./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-name-comparator-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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d --- 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 [2022-11-25 22:15:42,207 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:15:42,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:15:42,251 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:15:42,253 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:15:42,256 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:15:42,258 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:15:42,260 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:15:42,261 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:15:42,262 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:15:42,263 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:15:42,264 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:15:42,265 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:15:42,266 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:15:42,267 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:15:42,271 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:15:42,273 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:15:42,278 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:15:42,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:15:42,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:15:42,291 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:15:42,293 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:15:42,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:15:42,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:15:42,303 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:15:42,304 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:15:42,304 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:15:42,306 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:15:42,306 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:15:42,308 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:15:42,309 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:15:42,309 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:15:42,312 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:15:42,313 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:15:42,314 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:15:42,314 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:15:42,315 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:15:42,315 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:15:42,315 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:15:42,317 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:15:42,318 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:15:42,319 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-25 22:15:42,370 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:15:42,370 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:15:42,371 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:15:42,371 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:15:42,372 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:15:42,372 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:15:42,372 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:15:42,373 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:15:42,373 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:15:42,373 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 22:15:42,373 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:15:42,374 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:15:42,374 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 22:15:42,374 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 22:15:42,374 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:15:42,375 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 22:15:42,375 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 22:15:42,375 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 22:15:42,376 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 22:15:42,376 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 22:15:42,376 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:15:42,377 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:15:42,377 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 22:15:42,377 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:15:42,377 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:15:42,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:15:42,378 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 22:15:42,378 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 22:15:42,378 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 22:15:42,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:15:42,379 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 22:15:42,379 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:15:42,379 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:15:42,380 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:15:42,380 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:15:42,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:15:42,380 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:15:42,381 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 22:15:42,381 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:15:42,381 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 22:15:42,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 22:15:42,387 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:15:42,387 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_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d [2022-11-25 22:15:42,664 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:15:42,691 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:15:42,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:15:42,695 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:15:42,696 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:15:42,697 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2022-11-25 22:15:45,852 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:15:46,055 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:15:46,056 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2022-11-25 22:15:46,064 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/data/ef96556be/e0fedb80379e41e8a01df9ead1e6fa0c/FLAG5825cf021 [2022-11-25 22:15:46,083 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/data/ef96556be/e0fedb80379e41e8a01df9ead1e6fa0c [2022-11-25 22:15:46,088 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:15:46,091 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:15:46,092 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:15:46,093 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:15:46,098 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:15:46,100 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:15:46" (1/1) ... [2022-11-25 22:15:46,101 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cf6954e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:15:46, skipping insertion in model container [2022-11-25 22:15:46,101 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:15:46" (1/1) ... [2022-11-25 22:15:46,110 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:15:46,138 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:15:46,329 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_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4788,4801] [2022-11-25 22:15:46,341 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:15:46,358 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) [2022-11-25 22:15:46,359 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@243d9f25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:15:46, skipping insertion in model container [2022-11-25 22:15:46,359 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:15:46,360 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-25 22:15:46,362 INFO L158 Benchmark]: Toolchain (without parser) took 269.89ms. Allocated memory is still 134.2MB. Free memory was 94.1MB in the beginning and 83.2MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 22:15:46,362 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 134.2MB. Free memory was 103.4MB in the beginning and 103.2MB in the end (delta: 176.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 22:15:46,363 INFO L158 Benchmark]: CACSL2BoogieTranslator took 267.22ms. Allocated memory is still 134.2MB. Free memory was 93.6MB in the beginning and 83.7MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 22:15:46,365 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 134.2MB. Free memory was 103.4MB in the beginning and 103.2MB in the end (delta: 176.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 267.22ms. Allocated memory is still 134.2MB. Free memory was 93.6MB in the beginning and 83.7MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 151]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d --- 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 [2022-11-25 22:15:48,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 22:15:48,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 22:15:48,665 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 22:15:48,669 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 22:15:48,673 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 22:15:48,674 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 22:15:48,677 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 22:15:48,680 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 22:15:48,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 22:15:48,685 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 22:15:48,688 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 22:15:48,689 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 22:15:48,694 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 22:15:48,695 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 22:15:48,697 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 22:15:48,699 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 22:15:48,700 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 22:15:48,702 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 22:15:48,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 22:15:48,713 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 22:15:48,714 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 22:15:48,718 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 22:15:48,719 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 22:15:48,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 22:15:48,727 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 22:15:48,728 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 22:15:48,729 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 22:15:48,730 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 22:15:48,731 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 22:15:48,732 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 22:15:48,733 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 22:15:48,734 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 22:15:48,736 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 22:15:48,737 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 22:15:48,738 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 22:15:48,738 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 22:15:48,739 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 22:15:48,739 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 22:15:48,740 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 22:15:48,741 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 22:15:48,741 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-25 22:15:48,784 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 22:15:48,784 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 22:15:48,784 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 22:15:48,785 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 22:15:48,785 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 22:15:48,785 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 22:15:48,786 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 22:15:48,786 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 22:15:48,786 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 22:15:48,786 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 22:15:48,786 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 22:15:48,787 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 22:15:48,787 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 22:15:48,787 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 22:15:48,788 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 22:15:48,788 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 22:15:48,788 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 22:15:48,788 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 22:15:48,788 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 22:15:48,789 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 22:15:48,789 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 22:15:48,789 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 22:15:48,789 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 22:15:48,789 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 22:15:48,789 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 22:15:48,790 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 22:15:48,790 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 22:15:48,790 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 22:15:48,790 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 22:15:48,790 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 22:15:48,791 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 22:15:48,791 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 22:15:48,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:15:48,791 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 22:15:48,791 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 22:15:48,792 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-25 22:15:48,792 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 22:15:48,792 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 22:15:48,792 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 22:15:48,792 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_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d [2022-11-25 22:15:49,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 22:15:49,239 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 22:15:49,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 22:15:49,245 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 22:15:49,246 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 22:15:49,247 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2022-11-25 22:15:52,211 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 22:15:52,483 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 22:15:52,484 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2022-11-25 22:15:52,491 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/data/c58df0480/10a25ac060344f5c9ad9b399f985f8f8/FLAG0f10799e0 [2022-11-25 22:15:52,507 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/data/c58df0480/10a25ac060344f5c9ad9b399f985f8f8 [2022-11-25 22:15:52,509 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 22:15:52,511 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 22:15:52,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 22:15:52,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 22:15:52,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 22:15:52,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:15:52" (1/1) ... [2022-11-25 22:15:52,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24c362b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:15:52, skipping insertion in model container [2022-11-25 22:15:52,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 10:15:52" (1/1) ... [2022-11-25 22:15:52,531 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 22:15:52,578 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:15:52,848 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_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4788,4801] [2022-11-25 22:15:52,874 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:15:52,891 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-25 22:15:52,900 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 22:15:52,939 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_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4788,4801] [2022-11-25 22:15:52,953 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:15:52,965 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 22:15:53,017 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_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4788,4801] [2022-11-25 22:15:53,026 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 22:15:53,052 INFO L208 MainTranslator]: Completed translation [2022-11-25 22:15:53,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:15:53 WrapperNode [2022-11-25 22:15:53,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 22:15:53,054 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 22:15:53,055 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 22:15:53,055 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 22:15:53,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:15:53" (1/1) ... [2022-11-25 22:15:53,091 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:15:53" (1/1) ... [2022-11-25 22:15:53,140 INFO L138 Inliner]: procedures = 28, calls = 44, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 278 [2022-11-25 22:15:53,140 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 22:15:53,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 22:15:53,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 22:15:53,141 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 22:15:53,150 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:15:53" (1/1) ... [2022-11-25 22:15:53,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:15:53" (1/1) ... [2022-11-25 22:15:53,155 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:15:53" (1/1) ... [2022-11-25 22:15:53,156 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:15:53" (1/1) ... [2022-11-25 22:15:53,166 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:15:53" (1/1) ... [2022-11-25 22:15:53,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:15:53" (1/1) ... [2022-11-25 22:15:53,173 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:15:53" (1/1) ... [2022-11-25 22:15:53,175 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:15:53" (1/1) ... [2022-11-25 22:15:53,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 22:15:53,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 22:15:53,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 22:15:53,180 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 22:15:53,181 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:15:53" (1/1) ... [2022-11-25 22:15:53,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 22:15:53,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:15:53,225 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 22:15:53,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 22:15:53,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 22:15:53,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 22:15:53,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 22:15:53,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-25 22:15:53,276 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 22:15:53,276 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 22:15:53,276 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 22:15:53,276 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 22:15:53,277 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 22:15:53,277 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 22:15:53,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 22:15:53,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 22:15:53,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 22:15:53,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 22:15:53,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-25 22:15:53,280 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 22:15:53,519 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 22:15:53,521 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 22:15:54,231 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 22:15:54,243 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 22:15:54,243 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 22:15:54,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:15:54 BoogieIcfgContainer [2022-11-25 22:15:54,246 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 22:15:54,248 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 22:15:54,248 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 22:15:54,252 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 22:15:54,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 10:15:52" (1/3) ... [2022-11-25 22:15:54,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14c5384a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:15:54, skipping insertion in model container [2022-11-25 22:15:54,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 10:15:53" (2/3) ... [2022-11-25 22:15:54,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14c5384a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 10:15:54, skipping insertion in model container [2022-11-25 22:15:54,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 10:15:54" (3/3) ... [2022-11-25 22:15:54,254 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-trans.wvr.c [2022-11-25 22:15:54,287 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 22:15:54,287 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2022-11-25 22:15:54,288 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 22:15:54,475 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 22:15:54,518 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 22:15:54,534 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 364 places, 380 transitions, 784 flow [2022-11-25 22:15:54,544 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 364 places, 380 transitions, 784 flow [2022-11-25 22:15:54,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 364 places, 380 transitions, 784 flow [2022-11-25 22:15:54,752 INFO L130 PetriNetUnfolder]: 26/377 cut-off events. [2022-11-25 22:15:54,752 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 22:15:54,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 390 conditions, 377 events. 26/377 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 994 event pairs, 0 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 269. Up to 2 conditions per place. [2022-11-25 22:15:54,788 INFO L119 LiptonReduction]: Number of co-enabled transitions 37914 [2022-11-25 22:16:32,596 WARN L233 SmtUtils]: Spent 7.05s on a formula simplification. DAG size of input: 157 DAG size of output: 156 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 22:16:39,296 WARN L233 SmtUtils]: Spent 5.91s on a formula simplification. DAG size of input: 163 DAG size of output: 162 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 22:16:40,484 INFO L134 LiptonReduction]: Checked pairs total: 34726 [2022-11-25 22:16:40,484 INFO L136 LiptonReduction]: Total number of compositions: 442 [2022-11-25 22:16:40,491 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 55 places, 49 transitions, 122 flow [2022-11-25 22:16:40,577 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 750 states, 616 states have (on average 4.165584415584416) internal successors, (2566), 749 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:40,598 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 22:16:40,603 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;@6250c0d2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 22:16:40,604 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2022-11-25 22:16:40,607 INFO L276 IsEmpty]: Start isEmpty. Operand has 750 states, 616 states have (on average 4.165584415584416) internal successors, (2566), 749 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:40,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-25 22:16:40,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:16:40,611 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-25 22:16:40,611 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 22:16:40,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:16:40,616 INFO L85 PathProgramCache]: Analyzing trace with hash 49895, now seen corresponding path program 1 times [2022-11-25 22:16:40,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 22:16:40,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1603723427] [2022-11-25 22:16:40,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:40,639 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 [2022-11-25 22:16:40,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 22:16:40,645 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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) [2022-11-25 22:16:40,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:16:40,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:40,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 22:16:40,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:16:40,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:16:40,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:16:40,882 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 22:16:40,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1603723427] [2022-11-25 22:16:40,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1603723427] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:16:40,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:16:40,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 22:16:40,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179922500] [2022-11-25 22:16:40,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:16:40,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:16:40,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 22:16:40,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:16:40,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:16:40,943 INFO L87 Difference]: Start difference. First operand has 750 states, 616 states have (on average 4.165584415584416) internal successors, (2566), 749 states have internal predecessors, (2566), 0 states have call successors, (0), 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) [2022-11-25 22:16:41,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:16:41,327 INFO L93 Difference]: Finished difference Result 752 states and 2568 transitions. [2022-11-25 22:16:41,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:16:41,329 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 [2022-11-25 22:16:41,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:16:41,361 INFO L225 Difference]: With dead ends: 752 [2022-11-25 22:16:41,361 INFO L226 Difference]: Without dead ends: 752 [2022-11-25 22:16:41,362 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 [2022-11-25 22:16:41,368 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:16:41,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:16:41,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-11-25 22:16:41,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 750. [2022-11-25 22:16:41,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 617 states have (on average 4.162074554294976) internal successors, (2568), 749 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:41,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2568 transitions. [2022-11-25 22:16:41,486 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2568 transitions. Word has length 2 [2022-11-25 22:16:41,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:16:41,486 INFO L495 AbstractCegarLoop]: Abstraction has 750 states and 2568 transitions. [2022-11-25 22:16:41,487 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) [2022-11-25 22:16:41,487 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2568 transitions. [2022-11-25 22:16:41,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-25 22:16:41,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:16:41,488 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-25 22:16:41,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:16:41,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:16:41,703 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 22:16:41,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:16:41,704 INFO L85 PathProgramCache]: Analyzing trace with hash 49672, now seen corresponding path program 1 times [2022-11-25 22:16:41,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 22:16:41,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1996279343] [2022-11-25 22:16:41,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:41,704 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 [2022-11-25 22:16:41,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 22:16:41,705 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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) [2022-11-25 22:16:41,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:16:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:41,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 22:16:41,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:16:41,944 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 22:16:41,945 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 [2022-11-25 22:16:41,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:16:41,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:16:41,975 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 22:16:41,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1996279343] [2022-11-25 22:16:41,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1996279343] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:16:41,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:16:41,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 22:16:41,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528394220] [2022-11-25 22:16:41,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:16:41,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:16:41,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 22:16:41,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:16:41,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:16:41,979 INFO L87 Difference]: Start difference. First operand 750 states and 2568 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) [2022-11-25 22:16:42,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:16:42,225 INFO L93 Difference]: Finished difference Result 749 states and 2566 transitions. [2022-11-25 22:16:42,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:16:42,226 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 [2022-11-25 22:16:42,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:16:42,232 INFO L225 Difference]: With dead ends: 749 [2022-11-25 22:16:42,232 INFO L226 Difference]: Without dead ends: 749 [2022-11-25 22:16:42,232 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 [2022-11-25 22:16:42,233 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:16:42,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 0 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:16:42,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-11-25 22:16:42,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2022-11-25 22:16:42,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 617 states have (on average 4.158833063209076) internal successors, (2566), 748 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:42,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2566 transitions. [2022-11-25 22:16:42,264 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2566 transitions. Word has length 2 [2022-11-25 22:16:42,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:16:42,264 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 2566 transitions. [2022-11-25 22:16:42,264 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) [2022-11-25 22:16:42,265 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2566 transitions. [2022-11-25 22:16:42,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-25 22:16:42,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:16:42,265 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-25 22:16:42,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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)] Forceful destruction successful, exit code 0 [2022-11-25 22:16:42,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:16:42,477 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 22:16:42,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:16:42,477 INFO L85 PathProgramCache]: Analyzing trace with hash 49673, now seen corresponding path program 1 times [2022-11-25 22:16:42,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 22:16:42,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [593275158] [2022-11-25 22:16:42,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:42,478 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 [2022-11-25 22:16:42,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 22:16:42,479 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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) [2022-11-25 22:16:42,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:16:42,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:42,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 22:16:42,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:16:42,691 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 22:16:42,692 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 42 [2022-11-25 22:16:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:16:42,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:16:42,734 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 22:16:42,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [593275158] [2022-11-25 22:16:42,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [593275158] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:16:42,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:16:42,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 22:16:42,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677207809] [2022-11-25 22:16:42,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:16:42,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:16:42,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 22:16:42,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:16:42,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:16:42,736 INFO L87 Difference]: Start difference. First operand 749 states and 2566 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) [2022-11-25 22:16:43,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:16:43,016 INFO L93 Difference]: Finished difference Result 749 states and 2565 transitions. [2022-11-25 22:16:43,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:16:43,017 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 [2022-11-25 22:16:43,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:16:43,022 INFO L225 Difference]: With dead ends: 749 [2022-11-25 22:16:43,022 INFO L226 Difference]: Without dead ends: 749 [2022-11-25 22:16:43,023 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 [2022-11-25 22:16:43,028 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:16:43,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:16:43,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-11-25 22:16:43,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2022-11-25 22:16:43,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 617 states have (on average 4.157212317666127) internal successors, (2565), 748 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:43,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2565 transitions. [2022-11-25 22:16:43,081 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2565 transitions. Word has length 2 [2022-11-25 22:16:43,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:16:43,082 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 2565 transitions. [2022-11-25 22:16:43,082 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) [2022-11-25 22:16:43,082 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2565 transitions. [2022-11-25 22:16:43,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-25 22:16:43,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:16:43,083 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-25 22:16:43,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:16:43,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:16:43,295 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 22:16:43,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:16:43,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1546327, now seen corresponding path program 1 times [2022-11-25 22:16:43,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 22:16:43,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1116827680] [2022-11-25 22:16:43,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:43,297 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 [2022-11-25 22:16:43,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 22:16:43,298 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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) [2022-11-25 22:16:43,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 (5)] Waiting until timeout for monitored process [2022-11-25 22:16:43,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:43,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 22:16:43,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:16:43,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:16:43,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:16:43,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:16:43,476 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 22:16:43,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1116827680] [2022-11-25 22:16:43,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1116827680] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:16:43,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1284493166] [2022-11-25 22:16:43,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:43,477 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 22:16:43,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 22:16:43,484 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 22:16:43,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-11-25 22:16:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:43,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 22:16:43,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:16:43,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:16:43,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:16:43,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:16:43,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1284493166] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:16:43,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132967190] [2022-11-25 22:16:43,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:43,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:16:43,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:16:43,689 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:16:43,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 22:16:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:43,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 22:16:43,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:16:43,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:16:43,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:16:43,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:16:43,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132967190] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:16:43,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 22:16:43,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 4 [2022-11-25 22:16:43,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068727658] [2022-11-25 22:16:43,820 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 22:16:43,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 22:16:43,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 22:16:43,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 22:16:43,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:16:43,822 INFO L87 Difference]: Start difference. First operand 749 states and 2565 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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) [2022-11-25 22:16:44,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:16:44,234 INFO L93 Difference]: Finished difference Result 752 states and 2569 transitions. [2022-11-25 22:16:44,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:16:44,236 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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 3 [2022-11-25 22:16:44,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:16:44,241 INFO L225 Difference]: With dead ends: 752 [2022-11-25 22:16:44,241 INFO L226 Difference]: Without dead ends: 752 [2022-11-25 22:16:44,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:16:44,242 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:16:44,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 0 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:16:44,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-11-25 22:16:44,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 751. [2022-11-25 22:16:44,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 619 states have (on average 4.150242326332795) internal successors, (2569), 750 states have internal predecessors, (2569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:44,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2569 transitions. [2022-11-25 22:16:44,273 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2569 transitions. Word has length 3 [2022-11-25 22:16:44,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:16:44,274 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 2569 transitions. [2022-11-25 22:16:44,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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) [2022-11-25 22:16:44,274 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2569 transitions. [2022-11-25 22:16:44,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-25 22:16:44,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:16:44,275 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-25 22:16:44,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 22:16:44,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2022-11-25 22:16:44,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 (5)] Forceful destruction successful, exit code 0 [2022-11-25 22:16:44,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:16:44,881 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 22:16:44,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:16:44,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1546105, now seen corresponding path program 1 times [2022-11-25 22:16:44,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 22:16:44,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [831830257] [2022-11-25 22:16:44,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:44,882 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 [2022-11-25 22:16:44,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 22:16:44,883 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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) [2022-11-25 22:16:44,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:16:44,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:44,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 22:16:44,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:16:45,105 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 22:16:45,105 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 42 [2022-11-25 22:16:45,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:16:45,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:16:45,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:16:45,304 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 22:16:45,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [831830257] [2022-11-25 22:16:45,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [831830257] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:16:45,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [823940068] [2022-11-25 22:16:45,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:45,304 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 22:16:45,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 22:16:45,306 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 22:16:45,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-25 22:16:45,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:45,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 22:16:45,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:16:45,568 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 22:16:45,569 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 42 [2022-11-25 22:16:45,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:16:45,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:16:45,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:16:45,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [823940068] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:16:45,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470967182] [2022-11-25 22:16:45,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:45,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:16:45,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:16:45,648 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:16:45,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 22:16:45,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:45,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 22:16:45,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:16:45,858 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 22:16:45,859 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 42 [2022-11-25 22:16:45,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:16:45,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:16:45,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:16:45,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470967182] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:16:45,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 22:16:45,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 4 [2022-11-25 22:16:45,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513280372] [2022-11-25 22:16:45,921 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 22:16:45,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 22:16:45,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 22:16:45,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 22:16:45,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:16:45,922 INFO L87 Difference]: Start difference. First operand 751 states and 2569 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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) [2022-11-25 22:16:46,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:16:46,523 INFO L93 Difference]: Finished difference Result 751 states and 2567 transitions. [2022-11-25 22:16:46,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:16:46,524 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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 3 [2022-11-25 22:16:46,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:16:46,530 INFO L225 Difference]: With dead ends: 751 [2022-11-25 22:16:46,530 INFO L226 Difference]: Without dead ends: 751 [2022-11-25 22:16:46,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 22:16:46,532 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:16:46,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 22:16:46,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-11-25 22:16:46,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 751. [2022-11-25 22:16:46,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 619 states have (on average 4.147011308562197) internal successors, (2567), 750 states have internal predecessors, (2567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:46,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2567 transitions. [2022-11-25 22:16:46,573 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2567 transitions. Word has length 3 [2022-11-25 22:16:46,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:16:46,573 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 2567 transitions. [2022-11-25 22:16:46,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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) [2022-11-25 22:16:46,573 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2567 transitions. [2022-11-25 22:16:46,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 22:16:46,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:16:46,574 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1] [2022-11-25 22:16:46,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-25 22:16:46,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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)] Ended with exit code 0 [2022-11-25 22:16:46,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-25 22:16:47,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:16:47,177 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 22:16:47,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:16:47,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1486006871, now seen corresponding path program 2 times [2022-11-25 22:16:47,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 22:16:47,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1757262722] [2022-11-25 22:16:47,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 22:16:47,179 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 [2022-11-25 22:16:47,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 22:16:47,180 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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) [2022-11-25 22:16:47,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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)] Waiting until timeout for monitored process [2022-11-25 22:16:47,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 22:16:47,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:16:47,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 22:16:47,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:16:47,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:47,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:47,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:47,369 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-25 22:16:47,369 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 3 case distinctions, treesize of input 15 treesize of output 33 [2022-11-25 22:16:47,402 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-25 22:16:47,402 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 [2022-11-25 22:16:47,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:16:47,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:16:47,541 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 22:16:47,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1757262722] [2022-11-25 22:16:47,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1757262722] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:16:47,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:16:47,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 22:16:47,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455253555] [2022-11-25 22:16:47,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:16:47,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:16:47,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 22:16:47,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:16:47,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:16:47,544 INFO L87 Difference]: Start difference. First operand 751 states and 2567 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:47,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:16:47,759 INFO L93 Difference]: Finished difference Result 625 states and 2066 transitions. [2022-11-25 22:16:47,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:16:47,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-25 22:16:47,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:16:47,763 INFO L225 Difference]: With dead ends: 625 [2022-11-25 22:16:47,764 INFO L226 Difference]: Without dead ends: 625 [2022-11-25 22:16:47,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:16:47,764 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:16:47,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 0 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:16:47,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-11-25 22:16:47,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 625. [2022-11-25 22:16:47,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 521 states have (on average 3.965451055662188) internal successors, (2066), 624 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:47,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 2066 transitions. [2022-11-25 22:16:47,784 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 2066 transitions. Word has length 5 [2022-11-25 22:16:47,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:16:47,785 INFO L495 AbstractCegarLoop]: Abstraction has 625 states and 2066 transitions. [2022-11-25 22:16:47,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:47,785 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 2066 transitions. [2022-11-25 22:16:47,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 22:16:47,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:16:47,786 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1] [2022-11-25 22:16:47,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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)] Ended with exit code 0 [2022-11-25 22:16:47,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:16:47,996 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 22:16:47,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:16:47,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1486006873, now seen corresponding path program 1 times [2022-11-25 22:16:47,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 22:16:47,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [681940045] [2022-11-25 22:16:47,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:47,998 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 [2022-11-25 22:16:47,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 22:16:47,999 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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) [2022-11-25 22:16:48,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:16:48,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:48,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 22:16:48,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:16:48,221 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2022-11-25 22:16:48,221 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 6 case distinctions, treesize of input 38 treesize of output 51 [2022-11-25 22:16:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:16:48,312 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:16:48,313 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 22:16:48,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [681940045] [2022-11-25 22:16:48,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [681940045] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:16:48,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:16:48,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 22:16:48,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456564627] [2022-11-25 22:16:48,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:16:48,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:16:48,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 22:16:48,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:16:48,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:16:48,315 INFO L87 Difference]: Start difference. First operand 625 states and 2066 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:48,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:16:48,518 INFO L93 Difference]: Finished difference Result 499 states and 1565 transitions. [2022-11-25 22:16:48,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:16:48,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-25 22:16:48,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:16:48,521 INFO L225 Difference]: With dead ends: 499 [2022-11-25 22:16:48,522 INFO L226 Difference]: Without dead ends: 499 [2022-11-25 22:16:48,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:16:48,522 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:16:48,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 0 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:16:48,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-11-25 22:16:48,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 499. [2022-11-25 22:16:48,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 423 states have (on average 3.699763593380615) internal successors, (1565), 498 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:48,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1565 transitions. [2022-11-25 22:16:48,546 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1565 transitions. Word has length 5 [2022-11-25 22:16:48,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:16:48,546 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 1565 transitions. [2022-11-25 22:16:48,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:48,547 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1565 transitions. [2022-11-25 22:16:48,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 22:16:48,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:16:48,547 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1] [2022-11-25 22:16:48,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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)] Forceful destruction successful, exit code 0 [2022-11-25 22:16:48,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:16:48,759 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 22:16:48,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:16:48,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1486006649, now seen corresponding path program 2 times [2022-11-25 22:16:48,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 22:16:48,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1117778501] [2022-11-25 22:16:48,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 22:16:48,760 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 [2022-11-25 22:16:48,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 22:16:48,761 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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) [2022-11-25 22:16:48,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 (13)] Waiting until timeout for monitored process [2022-11-25 22:16:48,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 22:16:48,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:16:48,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 22:16:48,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:16:48,990 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 22:16:48,990 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 [2022-11-25 22:16:49,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:16:49,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:16:49,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:16:49,662 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 22:16:49,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1117778501] [2022-11-25 22:16:49,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1117778501] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:16:49,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1574150861] [2022-11-25 22:16:49,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 22:16:49,663 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 22:16:49,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 22:16:49,664 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 22:16:49,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-25 22:16:49,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 22:16:49,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:16:49,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 22:16:49,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:16:49,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:16:49,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:16:50,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:16:50,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1574150861] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:16:50,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654769533] [2022-11-25 22:16:50,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 22:16:50,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:16:50,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:16:50,310 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:16:50,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 22:16:50,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 22:16:50,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:16:50,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 22:16:50,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:16:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:16:50,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:16:50,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 22:16:50,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654769533] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:16:50,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 22:16:50,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 16 [2022-11-25 22:16:50,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239548469] [2022-11-25 22:16:50,480 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 22:16:50,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 22:16:50,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 22:16:50,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 22:16:50,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2022-11-25 22:16:50,483 INFO L87 Difference]: Start difference. First operand 499 states and 1565 transitions. Second operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:51,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:16:51,100 INFO L93 Difference]: Finished difference Result 498 states and 1563 transitions. [2022-11-25 22:16:51,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 22:16:51,101 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-25 22:16:51,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:16:51,104 INFO L225 Difference]: With dead ends: 498 [2022-11-25 22:16:51,104 INFO L226 Difference]: Without dead ends: 498 [2022-11-25 22:16:51,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2022-11-25 22:16:51,105 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 144 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:16:51,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 0 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 22:16:51,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-11-25 22:16:51,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 498. [2022-11-25 22:16:51,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 423 states have (on average 3.6950354609929077) internal successors, (1563), 497 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:51,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1563 transitions. [2022-11-25 22:16:51,149 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1563 transitions. Word has length 5 [2022-11-25 22:16:51,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:16:51,149 INFO L495 AbstractCegarLoop]: Abstraction has 498 states and 1563 transitions. [2022-11-25 22:16:51,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:51,150 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1563 transitions. [2022-11-25 22:16:51,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 22:16:51,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:16:51,151 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1] [2022-11-25 22:16:51,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 (13)] Forceful destruction successful, exit code 0 [2022-11-25 22:16:51,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 22:16:51,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-11-25 22:16:51,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-25 22:16:51,763 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 22:16:51,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:16:51,764 INFO L85 PathProgramCache]: Analyzing trace with hash 2123496743, now seen corresponding path program 1 times [2022-11-25 22:16:51,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 22:16:51,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [847543816] [2022-11-25 22:16:51,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:51,765 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 [2022-11-25 22:16:51,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 22:16:51,766 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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) [2022-11-25 22:16:51,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 (16)] Waiting until timeout for monitored process [2022-11-25 22:16:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:51,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 22:16:51,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:16:51,988 INFO L321 Elim1Store]: treesize reduction 101, result has 20.5 percent of original size [2022-11-25 22:16:51,989 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 4 case distinctions, treesize of input 29 treesize of output 44 [2022-11-25 22:16:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:16:52,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:16:52,023 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 22:16:52,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [847543816] [2022-11-25 22:16:52,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [847543816] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:16:52,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:16:52,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 22:16:52,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566168037] [2022-11-25 22:16:52,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:16:52,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:16:52,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 22:16:52,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:16:52,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:16:52,025 INFO L87 Difference]: Start difference. First operand 498 states and 1563 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:52,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:16:52,198 INFO L93 Difference]: Finished difference Result 468 states and 1478 transitions. [2022-11-25 22:16:52,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:16:52,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-25 22:16:52,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:16:52,204 INFO L225 Difference]: With dead ends: 468 [2022-11-25 22:16:52,204 INFO L226 Difference]: Without dead ends: 468 [2022-11-25 22:16:52,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:16:52,204 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 32 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:16:52,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 0 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:16:52,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-11-25 22:16:52,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 468. [2022-11-25 22:16:52,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 405 states have (on average 3.6493827160493826) internal successors, (1478), 467 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:52,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1478 transitions. [2022-11-25 22:16:52,236 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1478 transitions. Word has length 7 [2022-11-25 22:16:52,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:16:52,237 INFO L495 AbstractCegarLoop]: Abstraction has 468 states and 1478 transitions. [2022-11-25 22:16:52,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:52,237 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1478 transitions. [2022-11-25 22:16:52,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 22:16:52,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:16:52,238 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1] [2022-11-25 22:16:52,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 (16)] Forceful destruction successful, exit code 0 [2022-11-25 22:16:52,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:16:52,450 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 22:16:52,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:16:52,450 INFO L85 PathProgramCache]: Analyzing trace with hash 2123496744, now seen corresponding path program 1 times [2022-11-25 22:16:52,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 22:16:52,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1186286661] [2022-11-25 22:16:52,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:52,451 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 22:16:52,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 22:16:52,452 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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) [2022-11-25 22:16:52,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 (17)] Waiting until timeout for monitored process [2022-11-25 22:16:52,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:52,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 22:16:52,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:16:52,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:52,701 INFO L321 Elim1Store]: treesize reduction 59, result has 36.6 percent of original size [2022-11-25 22:16:52,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 39 [2022-11-25 22:16:52,715 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 39 treesize of output 37 [2022-11-25 22:16:52,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:16:52,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:16:52,869 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 22:16:52,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1186286661] [2022-11-25 22:16:52,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1186286661] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:16:52,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:16:52,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 22:16:52,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212775031] [2022-11-25 22:16:52,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:16:52,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:16:52,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 22:16:52,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:16:52,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:16:52,870 INFO L87 Difference]: Start difference. First operand 468 states and 1478 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:53,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:16:53,052 INFO L93 Difference]: Finished difference Result 438 states and 1393 transitions. [2022-11-25 22:16:53,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:16:53,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-25 22:16:53,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:16:53,056 INFO L225 Difference]: With dead ends: 438 [2022-11-25 22:16:53,056 INFO L226 Difference]: Without dead ends: 438 [2022-11-25 22:16:53,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:16:53,057 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:16:53,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 0 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:16:53,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-11-25 22:16:53,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 438. [2022-11-25 22:16:53,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 387 states have (on average 3.599483204134367) internal successors, (1393), 437 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:53,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1393 transitions. [2022-11-25 22:16:53,075 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1393 transitions. Word has length 7 [2022-11-25 22:16:53,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:16:53,075 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 1393 transitions. [2022-11-25 22:16:53,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:53,076 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1393 transitions. [2022-11-25 22:16:53,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 22:16:53,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:16:53,076 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1] [2022-11-25 22:16:53,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 (17)] Forceful destruction successful, exit code 0 [2022-11-25 22:16:53,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:16:53,289 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 22:16:53,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:16:53,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1403888311, now seen corresponding path program 1 times [2022-11-25 22:16:53,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 22:16:53,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1823896258] [2022-11-25 22:16:53,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:53,290 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 [2022-11-25 22:16:53,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 22:16:53,291 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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) [2022-11-25 22:16:53,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:16:53,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:53,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 22:16:53,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:16:53,518 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 22:16:53,519 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 [2022-11-25 22:16:53,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:16:53,551 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:16:53,551 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 22:16:53,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1823896258] [2022-11-25 22:16:53,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1823896258] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:16:53,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:16:53,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 22:16:53,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799509087] [2022-11-25 22:16:53,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:16:53,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:16:53,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 22:16:53,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:16:53,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:16:53,553 INFO L87 Difference]: Start difference. First operand 438 states and 1393 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) [2022-11-25 22:16:53,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:16:53,758 INFO L93 Difference]: Finished difference Result 256 states and 792 transitions. [2022-11-25 22:16:53,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:16:53,759 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 8 [2022-11-25 22:16:53,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:16:53,761 INFO L225 Difference]: With dead ends: 256 [2022-11-25 22:16:53,761 INFO L226 Difference]: Without dead ends: 256 [2022-11-25 22:16:53,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:16:53,762 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 55 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:16:53,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 0 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:16:53,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-11-25 22:16:53,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2022-11-25 22:16:53,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 236 states have (on average 3.3559322033898304) internal successors, (792), 255 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:53,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 792 transitions. [2022-11-25 22:16:53,771 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 792 transitions. Word has length 8 [2022-11-25 22:16:53,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:16:53,771 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 792 transitions. [2022-11-25 22:16:53,771 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) [2022-11-25 22:16:53,771 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 792 transitions. [2022-11-25 22:16:53,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 22:16:53,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:16:53,772 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1] [2022-11-25 22:16:53,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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)] Forceful destruction successful, exit code 0 [2022-11-25 22:16:53,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:16:53,984 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 22:16:53,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:16:53,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1403888312, now seen corresponding path program 1 times [2022-11-25 22:16:53,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 22:16:53,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765450521] [2022-11-25 22:16:53,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:53,984 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 [2022-11-25 22:16:53,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 22:16:53,985 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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) [2022-11-25 22:16:53,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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)] Waiting until timeout for monitored process [2022-11-25 22:16:54,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:54,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 22:16:54,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:16:54,230 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 22:16:54,231 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 42 [2022-11-25 22:16:54,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:16:54,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:16:54,314 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 22:16:54,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765450521] [2022-11-25 22:16:54,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765450521] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:16:54,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:16:54,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:16:54,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646689774] [2022-11-25 22:16:54,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:16:54,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:16:54,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 22:16:54,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:16:54,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:16:54,316 INFO L87 Difference]: Start difference. First operand 256 states and 792 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:54,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:16:54,656 INFO L93 Difference]: Finished difference Result 406 states and 1250 transitions. [2022-11-25 22:16:54,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:16:54,656 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-25 22:16:54,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:16:54,660 INFO L225 Difference]: With dead ends: 406 [2022-11-25 22:16:54,660 INFO L226 Difference]: Without dead ends: 406 [2022-11-25 22:16:54,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:16:54,660 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 99 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:16:54,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 0 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:16:54,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-11-25 22:16:54,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 306. [2022-11-25 22:16:54,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 286 states have (on average 3.5174825174825175) internal successors, (1006), 305 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:54,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 1006 transitions. [2022-11-25 22:16:54,672 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 1006 transitions. Word has length 8 [2022-11-25 22:16:54,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:16:54,673 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 1006 transitions. [2022-11-25 22:16:54,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:54,673 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 1006 transitions. [2022-11-25 22:16:54,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 22:16:54,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:16:54,674 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-25 22:16:54,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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)] Forceful destruction successful, exit code 0 [2022-11-25 22:16:54,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:16:54,885 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 22:16:54,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:16:54,886 INFO L85 PathProgramCache]: Analyzing trace with hash 570866252, now seen corresponding path program 1 times [2022-11-25 22:16:54,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 22:16:54,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1795758668] [2022-11-25 22:16:54,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:54,887 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 22:16:54,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 22:16:54,888 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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) [2022-11-25 22:16:54,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 (20)] Waiting until timeout for monitored process [2022-11-25 22:16:55,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:55,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 22:16:55,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:16:55,138 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 22:16:55,138 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 42 [2022-11-25 22:16:55,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:16:55,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:16:55,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:16:55,526 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 22:16:55,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1795758668] [2022-11-25 22:16:55,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1795758668] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:16:55,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1035311899] [2022-11-25 22:16:55,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:55,526 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 22:16:55,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 22:16:55,527 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 22:16:55,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-25 22:16:55,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:55,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 22:16:55,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:16:55,869 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 22:16:55,870 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 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-25 22:16:55,924 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:16:55,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:16:56,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:16:56,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1035311899] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:16:56,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527577380] [2022-11-25 22:16:56,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:56,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:16:56,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:16:56,012 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:16:56,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 22:16:56,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:56,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 22:16:56,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:16:56,270 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 22:16:56,270 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 42 [2022-11-25 22:16:56,326 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:16:56,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:16:56,416 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:16:56,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527577380] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:16:56,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 22:16:56,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 8 [2022-11-25 22:16:56,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004947858] [2022-11-25 22:16:56,417 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 22:16:56,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 22:16:56,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 22:16:56,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 22:16:56,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-25 22:16:56,418 INFO L87 Difference]: Start difference. First operand 306 states and 1006 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:57,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:16:57,392 INFO L93 Difference]: Finished difference Result 706 states and 2166 transitions. [2022-11-25 22:16:57,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 22:16:57,393 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 22:16:57,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:16:57,397 INFO L225 Difference]: With dead ends: 706 [2022-11-25 22:16:57,397 INFO L226 Difference]: Without dead ends: 706 [2022-11-25 22:16:57,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-11-25 22:16:57,399 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 372 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 22:16:57,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 0 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 22:16:57,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-11-25 22:16:57,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 406. [2022-11-25 22:16:57,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 386 states have (on average 3.715025906735751) internal successors, (1434), 405 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:57,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1434 transitions. [2022-11-25 22:16:57,416 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1434 transitions. Word has length 9 [2022-11-25 22:16:57,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:16:57,416 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 1434 transitions. [2022-11-25 22:16:57,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:57,417 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1434 transitions. [2022-11-25 22:16:57,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 22:16:57,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:16:57,417 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-25 22:16:57,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-25 22:16:57,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-25 22:16:57,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 (20)] Ended with exit code 0 [2022-11-25 22:16:58,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:16:58,021 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 22:16:58,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:16:58,022 INFO L85 PathProgramCache]: Analyzing trace with hash 570938380, now seen corresponding path program 1 times [2022-11-25 22:16:58,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 22:16:58,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [816111753] [2022-11-25 22:16:58,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:58,022 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 [2022-11-25 22:16:58,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 22:16:58,023 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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) [2022-11-25 22:16:58,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 (23)] Waiting until timeout for monitored process [2022-11-25 22:16:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:58,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 22:16:58,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:16:58,240 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-25 22:16:58,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 29 [2022-11-25 22:16:58,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:16:58,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:16:58,273 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 22:16:58,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [816111753] [2022-11-25 22:16:58,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [816111753] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:16:58,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:16:58,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 22:16:58,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364802066] [2022-11-25 22:16:58,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:16:58,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:16:58,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 22:16:58,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:16:58,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:16:58,276 INFO L87 Difference]: Start difference. First operand 406 states and 1434 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:58,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:16:58,425 INFO L93 Difference]: Finished difference Result 374 states and 1330 transitions. [2022-11-25 22:16:58,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:16:58,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 22:16:58,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:16:58,428 INFO L225 Difference]: With dead ends: 374 [2022-11-25 22:16:58,428 INFO L226 Difference]: Without dead ends: 374 [2022-11-25 22:16:58,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:16:58,429 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:16:58,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 0 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:16:58,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-11-25 22:16:58,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 374. [2022-11-25 22:16:58,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 360 states have (on average 3.6944444444444446) internal successors, (1330), 373 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:58,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1330 transitions. [2022-11-25 22:16:58,441 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1330 transitions. Word has length 9 [2022-11-25 22:16:58,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:16:58,442 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 1330 transitions. [2022-11-25 22:16:58,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:58,442 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1330 transitions. [2022-11-25 22:16:58,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 22:16:58,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:16:58,443 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-25 22:16:58,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 (23)] Forceful destruction successful, exit code 0 [2022-11-25 22:16:58,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:16:58,655 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 22:16:58,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:16:58,655 INFO L85 PathProgramCache]: Analyzing trace with hash 570938379, now seen corresponding path program 1 times [2022-11-25 22:16:58,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 22:16:58,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [91023274] [2022-11-25 22:16:58,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:58,656 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 [2022-11-25 22:16:58,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 22:16:58,657 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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) [2022-11-25 22:16:58,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:16:58,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:58,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 22:16:58,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:16:58,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:16:58,924 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-25 22:16:58,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-25 22:16:58,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 84 [2022-11-25 22:16:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:16:59,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:16:59,023 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 22:16:59,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [91023274] [2022-11-25 22:16:59,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [91023274] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:16:59,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:16:59,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 22:16:59,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538337583] [2022-11-25 22:16:59,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:16:59,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 22:16:59,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 22:16:59,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 22:16:59,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:16:59,025 INFO L87 Difference]: Start difference. First operand 374 states and 1330 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:59,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:16:59,174 INFO L93 Difference]: Finished difference Result 342 states and 1226 transitions. [2022-11-25 22:16:59,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 22:16:59,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 22:16:59,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:16:59,177 INFO L225 Difference]: With dead ends: 342 [2022-11-25 22:16:59,177 INFO L226 Difference]: Without dead ends: 342 [2022-11-25 22:16:59,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 22:16:59,178 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 22:16:59,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 0 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 22:16:59,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-11-25 22:16:59,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 342. [2022-11-25 22:16:59,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 334 states have (on average 3.6706586826347305) internal successors, (1226), 341 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:59,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1226 transitions. [2022-11-25 22:16:59,197 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1226 transitions. Word has length 9 [2022-11-25 22:16:59,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:16:59,198 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 1226 transitions. [2022-11-25 22:16:59,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:16:59,198 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1226 transitions. [2022-11-25 22:16:59,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 22:16:59,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:16:59,198 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:16:59,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:16:59,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:16:59,399 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 22:16:59,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:16:59,399 INFO L85 PathProgramCache]: Analyzing trace with hash 519220848, now seen corresponding path program 1 times [2022-11-25 22:16:59,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 22:16:59,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [652699200] [2022-11-25 22:16:59,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:16:59,400 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 [2022-11-25 22:16:59,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 22:16:59,401 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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) [2022-11-25 22:16:59,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:16:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:16:59,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 22:16:59,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:16:59,657 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 22:16:59,657 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 42 [2022-11-25 22:16:59,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:16:59,735 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:16:59,735 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 22:16:59,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [652699200] [2022-11-25 22:16:59,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [652699200] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:16:59,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:16:59,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:16:59,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492540559] [2022-11-25 22:16:59,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:16:59,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:16:59,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 22:16:59,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:16:59,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:16:59,737 INFO L87 Difference]: Start difference. First operand 342 states and 1226 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:00,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:00,067 INFO L93 Difference]: Finished difference Result 508 states and 1828 transitions. [2022-11-25 22:17:00,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:17:00,068 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-25 22:17:00,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:00,071 INFO L225 Difference]: With dead ends: 508 [2022-11-25 22:17:00,072 INFO L226 Difference]: Without dead ends: 508 [2022-11-25 22:17:00,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:17:00,072 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 70 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:00,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 0 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:17:00,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-11-25 22:17:00,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 420. [2022-11-25 22:17:00,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 412 states have (on average 3.8737864077669903) internal successors, (1596), 419 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:00,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1596 transitions. [2022-11-25 22:17:00,087 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1596 transitions. Word has length 10 [2022-11-25 22:17:00,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:00,088 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 1596 transitions. [2022-11-25 22:17:00,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:00,088 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1596 transitions. [2022-11-25 22:17:00,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 22:17:00,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:00,089 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2022-11-25 22:17:00,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:17:00,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:17:00,300 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 22:17:00,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:00,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1153296436, now seen corresponding path program 2 times [2022-11-25 22:17:00,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 22:17:00,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [671210029] [2022-11-25 22:17:00,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 22:17:00,302 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 [2022-11-25 22:17:00,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 22:17:00,303 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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) [2022-11-25 22:17:00,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 (26)] Waiting until timeout for monitored process [2022-11-25 22:17:00,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 22:17:00,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:17:00,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 22:17:00,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:00,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:17:00,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:17:00,600 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:17:00,601 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 22:17:00,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [671210029] [2022-11-25 22:17:00,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [671210029] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:17:00,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2065926459] [2022-11-25 22:17:00,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 22:17:00,601 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 22:17:00,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 22:17:00,604 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 22:17:00,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-25 22:17:00,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 22:17:00,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:17:00,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 22:17:00,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:17:00,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:17:00,970 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:17:00,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2065926459] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:17:00,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654908963] [2022-11-25 22:17:00,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 22:17:00,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:00,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:17:00,972 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:17:00,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-25 22:17:01,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 22:17:01,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:17:01,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 22:17:01,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:01,263 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 22:17:01,263 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 42 [2022-11-25 22:17:01,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:17:01,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:17:02,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:17:02,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654908963] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:17:02,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 22:17:02,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 5] total 19 [2022-11-25 22:17:02,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549297121] [2022-11-25 22:17:02,009 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 22:17:02,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 22:17:02,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 22:17:02,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 22:17:02,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-11-25 22:17:02,010 INFO L87 Difference]: Start difference. First operand 420 states and 1596 transitions. Second operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:03,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:03,450 INFO L93 Difference]: Finished difference Result 674 states and 2194 transitions. [2022-11-25 22:17:03,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 22:17:03,451 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-25 22:17:03,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:03,455 INFO L225 Difference]: With dead ends: 674 [2022-11-25 22:17:03,455 INFO L226 Difference]: Without dead ends: 674 [2022-11-25 22:17:03,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2022-11-25 22:17:03,456 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 414 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:03,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 0 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-25 22:17:03,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-11-25 22:17:03,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 368. [2022-11-25 22:17:03,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 364 states have (on average 3.7362637362637363) internal successors, (1360), 367 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:03,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1360 transitions. [2022-11-25 22:17:03,473 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1360 transitions. Word has length 11 [2022-11-25 22:17:03,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:03,473 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 1360 transitions. [2022-11-25 22:17:03,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:03,473 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1360 transitions. [2022-11-25 22:17:03,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 22:17:03,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:03,474 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:17:03,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 (26)] Forceful destruction successful, exit code 0 [2022-11-25 22:17:03,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-11-25 22:17:03,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2022-11-25 22:17:04,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-25 22:17:04,087 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 22:17:04,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:04,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1084019575, now seen corresponding path program 1 times [2022-11-25 22:17:04,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 22:17:04,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1055243060] [2022-11-25 22:17:04,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:04,088 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 [2022-11-25 22:17:04,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 22:17:04,089 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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) [2022-11-25 22:17:04,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:17:04,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:04,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 22:17:04,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:04,354 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 22:17:04,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-25 22:17:04,454 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:17:04,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:17:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:17:04,778 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 22:17:04,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1055243060] [2022-11-25 22:17:04,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1055243060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:17:04,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1191047035] [2022-11-25 22:17:04,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:04,779 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 22:17:04,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 22:17:04,780 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 22:17:04,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-25 22:17:05,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:05,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 22:17:05,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:05,156 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 22:17:05,156 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 42 [2022-11-25 22:17:05,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:17:05,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:17:05,313 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:17:05,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1191047035] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:17:05,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797553492] [2022-11-25 22:17:05,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:05,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:05,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:17:05,317 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:17:05,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-25 22:17:05,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:05,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 22:17:05,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:05,588 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 22:17:05,589 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 42 [2022-11-25 22:17:05,653 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:17:05,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:17:05,759 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:17:05,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797553492] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:17:05,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 22:17:05,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 8 [2022-11-25 22:17:05,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373656260] [2022-11-25 22:17:05,760 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 22:17:05,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 22:17:05,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 22:17:05,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 22:17:05,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-25 22:17:05,761 INFO L87 Difference]: Start difference. First operand 368 states and 1360 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:06,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:06,578 INFO L93 Difference]: Finished difference Result 738 states and 2586 transitions. [2022-11-25 22:17:06,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 22:17:06,579 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 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 [2022-11-25 22:17:06,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:06,583 INFO L225 Difference]: With dead ends: 738 [2022-11-25 22:17:06,583 INFO L226 Difference]: Without dead ends: 738 [2022-11-25 22:17:06,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-11-25 22:17:06,584 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 236 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:06,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 0 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 22:17:06,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2022-11-25 22:17:06,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 504. [2022-11-25 22:17:06,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 500 states have (on average 3.984) internal successors, (1992), 503 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:06,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1992 transitions. [2022-11-25 22:17:06,605 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1992 transitions. Word has length 11 [2022-11-25 22:17:06,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:06,606 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 1992 transitions. [2022-11-25 22:17:06,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:06,607 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1992 transitions. [2022-11-25 22:17:06,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 22:17:06,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:06,611 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:17:06,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-25 22:17:06,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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)] Ended with exit code 0 [2022-11-25 22:17:07,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-11-25 22:17:07,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:07,215 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 22:17:07,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:07,215 INFO L85 PathProgramCache]: Analyzing trace with hash 755812836, now seen corresponding path program 1 times [2022-11-25 22:17:07,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 22:17:07,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1264433061] [2022-11-25 22:17:07,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:07,215 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 [2022-11-25 22:17:07,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 22:17:07,216 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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) [2022-11-25 22:17:07,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 (32)] Waiting until timeout for monitored process [2022-11-25 22:17:07,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:07,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 22:17:07,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:07,494 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 22:17:07,494 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 42 [2022-11-25 22:17:07,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:17:07,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:17:07,578 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 22:17:07,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1264433061] [2022-11-25 22:17:07,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1264433061] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:07,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:17:07,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:17:07,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609491529] [2022-11-25 22:17:07,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:07,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 22:17:07,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 22:17:07,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 22:17:07,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:17:07,580 INFO L87 Difference]: Start difference. First operand 504 states and 1992 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:07,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:07,824 INFO L93 Difference]: Finished difference Result 706 states and 2814 transitions. [2022-11-25 22:17:07,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 22:17:07,825 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-25 22:17:07,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:07,830 INFO L225 Difference]: With dead ends: 706 [2022-11-25 22:17:07,830 INFO L226 Difference]: Without dead ends: 706 [2022-11-25 22:17:07,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-25 22:17:07,831 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:07,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 22:17:07,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-11-25 22:17:07,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 604. [2022-11-25 22:17:07,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 600 states have (on average 4.17) internal successors, (2502), 603 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:07,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 2502 transitions. [2022-11-25 22:17:07,853 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 2502 transitions. Word has length 12 [2022-11-25 22:17:07,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:07,854 INFO L495 AbstractCegarLoop]: Abstraction has 604 states and 2502 transitions. [2022-11-25 22:17:07,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:07,854 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 2502 transitions. [2022-11-25 22:17:07,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 22:17:07,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:07,855 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:17:07,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 (32)] Forceful destruction successful, exit code 0 [2022-11-25 22:17:08,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:17:08,067 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 22:17:08,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:08,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1934347625, now seen corresponding path program 2 times [2022-11-25 22:17:08,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 22:17:08,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [160836596] [2022-11-25 22:17:08,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 22:17:08,068 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 [2022-11-25 22:17:08,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 22:17:08,069 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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) [2022-11-25 22:17:08,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:17:08,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 22:17:08,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:17:08,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 22:17:08,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:08,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:17:08,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:17:08,391 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:17:08,391 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 22:17:08,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [160836596] [2022-11-25 22:17:08,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [160836596] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:17:08,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2138752294] [2022-11-25 22:17:08,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 22:17:08,391 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 22:17:08,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 22:17:08,396 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 22:17:08,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-25 22:17:08,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 22:17:08,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:17:08,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 22:17:08,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:08,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:17:08,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:17:08,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:17:08,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2138752294] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:17:08,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581904450] [2022-11-25 22:17:08,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 22:17:08,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:08,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:17:08,822 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:17:08,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-25 22:17:09,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 22:17:09,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:17:09,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 22:17:09,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:09,123 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 22:17:09,123 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 42 [2022-11-25 22:17:09,308 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:17:09,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:17:09,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:17:09,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581904450] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:17:09,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 22:17:09,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 5] total 19 [2022-11-25 22:17:09,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886538211] [2022-11-25 22:17:09,860 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 22:17:09,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 22:17:09,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 22:17:09,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 22:17:09,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-11-25 22:17:09,862 INFO L87 Difference]: Start difference. First operand 604 states and 2502 transitions. Second operand has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 20 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) [2022-11-25 22:17:11,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:11,281 INFO L93 Difference]: Finished difference Result 804 states and 2874 transitions. [2022-11-25 22:17:11,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 22:17:11,281 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 20 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 13 [2022-11-25 22:17:11,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:11,285 INFO L225 Difference]: With dead ends: 804 [2022-11-25 22:17:11,286 INFO L226 Difference]: Without dead ends: 804 [2022-11-25 22:17:11,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2022-11-25 22:17:11,287 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 227 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:11,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 0 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-25 22:17:11,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-11-25 22:17:11,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 522. [2022-11-25 22:17:11,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 520 states have (on average 4.05) internal successors, (2106), 521 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:11,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 2106 transitions. [2022-11-25 22:17:11,308 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 2106 transitions. Word has length 13 [2022-11-25 22:17:11,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:11,308 INFO L495 AbstractCegarLoop]: Abstraction has 522 states and 2106 transitions. [2022-11-25 22:17:11,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 20 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) [2022-11-25 22:17:11,308 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 2106 transitions. [2022-11-25 22:17:11,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 22:17:11,309 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:11,309 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:17:11,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-25 22:17:11,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:17:11,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-25 22:17:11,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:11,922 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 22:17:11,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:11,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1955364635, now seen corresponding path program 1 times [2022-11-25 22:17:11,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 22:17:11,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [568709155] [2022-11-25 22:17:11,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:11,923 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 [2022-11-25 22:17:11,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 22:17:11,924 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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) [2022-11-25 22:17:11,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:17:12,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:12,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 22:17:12,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:12,207 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 22:17:12,208 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 42 [2022-11-25 22:17:12,315 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:17:12,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:17:12,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:17:12,629 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 22:17:12,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [568709155] [2022-11-25 22:17:12,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [568709155] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:17:12,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [545111829] [2022-11-25 22:17:12,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:12,629 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 22:17:12,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 22:17:12,630 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 22:17:12,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-25 22:17:12,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:12,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 22:17:12,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:13,071 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 22:17:13,071 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 42 [2022-11-25 22:17:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:17:13,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:17:13,269 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:17:13,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [545111829] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:17:13,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381556729] [2022-11-25 22:17:13,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:13,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:13,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:17:13,272 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:17:13,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-25 22:17:13,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:13,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 22:17:13,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:13,580 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 22:17:13,581 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 42 [2022-11-25 22:17:13,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:17:13,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:17:13,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:17:13,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381556729] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:17:13,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 22:17:13,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 8 [2022-11-25 22:17:13,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094661619] [2022-11-25 22:17:13,758 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 22:17:13,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 22:17:13,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 22:17:13,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 22:17:13,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-25 22:17:13,759 INFO L87 Difference]: Start difference. First operand 522 states and 2106 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:14,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:14,429 INFO L93 Difference]: Finished difference Result 958 states and 3746 transitions. [2022-11-25 22:17:14,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 22:17:14,430 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-25 22:17:14,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:14,435 INFO L225 Difference]: With dead ends: 958 [2022-11-25 22:17:14,436 INFO L226 Difference]: Without dead ends: 958 [2022-11-25 22:17:14,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-11-25 22:17:14,437 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 181 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:14,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 0 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 22:17:14,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-11-25 22:17:14,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 694. [2022-11-25 22:17:14,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 692 states have (on average 4.286127167630058) internal successors, (2966), 693 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:14,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 2966 transitions. [2022-11-25 22:17:14,483 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 2966 transitions. Word has length 13 [2022-11-25 22:17:14,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:14,484 INFO L495 AbstractCegarLoop]: Abstraction has 694 states and 2966 transitions. [2022-11-25 22:17:14,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:14,485 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 2966 transitions. [2022-11-25 22:17:14,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 22:17:14,486 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:14,486 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:17:14,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-25 22:17:14,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:17:14,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-11-25 22:17:15,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:15,091 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 22:17:15,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:15,091 INFO L85 PathProgramCache]: Analyzing trace with hash -2090159045, now seen corresponding path program 2 times [2022-11-25 22:17:15,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 22:17:15,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [134151711] [2022-11-25 22:17:15,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 22:17:15,092 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 [2022-11-25 22:17:15,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 22:17:15,093 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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) [2022-11-25 22:17:15,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:17:15,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 22:17:15,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:17:15,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 22:17:15,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:15,327 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:17:15,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:17:15,388 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:17:15,388 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 22:17:15,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [134151711] [2022-11-25 22:17:15,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [134151711] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:17:15,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2136295892] [2022-11-25 22:17:15,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 22:17:15,389 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 22:17:15,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 22:17:15,390 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 22:17:15,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-25 22:17:15,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 22:17:15,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:17:15,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 22:17:15,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:15,815 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:17:15,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:17:15,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:17:15,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2136295892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:17:15,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080657248] [2022-11-25 22:17:15,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 22:17:15,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:17:15,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:17:15,840 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:17:15,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-25 22:17:16,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 22:17:16,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 22:17:16,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 22:17:16,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:16,178 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 22:17:16,179 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 42 [2022-11-25 22:17:16,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:17:16,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:17:16,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:17:16,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080657248] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:17:16,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 22:17:16,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 5] total 19 [2022-11-25 22:17:16,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378800301] [2022-11-25 22:17:16,966 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 22:17:16,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 22:17:16,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 22:17:16,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 22:17:16,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-11-25 22:17:16,967 INFO L87 Difference]: Start difference. First operand 694 states and 2966 transitions. Second operand has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:18,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:18,283 INFO L93 Difference]: Finished difference Result 872 states and 3316 transitions. [2022-11-25 22:17:18,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 22:17:18,284 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-25 22:17:18,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:18,289 INFO L225 Difference]: With dead ends: 872 [2022-11-25 22:17:18,289 INFO L226 Difference]: Without dead ends: 872 [2022-11-25 22:17:18,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2022-11-25 22:17:18,290 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 322 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:18,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 0 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-25 22:17:18,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2022-11-25 22:17:18,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 608. [2022-11-25 22:17:18,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 4.177924217462932) internal successors, (2536), 607 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:18,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 2536 transitions. [2022-11-25 22:17:18,312 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 2536 transitions. Word has length 15 [2022-11-25 22:17:18,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:18,313 INFO L495 AbstractCegarLoop]: Abstraction has 608 states and 2536 transitions. [2022-11-25 22:17:18,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.894736842105263) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:18,313 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 2536 transitions. [2022-11-25 22:17:18,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-25 22:17:18,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:18,316 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:17:18,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:17:18,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-11-25 22:17:18,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2022-11-25 22:17:18,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-25 22:17:18,929 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 22:17:18,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:18,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1417120402, now seen corresponding path program 1 times [2022-11-25 22:17:18,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 22:17:18,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [452653686] [2022-11-25 22:17:18,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:18,930 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 22:17:18,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 22:17:18,931 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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) [2022-11-25 22:17:18,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 (42)] Waiting until timeout for monitored process [2022-11-25 22:17:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:19,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 22:17:19,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:19,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:17:19,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:17:19,335 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 22:17:19,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [452653686] [2022-11-25 22:17:19,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [452653686] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:19,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:17:19,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:17:19,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379360429] [2022-11-25 22:17:19,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:19,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:17:19,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 22:17:19,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:17:19,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:17:19,338 INFO L87 Difference]: Start difference. First operand 608 states and 2536 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:19,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:19,704 INFO L93 Difference]: Finished difference Result 779 states and 3087 transitions. [2022-11-25 22:17:19,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:17:19,705 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 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 23 [2022-11-25 22:17:19,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:19,708 INFO L225 Difference]: With dead ends: 779 [2022-11-25 22:17:19,708 INFO L226 Difference]: Without dead ends: 608 [2022-11-25 22:17:19,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:17:19,709 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 18 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:19,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 0 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 22:17:19,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-11-25 22:17:19,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 608. [2022-11-25 22:17:19,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 4.036243822075782) internal successors, (2450), 607 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:19,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 2450 transitions. [2022-11-25 22:17:19,748 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 2450 transitions. Word has length 23 [2022-11-25 22:17:19,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:19,749 INFO L495 AbstractCegarLoop]: Abstraction has 608 states and 2450 transitions. [2022-11-25 22:17:19,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:19,749 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 2450 transitions. [2022-11-25 22:17:19,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-25 22:17:19,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:19,751 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:17:19,762 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 (42)] Ended with exit code 0 [2022-11-25 22:17:19,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:17:19,952 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 22:17:19,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:19,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1017986214, now seen corresponding path program 1 times [2022-11-25 22:17:19,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 22:17:19,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1233743375] [2022-11-25 22:17:19,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:19,953 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 [2022-11-25 22:17:19,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 22:17:19,954 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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) [2022-11-25 22:17:19,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:17:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:20,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 22:17:20,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:20,271 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:17:20,272 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 22:17:20,272 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 22:17:20,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1233743375] [2022-11-25 22:17:20,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1233743375] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 22:17:20,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 22:17:20,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 22:17:20,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298427401] [2022-11-25 22:17:20,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 22:17:20,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 22:17:20,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 22:17:20,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 22:17:20,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 22:17:20,274 INFO L87 Difference]: Start difference. First operand 608 states and 2450 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:20,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 22:17:20,691 INFO L93 Difference]: Finished difference Result 717 states and 2749 transitions. [2022-11-25 22:17:20,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 22:17:20,692 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-25 22:17:20,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 22:17:20,695 INFO L225 Difference]: With dead ends: 717 [2022-11-25 22:17:20,695 INFO L226 Difference]: Without dead ends: 608 [2022-11-25 22:17:20,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 22:17:20,696 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 22:17:20,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 0 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 22:17:20,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-11-25 22:17:20,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 608. [2022-11-25 22:17:20,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 3.8780889621087313) internal successors, (2354), 607 states have internal predecessors, (2354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:20,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 2354 transitions. [2022-11-25 22:17:20,733 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 2354 transitions. Word has length 24 [2022-11-25 22:17:20,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 22:17:20,734 INFO L495 AbstractCegarLoop]: Abstraction has 608 states and 2354 transitions. [2022-11-25 22:17:20,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:17:20,735 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 2354 transitions. [2022-11-25 22:17:20,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-25 22:17:20,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 22:17:20,737 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 22:17:20,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:17:20,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:17:20,950 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-25 22:17:20,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 22:17:20,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1900738281, now seen corresponding path program 1 times [2022-11-25 22:17:20,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 22:17:20,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1153690322] [2022-11-25 22:17:20,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:17:20,952 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 22:17:20,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 22:17:20,953 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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) [2022-11-25 22:17:20,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/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 [2022-11-25 22:17:21,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:17:21,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 22:17:21,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:17:21,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:17:21,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 255 treesize of output 203 [2022-11-25 22:17:22,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 500 treesize of output 228 [2022-11-25 22:17:30,609 WARN L233 SmtUtils]: Spent 7.84s on a formula simplification. DAG size of input: 60 DAG size of output: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:17:37,815 WARN L233 SmtUtils]: Spent 6.94s on a formula simplification. DAG size of input: 37 DAG size of output: 33 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:17:38,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:17:38,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:17:41,230 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-11-25 22:17:41,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 653 treesize of output 251 [2022-11-25 22:17:41,253 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:17:41,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 30 [2022-11-25 22:19:01,328 WARN L233 SmtUtils]: Spent 1.29m on a formula simplification. DAG size of input: 279 DAG size of output: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:19:01,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:19:01,527 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 22:19:01,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1153690322] [2022-11-25 22:19:01,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1153690322] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:19:01,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [913902321] [2022-11-25 22:19:01,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:19:01,527 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 22:19:01,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 22:19:01,537 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 22:19:01,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-11-25 22:19:02,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:19:02,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-25 22:19:02,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:19:02,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:02,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 255 treesize of output 203 [2022-11-25 22:19:03,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:19:03,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:03,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:03,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:03,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:19:03,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:03,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:03,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:19:03,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:19:03,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 660 treesize of output 228 [2022-11-25 22:19:11,078 WARN L233 SmtUtils]: Spent 7.49s on a formula simplification. DAG size of input: 58 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:19:11,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:19:11,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:19:13,482 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-11-25 22:19:13,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 461 treesize of output 199 [2022-11-25 22:19:13,503 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:19:13,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 30 [2022-11-25 22:19:15,392 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:19:15,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [913902321] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:19:15,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191791661] [2022-11-25 22:19:15,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 22:19:15,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 22:19:15,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 22:19:15,395 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 22:19:15,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7b3b682-e1e1-4138-bdf9-bf4f4ec0a895/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-25 22:19:16,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 22:19:16,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-25 22:19:16,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 22:19:16,638 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 34 treesize of output 32 [2022-11-25 22:19:17,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 353 treesize of output 301 [2022-11-25 22:19:18,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:18,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:18,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:18,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:19:18,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:19:18,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:18,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:18,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 22:19:18,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:19:18,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-25 22:19:18,451 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:19:18,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 669 treesize of output 265 [2022-11-25 22:19:27,139 WARN L233 SmtUtils]: Spent 8.34s on a formula simplification. DAG size of input: 64 DAG size of output: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:19:32,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:19:32,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 22:19:35,868 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-11-25 22:19:35,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 653 treesize of output 251 [2022-11-25 22:19:35,893 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 22:19:35,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 30 [2022-11-25 22:20:48,354 WARN L233 SmtUtils]: Spent 1.12m on a formula simplification. DAG size of input: 249 DAG size of output: 77 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:20:48,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 22:20:48,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191791661] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 22:20:48,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 22:20:48,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 11, 11] total 41 [2022-11-25 22:20:48,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528089441] [2022-11-25 22:20:48,378 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 22:20:48,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-25 22:20:48,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 22:20:48,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-25 22:20:48,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1609, Unknown=5, NotChecked=0, Total=1806 [2022-11-25 22:20:48,380 INFO L87 Difference]: Start difference. First operand 608 states and 2354 transitions. Second operand has 43 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 42 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 22:21:54,585 WARN L233 SmtUtils]: Spent 1.02m on a formula simplification. DAG size of input: 153 DAG size of output: 115 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:22:24,248 WARN L233 SmtUtils]: Spent 28.58s on a formula simplification. DAG size of input: 125 DAG size of output: 99 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:22:55,542 WARN L233 SmtUtils]: Spent 28.41s on a formula simplification. DAG size of input: 88 DAG size of output: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:24:33,244 WARN L233 SmtUtils]: Spent 1.48m on a formula simplification. DAG size of input: 191 DAG size of output: 136 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:25:10,287 WARN L233 SmtUtils]: Spent 29.28s on a formula simplification. DAG size of input: 169 DAG size of output: 144 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:27:09,060 WARN L233 SmtUtils]: Spent 1.85m on a formula simplification. DAG size of input: 235 DAG size of output: 160 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:27:46,226 WARN L233 SmtUtils]: Spent 29.38s on a formula simplification. DAG size of input: 173 DAG size of output: 148 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:27:48,796 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] [2022-11-25 22:29:29,061 WARN L233 SmtUtils]: Spent 1.59m on a formula simplification. DAG size of input: 228 DAG size of output: 153 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:29:59,021 WARN L233 SmtUtils]: Spent 28.80s on a formula simplification. DAG size of input: 115 DAG size of output: 100 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 22:30:43,141 WARN L233 SmtUtils]: Spent 28.95s on a formula simplification. DAG size of input: 146 DAG size of output: 120 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)