./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-node-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a 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_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-node-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur --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 b79c2a620eba99d5ba65b548a8599a4feb45877b2c0c8388713c23f9a60bea18 --- 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-38b53e6 [2022-11-26 00:13:27,281 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:13:27,283 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:13:27,306 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:13:27,307 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:13:27,308 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:13:27,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:13:27,312 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:13:27,314 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:13:27,315 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:13:27,316 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:13:27,317 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:13:27,318 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:13:27,319 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:13:27,320 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:13:27,321 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:13:27,322 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:13:27,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:13:27,325 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:13:27,327 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:13:27,329 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:13:27,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:13:27,337 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:13:27,338 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:13:27,341 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:13:27,342 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:13:27,342 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:13:27,343 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:13:27,343 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:13:27,345 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:13:27,345 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:13:27,346 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:13:27,347 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:13:27,348 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:13:27,349 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:13:27,350 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:13:27,360 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:13:27,361 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:13:27,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:13:27,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:13:27,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:13:27,367 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-26 00:13:27,411 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:13:27,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:13:27,412 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:13:27,412 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:13:27,413 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:13:27,413 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:13:27,413 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:13:27,414 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:13:27,414 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:13:27,414 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:13:27,415 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:13:27,415 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:13:27,416 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:13:27,416 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:13:27,416 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:13:27,416 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:13:27,416 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:13:27,417 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:13:27,418 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-26 00:13:27,418 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-26 00:13:27,418 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:13:27,418 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:13:27,419 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 00:13:27,419 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:13:27,419 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:13:27,420 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:13:27,420 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-26 00:13:27,420 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-26 00:13:27,420 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-26 00:13:27,421 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:13:27,421 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 00:13:27,421 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:13:27,421 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:13:27,421 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:13:27,422 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:13:27,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:13:27,422 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:13:27,422 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:13:27,423 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:13:27,423 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:13:27,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:13:27,424 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:13:27,424 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_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b79c2a620eba99d5ba65b548a8599a4feb45877b2c0c8388713c23f9a60bea18 [2022-11-26 00:13:27,813 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:13:27,852 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:13:27,855 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:13:27,856 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:13:27,856 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:13:27,858 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/weaver/chl-node-trans.wvr.c [2022-11-26 00:13:30,989 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:13:31,260 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:13:31,272 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/sv-benchmarks/c/weaver/chl-node-trans.wvr.c [2022-11-26 00:13:31,280 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/data/0748d2012/8070eb6064504025b141a0a41fa55a82/FLAG8c1ace47a [2022-11-26 00:13:31,301 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/data/0748d2012/8070eb6064504025b141a0a41fa55a82 [2022-11-26 00:13:31,308 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:13:31,309 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:13:31,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:13:31,316 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:13:31,320 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:13:31,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:13:31" (1/1) ... [2022-11-26 00:13:31,322 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5eec5c06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:13:31, skipping insertion in model container [2022-11-26 00:13:31,323 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:13:31" (1/1) ... [2022-11-26 00:13:31,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:13:31,367 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:13:31,708 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_c2390e4b-1b71-4a8c-a19b-575b6529920c/sv-benchmarks/c/weaver/chl-node-trans.wvr.c[3945,3958] [2022-11-26 00:13:31,739 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:13:31,757 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-26 00:13:31,760 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@22cce2ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:13:31, skipping insertion in model container [2022-11-26 00:13:31,760 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:13:31,761 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-26 00:13:31,763 INFO L158 Benchmark]: Toolchain (without parser) took 452.82ms. Allocated memory is still 142.6MB. Free memory was 102.2MB in the beginning and 108.1MB in the end (delta: -5.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-26 00:13:31,764 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 115.3MB. Free memory is still 84.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:13:31,765 INFO L158 Benchmark]: CACSL2BoogieTranslator took 445.23ms. Allocated memory is still 142.6MB. Free memory was 102.2MB in the beginning and 108.1MB in the end (delta: -5.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-26 00:13:31,766 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 115.3MB. Free memory is still 84.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 445.23ms. Allocated memory is still 142.6MB. Free memory was 102.2MB in the beginning and 108.1MB in the end (delta: -5.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 118]: 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_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-node-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur --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 b79c2a620eba99d5ba65b548a8599a4feb45877b2c0c8388713c23f9a60bea18 --- 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-38b53e6 [2022-11-26 00:13:34,066 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:13:34,068 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:13:34,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:13:34,114 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:13:34,118 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:13:34,120 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:13:34,121 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:13:34,123 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:13:34,124 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:13:34,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:13:34,126 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:13:34,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:13:34,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:13:34,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:13:34,130 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:13:34,133 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:13:34,139 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:13:34,142 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:13:34,152 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:13:34,158 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:13:34,160 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:13:34,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:13:34,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:13:34,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:13:34,165 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:13:34,166 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:13:34,167 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:13:34,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:13:34,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:13:34,168 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:13:34,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:13:34,170 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:13:34,183 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:13:34,207 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:13:34,207 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:13:34,208 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:13:34,208 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:13:34,208 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:13:34,209 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:13:34,210 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:13:34,215 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-26 00:13:34,258 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:13:34,259 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:13:34,259 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:13:34,260 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:13:34,261 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:13:34,261 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:13:34,261 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:13:34,261 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:13:34,262 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:13:34,262 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:13:34,266 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:13:34,267 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:13:34,267 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-26 00:13:34,268 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-26 00:13:34,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:13:34,268 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:13:34,269 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 00:13:34,269 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:13:34,269 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:13:34,269 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:13:34,270 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-26 00:13:34,270 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-26 00:13:34,270 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-26 00:13:34,270 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:13:34,270 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 00:13:34,271 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-26 00:13:34,271 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-26 00:13:34,271 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:13:34,271 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:13:34,272 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:13:34,272 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-26 00:13:34,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:13:34,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:13:34,273 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:13:34,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:13:34,273 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-26 00:13:34,274 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-26 00:13:34,274 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:13:34,274 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-26 00:13:34,274 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_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b79c2a620eba99d5ba65b548a8599a4feb45877b2c0c8388713c23f9a60bea18 [2022-11-26 00:13:34,705 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:13:34,730 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:13:34,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:13:34,737 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:13:34,737 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:13:34,739 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/weaver/chl-node-trans.wvr.c [2022-11-26 00:13:37,901 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:13:38,131 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:13:38,132 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/sv-benchmarks/c/weaver/chl-node-trans.wvr.c [2022-11-26 00:13:38,140 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/data/06d03e1a8/1d24a4a4e39f47c1aaa0b7933e74a7bc/FLAGff460cb48 [2022-11-26 00:13:38,155 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/data/06d03e1a8/1d24a4a4e39f47c1aaa0b7933e74a7bc [2022-11-26 00:13:38,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:13:38,160 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:13:38,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:13:38,162 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:13:38,169 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:13:38,170 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:13:38" (1/1) ... [2022-11-26 00:13:38,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18ddf560 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:13:38, skipping insertion in model container [2022-11-26 00:13:38,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:13:38" (1/1) ... [2022-11-26 00:13:38,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:13:38,200 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:13:38,407 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_c2390e4b-1b71-4a8c-a19b-575b6529920c/sv-benchmarks/c/weaver/chl-node-trans.wvr.c[3945,3958] [2022-11-26 00:13:38,424 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:13:38,439 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-26 00:13:38,443 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:13:38,467 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_c2390e4b-1b71-4a8c-a19b-575b6529920c/sv-benchmarks/c/weaver/chl-node-trans.wvr.c[3945,3958] [2022-11-26 00:13:38,477 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:13:38,485 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:13:38,515 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_c2390e4b-1b71-4a8c-a19b-575b6529920c/sv-benchmarks/c/weaver/chl-node-trans.wvr.c[3945,3958] [2022-11-26 00:13:38,522 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:13:38,540 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:13:38,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:13:38 WrapperNode [2022-11-26 00:13:38,541 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:13:38,542 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:13:38,542 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:13:38,542 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:13:38,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:13:38" (1/1) ... [2022-11-26 00:13:38,562 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:13:38" (1/1) ... [2022-11-26 00:13:38,597 INFO L138 Inliner]: procedures = 29, calls = 66, calls flagged for inlining = 22, calls inlined = 34, statements flattened = 395 [2022-11-26 00:13:38,597 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:13:38,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:13:38,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:13:38,598 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:13:38,620 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:13:38" (1/1) ... [2022-11-26 00:13:38,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:13:38" (1/1) ... [2022-11-26 00:13:38,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:13:38" (1/1) ... [2022-11-26 00:13:38,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:13:38" (1/1) ... [2022-11-26 00:13:38,653 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:13:38" (1/1) ... [2022-11-26 00:13:38,659 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:13:38" (1/1) ... [2022-11-26 00:13:38,662 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:13:38" (1/1) ... [2022-11-26 00:13:38,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:13:38" (1/1) ... [2022-11-26 00:13:38,669 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:13:38,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:13:38,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:13:38,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:13:38,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:13:38" (1/1) ... [2022-11-26 00:13:38,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:13:38,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:13:38,705 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:13:38,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:13:38,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:13:38,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-26 00:13:38,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-26 00:13:38,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:13:38,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-26 00:13:38,747 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-26 00:13:38,747 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-26 00:13:38,747 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-26 00:13:38,747 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-26 00:13:38,747 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-26 00:13:38,748 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-26 00:13:38,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 00:13:38,748 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:13:38,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:13:38,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-11-26 00:13:38,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:13:38,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-26 00:13:38,751 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-26 00:13:38,938 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:13:38,940 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:13:40,425 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:13:40,446 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:13:40,449 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-26 00:13:40,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:13:40 BoogieIcfgContainer [2022-11-26 00:13:40,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:13:40,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:13:40,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:13:40,459 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:13:40,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:13:38" (1/3) ... [2022-11-26 00:13:40,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72c2c1a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:13:40, skipping insertion in model container [2022-11-26 00:13:40,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:13:38" (2/3) ... [2022-11-26 00:13:40,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72c2c1a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:13:40, skipping insertion in model container [2022-11-26 00:13:40,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:13:40" (3/3) ... [2022-11-26 00:13:40,467 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-trans.wvr.c [2022-11-26 00:13:40,489 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:13:40,489 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 62 error locations. [2022-11-26 00:13:40,490 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-26 00:13:40,692 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-26 00:13:40,762 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-26 00:13:40,789 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 559 places, 590 transitions, 1204 flow [2022-11-26 00:13:40,791 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 559 places, 590 transitions, 1204 flow [2022-11-26 00:13:40,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 559 places, 590 transitions, 1204 flow [2022-11-26 00:13:41,067 INFO L130 PetriNetUnfolder]: 41/587 cut-off events. [2022-11-26 00:13:41,067 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-26 00:13:41,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 600 conditions, 587 events. 41/587 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1032 event pairs, 0 based on Foata normal form. 0/484 useless extension candidates. Maximal degree in co-relation 485. Up to 2 conditions per place. [2022-11-26 00:13:41,097 INFO L119 LiptonReduction]: Number of co-enabled transitions 32370 [2022-11-26 00:15:21,441 WARN L233 SmtUtils]: Spent 5.74s on a formula simplification. DAG size of input: 156 DAG size of output: 155 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-26 00:15:29,628 INFO L134 LiptonReduction]: Checked pairs total: 53242 [2022-11-26 00:15:29,628 INFO L136 LiptonReduction]: Total number of compositions: 719 [2022-11-26 00:15:29,640 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 107 places, 107 transitions, 238 flow [2022-11-26 00:15:30,773 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 22881 states, 15547 states have (on average 5.431594519843056) internal successors, (84445), 22880 states have internal predecessors, (84445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:30,825 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:15:30,829 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;@a6b1954, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:15:30,830 INFO L358 AbstractCegarLoop]: Starting to check reachability of 101 error locations. [2022-11-26 00:15:30,905 INFO L276 IsEmpty]: Start isEmpty. Operand has 22881 states, 15547 states have (on average 5.431594519843056) internal successors, (84445), 22880 states have internal predecessors, (84445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:30,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-26 00:15:30,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:30,913 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-26 00:15:30,914 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-26 00:15:30,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:30,923 INFO L85 PathProgramCache]: Analyzing trace with hash 73114, now seen corresponding path program 1 times [2022-11-26 00:15:30,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:15:30,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1929373202] [2022-11-26 00:15:30,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:30,940 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:15:30,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:15:30,943 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:15:30,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-26 00:15:31,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:31,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:15:31,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:15:31,344 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-26 00:15:31,345 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-26 00:15:31,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:15:31,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:15:31,442 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:15:31,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1929373202] [2022-11-26 00:15:31,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1929373202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:31,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:15:31,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:15:31,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217858411] [2022-11-26 00:15:31,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:31,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:15:31,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:15:31,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:15:31,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:15:31,595 INFO L87 Difference]: Start difference. First operand has 22881 states, 15547 states have (on average 5.431594519843056) internal successors, (84445), 22880 states have internal predecessors, (84445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:33,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:33,001 INFO L93 Difference]: Finished difference Result 16781 states and 61213 transitions. [2022-11-26 00:15:33,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:15:33,003 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-26 00:15:33,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:33,339 INFO L225 Difference]: With dead ends: 16781 [2022-11-26 00:15:33,339 INFO L226 Difference]: Without dead ends: 16781 [2022-11-26 00:15:33,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:15:33,364 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 89 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:33,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 3 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:15:33,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16781 states. [2022-11-26 00:15:34,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16781 to 16781. [2022-11-26 00:15:34,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16781 states, 11591 states have (on average 5.281080148390993) internal successors, (61213), 16780 states have internal predecessors, (61213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:34,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16781 states to 16781 states and 61213 transitions. [2022-11-26 00:15:34,721 INFO L78 Accepts]: Start accepts. Automaton has 16781 states and 61213 transitions. Word has length 2 [2022-11-26 00:15:34,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:34,722 INFO L495 AbstractCegarLoop]: Abstraction has 16781 states and 61213 transitions. [2022-11-26 00:15:34,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:34,724 INFO L276 IsEmpty]: Start isEmpty. Operand 16781 states and 61213 transitions. [2022-11-26 00:15:34,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-26 00:15:34,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:34,737 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-26 00:15:34,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:15:34,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:15:34,938 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-26 00:15:34,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:34,939 INFO L85 PathProgramCache]: Analyzing trace with hash 73115, now seen corresponding path program 1 times [2022-11-26 00:15:34,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:15:34,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1594819347] [2022-11-26 00:15:34,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:34,940 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:15:34,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:15:34,943 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:15:34,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-26 00:15:35,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:35,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 00:15:35,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:15:35,337 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:15:35,338 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:15:35,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:15:35,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:15:35,401 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:15:35,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1594819347] [2022-11-26 00:15:35,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1594819347] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:35,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:15:35,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:15:35,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433935902] [2022-11-26 00:15:35,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:35,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:15:35,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:15:35,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:15:35,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:15:35,405 INFO L87 Difference]: Start difference. First operand 16781 states and 61213 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:36,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:36,639 INFO L93 Difference]: Finished difference Result 16782 states and 61214 transitions. [2022-11-26 00:15:36,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:15:36,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-26 00:15:36,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:36,915 INFO L225 Difference]: With dead ends: 16782 [2022-11-26 00:15:36,915 INFO L226 Difference]: Without dead ends: 16782 [2022-11-26 00:15:36,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:15:36,916 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:36,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:15:36,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16782 states. [2022-11-26 00:15:37,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16782 to 16782. [2022-11-26 00:15:37,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16782 states, 11592 states have (on average 5.280710835058661) internal successors, (61214), 16781 states have internal predecessors, (61214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:37,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16782 states to 16782 states and 61214 transitions. [2022-11-26 00:15:37,685 INFO L78 Accepts]: Start accepts. Automaton has 16782 states and 61214 transitions. Word has length 2 [2022-11-26 00:15:37,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:37,686 INFO L495 AbstractCegarLoop]: Abstraction has 16782 states and 61214 transitions. [2022-11-26 00:15:37,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:37,688 INFO L276 IsEmpty]: Start isEmpty. Operand 16782 states and 61214 transitions. [2022-11-26 00:15:37,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-26 00:15:37,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:37,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-26 00:15:37,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 00:15:37,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:15:37,900 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-26 00:15:37,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:37,900 INFO L85 PathProgramCache]: Analyzing trace with hash 2281338, now seen corresponding path program 1 times [2022-11-26 00:15:37,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:15:37,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [304477042] [2022-11-26 00:15:37,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:37,901 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:15:37,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:15:37,903 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:15:37,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-26 00:15:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:38,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 00:15:38,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:15:38,154 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:15:38,154 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:15:38,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:15:38,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:15:38,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:15:38,520 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:15:38,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [304477042] [2022-11-26 00:15:38,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [304477042] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:15:38,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2110676677] [2022-11-26 00:15:38,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:38,521 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:15:38,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:15:38,523 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:15:38,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-26 00:15:38,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:38,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 00:15:38,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:15:38,942 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:15:38,943 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:15:39,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:15:39,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:15:39,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:15:39,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2110676677] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:15:39,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233296181] [2022-11-26 00:15:39,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:39,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:39,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:15:39,110 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:15:39,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:15:39,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:39,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 00:15:39,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:15:39,358 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:15:39,359 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:15:39,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:15:39,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:15:39,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:15:39,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233296181] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:15:39,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:15:39,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 7 [2022-11-26 00:15:39,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105459914] [2022-11-26 00:15:39,586 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:15:39,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:15:39,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:15:39,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:15:39,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:15:39,588 INFO L87 Difference]: Start difference. First operand 16782 states and 61214 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) [2022-11-26 00:15:44,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:44,261 INFO L93 Difference]: Finished difference Result 16796 states and 61240 transitions. [2022-11-26 00:15:44,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:15:44,262 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 [2022-11-26 00:15:44,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:44,397 INFO L225 Difference]: With dead ends: 16796 [2022-11-26 00:15:44,398 INFO L226 Difference]: Without dead ends: 16796 [2022-11-26 00:15:44,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:15:44,399 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:44,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 18 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-26 00:15:44,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16796 states. [2022-11-26 00:15:45,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16796 to 16793. [2022-11-26 00:15:45,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16793 states, 11603 states have (on average 5.2776006205291734) internal successors, (61236), 16792 states have internal predecessors, (61236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:45,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16793 states to 16793 states and 61236 transitions. [2022-11-26 00:15:45,191 INFO L78 Accepts]: Start accepts. Automaton has 16793 states and 61236 transitions. Word has length 3 [2022-11-26 00:15:45,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:45,192 INFO L495 AbstractCegarLoop]: Abstraction has 16793 states and 61236 transitions. [2022-11-26 00:15:45,192 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) [2022-11-26 00:15:45,192 INFO L276 IsEmpty]: Start isEmpty. Operand 16793 states and 61236 transitions. [2022-11-26 00:15:45,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:15:45,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:45,198 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 00:15:45,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:15:45,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:15:45,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:15:45,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:15:45,805 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-26 00:15:45,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:45,805 INFO L85 PathProgramCache]: Analyzing trace with hash -734551468, now seen corresponding path program 1 times [2022-11-26 00:15:45,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:15:45,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989191172] [2022-11-26 00:15:45,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:45,806 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:15:45,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:15:45,807 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:15:45,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-26 00:15:45,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:45,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:15:45,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:15:45,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-26 00:15:45,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:15:45,940 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:15:45,940 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:15:45,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989191172] [2022-11-26 00:15:45,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989191172] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:45,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:15:45,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:15:45,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707372044] [2022-11-26 00:15:45,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:45,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:15:45,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:15:45,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:15:45,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:15:45,942 INFO L87 Difference]: Start difference. First operand 16793 states and 61236 transitions. Second operand has 3 states, 2 states have (on average 3.0) 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) [2022-11-26 00:15:46,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:46,868 INFO L93 Difference]: Finished difference Result 16790 states and 61233 transitions. [2022-11-26 00:15:46,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:15:46,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) 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 [2022-11-26 00:15:46,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:47,003 INFO L225 Difference]: With dead ends: 16790 [2022-11-26 00:15:47,003 INFO L226 Difference]: Without dead ends: 16790 [2022-11-26 00:15:47,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:15:47,004 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 80 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:47,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 3 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:15:47,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16790 states. [2022-11-26 00:15:47,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16790 to 16790. [2022-11-26 00:15:47,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16790 states, 11603 states have (on average 5.277342066706886) internal successors, (61233), 16789 states have internal predecessors, (61233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:47,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16790 states to 16790 states and 61233 transitions. [2022-11-26 00:15:47,929 INFO L78 Accepts]: Start accepts. Automaton has 16790 states and 61233 transitions. Word has length 6 [2022-11-26 00:15:47,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:47,929 INFO L495 AbstractCegarLoop]: Abstraction has 16790 states and 61233 transitions. [2022-11-26 00:15:47,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) 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) [2022-11-26 00:15:47,929 INFO L276 IsEmpty]: Start isEmpty. Operand 16790 states and 61233 transitions. [2022-11-26 00:15:47,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:15:47,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:47,930 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 00:15:47,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:15:48,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:15:48,143 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-26 00:15:48,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:48,143 INFO L85 PathProgramCache]: Analyzing trace with hash -734551467, now seen corresponding path program 1 times [2022-11-26 00:15:48,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:15:48,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1030874187] [2022-11-26 00:15:48,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:15:48,144 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:15:48,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:15:48,147 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:15:48,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-26 00:15:48,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:15:48,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:15:48,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:15:48,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:15:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:15:48,338 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:15:48,338 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:15:48,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1030874187] [2022-11-26 00:15:48,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1030874187] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:15:48,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:15:48,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:15:48,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806085135] [2022-11-26 00:15:48,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:15:48,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:15:48,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:15:48,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:15:48,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:15:48,340 INFO L87 Difference]: Start difference. First operand 16790 states and 61233 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) [2022-11-26 00:15:49,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:15:49,283 INFO L93 Difference]: Finished difference Result 16791 states and 61235 transitions. [2022-11-26 00:15:49,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:15:49,284 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 [2022-11-26 00:15:49,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:15:49,581 INFO L225 Difference]: With dead ends: 16791 [2022-11-26 00:15:49,581 INFO L226 Difference]: Without dead ends: 16791 [2022-11-26 00:15:49,581 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 [2022-11-26 00:15:49,582 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 90 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:15:49,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 7 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:15:49,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16791 states. [2022-11-26 00:15:50,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16791 to 16791. [2022-11-26 00:15:50,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16791 states, 11604 states have (on average 5.277059634608755) internal successors, (61235), 16790 states have internal predecessors, (61235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:15:50,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16791 states to 16791 states and 61235 transitions. [2022-11-26 00:15:50,203 INFO L78 Accepts]: Start accepts. Automaton has 16791 states and 61235 transitions. Word has length 6 [2022-11-26 00:15:50,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:15:50,204 INFO L495 AbstractCegarLoop]: Abstraction has 16791 states and 61235 transitions. [2022-11-26 00:15:50,204 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) [2022-11-26 00:15:50,204 INFO L276 IsEmpty]: Start isEmpty. Operand 16791 states and 61235 transitions. [2022-11-26 00:15:50,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:15:50,205 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:15:50,205 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-26 00:15:50,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:15:50,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:15:50,417 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-26 00:15:50,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:15:50,419 INFO L85 PathProgramCache]: Analyzing trace with hash -741466789, now seen corresponding path program 2 times [2022-11-26 00:15:50,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:15:50,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [673770261] [2022-11-26 00:15:50,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:15:50,420 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 [2022-11-26 00:15:50,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:15:50,422 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:15:50,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-26 00:15:50,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:15:50,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:15:50,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 00:15:50,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:15:50,694 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:15:50,694 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:15:50,973 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:15:50,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:15:51,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:15:51,805 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:15:51,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [673770261] [2022-11-26 00:15:51,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [673770261] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:15:51,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [855276737] [2022-11-26 00:15:51,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:15:51,806 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:15:51,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:15:51,814 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:15:51,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-26 00:15:52,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:15:52,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:15:52,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:15:52,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:15:52,321 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:15:52,322 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:15:52,561 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:15:52,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:15:52,754 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:15:52,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [855276737] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:15:52,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629464466] [2022-11-26 00:15:52,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:15:52,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:15:52,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:15:52,759 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:15:52,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:15:52,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:15:52,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:15:52,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:15:52,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:15:53,042 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:15:53,042 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:15:53,132 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:15:53,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:15:53,334 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:15:53,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629464466] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:15:53,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:15:53,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2022-11-26 00:15:53,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363143922] [2022-11-26 00:15:53,335 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:15:53,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-26 00:15:53,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:15:53,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-26 00:15:53,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-11-26 00:15:53,336 INFO L87 Difference]: Start difference. First operand 16791 states and 61235 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) [2022-11-26 00:15:58,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:16:00,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:16:02,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:16:04,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:16:07,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:16:09,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:16:10,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:16:16,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:16:16,434 INFO L93 Difference]: Finished difference Result 16810 states and 61271 transitions. [2022-11-26 00:16:16,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 00:16:16,436 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 [2022-11-26 00:16:16,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:16:16,548 INFO L225 Difference]: With dead ends: 16810 [2022-11-26 00:16:16,548 INFO L226 Difference]: Without dead ends: 16810 [2022-11-26 00:16:16,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2022-11-26 00:16:16,550 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 13 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 185 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:16:16,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 21 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 795 Invalid, 4 Unknown, 0 Unchecked, 21.4s Time] [2022-11-26 00:16:16,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16810 states. [2022-11-26 00:16:17,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16810 to 16806. [2022-11-26 00:16:17,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16806 states, 11619 states have (on average 5.272915052930545) internal successors, (61266), 16805 states have internal predecessors, (61266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:16:17,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16806 states to 16806 states and 61266 transitions. [2022-11-26 00:16:17,257 INFO L78 Accepts]: Start accepts. Automaton has 16806 states and 61266 transitions. Word has length 6 [2022-11-26 00:16:17,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:16:17,257 INFO L495 AbstractCegarLoop]: Abstraction has 16806 states and 61266 transitions. [2022-11-26 00:16:17,258 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) [2022-11-26 00:16:17,258 INFO L276 IsEmpty]: Start isEmpty. Operand 16806 states and 61266 transitions. [2022-11-26 00:16:17,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:16:17,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:16:17,259 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:16:17,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:16:17,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:16:17,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:16:17,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 00:16:17,878 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-26 00:16:17,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:16:17,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1296246459, now seen corresponding path program 1 times [2022-11-26 00:16:17,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:16:17,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [193978262] [2022-11-26 00:16:17,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:17,880 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:16:17,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:16:17,882 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:16:17,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-26 00:16:18,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:18,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:16:18,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:16:18,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:16:18,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:16:18,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:16:18,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:16:18,566 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:16:18,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [193978262] [2022-11-26 00:16:18,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [193978262] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:16:18,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2109422743] [2022-11-26 00:16:18,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:18,567 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:16:18,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:16:18,568 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:16:18,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-26 00:16:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:18,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 00:16:18,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:16:19,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:16:19,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:16:19,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:16:19,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2109422743] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:16:19,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932515781] [2022-11-26 00:16:19,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:19,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:16:19,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:16:19,327 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:16:19,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 00:16:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:19,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:16:19,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:16:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:16:19,598 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:16:19,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932515781] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:16:19,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-26 00:16:19,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 5, 5] total 19 [2022-11-26 00:16:19,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858900175] [2022-11-26 00:16:19,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:16:19,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:16:19,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:16:19,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:16:19,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-11-26 00:16:19,600 INFO L87 Difference]: Start difference. First operand 16806 states and 61266 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:16:20,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:16:20,598 INFO L93 Difference]: Finished difference Result 16806 states and 61265 transitions. [2022-11-26 00:16:20,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:16:20,598 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-26 00:16:20,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:16:20,676 INFO L225 Difference]: With dead ends: 16806 [2022-11-26 00:16:20,676 INFO L226 Difference]: Without dead ends: 16806 [2022-11-26 00:16:20,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:16:20,677 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 91 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:16:20,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 10 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:16:20,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16806 states. [2022-11-26 00:16:21,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16806 to 16806. [2022-11-26 00:16:21,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16806 states, 11619 states have (on average 5.272828987004045) internal successors, (61265), 16805 states have internal predecessors, (61265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:16:21,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16806 states to 16806 states and 61265 transitions. [2022-11-26 00:16:21,349 INFO L78 Accepts]: Start accepts. Automaton has 16806 states and 61265 transitions. Word has length 7 [2022-11-26 00:16:21,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:16:21,349 INFO L495 AbstractCegarLoop]: Abstraction has 16806 states and 61265 transitions. [2022-11-26 00:16:21,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:16:21,349 INFO L276 IsEmpty]: Start isEmpty. Operand 16806 states and 61265 transitions. [2022-11-26 00:16:21,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 00:16:21,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:16:21,350 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:16:21,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-26 00:16:21,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 00:16:21,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-11-26 00:16:21,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:16:21,954 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-26 00:16:21,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:16:21,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1609048285, now seen corresponding path program 1 times [2022-11-26 00:16:21,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:16:21,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2058765728] [2022-11-26 00:16:21,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:21,955 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:16:21,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:16:21,956 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:16:21,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-26 00:16:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:22,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:16:22,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:16:22,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:16:22,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:16:22,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:16:22,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:16:22,507 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:16:22,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2058765728] [2022-11-26 00:16:22,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2058765728] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:16:22,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [556371237] [2022-11-26 00:16:22,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:22,507 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:16:22,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:16:22,508 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:16:22,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-26 00:16:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:22,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 00:16:22,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:16:22,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:16:22,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:16:23,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:16:23,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [556371237] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:16:23,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466241115] [2022-11-26 00:16:23,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:23,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:16:23,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:16:23,273 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:16:23,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-26 00:16:23,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:23,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-26 00:16:23,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:16:23,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:16:23,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:16:23,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:16:23,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:16:23,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466241115] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:16:23,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:16:23,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 5, 5, 3, 3] total 19 [2022-11-26 00:16:23,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359504933] [2022-11-26 00:16:23,813 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:16:23,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 00:16:23,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:16:23,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 00:16:23,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:16:23,814 INFO L87 Difference]: Start difference. First operand 16806 states and 61265 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:16:28,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:16:30,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:16:31,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:16:34,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:16:44,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:16:44,048 INFO L93 Difference]: Finished difference Result 134207 states and 489692 transitions. [2022-11-26 00:16:44,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-26 00:16:44,050 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-26 00:16:44,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:16:45,276 INFO L225 Difference]: With dead ends: 134207 [2022-11-26 00:16:45,276 INFO L226 Difference]: Without dead ends: 134207 [2022-11-26 00:16:45,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=415, Invalid=1477, Unknown=0, NotChecked=0, Total=1892 [2022-11-26 00:16:45,278 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3211 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1904 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3211 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 2017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:16:45,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3211 Valid, 69 Invalid, 2017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1904 Invalid, 0 Unknown, 0 Unchecked, 15.9s Time] [2022-11-26 00:16:45,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134207 states. [2022-11-26 00:16:47,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134207 to 16838. [2022-11-26 00:16:47,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16838 states, 11651 states have (on average 5.2645266500729555) internal successors, (61337), 16837 states have internal predecessors, (61337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:16:47,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16838 states to 16838 states and 61337 transitions. [2022-11-26 00:16:47,158 INFO L78 Accepts]: Start accepts. Automaton has 16838 states and 61337 transitions. Word has length 8 [2022-11-26 00:16:47,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:16:47,158 INFO L495 AbstractCegarLoop]: Abstraction has 16838 states and 61337 transitions. [2022-11-26 00:16:47,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:16:47,158 INFO L276 IsEmpty]: Start isEmpty. Operand 16838 states and 61337 transitions. [2022-11-26 00:16:47,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 00:16:47,159 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:16:47,159 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:16:47,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-26 00:16:47,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-26 00:16:47,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -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)] Ended with exit code 0 [2022-11-26 00:16:47,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:16:47,760 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-26 00:16:47,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:16:47,760 INFO L85 PathProgramCache]: Analyzing trace with hash -106605947, now seen corresponding path program 1 times [2022-11-26 00:16:47,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:16:47,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1688300316] [2022-11-26 00:16:47,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:47,761 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:16:47,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:16:47,762 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:16:47,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-26 00:16:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:47,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 00:16:47,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:16:48,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:16:48,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:16:48,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:16:48,324 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:16:48,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1688300316] [2022-11-26 00:16:48,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1688300316] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:16:48,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [851426091] [2022-11-26 00:16:48,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:48,325 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:16:48,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:16:48,327 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:16:48,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-26 00:16:48,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:48,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 00:16:48,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:16:48,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:16:48,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:16:49,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:16:49,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [851426091] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:16:49,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943451245] [2022-11-26 00:16:49,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:49,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:16:49,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:16:49,127 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:16:49,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-26 00:16:49,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:49,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 00:16:49,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:16:49,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:16:49,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:16:49,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:16:49,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943451245] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:16:49,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:16:49,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 17 [2022-11-26 00:16:49,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919687113] [2022-11-26 00:16:49,580 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:16:49,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-26 00:16:49,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:16:49,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-26 00:16:49,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2022-11-26 00:16:49,582 INFO L87 Difference]: Start difference. First operand 16838 states and 61337 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:16:52,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:16:52,186 INFO L93 Difference]: Finished difference Result 33642 states and 122607 transitions. [2022-11-26 00:16:52,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:16:52,187 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-26 00:16:52,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:16:52,575 INFO L225 Difference]: With dead ends: 33642 [2022-11-26 00:16:52,576 INFO L226 Difference]: Without dead ends: 33642 [2022-11-26 00:16:52,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:16:52,577 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 520 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:16:52,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 35 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-26 00:16:52,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33642 states. [2022-11-26 00:16:53,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33642 to 16838. [2022-11-26 00:16:53,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16838 states, 11651 states have (on average 5.264440820530426) internal successors, (61336), 16837 states have internal predecessors, (61336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:16:53,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16838 states to 16838 states and 61336 transitions. [2022-11-26 00:16:53,272 INFO L78 Accepts]: Start accepts. Automaton has 16838 states and 61336 transitions. Word has length 10 [2022-11-26 00:16:53,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:16:53,273 INFO L495 AbstractCegarLoop]: Abstraction has 16838 states and 61336 transitions. [2022-11-26 00:16:53,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:16:53,273 INFO L276 IsEmpty]: Start isEmpty. Operand 16838 states and 61336 transitions. [2022-11-26 00:16:53,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 00:16:53,273 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:16:53,274 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1, 1, 1] [2022-11-26 00:16:53,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-11-26 00:16:53,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-26 00:16:53,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-26 00:16:53,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:16:53,875 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-26 00:16:53,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:16:53,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1273651546, now seen corresponding path program 1 times [2022-11-26 00:16:53,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:16:53,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255109216] [2022-11-26 00:16:53,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:53,876 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:16:53,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:16:53,877 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:16:53,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-26 00:16:54,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:54,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-26 00:16:54,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:16:54,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:16:54,434 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:16:54,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:16:56,598 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:16:56,598 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:16:56,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255109216] [2022-11-26 00:16:56,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255109216] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:16:56,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1645703022] [2022-11-26 00:16:56,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:56,598 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:16:56,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:16:56,599 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:16:56,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-26 00:16:56,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:56,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:16:56,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:16:56,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:16:57,422 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:16:57,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:16:59,684 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:16:59,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1645703022] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:16:59,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292558146] [2022-11-26 00:16:59,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:16:59,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:16:59,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:16:59,695 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:16:59,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-26 00:16:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:16:59,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:16:59,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:17:00,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:17:00,421 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:17:00,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:17:00,999 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:17:01,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292558146] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:17:01,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:17:01,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 36 [2022-11-26 00:17:01,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820142509] [2022-11-26 00:17:01,001 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:17:01,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-26 00:17:01,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:17:01,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-26 00:17:01,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=934, Unknown=0, NotChecked=0, Total=1332 [2022-11-26 00:17:01,003 INFO L87 Difference]: Start difference. First operand 16838 states and 61336 transitions. Second operand has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:06,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:17:08,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:17:09,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:17:11,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:17:13,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:17:15,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:17:17,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:17:19,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:17:21,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:17:23,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:17:24,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:17:26,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:17:28,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:17:31,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:17:37,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:17:38,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:17:40,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:17:42,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:17:43,953 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:17:45,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:17:47,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:17:49,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:17:51,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:17:53,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:17:54,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:17:56,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:17:58,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:18:03,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:18:04,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:18:06,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:18:07,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:18:10,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:18:19,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:19,650 INFO L93 Difference]: Finished difference Result 16869 states and 61393 transitions. [2022-11-26 00:18:19,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-26 00:18:19,652 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-26 00:18:19,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:19,720 INFO L225 Difference]: With dead ends: 16869 [2022-11-26 00:18:19,720 INFO L226 Difference]: Without dead ends: 16869 [2022-11-26 00:18:19,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=742, Invalid=1514, Unknown=0, NotChecked=0, Total=2256 [2022-11-26 00:18:19,721 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 28 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1868 mSolverCounterSat, 262 mSolverCounterUnsat, 21 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 1868 IncrementalHoareTripleChecker+Invalid, 21 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 71.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:19,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 45 Invalid, 2151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 1868 Invalid, 21 Unknown, 0 Unchecked, 71.8s Time] [2022-11-26 00:18:19,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16869 states. [2022-11-26 00:18:20,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16869 to 16861. [2022-11-26 00:18:20,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16861 states, 11674 states have (on average 5.2578379304437215) internal successors, (61380), 16860 states have internal predecessors, (61380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:20,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16861 states to 16861 states and 61380 transitions. [2022-11-26 00:18:20,268 INFO L78 Accepts]: Start accepts. Automaton has 16861 states and 61380 transitions. Word has length 11 [2022-11-26 00:18:20,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:20,268 INFO L495 AbstractCegarLoop]: Abstraction has 16861 states and 61380 transitions. [2022-11-26 00:18:20,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:20,269 INFO L276 IsEmpty]: Start isEmpty. Operand 16861 states and 61380 transitions. [2022-11-26 00:18:20,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 00:18:20,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:20,270 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:20,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-26 00:18:20,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-11-26 00:18:20,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-11-26 00:18:20,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:18:20,875 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-26 00:18:20,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:20,876 INFO L85 PathProgramCache]: Analyzing trace with hash 990053639, now seen corresponding path program 1 times [2022-11-26 00:18:20,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:18:20,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [520426279] [2022-11-26 00:18:20,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:20,877 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:18:20,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:18:20,878 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:18:20,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-26 00:18:21,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:21,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:18:21,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:18:21,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:18:21,149 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:18:21,149 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:18:21,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [520426279] [2022-11-26 00:18:21,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [520426279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:21,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:21,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:18:21,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039064707] [2022-11-26 00:18:21,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:21,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:18:21,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:18:21,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:18:21,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:18:21,151 INFO L87 Difference]: Start difference. First operand 16861 states and 61380 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:22,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:22,168 INFO L93 Difference]: Finished difference Result 16861 states and 61378 transitions. [2022-11-26 00:18:22,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:18:22,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-26 00:18:22,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:22,243 INFO L225 Difference]: With dead ends: 16861 [2022-11-26 00:18:22,243 INFO L226 Difference]: Without dead ends: 16861 [2022-11-26 00:18:22,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:18:22,245 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 89 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:22,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 12 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:18:22,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16861 states. [2022-11-26 00:18:22,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16861 to 16861. [2022-11-26 00:18:22,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16861 states, 11674 states have (on average 5.257666609559705) internal successors, (61378), 16860 states have internal predecessors, (61378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:22,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16861 states to 16861 states and 61378 transitions. [2022-11-26 00:18:22,896 INFO L78 Accepts]: Start accepts. Automaton has 16861 states and 61378 transitions. Word has length 11 [2022-11-26 00:18:22,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:22,896 INFO L495 AbstractCegarLoop]: Abstraction has 16861 states and 61378 transitions. [2022-11-26 00:18:22,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:22,897 INFO L276 IsEmpty]: Start isEmpty. Operand 16861 states and 61378 transitions. [2022-11-26 00:18:22,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 00:18:22,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:22,898 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:22,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-26 00:18:23,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:18:23,103 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-26 00:18:23,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:23,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1080805878, now seen corresponding path program 1 times [2022-11-26 00:18:23,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:18:23,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [39330860] [2022-11-26 00:18:23,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:23,104 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:18:23,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:18:23,106 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:18:23,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-26 00:18:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:23,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 00:18:23,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:18:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:18:23,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:18:23,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:18:23,822 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:18:23,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [39330860] [2022-11-26 00:18:23,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [39330860] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:18:23,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2027985224] [2022-11-26 00:18:23,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:23,822 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:18:23,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:18:23,824 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:18:23,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-26 00:18:24,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:24,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 00:18:24,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:18:24,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:18:24,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:18:24,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:18:24,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2027985224] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:18:24,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162351265] [2022-11-26 00:18:24,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:24,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:18:24,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:18:24,440 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:18:24,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-26 00:18:24,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:24,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:18:24,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:18:24,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:18:24,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:18:24,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162351265] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:24,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-26 00:18:24,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 5, 5, 5] total 15 [2022-11-26 00:18:24,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343435113] [2022-11-26 00:18:24,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:24,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:18:24,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:18:24,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:18:24,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-26 00:18:24,932 INFO L87 Difference]: Start difference. First operand 16861 states and 61378 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-26 00:18:25,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:25,969 INFO L93 Difference]: Finished difference Result 16861 states and 61375 transitions. [2022-11-26 00:18:25,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:18:25,970 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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 12 [2022-11-26 00:18:25,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:26,032 INFO L225 Difference]: With dead ends: 16861 [2022-11-26 00:18:26,032 INFO L226 Difference]: Without dead ends: 16861 [2022-11-26 00:18:26,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-11-26 00:18:26,033 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 83 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:26,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 12 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:18:26,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16861 states. [2022-11-26 00:18:26,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16861 to 16861. [2022-11-26 00:18:26,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16861 states, 11674 states have (on average 5.257409628233682) internal successors, (61375), 16860 states have internal predecessors, (61375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:26,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16861 states to 16861 states and 61375 transitions. [2022-11-26 00:18:26,560 INFO L78 Accepts]: Start accepts. Automaton has 16861 states and 61375 transitions. Word has length 12 [2022-11-26 00:18:26,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:26,560 INFO L495 AbstractCegarLoop]: Abstraction has 16861 states and 61375 transitions. [2022-11-26 00:18:26,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 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) [2022-11-26 00:18:26,561 INFO L276 IsEmpty]: Start isEmpty. Operand 16861 states and 61375 transitions. [2022-11-26 00:18:26,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:18:26,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:26,562 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:26,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-11-26 00:18:26,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-26 00:18:26,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-26 00:18:27,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:18:27,165 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-26 00:18:27,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:27,166 INFO L85 PathProgramCache]: Analyzing trace with hash 854757267, now seen corresponding path program 1 times [2022-11-26 00:18:27,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:18:27,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1874298566] [2022-11-26 00:18:27,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:27,167 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:18:27,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:18:27,167 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:18:27,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-26 00:18:27,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:27,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-26 00:18:27,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:18:27,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:18:27,671 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-26 00:18:27,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-11-26 00:18:27,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:18:27,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-26 00:18:27,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:18:27,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-26 00:18:27,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:18:27,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-26 00:18:27,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:18:27,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-26 00:18:28,003 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-26 00:18:28,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-26 00:18:28,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:18:28,039 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:18:28,039 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:18:28,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1874298566] [2022-11-26 00:18:28,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1874298566] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:28,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:28,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:18:28,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412385045] [2022-11-26 00:18:28,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:28,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:18:28,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:18:28,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:18:28,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:18:28,041 INFO L87 Difference]: Start difference. First operand 16861 states and 61375 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:28,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:28,991 INFO L93 Difference]: Finished difference Result 13250 states and 46912 transitions. [2022-11-26 00:18:28,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:18:28,992 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-26 00:18:28,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:29,050 INFO L225 Difference]: With dead ends: 13250 [2022-11-26 00:18:29,050 INFO L226 Difference]: Without dead ends: 13250 [2022-11-26 00:18:29,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:18:29,051 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 80 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:29,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 3 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:18:29,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13250 states. [2022-11-26 00:18:29,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13250 to 13250. [2022-11-26 00:18:29,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13250 states, 9585 states have (on average 4.894314032342201) internal successors, (46912), 13249 states have internal predecessors, (46912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:29,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13250 states to 13250 states and 46912 transitions. [2022-11-26 00:18:29,559 INFO L78 Accepts]: Start accepts. Automaton has 13250 states and 46912 transitions. Word has length 13 [2022-11-26 00:18:29,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:29,559 INFO L495 AbstractCegarLoop]: Abstraction has 13250 states and 46912 transitions. [2022-11-26 00:18:29,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:29,559 INFO L276 IsEmpty]: Start isEmpty. Operand 13250 states and 46912 transitions. [2022-11-26 00:18:29,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:18:29,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:29,561 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:29,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-26 00:18:29,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:18:29,764 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-26 00:18:29,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:29,765 INFO L85 PathProgramCache]: Analyzing trace with hash 854757268, now seen corresponding path program 1 times [2022-11-26 00:18:29,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:18:29,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747633139] [2022-11-26 00:18:29,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:29,765 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:18:29,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:18:29,767 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:18:29,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-26 00:18:30,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:30,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-26 00:18:30,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:18:30,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:18:30,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:18:30,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:18:30,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:18:30,500 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-26 00:18:30,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-11-26 00:18:30,540 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-26 00:18:30,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-26 00:18:30,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:18:30,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-26 00:18:30,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:18:30,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-26 00:18:30,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-26 00:18:30,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:18:30,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-26 00:18:30,847 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 00:18:30,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 00:18:30,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:18:30,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-26 00:18:31,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:18:31,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-26 00:18:31,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:18:31,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:18:31,234 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:18:31,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747633139] [2022-11-26 00:18:31,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747633139] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:18:31,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:18:31,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:18:31,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221351331] [2022-11-26 00:18:31,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:18:31,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:18:31,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:18:31,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:18:31,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:18:31,236 INFO L87 Difference]: Start difference. First operand 13250 states and 46912 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:32,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:18:32,780 INFO L93 Difference]: Finished difference Result 9639 states and 32449 transitions. [2022-11-26 00:18:32,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:18:32,788 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-26 00:18:32,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:18:32,823 INFO L225 Difference]: With dead ends: 9639 [2022-11-26 00:18:32,823 INFO L226 Difference]: Without dead ends: 9639 [2022-11-26 00:18:32,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:18:32,824 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 240 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:18:32,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 0 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-26 00:18:32,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9639 states. [2022-11-26 00:18:32,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9639 to 9639. [2022-11-26 00:18:33,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9639 states, 7496 states have (on average 4.32884204909285) internal successors, (32449), 9638 states have internal predecessors, (32449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:33,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9639 states to 9639 states and 32449 transitions. [2022-11-26 00:18:33,035 INFO L78 Accepts]: Start accepts. Automaton has 9639 states and 32449 transitions. Word has length 13 [2022-11-26 00:18:33,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:18:33,036 INFO L495 AbstractCegarLoop]: Abstraction has 9639 states and 32449 transitions. [2022-11-26 00:18:33,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:33,036 INFO L276 IsEmpty]: Start isEmpty. Operand 9639 states and 32449 transitions. [2022-11-26 00:18:33,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:18:33,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:18:33,037 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:18:33,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-26 00:18:33,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:18:33,237 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-26 00:18:33,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:18:33,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1661535271, now seen corresponding path program 1 times [2022-11-26 00:18:33,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:18:33,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1160352415] [2022-11-26 00:18:33,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:33,239 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:18:33,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:18:33,240 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:18:33,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-26 00:18:33,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:33,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-26 00:18:33,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:18:33,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:18:33,768 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:18:33,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:18:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:18:35,095 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:18:35,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1160352415] [2022-11-26 00:18:35,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1160352415] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:18:35,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2105613183] [2022-11-26 00:18:35,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:35,096 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:18:35,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:18:35,097 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:18:35,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-26 00:18:35,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:35,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:18:35,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:18:36,310 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:18:36,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:18:37,426 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:18:37,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2105613183] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:18:37,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818570094] [2022-11-26 00:18:37,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:18:37,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:18:37,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:18:37,427 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:18:37,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-26 00:18:37,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:18:37,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-26 00:18:37,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:18:38,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:18:38,532 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:18:38,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:18:39,505 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:18:39,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818570094] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:18:39,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:18:39,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 8, 8, 8] total 36 [2022-11-26 00:18:39,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162975576] [2022-11-26 00:18:39,506 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:18:39,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-26 00:18:39,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:18:39,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-26 00:18:39,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2022-11-26 00:18:39,508 INFO L87 Difference]: Start difference. First operand 9639 states and 32449 transitions. Second operand has 36 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 36 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:18:44,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:18:46,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:18:48,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:18:50,619 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:18:55,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:18:57,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:18:59,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:19:01,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:19:03,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:19:05,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:19:07,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:19:09,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:19:11,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:19:14,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:19:16,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:19:18,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:19:20,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:19:37,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:19:37,157 INFO L93 Difference]: Finished difference Result 28792 states and 97106 transitions. [2022-11-26 00:19:37,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-26 00:19:37,159 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 36 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-26 00:19:37,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:19:37,284 INFO L225 Difference]: With dead ends: 28792 [2022-11-26 00:19:37,284 INFO L226 Difference]: Without dead ends: 28792 [2022-11-26 00:19:37,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=620, Invalid=3040, Unknown=0, NotChecked=0, Total=3660 [2022-11-26 00:19:37,286 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 947 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 2528 mSolverCounterSat, 89 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 947 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 2631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2528 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:19:37,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [947 Valid, 98 Invalid, 2631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 2528 Invalid, 14 Unknown, 0 Unchecked, 48.4s Time] [2022-11-26 00:19:37,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28792 states. [2022-11-26 00:19:37,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28792 to 9676. [2022-11-26 00:19:37,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9676 states, 7533 states have (on average 4.317270675693615) internal successors, (32522), 9675 states have internal predecessors, (32522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:37,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9676 states to 9676 states and 32522 transitions. [2022-11-26 00:19:37,744 INFO L78 Accepts]: Start accepts. Automaton has 9676 states and 32522 transitions. Word has length 13 [2022-11-26 00:19:37,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:19:37,744 INFO L495 AbstractCegarLoop]: Abstraction has 9676 states and 32522 transitions. [2022-11-26 00:19:37,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 36 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:19:37,745 INFO L276 IsEmpty]: Start isEmpty. Operand 9676 states and 32522 transitions. [2022-11-26 00:19:37,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:19:37,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:19:37,745 INFO L195 NwaCegarLoop]: trace histogram [11, 1, 1] [2022-11-26 00:19:37,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-26 00:19:37,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-11-26 00:19:38,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-26 00:19:38,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:19:38,346 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-26 00:19:38,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:19:38,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1024344038, now seen corresponding path program 3 times [2022-11-26 00:19:38,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:19:38,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1886960353] [2022-11-26 00:19:38,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:19:38,348 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:19:38,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:19:38,349 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:19:38,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-26 00:19:38,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-26 00:19:38,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:19:38,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-26 00:19:38,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:19:38,829 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:19:38,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:19:39,690 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:39,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:19:43,747 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:43,747 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:19:43,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1886960353] [2022-11-26 00:19:43,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1886960353] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:19:43,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [929168065] [2022-11-26 00:19:43,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:19:43,748 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:19:43,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:19:43,749 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:19:43,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-26 00:19:45,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-26 00:19:45,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:19:45,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-26 00:19:45,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:19:45,539 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:19:45,540 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:19:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:46,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:19:53,015 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:53,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [929168065] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:19:53,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284163011] [2022-11-26 00:19:53,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:19:53,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:19:53,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:19:53,016 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:19:53,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-26 00:19:57,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-26 00:19:57,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:19:57,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-26 00:19:57,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:19:57,332 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:19:57,333 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:19:57,516 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:57,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:19:58,065 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:19:58,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284163011] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:19:58,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:19:58,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 46 [2022-11-26 00:19:58,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147822749] [2022-11-26 00:19:58,066 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:19:58,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-26 00:19:58,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:19:58,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-26 00:19:58,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=644, Invalid=1612, Unknown=0, NotChecked=0, Total=2256 [2022-11-26 00:19:58,068 INFO L87 Difference]: Start difference. First operand 9676 states and 32522 transitions. Second operand has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:20:18,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:20:20,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:20:22,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:20:24,035 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:20:26,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:20:28,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:20:30,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:20:32,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:20:34,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:20:36,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:20:38,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:20:40,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:20:42,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:20:44,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:20:46,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:20:48,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:20:50,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:20:52,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:20:54,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:20:56,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:20:58,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:21:07,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:21:09,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:21:11,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:21:13,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:21:15,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:21:17,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:21:19,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:21:21,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:21:23,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:21:25,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:21:27,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:21:29,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:21:31,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:21:33,261 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:21:35,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:21:37,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:21:39,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:21:41,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:21:43,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:21:45,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:21:47,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:22:01,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:22:01,907 INFO L93 Difference]: Finished difference Result 9707 states and 32580 transitions. [2022-11-26 00:22:01,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-26 00:22:01,908 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-26 00:22:01,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:22:01,940 INFO L225 Difference]: With dead ends: 9707 [2022-11-26 00:22:01,940 INFO L226 Difference]: Without dead ends: 9707 [2022-11-26 00:22:01,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 32.6s TimeCoverageRelationStatistics Valid=1117, Invalid=2305, Unknown=0, NotChecked=0, Total=3422 [2022-11-26 00:22:01,941 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 38 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 2915 mSolverCounterSat, 720 mSolverCounterUnsat, 42 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 100.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 3677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 720 IncrementalHoareTripleChecker+Valid, 2915 IncrementalHoareTripleChecker+Invalid, 42 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 101.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:22:01,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 57 Invalid, 3677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [720 Valid, 2915 Invalid, 42 Unknown, 0 Unchecked, 101.8s Time] [2022-11-26 00:22:01,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9707 states. [2022-11-26 00:22:02,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9707 to 9692. [2022-11-26 00:22:02,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9692 states, 7549 states have (on average 4.312359252881176) internal successors, (32554), 9691 states have internal predecessors, (32554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:02,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9692 states to 9692 states and 32554 transitions. [2022-11-26 00:22:02,145 INFO L78 Accepts]: Start accepts. Automaton has 9692 states and 32554 transitions. Word has length 13 [2022-11-26 00:22:02,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:22:02,146 INFO L495 AbstractCegarLoop]: Abstraction has 9692 states and 32554 transitions. [2022-11-26 00:22:02,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:02,146 INFO L276 IsEmpty]: Start isEmpty. Operand 9692 states and 32554 transitions. [2022-11-26 00:22:02,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-26 00:22:02,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:22:02,147 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:22:02,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-26 00:22:02,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-26 00:22:02,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-26 00:22:02,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:22:02,754 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-26 00:22:02,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:22:02,754 INFO L85 PathProgramCache]: Analyzing trace with hash 723494619, now seen corresponding path program 1 times [2022-11-26 00:22:02,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:22:02,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1836052535] [2022-11-26 00:22:02,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:02,755 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:22:02,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:22:02,763 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:22:02,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-26 00:22:02,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:02,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 00:22:02,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:22:03,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:22:03,220 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:22:03,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:22:04,273 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:22:04,273 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:22:04,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1836052535] [2022-11-26 00:22:04,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1836052535] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:22:04,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1963973339] [2022-11-26 00:22:04,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:04,273 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:22:04,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:22:04,274 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:22:04,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-26 00:22:04,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:04,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 00:22:04,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:22:05,089 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:22:05,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:22:05,646 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:22:05,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1963973339] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:22:05,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079882815] [2022-11-26 00:22:05,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:22:05,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:22:05,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:22:05,647 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:22:05,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-26 00:22:05,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:22:05,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-26 00:22:05,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:22:05,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-26 00:22:06,260 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:22:06,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:22:08,125 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:22:08,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079882815] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:22:08,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:22:08,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7, 7, 9, 9] total 34 [2022-11-26 00:22:08,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475108275] [2022-11-26 00:22:08,126 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:22:08,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-26 00:22:08,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:22:08,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-26 00:22:08,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2022-11-26 00:22:08,128 INFO L87 Difference]: Start difference. First operand 9692 states and 32554 transitions. Second operand has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:22:14,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:22:16,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:22:18,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:22:20,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:22:22,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:22:24,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:22:26,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:22:28,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:22:32,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:22:34,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:22:36,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:22:38,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:22:40,942 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:22:42,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:22:44,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:22:46,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:22:48,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:22:52,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:22:53,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:22:56,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:23:12,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:23:12,987 INFO L93 Difference]: Finished difference Result 48007 states and 161901 transitions. [2022-11-26 00:23:12,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-26 00:23:12,989 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-26 00:23:12,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:23:13,394 INFO L225 Difference]: With dead ends: 48007 [2022-11-26 00:23:13,394 INFO L226 Difference]: Without dead ends: 48007 [2022-11-26 00:23:13,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=868, Invalid=4244, Unknown=0, NotChecked=0, Total=5112 [2022-11-26 00:23:13,395 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1965 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2252 mSolverCounterSat, 128 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1965 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 2393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 2252 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:23:13,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1965 Valid, 89 Invalid, 2393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 2252 Invalid, 13 Unknown, 0 Unchecked, 52.5s Time] [2022-11-26 00:23:13,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48007 states. [2022-11-26 00:23:13,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48007 to 9815. [2022-11-26 00:23:13,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9815 states, 7672 states have (on average 4.274374348279458) internal successors, (32793), 9814 states have internal predecessors, (32793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:13,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9815 states to 9815 states and 32793 transitions. [2022-11-26 00:23:13,806 INFO L78 Accepts]: Start accepts. Automaton has 9815 states and 32793 transitions. Word has length 14 [2022-11-26 00:23:13,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:23:13,807 INFO L495 AbstractCegarLoop]: Abstraction has 9815 states and 32793 transitions. [2022-11-26 00:23:13,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:13,807 INFO L276 IsEmpty]: Start isEmpty. Operand 9815 states and 32793 transitions. [2022-11-26 00:23:13,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 00:23:13,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:23:13,807 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:23:13,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-26 00:23:14,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-26 00:23:14,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-26 00:23:14,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 00:23:14,408 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-26 00:23:14,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:23:14,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1083029173, now seen corresponding path program 1 times [2022-11-26 00:23:14,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:23:14,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887819258] [2022-11-26 00:23:14,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:23:14,410 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:23:14,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:23:14,411 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:23:14,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 00:23:14,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:23:14,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:23:14,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:23:14,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-26 00:23:14,877 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:23:14,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-26 00:23:14,946 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-26 00:23:14,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-26 00:23:15,005 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-26 00:23:15,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2022-11-26 00:23:15,061 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-26 00:23:15,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2022-11-26 00:23:15,105 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:23:15,105 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:23:15,105 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:23:15,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887819258] [2022-11-26 00:23:15,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887819258] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:23:15,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:23:15,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:23:15,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478539427] [2022-11-26 00:23:15,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:23:15,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:23:15,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:23:15,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:23:15,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:23:15,107 INFO L87 Difference]: Start difference. First operand 9815 states and 32793 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 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) [2022-11-26 00:23:15,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:23:15,811 INFO L93 Difference]: Finished difference Result 7999 states and 26689 transitions. [2022-11-26 00:23:15,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:23:15,811 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 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 [2022-11-26 00:23:15,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:23:15,836 INFO L225 Difference]: With dead ends: 7999 [2022-11-26 00:23:15,836 INFO L226 Difference]: Without dead ends: 7999 [2022-11-26 00:23:15,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:23:15,837 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 144 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:23:15,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 2 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 00:23:15,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7999 states. [2022-11-26 00:23:15,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7999 to 7999. [2022-11-26 00:23:15,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7999 states, 6424 states have (on average 4.154576587795765) internal successors, (26689), 7998 states have internal predecessors, (26689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:23:15,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7999 states to 7999 states and 26689 transitions. [2022-11-26 00:23:15,979 INFO L78 Accepts]: Start accepts. Automaton has 7999 states and 26689 transitions. Word has length 15 [2022-11-26 00:23:15,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:23:15,979 INFO L495 AbstractCegarLoop]: Abstraction has 7999 states and 26689 transitions. [2022-11-26 00:23:15,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 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) [2022-11-26 00:23:15,980 INFO L276 IsEmpty]: Start isEmpty. Operand 7999 states and 26689 transitions. [2022-11-26 00:23:15,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 00:23:15,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:23:15,980 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:23:15,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-26 00:23:16,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:23:16,195 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-26 00:23:16,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:23:16,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1083029174, now seen corresponding path program 1 times [2022-11-26 00:23:16,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:23:16,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [775419456] [2022-11-26 00:23:16,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:23:16,196 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:23:16,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:23:16,197 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:23:16,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-26 00:23:16,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:23:16,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-26 00:23:16,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:23:16,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-26 00:23:16,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:23:17,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:23:17,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:23:17,160 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:23:17,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-26 00:23:17,337 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:23:17,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-26 00:23:17,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:23:17,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:23:17,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:23:17,469 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:23:17,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-26 00:23:17,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:23:17,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:23:17,568 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 00:23:17,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 00:23:17,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:23:17,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:23:21,397 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvmul (_ bv4 32) c_~id_3~0))) (let ((.cse1 (bvadd (_ bv4 32) .cse0 c_~get_5~0.offset))) (and (or (forall ((|v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_197| (_ BitVec 32)) (|v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_199| (_ BitVec 32)) (v_ArrVal_1635 (_ BitVec 1))) (or (not (= (_ bv0 1) (select (store |c_#valid| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_199| v_ArrVal_1635) |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_197|))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_199|))))) (bvule (bvadd .cse0 c_~get_5~0.offset) .cse1)) (forall ((|v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_199| (_ BitVec 32))) (or (forall ((v_ArrVal_1634 (_ BitVec 32)) (|v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_197| (_ BitVec 32)) (v_ArrVal_1635 (_ BitVec 1))) (or (not (= (_ bv0 1) (select (store |c_#valid| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_199| v_ArrVal_1635) |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_197|))) (forall ((v_ArrVal_1638 (_ BitVec 32))) (bvule .cse1 (select (store (store |c_#length| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_199| v_ArrVal_1634) |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_197| v_ArrVal_1638) c_~get_5~0.base))))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_create_fresh_bool_array_~arr~1#1.base_199|)))))))) is different from false [2022-11-26 00:23:27,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:23:27,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:23:27,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-26 00:23:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:23:27,072 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:23:27,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [775419456] [2022-11-26 00:23:27,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [775419456] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:23:27,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [951345609] [2022-11-26 00:23:27,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:23:27,073 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:23:27,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:23:27,075 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:23:27,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-26 00:23:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:23:27,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-26 00:23:27,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:23:27,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:23:27,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-26 00:23:28,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:23:28,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:23:28,129 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:23:28,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-26 00:23:28,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:23:28,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:23:28,466 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-26 00:23:28,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-26 00:23:28,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:23:28,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:23:28,801 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2022-11-26 00:23:28,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2022-11-26 00:23:29,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:23:29,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:23:29,253 INFO L321 Elim1Store]: treesize reduction 24, result has 41.5 percent of original size [2022-11-26 00:23:29,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 40 [2022-11-26 00:23:29,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:23:29,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:23:58,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:23:58,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [951345609] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:23:58,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063405099] [2022-11-26 00:23:58,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:23:58,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:23:58,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:23:58,399 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:23:58,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-26 00:23:58,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:23:58,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-26 00:23:58,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:23:58,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-26 00:23:58,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-26 00:23:58,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:23:58,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:23:58,815 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:23:58,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-26 00:23:58,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:23:58,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:23:58,965 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:23:58,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-26 00:23:59,072 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:23:59,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-26 00:23:59,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:23:59,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:23:59,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:23:59,204 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 00:23:59,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 00:23:59,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:23:59,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:24:27,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:24:27,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063405099] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:24:27,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:24:27,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 7, 7, 7, 8] total 28 [2022-11-26 00:24:27,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120536880] [2022-11-26 00:24:27,330 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:24:27,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-26 00:24:27,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:24:27,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-26 00:24:27,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=587, Unknown=18, NotChecked=52, Total=812 [2022-11-26 00:24:27,332 INFO L87 Difference]: Start difference. First operand 7999 states and 26689 transitions. Second operand has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:24:47,072 WARN L233 SmtUtils]: Spent 6.72s on a formula simplification. DAG size of input: 97 DAG size of output: 95 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:25:00,059 WARN L233 SmtUtils]: Spent 5.12s on a formula simplification. DAG size of input: 97 DAG size of output: 95 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:25:11,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-26 00:25:35,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-26 00:26:02,623 WARN L233 SmtUtils]: Spent 11.66s on a formula simplification. DAG size of input: 145 DAG size of output: 143 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:26:18,696 WARN L233 SmtUtils]: Spent 6.61s on a formula simplification. DAG size of input: 107 DAG size of output: 105 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:26:36,473 WARN L233 SmtUtils]: Spent 5.11s on a formula simplification. DAG size of input: 107 DAG size of output: 105 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:27:18,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:18,952 INFO L93 Difference]: Finished difference Result 31733 states and 106714 transitions. [2022-11-26 00:27:18,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-26 00:27:18,954 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-26 00:27:18,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:19,074 INFO L225 Difference]: With dead ends: 31733 [2022-11-26 00:27:19,075 INFO L226 Difference]: Without dead ends: 31733 [2022-11-26 00:27:19,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 193.1s TimeCoverageRelationStatistics Valid=910, Invalid=2255, Unknown=31, NotChecked=110, Total=3306 [2022-11-26 00:27:19,076 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2160 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 112 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2160 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 1582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 246 IncrementalHoareTripleChecker+Unchecked, 42.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:19,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2160 Valid, 4 Invalid, 1582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1222 Invalid, 2 Unknown, 246 Unchecked, 42.9s Time] [2022-11-26 00:27:19,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31733 states. [2022-11-26 00:27:19,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31733 to 7275. [2022-11-26 00:27:19,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7275 states, 5951 states have (on average 4.006385481431692) internal successors, (23842), 7274 states have internal predecessors, (23842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:27:19,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7275 states to 7275 states and 23842 transitions. [2022-11-26 00:27:19,403 INFO L78 Accepts]: Start accepts. Automaton has 7275 states and 23842 transitions. Word has length 15 [2022-11-26 00:27:19,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:19,403 INFO L495 AbstractCegarLoop]: Abstraction has 7275 states and 23842 transitions. [2022-11-26 00:27:19,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:27:19,404 INFO L276 IsEmpty]: Start isEmpty. Operand 7275 states and 23842 transitions. [2022-11-26 00:27:19,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 00:27:19,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:19,405 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:27:19,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-26 00:27:19,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-11-26 00:27:19,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-26 00:27:20,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:27:20,013 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-26 00:27:20,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:20,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1083029214, now seen corresponding path program 1 times [2022-11-26 00:27:20,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:27:20,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [986284377] [2022-11-26 00:27:20,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:20,014 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:27:20,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:27:20,015 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:27:20,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-26 00:27:20,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:20,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-26 00:27:20,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:27:20,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:27:20,690 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-26 00:27:20,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-26 00:27:20,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:27:20,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-26 00:27:20,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:27:20,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 20 [2022-11-26 00:27:20,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:27:20,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:27:20,996 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:27:20,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 39 [2022-11-26 00:27:21,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:27:21,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:27:21,208 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:27:21,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 39 [2022-11-26 00:27:21,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:27:21,614 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-26 00:27:21,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2022-11-26 00:27:22,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:27:22,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:27:22,078 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:27:22,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [986284377] [2022-11-26 00:27:22,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [986284377] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:27:22,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:27:22,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:27:22,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077928777] [2022-11-26 00:27:22,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:27:22,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:27:22,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:27:22,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:27:22,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:27:22,080 INFO L87 Difference]: Start difference. First operand 7275 states and 23842 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2022-11-26 00:27:24,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:24,289 INFO L93 Difference]: Finished difference Result 7098 states and 23338 transitions. [2022-11-26 00:27:24,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:27:24,290 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 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 [2022-11-26 00:27:24,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:24,310 INFO L225 Difference]: With dead ends: 7098 [2022-11-26 00:27:24,311 INFO L226 Difference]: Without dead ends: 7098 [2022-11-26 00:27:24,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:27:24,311 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 285 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:24,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 3 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-26 00:27:24,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7098 states. [2022-11-26 00:27:24,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7098 to 7098. [2022-11-26 00:27:24,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7098 states, 5874 states have (on average 3.9731018045624786) internal successors, (23338), 7097 states have internal predecessors, (23338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:27:24,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7098 states to 7098 states and 23338 transitions. [2022-11-26 00:27:24,443 INFO L78 Accepts]: Start accepts. Automaton has 7098 states and 23338 transitions. Word has length 15 [2022-11-26 00:27:24,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:24,444 INFO L495 AbstractCegarLoop]: Abstraction has 7098 states and 23338 transitions. [2022-11-26 00:27:24,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2022-11-26 00:27:24,444 INFO L276 IsEmpty]: Start isEmpty. Operand 7098 states and 23338 transitions. [2022-11-26 00:27:24,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 00:27:24,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:24,444 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:27:24,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-26 00:27:24,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:27:24,645 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-26 00:27:24,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:24,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1083028527, now seen corresponding path program 1 times [2022-11-26 00:27:24,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:27:24,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [700616471] [2022-11-26 00:27:24,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:24,646 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:27:24,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:27:24,647 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:27:24,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-26 00:27:25,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:25,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:27:25,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:27:25,214 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-26 00:27:25,214 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-26 00:27:25,263 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:27:25,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-26 00:27:25,379 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-26 00:27:25,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-26 00:27:25,510 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-26 00:27:25,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2022-11-26 00:27:25,596 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-26 00:27:25,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2022-11-26 00:27:25,680 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-26 00:27:25,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2022-11-26 00:27:25,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:27:25,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:27:25,745 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:27:25,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [700616471] [2022-11-26 00:27:25,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [700616471] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:27:25,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:27:25,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:27:25,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480147242] [2022-11-26 00:27:25,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:27:25,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:27:25,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:27:25,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:27:25,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:27:25,747 INFO L87 Difference]: Start difference. First operand 7098 states and 23338 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 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) [2022-11-26 00:27:26,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:26,766 INFO L93 Difference]: Finished difference Result 5792 states and 18839 transitions. [2022-11-26 00:27:26,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:27:26,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 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 [2022-11-26 00:27:26,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:26,784 INFO L225 Difference]: With dead ends: 5792 [2022-11-26 00:27:26,784 INFO L226 Difference]: Without dead ends: 5792 [2022-11-26 00:27:26,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:27:26,784 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 137 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:26,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 1 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:27:26,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5792 states. [2022-11-26 00:27:26,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5792 to 5792. [2022-11-26 00:27:26,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5792 states, 4882 states have (on average 3.8588693158541583) internal successors, (18839), 5791 states have internal predecessors, (18839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:27:26,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5792 states to 5792 states and 18839 transitions. [2022-11-26 00:27:26,888 INFO L78 Accepts]: Start accepts. Automaton has 5792 states and 18839 transitions. Word has length 15 [2022-11-26 00:27:26,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:26,888 INFO L495 AbstractCegarLoop]: Abstraction has 5792 states and 18839 transitions. [2022-11-26 00:27:26,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 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) [2022-11-26 00:27:26,889 INFO L276 IsEmpty]: Start isEmpty. Operand 5792 states and 18839 transitions. [2022-11-26 00:27:26,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 00:27:26,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:26,890 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:27:26,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-26 00:27:27,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:27:27,104 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-26 00:27:27,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:27,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1083029215, now seen corresponding path program 1 times [2022-11-26 00:27:27,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:27:27,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1931070662] [2022-11-26 00:27:27,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:27,105 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:27:27,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:27:27,106 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:27:27,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-26 00:27:27,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:27,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-26 00:27:27,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:27:27,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:27:27,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:27:27,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:27:27,688 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-26 00:27:27,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-26 00:27:27,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-26 00:27:27,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:27:27,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-26 00:27:27,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-26 00:27:27,948 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-26 00:27:27,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-26 00:27:27,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:27:27,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-26 00:27:28,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:27:28,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-26 00:27:28,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:27:28,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-26 00:27:28,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:27:28,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-26 00:27:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-26 00:27:28,660 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:27:28,660 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:27:28,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1931070662] [2022-11-26 00:27:28,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1931070662] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:27:28,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:27:28,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:27:28,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75819840] [2022-11-26 00:27:28,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:27:28,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:27:28,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:27:28,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:27:28,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:27:28,662 INFO L87 Difference]: Start difference. First operand 5792 states and 18839 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 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) [2022-11-26 00:27:30,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:27:30,048 INFO L93 Difference]: Finished difference Result 5633 states and 18389 transitions. [2022-11-26 00:27:30,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:27:30,049 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 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 [2022-11-26 00:27:30,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:27:30,065 INFO L225 Difference]: With dead ends: 5633 [2022-11-26 00:27:30,065 INFO L226 Difference]: Without dead ends: 5633 [2022-11-26 00:27:30,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:27:30,066 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 202 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:27:30,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 0 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-26 00:27:30,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5633 states. [2022-11-26 00:27:30,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5633 to 5633. [2022-11-26 00:27:30,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5633 states, 4811 states have (on average 3.8222822697983787) internal successors, (18389), 5632 states have internal predecessors, (18389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:27:30,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5633 states to 5633 states and 18389 transitions. [2022-11-26 00:27:30,165 INFO L78 Accepts]: Start accepts. Automaton has 5633 states and 18389 transitions. Word has length 15 [2022-11-26 00:27:30,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:27:30,166 INFO L495 AbstractCegarLoop]: Abstraction has 5633 states and 18389 transitions. [2022-11-26 00:27:30,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 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) [2022-11-26 00:27:30,166 INFO L276 IsEmpty]: Start isEmpty. Operand 5633 states and 18389 transitions. [2022-11-26 00:27:30,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-26 00:27:30,166 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:27:30,167 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:27:30,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-26 00:27:30,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:27:30,367 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 98 more)] === [2022-11-26 00:27:30,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:27:30,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1083028528, now seen corresponding path program 1 times [2022-11-26 00:27:30,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:27:30,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [67801556] [2022-11-26 00:27:30,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:27:30,368 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:27:30,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:27:30,369 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:27:30,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-26 00:27:30,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:27:30,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-26 00:27:30,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:27:31,062 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:27:31,063 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:27:31,275 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-26 00:27:31,275 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-26 00:27:31,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:27:31,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:27:31,567 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:27:31,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-26 00:27:31,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:27:31,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:27:31,829 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-26 00:27:31,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-26 00:27:32,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:27:32,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:27:33,100 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2022-11-26 00:27:33,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2022-11-26 00:27:33,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:27:33,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:27:33,438 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2022-11-26 00:27:33,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2022-11-26 00:27:33,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:27:33,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:27:33,707 INFO L321 Elim1Store]: treesize reduction 18, result has 41.9 percent of original size [2022-11-26 00:27:33,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 31 [2022-11-26 00:27:33,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:27:33,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:28:08,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:28:08,024 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:28:08,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [67801556] [2022-11-26 00:28:08,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [67801556] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:28:08,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1961186897] [2022-11-26 00:28:08,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:28:08,024 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:28:08,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:28:08,030 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:28:08,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2390e4b-1b71-4a8c-a19b-575b6529920c/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-26 00:28:08,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:28:08,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-26 00:28:08,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:28:08,986 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:28:08,986 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:28:09,212 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-26 00:28:09,213 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-26 00:28:09,709 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-26 00:28:09,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-26 00:28:09,770 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-26 00:28:09,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-26 00:28:10,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:10,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:28:10,124 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-26 00:28:10,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-26 00:28:10,512 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2022-11-26 00:28:10,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 59 [2022-11-26 00:28:10,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:28:11,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:11,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:28:11,364 INFO L321 Elim1Store]: treesize reduction 88, result has 33.8 percent of original size [2022-11-26 00:28:11,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 75 [2022-11-26 00:28:12,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:28:12,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-26 00:28:12,198 INFO L321 Elim1Store]: treesize reduction 30, result has 41.2 percent of original size [2022-11-26 00:28:12,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 49 [2022-11-26 00:28:12,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-26 00:28:12,310 INFO L328 TraceCheckSpWp]: Computing backward predicates...