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1830 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 2371 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1830 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 2373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:58:27,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1830 Valid, 332 Invalid, 2373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2371 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-12-14 08:58:27,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-12-14 08:58:27,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 58. [2022-12-14 08:58:27,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 56 states have (on average 2.125) internal successors, (119), 57 states have internal predecessors, (119), 0 states have call successors, (0), 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 08:58:27,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 119 transitions. [2022-12-14 08:58:27,293 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 119 transitions. Word has length 12 [2022-12-14 08:58:27,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:58:27,293 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 119 transitions. [2022-12-14 08:58:27,293 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 08:58:27,293 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 119 transitions. [2022-12-14 08:58:27,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 08:58:27,294 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:58:27,294 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:58:27,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-14 08:58:27,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2022-12-14 08:58:27,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:58:27,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:58:27,896 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 08:58:27,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:58:27,897 INFO L85 PathProgramCache]: Analyzing trace with hash 963584725, now seen corresponding path program 1 times [2022-12-14 08:58:27,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:58:27,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1279907846] [2022-12-14 08:58:27,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:58:27,899 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 08:58:27,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:58:27,901 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:58:27,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 (26)] Waiting until timeout for monitored process [2022-12-14 08:58:27,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:58:27,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 08:58:27,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:58:28,013 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 08:58:28,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:58:28,013 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:58:28,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1279907846] [2022-12-14 08:58:28,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1279907846] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:58:28,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:58:28,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:58:28,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780098489] [2022-12-14 08:58:28,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:58:28,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:58:28,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:58:28,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:58:28,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:58:28,014 INFO L87 Difference]: Start difference. First operand 58 states and 119 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:58:28,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:58:28,104 INFO L93 Difference]: Finished difference Result 85 states and 180 transitions. [2022-12-14 08:58:28,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:58:28,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 08:58:28,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:58:28,106 INFO L225 Difference]: With dead ends: 85 [2022-12-14 08:58:28,106 INFO L226 Difference]: Without dead ends: 80 [2022-12-14 08:58:28,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 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 08:58:28,107 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:58:28,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 4 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:58:28,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-12-14 08:58:28,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-12-14 08:58:28,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 78 states have (on average 2.1794871794871793) internal successors, (170), 79 states have internal predecessors, (170), 0 states have call successors, (0), 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 08:58:28,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 170 transitions. [2022-12-14 08:58:28,110 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 170 transitions. Word has length 15 [2022-12-14 08:58:28,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:58:28,110 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 170 transitions. [2022-12-14 08:58:28,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:58:28,110 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 170 transitions. [2022-12-14 08:58:28,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 08:58:28,110 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:58:28,110 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:58:28,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 (26)] Ended with exit code 0 [2022-12-14 08:58:28,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:58:28,312 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 08:58:28,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:58:28,313 INFO L85 PathProgramCache]: Analyzing trace with hash -614846642, now seen corresponding path program 1 times [2022-12-14 08:58:28,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:58:28,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1785141111] [2022-12-14 08:58:28,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:58:28,314 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:58:28,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:58:28,317 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:58:28,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:58:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:58:28,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:58:28,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:58:28,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:58:28,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:58:28,527 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:58:28,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1785141111] [2022-12-14 08:58:28,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1785141111] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:58:28,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:58:28,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:58:28,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030178622] [2022-12-14 08:58:28,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:58:28,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:58:28,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:58:28,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:58:28,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:58:28,528 INFO L87 Difference]: Start difference. First operand 80 states and 170 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:58:28,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:58:28,665 INFO L93 Difference]: Finished difference Result 94 states and 196 transitions. [2022-12-14 08:58:28,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:58:28,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 08:58:28,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:58:28,666 INFO L225 Difference]: With dead ends: 94 [2022-12-14 08:58:28,666 INFO L226 Difference]: Without dead ends: 90 [2022-12-14 08:58:28,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 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 08:58:28,666 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:58:28,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 8 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:58:28,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-12-14 08:58:28,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 80. [2022-12-14 08:58:28,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 78 states have (on average 2.2051282051282053) internal successors, (172), 79 states have internal predecessors, (172), 0 states have call successors, (0), 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 08:58:28,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 172 transitions. [2022-12-14 08:58:28,669 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 172 transitions. Word has length 16 [2022-12-14 08:58:28,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:58:28,670 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 172 transitions. [2022-12-14 08:58:28,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:58:28,670 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 172 transitions. [2022-12-14 08:58:28,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 08:58:28,670 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:58:28,670 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:58:28,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:58:28,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:58:28,872 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 08:58:28,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:58:28,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1448030679, now seen corresponding path program 1 times [2022-12-14 08:58:28,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:58:28,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [565621192] [2022-12-14 08:58:28,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:58:28,874 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 08:58:28,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:58:28,875 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:58:28,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:58:28,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:58:28,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 08:58:28,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:58:29,030 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 08:58:29,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:58:29,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:58:29,058 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:58:29,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [565621192] [2022-12-14 08:58:29,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [565621192] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 08:58:29,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 08:58:29,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 08:58:29,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590873059] [2022-12-14 08:58:29,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:58:29,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:58:29,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:58:29,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:58:29,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 08:58:29,059 INFO L87 Difference]: Start difference. First operand 80 states and 172 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:58:29,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:58:29,211 INFO L93 Difference]: Finished difference Result 84 states and 182 transitions. [2022-12-14 08:58:29,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:58:29,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 08:58:29,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:58:29,212 INFO L225 Difference]: With dead ends: 84 [2022-12-14 08:58:29,212 INFO L226 Difference]: Without dead ends: 84 [2022-12-14 08:58:29,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 08:58:29,213 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 7 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 08:58:29,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 7 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:58:29,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-14 08:58:29,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-12-14 08:58:29,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 82 states have (on average 2.2195121951219514) internal successors, (182), 83 states have internal predecessors, (182), 0 states have call successors, (0), 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 08:58:29,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 182 transitions. [2022-12-14 08:58:29,215 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 182 transitions. Word has length 16 [2022-12-14 08:58:29,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:58:29,215 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 182 transitions. [2022-12-14 08:58:29,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:58:29,215 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 182 transitions. [2022-12-14 08:58:29,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 08:58:29,216 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:58:29,216 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:58:29,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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)] Ended with exit code 0 [2022-12-14 08:58:29,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:58:29,417 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 08:58:29,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:58:29,418 INFO L85 PathProgramCache]: Analyzing trace with hash -813631389, now seen corresponding path program 2 times [2022-12-14 08:58:29,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:58:29,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [141771528] [2022-12-14 08:58:29,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:58:29,420 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 08:58:29,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:58:29,422 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:58:29,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:58:29,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 08:58:29,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:58:29,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:58:29,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:58:29,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:58:29,587 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:58:29,587 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:58:29,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [141771528] [2022-12-14 08:58:29,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [141771528] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:58:29,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:58:29,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:58:29,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486140407] [2022-12-14 08:58:29,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:58:29,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:58:29,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:58:29,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:58:29,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:58:29,590 INFO L87 Difference]: Start difference. First operand 84 states and 182 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:58:29,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:58:29,758 INFO L93 Difference]: Finished difference Result 98 states and 204 transitions. [2022-12-14 08:58:29,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:58:29,759 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 08:58:29,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:58:29,759 INFO L225 Difference]: With dead ends: 98 [2022-12-14 08:58:29,759 INFO L226 Difference]: Without dead ends: 88 [2022-12-14 08:58:29,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 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 08:58:29,760 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 20 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:58:29,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 8 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:58:29,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-14 08:58:29,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2022-12-14 08:58:29,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 78 states have (on average 2.2564102564102564) internal successors, (176), 79 states have internal predecessors, (176), 0 states have call successors, (0), 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 08:58:29,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 176 transitions. [2022-12-14 08:58:29,762 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 176 transitions. Word has length 16 [2022-12-14 08:58:29,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:58:29,762 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 176 transitions. [2022-12-14 08:58:29,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:58:29,762 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 176 transitions. [2022-12-14 08:58:29,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 08:58:29,762 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:58:29,762 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:58:29,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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)] Ended with exit code 0 [2022-12-14 08:58:29,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:58:29,964 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 08:58:29,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:58:29,965 INFO L85 PathProgramCache]: Analyzing trace with hash -162891314, now seen corresponding path program 2 times [2022-12-14 08:58:29,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:58:29,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500134355] [2022-12-14 08:58:29,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:58:29,966 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 08:58:29,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:58:29,969 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:58:29,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 (30)] Waiting until timeout for monitored process [2022-12-14 08:58:30,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 08:58:30,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:58:30,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 08:58:30,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:58:30,130 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 08:58:30,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:58:30,172 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 08:58:30,172 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:58:30,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500134355] [2022-12-14 08:58:30,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [500134355] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:58:30,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [426178594] [2022-12-14 08:58:30,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:58:30,172 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:58:30,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:58:30,173 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:58:30,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-12-14 08:58:30,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 08:58:30,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:58:30,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:58:30,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:58:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:58:30,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:58:30,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [426178594] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:58:30,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:58:30,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2022-12-14 08:58:30,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6857895] [2022-12-14 08:58:30,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:58:30,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:58:30,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:58:30,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:58:30,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 08:58:30,383 INFO L87 Difference]: Start difference. First operand 80 states and 176 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:58:30,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:58:30,530 INFO L93 Difference]: Finished difference Result 96 states and 206 transitions. [2022-12-14 08:58:30,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:58:30,531 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 08:58:30,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:58:30,531 INFO L225 Difference]: With dead ends: 96 [2022-12-14 08:58:30,531 INFO L226 Difference]: Without dead ends: 96 [2022-12-14 08:58:30,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 08:58:30,532 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 11 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:58:30,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 5 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:58:30,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-12-14 08:58:30,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 86. [2022-12-14 08:58:30,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 84 states have (on average 2.261904761904762) internal successors, (190), 85 states have internal predecessors, (190), 0 states have call successors, (0), 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 08:58:30,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 190 transitions. [2022-12-14 08:58:30,534 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 190 transitions. Word has length 16 [2022-12-14 08:58:30,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:58:30,534 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 190 transitions. [2022-12-14 08:58:30,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:58:30,534 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 190 transitions. [2022-12-14 08:58:30,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 08:58:30,534 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:58:30,534 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:58:30,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 (30)] Ended with exit code 0 [2022-12-14 08:58:30,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-12-14 08:58:30,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 08:58:30,936 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 08:58:30,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:58:30,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1684993485, now seen corresponding path program 3 times [2022-12-14 08:58:30,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:58:30,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1350814837] [2022-12-14 08:58:30,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:58:30,939 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 08:58:30,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:58:30,940 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:58:30,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 (32)] Waiting until timeout for monitored process [2022-12-14 08:58:31,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 08:58:31,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:58:31,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 08:58:31,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:58:31,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:58:31,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:58:31,094 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:58:31,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1350814837] [2022-12-14 08:58:31,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1350814837] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:58:31,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:58:31,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 08:58:31,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011804107] [2022-12-14 08:58:31,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:58:31,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:58:31,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:58:31,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:58:31,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:58:31,095 INFO L87 Difference]: Start difference. First operand 86 states and 190 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:58:31,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:58:31,298 INFO L93 Difference]: Finished difference Result 102 states and 221 transitions. [2022-12-14 08:58:31,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:58:31,299 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 08:58:31,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:58:31,299 INFO L225 Difference]: With dead ends: 102 [2022-12-14 08:58:31,299 INFO L226 Difference]: Without dead ends: 102 [2022-12-14 08:58:31,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:58:31,299 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 11 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:58:31,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 4 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:58:31,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-12-14 08:58:31,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 90. [2022-12-14 08:58:31,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 88 states have (on average 2.2954545454545454) internal successors, (202), 89 states have internal predecessors, (202), 0 states have call successors, (0), 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 08:58:31,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 202 transitions. [2022-12-14 08:58:31,301 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 202 transitions. Word has length 16 [2022-12-14 08:58:31,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:58:31,302 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 202 transitions. [2022-12-14 08:58:31,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:58:31,302 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 202 transitions. [2022-12-14 08:58:31,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 08:58:31,302 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:58:31,302 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:58:31,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 (32)] Forceful destruction successful, exit code 0 [2022-12-14 08:58:31,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:58:31,503 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 08:58:31,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:58:31,504 INFO L85 PathProgramCache]: Analyzing trace with hash 351935109, now seen corresponding path program 4 times [2022-12-14 08:58:31,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:58:31,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [132820339] [2022-12-14 08:58:31,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 08:58:31,506 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 08:58:31,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:58:31,507 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:58:31,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 (33)] Waiting until timeout for monitored process [2022-12-14 08:58:31,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 08:58:31,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:58:31,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:58:31,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:58:31,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:58:31,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:58:31,645 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:58:31,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [132820339] [2022-12-14 08:58:31,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [132820339] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:58:31,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:58:31,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:58:31,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19911923] [2022-12-14 08:58:31,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:58:31,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:58:31,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:58:31,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:58:31,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:58:31,646 INFO L87 Difference]: Start difference. First operand 90 states and 202 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:58:31,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:58:31,832 INFO L93 Difference]: Finished difference Result 92 states and 206 transitions. [2022-12-14 08:58:31,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:58:31,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 08:58:31,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:58:31,834 INFO L225 Difference]: With dead ends: 92 [2022-12-14 08:58:31,834 INFO L226 Difference]: Without dead ends: 92 [2022-12-14 08:58:31,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:58:31,834 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:58:31,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 6 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:58:31,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-12-14 08:58:31,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2022-12-14 08:58:31,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 78 states have (on average 2.230769230769231) internal successors, (174), 79 states have internal predecessors, (174), 0 states have call successors, (0), 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 08:58:31,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 174 transitions. [2022-12-14 08:58:31,836 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 174 transitions. Word has length 16 [2022-12-14 08:58:31,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:58:31,837 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 174 transitions. [2022-12-14 08:58:31,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:58:31,837 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 174 transitions. [2022-12-14 08:58:31,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 08:58:31,837 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:58:31,837 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:58:31,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 (33)] Ended with exit code 0 [2022-12-14 08:58:32,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:58:32,039 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 08:58:32,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:58:32,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1662635440, now seen corresponding path program 3 times [2022-12-14 08:58:32,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:58:32,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1373095149] [2022-12-14 08:58:32,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:58:32,042 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 08:58:32,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:58:32,045 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:58:32,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:58:32,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 08:58:32,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:58:32,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 08:58:32,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:58:32,183 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 08:58:32,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:58:32,217 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 08:58:32,217 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:58:32,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1373095149] [2022-12-14 08:58:32,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1373095149] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:58:32,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [839568215] [2022-12-14 08:58:32,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:58:32,217 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:58:32,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:58:32,218 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:58:32,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-12-14 08:58:32,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 08:58:32,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:58:32,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:58:32,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:58:32,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:58:32,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:58:32,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [839568215] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:58:32,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:58:32,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2022-12-14 08:58:32,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528436817] [2022-12-14 08:58:32,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:58:32,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:58:32,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:58:32,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:58:32,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 08:58:32,429 INFO L87 Difference]: Start difference. First operand 80 states and 174 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:58:32,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:58:32,614 INFO L93 Difference]: Finished difference Result 88 states and 190 transitions. [2022-12-14 08:58:32,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:58:32,615 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 08:58:32,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:58:32,616 INFO L225 Difference]: With dead ends: 88 [2022-12-14 08:58:32,616 INFO L226 Difference]: Without dead ends: 88 [2022-12-14 08:58:32,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 08:58:32,616 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 7 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 08:58:32,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 7 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:58:32,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-14 08:58:32,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 76. [2022-12-14 08:58:32,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 74 states have (on average 2.189189189189189) internal successors, (162), 75 states have internal predecessors, (162), 0 states have call successors, (0), 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 08:58:32,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 162 transitions. [2022-12-14 08:58:32,618 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 162 transitions. Word has length 16 [2022-12-14 08:58:32,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:58:32,618 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 162 transitions. [2022-12-14 08:58:32,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:58:32,618 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 162 transitions. [2022-12-14 08:58:32,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 08:58:32,618 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:58:32,618 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:58:32,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-12-14 08:58:32,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:58:33,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:58:33,020 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 08:58:33,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:58:33,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1934487162, now seen corresponding path program 1 times [2022-12-14 08:58:33,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:58:33,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1651491003] [2022-12-14 08:58:33,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:58:33,023 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 08:58:33,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:58:33,026 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:58:33,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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)] Waiting until timeout for monitored process [2022-12-14 08:58:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:58:33,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 08:58:33,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:58:33,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:58:33,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:58:33,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:58:33,290 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:58:33,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1651491003] [2022-12-14 08:58:33,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1651491003] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:58:33,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1496798603] [2022-12-14 08:58:33,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:58:33,291 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:58:33,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:58:33,292 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:58:33,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-12-14 08:58:33,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:58:33,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 08:58:33,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:58:33,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:58:33,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:58:33,530 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:58:33,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1496798603] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:58:33,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449959351] [2022-12-14 08:58:33,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:58:33,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:58:33,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:58:33,531 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:58:33,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-14 08:58:33,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:58:33,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 08:58:33,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:58:33,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:58:33,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:58:33,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:58:33,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449959351] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:58:33,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:58:33,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 7, 5, 5, 5] total 12 [2022-12-14 08:58:33,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221100720] [2022-12-14 08:58:33,673 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:58:33,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 08:58:33,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:58:33,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 08:58:33,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 08:58:33,674 INFO L87 Difference]: Start difference. First operand 76 states and 162 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 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 08:58:34,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:58:34,502 INFO L93 Difference]: Finished difference Result 130 states and 292 transitions. [2022-12-14 08:58:34,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 08:58:34,503 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 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 08:58:34,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:58:34,503 INFO L225 Difference]: With dead ends: 130 [2022-12-14 08:58:34,503 INFO L226 Difference]: Without dead ends: 130 [2022-12-14 08:58:34,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2022-12-14 08:58:34,504 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 89 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 08:58:34,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 18 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 08:58:34,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-12-14 08:58:34,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2022-12-14 08:58:34,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 86 states have (on average 2.2325581395348837) internal successors, (192), 87 states have internal predecessors, (192), 0 states have call successors, (0), 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 08:58:34,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 192 transitions. [2022-12-14 08:58:34,506 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 192 transitions. Word has length 17 [2022-12-14 08:58:34,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:58:34,506 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 192 transitions. [2022-12-14 08:58:34,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 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 08:58:34,506 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 192 transitions. [2022-12-14 08:58:34,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 08:58:34,506 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:58:34,506 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:58:34,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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)] Ended with exit code 0 [2022-12-14 08:58:34,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-14 08:58:34,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2022-12-14 08:58:35,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 08:58:35,109 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 08:58:35,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:58:35,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1965133708, now seen corresponding path program 2 times [2022-12-14 08:58:35,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:58:35,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [635600957] [2022-12-14 08:58:35,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:58:35,112 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 08:58:35,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:58:35,114 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:58:35,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 (39)] Waiting until timeout for monitored process [2022-12-14 08:58:35,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 08:58:35,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:58:35,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 08:58:35,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:58:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 08:58:35,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:58:35,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 08:58:35,321 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:58:35,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [635600957] [2022-12-14 08:58:35,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [635600957] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:58:35,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [167440474] [2022-12-14 08:58:35,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:58:35,322 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:58:35,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:58:35,323 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:58:35,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-12-14 08:58:35,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 08:58:35,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:58:35,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 08:58:35,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:58:35,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 08:58:35,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:58:35,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 08:58:35,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [167440474] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:58:35,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437964445] [2022-12-14 08:58:35,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:58:35,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:58:35,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:58:35,578 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:58:35,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-14 08:58:35,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 08:58:35,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:58:35,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 08:58:35,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:58:35,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 08:58:35,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:58:35,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 08:58:35,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437964445] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:58:35,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:58:35,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2022-12-14 08:58:35,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66471219] [2022-12-14 08:58:35,725 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:58:35,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:58:35,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:58:35,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:58:35,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:58:35,726 INFO L87 Difference]: Start difference. First operand 88 states and 192 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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 08:58:36,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:58:36,101 INFO L93 Difference]: Finished difference Result 126 states and 284 transitions. [2022-12-14 08:58:36,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 08:58:36,101 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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 17 [2022-12-14 08:58:36,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:58:36,102 INFO L225 Difference]: With dead ends: 126 [2022-12-14 08:58:36,102 INFO L226 Difference]: Without dead ends: 126 [2022-12-14 08:58:36,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-14 08:58:36,102 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 44 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:58:36,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 11 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:58:36,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-12-14 08:58:36,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 106. [2022-12-14 08:58:36,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 104 states have (on average 2.25) internal successors, (234), 105 states have internal predecessors, (234), 0 states have call successors, (0), 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 08:58:36,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 234 transitions. [2022-12-14 08:58:36,105 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 234 transitions. Word has length 17 [2022-12-14 08:58:36,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:58:36,105 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 234 transitions. [2022-12-14 08:58:36,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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 08:58:36,106 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 234 transitions. [2022-12-14 08:58:36,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 08:58:36,106 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:58:36,106 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:58:36,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 (39)] Forceful destruction successful, exit code 0 [2022-12-14 08:58:36,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2022-12-14 08:58:36,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-12-14 08:58:36,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:58:36,709 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-14 08:58:36,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:58:36,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1205937559, now seen corresponding path program 3 times [2022-12-14 08:58:36,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:58:36,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [260328291] [2022-12-14 08:58:36,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:58:36,711 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 08:58:36,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:58:36,714 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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 08:58:36,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91558c41-1a29-4f53-baf9-705f1e2fffa4/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)] Waiting until timeout for monitored process [2022-12-14 08:58:37,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 08:58:37,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:58:37,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 08:58:37,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:58:37,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:58:37,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:58:37,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:58:37,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:58:37,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:58:37,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:58:37,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:58:37,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:58:38,149 INFO L321 Elim1Store]: treesize reduction 1428, result has 3.3 percent of original size [2022-12-14 08:58:38,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 20 select indices, 20 select index equivalence classes, 6 disjoint index pairs (out of 190 index pairs), introduced 32 new quantified variables, introduced 190 case distinctions, treesize of input 2257 treesize of output 235 [2022-12-14 08:58:38,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 08:58:38,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:58:46,078 WARN L233 SmtUtils]: Spent 7.64s on a formula simplification. DAG size of input: 759 DAG size of output: 192 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-12-14 08:58:46,080 INFO L321 Elim1Store]: treesize reduction 1561, result has 20.7 percent of original size [2022-12-14 08:58:46,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 20 select indices, 20 select index equivalence classes, 0 disjoint index pairs (out of 190 index pairs), introduced 32 new quantified variables, introduced 190 case distinctions, treesize of input 4038 treesize of output 640 [2022-12-14 09:11:43,447 WARN L233 SmtUtils]: Spent 36.13s on a formula simplification that was a NOOP. DAG size: 15228 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)