./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 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/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_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9 --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-6b4ec56 [2022-11-20 19:43:25,320 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 19:43:25,322 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 19:43:25,342 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 19:43:25,342 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 19:43:25,343 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 19:43:25,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 19:43:25,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 19:43:25,347 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 19:43:25,348 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 19:43:25,349 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 19:43:25,350 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 19:43:25,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 19:43:25,352 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 19:43:25,353 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 19:43:25,354 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 19:43:25,355 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 19:43:25,356 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 19:43:25,357 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 19:43:25,359 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 19:43:25,362 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 19:43:25,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 19:43:25,367 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 19:43:25,368 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 19:43:25,376 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 19:43:25,376 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 19:43:25,377 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 19:43:25,379 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 19:43:25,380 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 19:43:25,380 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 19:43:25,381 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 19:43:25,382 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 19:43:25,382 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 19:43:25,383 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 19:43:25,384 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 19:43:25,384 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 19:43:25,385 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 19:43:25,385 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 19:43:25,385 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 19:43:25,386 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 19:43:25,387 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 19:43:25,395 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-20 19:43:25,435 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 19:43:25,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 19:43:25,437 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 19:43:25,437 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 19:43:25,437 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 19:43:25,438 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 19:43:25,438 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 19:43:25,438 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 19:43:25,438 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 19:43:25,438 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 19:43:25,439 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 19:43:25,440 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 19:43:25,440 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 19:43:25,440 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 19:43:25,440 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 19:43:25,440 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 19:43:25,440 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 19:43:25,441 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 19:43:25,441 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 19:43:25,441 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 19:43:25,442 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 19:43:25,442 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 19:43:25,442 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 19:43:25,442 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 19:43:25,443 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 19:43:25,443 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 19:43:25,443 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 19:43:25,443 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 19:43:25,443 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 19:43:25,444 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 19:43:25,444 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 19:43:25,444 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 19:43:25,444 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 19:43:25,444 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 19:43:25,445 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 19:43:25,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:43:25,446 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 19:43:25,446 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 19:43:25,446 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 19:43:25,446 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 19:43:25,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 19:43:25,446 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 19:43:25,447 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_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d [2022-11-20 19:43:25,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 19:43:25,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 19:43:25,726 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 19:43:25,728 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 19:43:25,728 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 19:43:25,729 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2022-11-20 19:43:28,839 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 19:43:29,035 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 19:43:29,036 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2022-11-20 19:43:29,043 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/data/ff890cc22/8dd1c61f3c55445382606b6cb81ee2bb/FLAGe201c1f46 [2022-11-20 19:43:29,057 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/data/ff890cc22/8dd1c61f3c55445382606b6cb81ee2bb [2022-11-20 19:43:29,059 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 19:43:29,061 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 19:43:29,062 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 19:43:29,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 19:43:29,066 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 19:43:29,066 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:43:29" (1/1) ... [2022-11-20 19:43:29,067 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35b52e39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:29, skipping insertion in model container [2022-11-20 19:43:29,068 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:43:29" (1/1) ... [2022-11-20 19:43:29,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 19:43:29,096 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 19:43:29,280 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_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4788,4801] [2022-11-20 19:43:29,294 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:43:29,305 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) [2022-11-20 19:43:29,306 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@53ef7906 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:29, skipping insertion in model container [2022-11-20 19:43:29,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 19:43:29,306 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-20 19:43:29,308 INFO L158 Benchmark]: Toolchain (without parser) took 246.33ms. Allocated memory is still 174.1MB. Free memory was 127.3MB in the beginning and 116.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 19:43:29,308 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 113.2MB. Free memory is still 62.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 19:43:29,309 INFO L158 Benchmark]: CACSL2BoogieTranslator took 244.08ms. Allocated memory is still 174.1MB. Free memory was 127.3MB in the beginning and 116.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 19:43:29,310 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 113.2MB. Free memory is still 62.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 244.08ms. Allocated memory is still 174.1MB. Free memory was 127.3MB in the beginning and 116.9MB in the end (delta: 10.5MB). 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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/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_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9 --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-6b4ec56 [2022-11-20 19:43:31,571 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 19:43:31,573 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 19:43:31,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 19:43:31,613 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 19:43:31,617 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 19:43:31,620 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 19:43:31,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 19:43:31,625 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 19:43:31,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 19:43:31,632 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 19:43:31,635 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 19:43:31,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 19:43:31,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 19:43:31,639 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 19:43:31,645 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 19:43:31,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 19:43:31,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 19:43:31,649 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 19:43:31,650 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 19:43:31,651 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 19:43:31,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 19:43:31,656 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 19:43:31,657 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 19:43:31,670 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 19:43:31,671 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 19:43:31,671 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 19:43:31,673 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 19:43:31,673 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 19:43:31,674 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 19:43:31,675 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 19:43:31,676 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 19:43:31,677 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 19:43:31,678 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 19:43:31,691 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 19:43:31,691 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 19:43:31,692 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 19:43:31,692 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 19:43:31,692 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 19:43:31,693 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 19:43:31,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 19:43:31,699 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-20 19:43:31,741 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 19:43:31,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 19:43:31,742 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 19:43:31,743 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 19:43:31,743 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 19:43:31,744 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 19:43:31,744 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 19:43:31,744 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 19:43:31,745 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 19:43:31,745 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 19:43:31,746 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 19:43:31,746 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 19:43:31,747 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 19:43:31,747 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 19:43:31,747 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 19:43:31,748 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 19:43:31,748 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 19:43:31,748 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 19:43:31,748 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 19:43:31,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 19:43:31,749 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 19:43:31,749 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 19:43:31,749 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 19:43:31,749 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 19:43:31,750 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 19:43:31,750 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-20 19:43:31,750 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-20 19:43:31,750 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 19:43:31,751 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 19:43:31,751 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 19:43:31,751 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 19:43:31,752 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 19:43:31,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:43:31,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 19:43:31,752 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 19:43:31,753 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-20 19:43:31,753 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-20 19:43:31,753 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 19:43:31,754 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-20 19:43:31,754 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_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a18ee378e36a8b6ec16846ba26aa7ebab799f55311c04bb5b266d3aa0d0986d [2022-11-20 19:43:32,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 19:43:32,152 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 19:43:32,158 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 19:43:32,159 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 19:43:32,160 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 19:43:32,161 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2022-11-20 19:43:35,178 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 19:43:35,406 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 19:43:35,407 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c [2022-11-20 19:43:35,415 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/data/8c356993b/6469c72f76314b8e86c731b94a11e74d/FLAG1faa82dc4 [2022-11-20 19:43:35,437 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/data/8c356993b/6469c72f76314b8e86c731b94a11e74d [2022-11-20 19:43:35,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 19:43:35,441 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 19:43:35,442 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 19:43:35,442 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 19:43:35,449 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 19:43:35,450 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:43:35" (1/1) ... [2022-11-20 19:43:35,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71e1e490 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:35, skipping insertion in model container [2022-11-20 19:43:35,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:43:35" (1/1) ... [2022-11-20 19:43:35,460 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 19:43:35,497 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 19:43:35,755 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_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4788,4801] [2022-11-20 19:43:35,782 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:43:35,799 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-20 19:43:35,808 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 19:43:35,845 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_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4788,4801] [2022-11-20 19:43:35,849 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:43:35,860 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 19:43:35,894 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_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/sv-benchmarks/c/weaver/chl-name-comparator-trans.wvr.c[4788,4801] [2022-11-20 19:43:35,905 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:43:35,933 INFO L208 MainTranslator]: Completed translation [2022-11-20 19:43:35,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:35 WrapperNode [2022-11-20 19:43:35,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 19:43:35,935 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 19:43:35,935 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 19:43:35,935 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 19:43:35,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:35" (1/1) ... [2022-11-20 19:43:35,969 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:35" (1/1) ... [2022-11-20 19:43:36,018 INFO L138 Inliner]: procedures = 28, calls = 44, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 278 [2022-11-20 19:43:36,019 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 19:43:36,020 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 19:43:36,020 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 19:43:36,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 19:43:36,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:35" (1/1) ... [2022-11-20 19:43:36,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:35" (1/1) ... [2022-11-20 19:43:36,034 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:35" (1/1) ... [2022-11-20 19:43:36,035 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:35" (1/1) ... [2022-11-20 19:43:36,045 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:35" (1/1) ... [2022-11-20 19:43:36,050 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:35" (1/1) ... [2022-11-20 19:43:36,052 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:35" (1/1) ... [2022-11-20 19:43:36,054 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:35" (1/1) ... [2022-11-20 19:43:36,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 19:43:36,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 19:43:36,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 19:43:36,059 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 19:43:36,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:35" (1/1) ... [2022-11-20 19:43:36,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:43:36,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:43:36,093 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 19:43:36,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 19:43:36,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 19:43:36,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-20 19:43:36,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 19:43:36,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-20 19:43:36,133 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-20 19:43:36,134 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-20 19:43:36,134 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-20 19:43:36,134 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-20 19:43:36,134 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-20 19:43:36,134 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-20 19:43:36,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 19:43:36,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 19:43:36,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 19:43:36,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 19:43:36,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-20 19:43:36,137 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 19:43:36,259 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 19:43:36,261 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 19:43:36,980 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 19:43:36,990 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 19:43:36,990 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-20 19:43:36,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:43:36 BoogieIcfgContainer [2022-11-20 19:43:36,992 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 19:43:36,994 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 19:43:36,995 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 19:43:36,997 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 19:43:36,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:43:35" (1/3) ... [2022-11-20 19:43:36,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60c46b9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:43:36, skipping insertion in model container [2022-11-20 19:43:36,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:43:35" (2/3) ... [2022-11-20 19:43:36,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60c46b9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:43:36, skipping insertion in model container [2022-11-20 19:43:36,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:43:36" (3/3) ... [2022-11-20 19:43:37,000 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-trans.wvr.c [2022-11-20 19:43:37,018 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 19:43:37,018 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2022-11-20 19:43:37,018 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 19:43:37,149 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 19:43:37,226 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 19:43:37,245 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 364 places, 380 transitions, 784 flow [2022-11-20 19:43:37,250 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 364 places, 380 transitions, 784 flow [2022-11-20 19:43:37,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 364 places, 380 transitions, 784 flow [2022-11-20 19:43:37,479 INFO L130 PetriNetUnfolder]: 26/377 cut-off events. [2022-11-20 19:43:37,479 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-20 19:43:37,494 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. [2022-11-20 19:43:37,512 INFO L119 LiptonReduction]: Number of co-enabled transitions 37914 [2022-11-20 19:44:14,467 WARN L233 SmtUtils]: Spent 6.85s 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) [2022-11-20 19:44:21,047 WARN L233 SmtUtils]: Spent 5.82s 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) [2022-11-20 19:44:22,348 INFO L134 LiptonReduction]: Checked pairs total: 34726 [2022-11-20 19:44:22,348 INFO L136 LiptonReduction]: Total number of compositions: 442 [2022-11-20 19:44:22,356 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 55 places, 49 transitions, 122 flow [2022-11-20 19:44:22,432 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) [2022-11-20 19:44:22,450 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 19:44:22,454 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;@679b82a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 19:44:22,455 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2022-11-20 19:44:22,459 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) [2022-11-20 19:44:22,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 19:44:22,464 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:22,464 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 19:44:22,465 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 19:44:22,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:22,470 INFO L85 PathProgramCache]: Analyzing trace with hash 49895, now seen corresponding path program 1 times [2022-11-20 19:44:22,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:22,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [736576004] [2022-11-20 19:44:22,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:22,483 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:22,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:22,491 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 19:44:22,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 19:44:22,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:22,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 19:44:22,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:22,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:22,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:44:22,739 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:22,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [736576004] [2022-11-20 19:44:22,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [736576004] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:44:22,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:44:22,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 19:44:22,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131079679] [2022-11-20 19:44:22,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:44:22,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:44:22,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:22,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:44:22,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:44:22,794 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) [2022-11-20 19:44:23,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:23,119 INFO L93 Difference]: Finished difference Result 752 states and 2568 transitions. [2022-11-20 19:44:23,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:44:23,122 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 [2022-11-20 19:44:23,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:23,184 INFO L225 Difference]: With dead ends: 752 [2022-11-20 19:44:23,184 INFO L226 Difference]: Without dead ends: 752 [2022-11-20 19:44:23,185 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 [2022-11-20 19:44:23,189 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-11-20 19:44:23,190 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] [2022-11-20 19:44:23,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-11-20 19:44:23,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 750. [2022-11-20 19:44:23,355 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) [2022-11-20 19:44:23,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2568 transitions. [2022-11-20 19:44:23,367 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2568 transitions. Word has length 2 [2022-11-20 19:44:23,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:23,367 INFO L495 AbstractCegarLoop]: Abstraction has 750 states and 2568 transitions. [2022-11-20 19:44:23,367 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) [2022-11-20 19:44:23,368 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2568 transitions. [2022-11-20 19:44:23,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 19:44:23,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:23,369 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 19:44:23,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-20 19:44:23,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:23,583 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 19:44:23,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:23,584 INFO L85 PathProgramCache]: Analyzing trace with hash 49672, now seen corresponding path program 1 times [2022-11-20 19:44:23,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:23,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2004890349] [2022-11-20 19:44:23,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:23,585 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 [2022-11-20 19:44:23,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:23,587 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 19:44:23,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 19:44:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:23,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 19:44:23,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:23,816 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 19:44:23,817 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 [2022-11-20 19:44:23,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:23,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:44:23,851 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:23,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2004890349] [2022-11-20 19:44:23,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2004890349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:44:23,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:44:23,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 19:44:23,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982724861] [2022-11-20 19:44:23,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:44:23,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:44:23,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:23,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:44:23,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:44:23,855 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) [2022-11-20 19:44:24,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:24,060 INFO L93 Difference]: Finished difference Result 749 states and 2566 transitions. [2022-11-20 19:44:24,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:44:24,060 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 [2022-11-20 19:44:24,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:24,067 INFO L225 Difference]: With dead ends: 749 [2022-11-20 19:44:24,067 INFO L226 Difference]: Without dead ends: 749 [2022-11-20 19:44:24,067 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 [2022-11-20 19:44:24,068 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 [2022-11-20 19:44:24,069 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] [2022-11-20 19:44:24,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-11-20 19:44:24,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2022-11-20 19:44:24,092 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) [2022-11-20 19:44:24,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2566 transitions. [2022-11-20 19:44:24,097 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2566 transitions. Word has length 2 [2022-11-20 19:44:24,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:24,098 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 2566 transitions. [2022-11-20 19:44:24,098 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) [2022-11-20 19:44:24,098 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2566 transitions. [2022-11-20 19:44:24,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 19:44:24,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:24,099 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 19:44:24,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 19:44:24,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:24,311 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 19:44:24,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:24,311 INFO L85 PathProgramCache]: Analyzing trace with hash 49673, now seen corresponding path program 1 times [2022-11-20 19:44:24,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:24,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [950700537] [2022-11-20 19:44:24,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:24,312 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 [2022-11-20 19:44:24,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:24,313 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 19:44:24,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 19:44:24,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:24,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 19:44:24,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:24,607 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 19:44:24,607 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 [2022-11-20 19:44:24,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:24,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:44:24,635 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:24,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [950700537] [2022-11-20 19:44:24,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [950700537] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:44:24,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:44:24,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 19:44:24,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278748410] [2022-11-20 19:44:24,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:44:24,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:44:24,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:24,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:44:24,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:44:24,637 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) [2022-11-20 19:44:24,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:24,887 INFO L93 Difference]: Finished difference Result 749 states and 2565 transitions. [2022-11-20 19:44:24,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:44:24,888 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 [2022-11-20 19:44:24,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:24,894 INFO L225 Difference]: With dead ends: 749 [2022-11-20 19:44:24,894 INFO L226 Difference]: Without dead ends: 749 [2022-11-20 19:44:24,895 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 [2022-11-20 19:44:24,896 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:24,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:44:24,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-11-20 19:44:24,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2022-11-20 19:44:24,919 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) [2022-11-20 19:44:24,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2565 transitions. [2022-11-20 19:44:24,924 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2565 transitions. Word has length 2 [2022-11-20 19:44:24,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:24,925 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 2565 transitions. [2022-11-20 19:44:24,925 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) [2022-11-20 19:44:24,925 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2565 transitions. [2022-11-20 19:44:24,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 19:44:24,926 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:24,926 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 19:44:24,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 19:44:25,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:25,132 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 19:44:25,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:25,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1546327, now seen corresponding path program 1 times [2022-11-20 19:44:25,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:25,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [618501654] [2022-11-20 19:44:25,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:25,133 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 [2022-11-20 19:44:25,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:25,134 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 19:44:25,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 19:44:25,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:25,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 19:44:25,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:25,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:25,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:25,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:25,351 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:25,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [618501654] [2022-11-20 19:44:25,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [618501654] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:25,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [307128526] [2022-11-20 19:44:25,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:25,352 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:44:25,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:44:25,356 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:44:25,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-11-20 19:44:25,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:25,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 19:44:25,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:25,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:25,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:25,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [307128526] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:25,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242794213] [2022-11-20 19:44:25,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:25,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:44:25,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:44:25,545 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:44:25,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 19:44:25,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:25,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 19:44:25,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:25,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:25,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:25,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:25,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242794213] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:25,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:44:25,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 4 [2022-11-20 19:44:25,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467070152] [2022-11-20 19:44:25,692 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:44:25,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 19:44:25,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:25,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 19:44:25,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 19:44:25,693 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) [2022-11-20 19:44:26,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:26,111 INFO L93 Difference]: Finished difference Result 752 states and 2569 transitions. [2022-11-20 19:44:26,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:44:26,112 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 [2022-11-20 19:44:26,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:26,117 INFO L225 Difference]: With dead ends: 752 [2022-11-20 19:44:26,117 INFO L226 Difference]: Without dead ends: 752 [2022-11-20 19:44:26,117 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 [2022-11-20 19:44:26,118 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:26,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 0 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 19:44:26,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-11-20 19:44:26,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 751. [2022-11-20 19:44:26,140 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) [2022-11-20 19:44:26,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2569 transitions. [2022-11-20 19:44:26,145 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2569 transitions. Word has length 3 [2022-11-20 19:44:26,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:26,145 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 2569 transitions. [2022-11-20 19:44:26,146 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) [2022-11-20 19:44:26,146 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2569 transitions. [2022-11-20 19:44:26,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 19:44:26,146 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:26,146 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 19:44:26,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 19:44:26,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:26,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:26,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:44:26,758 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 19:44:26,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:26,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1546105, now seen corresponding path program 1 times [2022-11-20 19:44:26,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:26,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1483387937] [2022-11-20 19:44:26,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:26,760 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 [2022-11-20 19:44:26,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:26,761 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 19:44:26,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 19:44:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:26,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 19:44:26,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:26,961 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 19:44:26,962 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 [2022-11-20 19:44:27,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:27,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:27,153 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:27,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1483387937] [2022-11-20 19:44:27,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1483387937] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:27,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1124350373] [2022-11-20 19:44:27,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:27,153 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:44:27,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:44:27,156 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:44:27,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-20 19:44:27,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:27,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 19:44:27,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:27,458 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 19:44:27,459 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 [2022-11-20 19:44:27,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:27,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:27,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:27,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1124350373] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:27,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099091262] [2022-11-20 19:44:27,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:27,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:44:27,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:44:27,527 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:44:27,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 19:44:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:27,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 19:44:27,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:27,749 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 19:44:27,750 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 [2022-11-20 19:44:27,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:27,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:27,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:27,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099091262] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:27,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:44:27,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 4 [2022-11-20 19:44:27,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768871022] [2022-11-20 19:44:27,812 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:44:27,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 19:44:27,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:27,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 19:44:27,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 19:44:27,813 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) [2022-11-20 19:44:28,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:28,441 INFO L93 Difference]: Finished difference Result 751 states and 2567 transitions. [2022-11-20 19:44:28,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:44:28,442 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 [2022-11-20 19:44:28,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:28,447 INFO L225 Difference]: With dead ends: 751 [2022-11-20 19:44:28,448 INFO L226 Difference]: Without dead ends: 751 [2022-11-20 19:44:28,448 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 [2022-11-20 19:44:28,448 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:28,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 19:44:28,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-11-20 19:44:28,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 751. [2022-11-20 19:44:28,484 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) [2022-11-20 19:44:28,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2567 transitions. [2022-11-20 19:44:28,488 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2567 transitions. Word has length 3 [2022-11-20 19:44:28,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:28,489 INFO L495 AbstractCegarLoop]: Abstraction has 751 states and 2567 transitions. [2022-11-20 19:44:28,489 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) [2022-11-20 19:44:28,489 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2567 transitions. [2022-11-20 19:44:28,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 19:44:28,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:28,490 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1] [2022-11-20 19:44:28,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:28,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:28,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:29,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 19:44:29,103 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 19:44:29,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:29,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1486006871, now seen corresponding path program 2 times [2022-11-20 19:44:29,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:29,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159390847] [2022-11-20 19:44:29,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 19:44:29,104 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:29,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:29,105 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 19:44:29,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 19:44:29,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-20 19:44:29,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:44:29,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 19:44:29,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:29,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:44:29,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:44:29,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:44:29,329 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-20 19:44:29,330 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 [2022-11-20 19:44:29,357 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-20 19:44:29,357 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 [2022-11-20 19:44:29,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:29,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:44:29,479 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:29,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1159390847] [2022-11-20 19:44:29,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1159390847] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:44:29,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:44:29,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 19:44:29,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836620755] [2022-11-20 19:44:29,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:44:29,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:44:29,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:29,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:44:29,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:44:29,481 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) [2022-11-20 19:44:29,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:29,655 INFO L93 Difference]: Finished difference Result 750 states and 2566 transitions. [2022-11-20 19:44:29,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:44:29,655 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 [2022-11-20 19:44:29,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:29,661 INFO L225 Difference]: With dead ends: 750 [2022-11-20 19:44:29,661 INFO L226 Difference]: Without dead ends: 750 [2022-11-20 19:44:29,662 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 [2022-11-20 19:44:29,662 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:29,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 41 Unchecked, 0.2s Time] [2022-11-20 19:44:29,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-11-20 19:44:29,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 750. [2022-11-20 19:44:29,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 619 states have (on average 4.145395799676899) 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) [2022-11-20 19:44:29,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2566 transitions. [2022-11-20 19:44:29,710 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2566 transitions. Word has length 5 [2022-11-20 19:44:29,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:29,712 INFO L495 AbstractCegarLoop]: Abstraction has 750 states and 2566 transitions. [2022-11-20 19:44:29,712 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) [2022-11-20 19:44:29,712 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2566 transitions. [2022-11-20 19:44:29,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 19:44:29,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:29,713 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1] [2022-11-20 19:44:29,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:29,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:29,924 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 19:44:29,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:29,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1486006873, now seen corresponding path program 1 times [2022-11-20 19:44:29,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:29,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [868612981] [2022-11-20 19:44:29,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:29,925 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 [2022-11-20 19:44:29,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:29,926 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 19:44:29,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 19:44:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:30,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 19:44:30,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:30,161 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2022-11-20 19:44:30,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 51 [2022-11-20 19:44:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:30,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:44:30,243 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:30,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [868612981] [2022-11-20 19:44:30,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [868612981] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:44:30,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:44:30,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 19:44:30,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880835469] [2022-11-20 19:44:30,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:44:30,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:44:30,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:30,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:44:30,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:44:30,245 INFO L87 Difference]: Start difference. First operand 750 states and 2566 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) [2022-11-20 19:44:30,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:30,432 INFO L93 Difference]: Finished difference Result 749 states and 2565 transitions. [2022-11-20 19:44:30,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:44:30,432 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 [2022-11-20 19:44:30,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:30,438 INFO L225 Difference]: With dead ends: 749 [2022-11-20 19:44:30,438 INFO L226 Difference]: Without dead ends: 749 [2022-11-20 19:44:30,438 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 [2022-11-20 19:44:30,440 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:30,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-11-20 19:44:30,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-11-20 19:44:30,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2022-11-20 19:44:30,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 619 states have (on average 4.143780290791599) 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) [2022-11-20 19:44:30,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2565 transitions. [2022-11-20 19:44:30,469 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2565 transitions. Word has length 5 [2022-11-20 19:44:30,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:30,469 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 2565 transitions. [2022-11-20 19:44:30,469 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) [2022-11-20 19:44:30,469 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2565 transitions. [2022-11-20 19:44:30,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 19:44:30,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:30,470 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1] [2022-11-20 19:44:30,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 19:44:30,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:30,682 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 19:44:30,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:30,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1486006649, now seen corresponding path program 2 times [2022-11-20 19:44:30,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:30,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1008333296] [2022-11-20 19:44:30,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 19:44:30,683 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 [2022-11-20 19:44:30,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:30,685 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 19:44:30,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 19:44:30,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 19:44:30,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:44:30,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 19:44:30,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:30,949 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-20 19:44:30,949 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 [2022-11-20 19:44:31,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:31,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:31,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:31,602 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:31,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1008333296] [2022-11-20 19:44:31,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1008333296] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:31,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2024725951] [2022-11-20 19:44:31,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 19:44:31,603 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:44:31,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:44:31,604 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:44:31,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-20 19:44:31,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 19:44:31,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:44:31,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 19:44:31,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:31,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:31,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:32,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:32,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2024725951] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:32,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179305242] [2022-11-20 19:44:32,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 19:44:32,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:44:32,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:44:32,231 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:44:32,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 19:44:32,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 19:44:32,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:44:32,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 19:44:32,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:32,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:32,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:32,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:44:32,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179305242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:32,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:44:32,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 16 [2022-11-20 19:44:32,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205656093] [2022-11-20 19:44:32,412 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:44:32,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 19:44:32,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:32,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 19:44:32,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2022-11-20 19:44:32,415 INFO L87 Difference]: Start difference. First operand 749 states and 2565 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) [2022-11-20 19:44:33,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:33,046 INFO L93 Difference]: Finished difference Result 748 states and 2563 transitions. [2022-11-20 19:44:33,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 19:44:33,047 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 [2022-11-20 19:44:33,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:33,053 INFO L225 Difference]: With dead ends: 748 [2022-11-20 19:44:33,053 INFO L226 Difference]: Without dead ends: 748 [2022-11-20 19:44:33,053 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 [2022-11-20 19:44:33,054 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 114 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:33,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 0 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 19:44:33,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-11-20 19:44:33,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 748. [2022-11-20 19:44:33,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 619 states have (on average 4.140549273021001) internal successors, (2563), 747 states have internal predecessors, (2563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:33,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 2563 transitions. [2022-11-20 19:44:33,084 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 2563 transitions. Word has length 5 [2022-11-20 19:44:33,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:33,084 INFO L495 AbstractCegarLoop]: Abstraction has 748 states and 2563 transitions. [2022-11-20 19:44:33,084 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) [2022-11-20 19:44:33,084 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 2563 transitions. [2022-11-20 19:44:33,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 19:44:33,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:33,085 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1] [2022-11-20 19:44:33,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:33,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 19:44:33,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:33,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:44:33,688 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 19:44:33,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:33,689 INFO L85 PathProgramCache]: Analyzing trace with hash 2123496743, now seen corresponding path program 1 times [2022-11-20 19:44:33,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:33,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [365560350] [2022-11-20 19:44:33,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:33,689 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 [2022-11-20 19:44:33,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:33,690 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 19:44:33,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 19:44:33,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:33,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 19:44:33,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:33,906 INFO L321 Elim1Store]: treesize reduction 101, result has 20.5 percent of original size [2022-11-20 19:44:33,906 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 [2022-11-20 19:44:33,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:33,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:44:33,944 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:33,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [365560350] [2022-11-20 19:44:33,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [365560350] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:44:33,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:44:33,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 19:44:33,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688238077] [2022-11-20 19:44:33,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:44:33,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:44:33,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:33,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:44:33,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:44:33,946 INFO L87 Difference]: Start difference. First operand 748 states and 2563 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) [2022-11-20 19:44:34,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:34,143 INFO L93 Difference]: Finished difference Result 718 states and 2478 transitions. [2022-11-20 19:44:34,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:44:34,144 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 [2022-11-20 19:44:34,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:34,149 INFO L225 Difference]: With dead ends: 718 [2022-11-20 19:44:34,149 INFO L226 Difference]: Without dead ends: 718 [2022-11-20 19:44:34,150 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 [2022-11-20 19:44:34,150 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:34,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 0 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:44:34,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-11-20 19:44:34,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 718. [2022-11-20 19:44:34,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 601 states have (on average 4.123128119800333) internal successors, (2478), 717 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:34,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 2478 transitions. [2022-11-20 19:44:34,176 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 2478 transitions. Word has length 7 [2022-11-20 19:44:34,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:34,176 INFO L495 AbstractCegarLoop]: Abstraction has 718 states and 2478 transitions. [2022-11-20 19:44:34,176 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) [2022-11-20 19:44:34,177 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 2478 transitions. [2022-11-20 19:44:34,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 19:44:34,177 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:34,177 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1] [2022-11-20 19:44:34,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-11-20 19:44:34,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:34,390 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 19:44:34,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:34,390 INFO L85 PathProgramCache]: Analyzing trace with hash 2123496744, now seen corresponding path program 1 times [2022-11-20 19:44:34,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:34,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1956360035] [2022-11-20 19:44:34,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:34,391 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 [2022-11-20 19:44:34,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:34,392 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 19:44:34,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 19:44:34,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:34,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 19:44:34,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:34,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:44:34,658 INFO L321 Elim1Store]: treesize reduction 59, result has 36.6 percent of original size [2022-11-20 19:44:34,659 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 [2022-11-20 19:44:34,671 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 [2022-11-20 19:44:34,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:34,805 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:44:34,805 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:34,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1956360035] [2022-11-20 19:44:34,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1956360035] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:44:34,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:44:34,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 19:44:34,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475769264] [2022-11-20 19:44:34,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:44:34,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:44:34,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:34,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:44:34,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:44:34,808 INFO L87 Difference]: Start difference. First operand 718 states and 2478 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) [2022-11-20 19:44:34,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:34,983 INFO L93 Difference]: Finished difference Result 717 states and 2476 transitions. [2022-11-20 19:44:34,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:44:34,984 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 [2022-11-20 19:44:34,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:34,988 INFO L225 Difference]: With dead ends: 717 [2022-11-20 19:44:34,989 INFO L226 Difference]: Without dead ends: 717 [2022-11-20 19:44:34,989 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 [2022-11-20 19:44:34,989 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:34,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2022-11-20 19:44:34,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-11-20 19:44:35,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 717. [2022-11-20 19:44:35,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 600 states have (on average 4.126666666666667) internal successors, (2476), 716 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:35,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 2476 transitions. [2022-11-20 19:44:35,013 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 2476 transitions. Word has length 7 [2022-11-20 19:44:35,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:35,013 INFO L495 AbstractCegarLoop]: Abstraction has 717 states and 2476 transitions. [2022-11-20 19:44:35,013 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) [2022-11-20 19:44:35,013 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 2476 transitions. [2022-11-20 19:44:35,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 19:44:35,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:35,014 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1] [2022-11-20 19:44:35,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 19:44:35,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:35,227 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 19:44:35,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:35,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1403888311, now seen corresponding path program 1 times [2022-11-20 19:44:35,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:35,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1612737521] [2022-11-20 19:44:35,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:35,228 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 [2022-11-20 19:44:35,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:35,229 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 19:44:35,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 19:44:35,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:35,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 19:44:35,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:35,437 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-20 19:44:35,437 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 [2022-11-20 19:44:35,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:35,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:44:35,469 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:35,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1612737521] [2022-11-20 19:44:35,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1612737521] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:44:35,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:44:35,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 19:44:35,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720395404] [2022-11-20 19:44:35,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:44:35,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:44:35,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:35,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:44:35,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:44:35,471 INFO L87 Difference]: Start difference. First operand 717 states and 2476 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) [2022-11-20 19:44:35,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:35,679 INFO L93 Difference]: Finished difference Result 403 states and 1358 transitions. [2022-11-20 19:44:35,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 19:44:35,680 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 [2022-11-20 19:44:35,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:35,684 INFO L225 Difference]: With dead ends: 403 [2022-11-20 19:44:35,685 INFO L226 Difference]: Without dead ends: 403 [2022-11-20 19:44:35,685 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 [2022-11-20 19:44:35,686 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 63 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:35,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 0 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:44:35,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-11-20 19:44:35,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 403. [2022-11-20 19:44:35,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 361 states have (on average 3.7617728531855956) internal successors, (1358), 402 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:35,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1358 transitions. [2022-11-20 19:44:35,723 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1358 transitions. Word has length 8 [2022-11-20 19:44:35,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:35,723 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 1358 transitions. [2022-11-20 19:44:35,723 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) [2022-11-20 19:44:35,723 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1358 transitions. [2022-11-20 19:44:35,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 19:44:35,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:35,724 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1] [2022-11-20 19:44:35,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 19:44:35,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:35,936 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 19:44:35,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:35,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1403888312, now seen corresponding path program 1 times [2022-11-20 19:44:35,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:35,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769568452] [2022-11-20 19:44:35,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:35,937 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:35,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:35,938 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 19:44:35,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 19:44:36,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:36,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 19:44:36,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:36,161 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 19:44:36,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-20 19:44:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:36,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:44:36,229 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:36,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769568452] [2022-11-20 19:44:36,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769568452] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:44:36,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:44:36,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:44:36,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556153240] [2022-11-20 19:44:36,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:44:36,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 19:44:36,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:36,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 19:44:36,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:44:36,231 INFO L87 Difference]: Start difference. First operand 403 states and 1358 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) [2022-11-20 19:44:36,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:36,619 INFO L93 Difference]: Finished difference Result 635 states and 2124 transitions. [2022-11-20 19:44:36,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:44:36,620 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 [2022-11-20 19:44:36,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:36,627 INFO L225 Difference]: With dead ends: 635 [2022-11-20 19:44:36,627 INFO L226 Difference]: Without dead ends: 635 [2022-11-20 19:44:36,627 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 [2022-11-20 19:44:36,628 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 105 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:36,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 0 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 19:44:36,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2022-11-20 19:44:36,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 486. [2022-11-20 19:44:36,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 444 states have (on average 3.9076576576576576) internal successors, (1735), 485 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:36,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1735 transitions. [2022-11-20 19:44:36,648 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1735 transitions. Word has length 8 [2022-11-20 19:44:36,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:36,649 INFO L495 AbstractCegarLoop]: Abstraction has 486 states and 1735 transitions. [2022-11-20 19:44:36,649 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) [2022-11-20 19:44:36,649 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1735 transitions. [2022-11-20 19:44:36,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 19:44:36,650 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:36,650 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1] [2022-11-20 19:44:36,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 19:44:36,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:36,862 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 19:44:36,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:36,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1403888223, now seen corresponding path program 1 times [2022-11-20 19:44:36,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:36,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459177376] [2022-11-20 19:44:36,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:36,864 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 [2022-11-20 19:44:36,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:36,865 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 19:44:36,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 19:44:37,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:37,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 19:44:37,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:37,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:44:37,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:44:37,148 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-11-20 19:44:37,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 36 [2022-11-20 19:44:37,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-20 19:44:37,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:37,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:44:37,292 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:37,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459177376] [2022-11-20 19:44:37,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459177376] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:44:37,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:44:37,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 19:44:37,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168703722] [2022-11-20 19:44:37,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:44:37,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:44:37,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:37,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:44:37,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:44:37,294 INFO L87 Difference]: Start difference. First operand 486 states and 1735 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2022-11-20 19:44:37,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:37,411 INFO L93 Difference]: Finished difference Result 485 states and 1732 transitions. [2022-11-20 19:44:37,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:44:37,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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 [2022-11-20 19:44:37,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:37,415 INFO L225 Difference]: With dead ends: 485 [2022-11-20 19:44:37,415 INFO L226 Difference]: Without dead ends: 485 [2022-11-20 19:44:37,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:44:37,416 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:37,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-20 19:44:37,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-11-20 19:44:37,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 485. [2022-11-20 19:44:37,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 443 states have (on average 3.909706546275395) internal successors, (1732), 484 states have internal predecessors, (1732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:37,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1732 transitions. [2022-11-20 19:44:37,432 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1732 transitions. Word has length 8 [2022-11-20 19:44:37,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:37,432 INFO L495 AbstractCegarLoop]: Abstraction has 485 states and 1732 transitions. [2022-11-20 19:44:37,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2022-11-20 19:44:37,433 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1732 transitions. [2022-11-20 19:44:37,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 19:44:37,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:37,433 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-20 19:44:37,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:37,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:37,651 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 19:44:37,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:37,651 INFO L85 PathProgramCache]: Analyzing trace with hash 570866252, now seen corresponding path program 1 times [2022-11-20 19:44:37,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:37,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1524649186] [2022-11-20 19:44:37,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:37,652 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 [2022-11-20 19:44:37,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:37,653 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 19:44:37,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-20 19:44:37,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:37,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 19:44:37,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:37,924 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 19:44:37,925 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 [2022-11-20 19:44:38,015 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:38,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:38,328 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:38,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1524649186] [2022-11-20 19:44:38,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1524649186] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:38,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [378470365] [2022-11-20 19:44:38,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:38,329 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:44:38,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:44:38,331 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:44:38,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-20 19:44:38,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:38,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 19:44:38,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:38,720 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 19:44:38,721 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 [2022-11-20 19:44:38,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:38,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:38,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:38,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [378470365] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:38,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305444218] [2022-11-20 19:44:38,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:38,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:44:38,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:44:38,853 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:44:38,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 19:44:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:39,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 19:44:39,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:39,115 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 19:44:39,115 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 [2022-11-20 19:44:39,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:39,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:39,263 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:39,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305444218] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:39,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:44:39,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 8 [2022-11-20 19:44:39,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094126939] [2022-11-20 19:44:39,263 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:44:39,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 19:44:39,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:39,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 19:44:39,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 19:44:39,264 INFO L87 Difference]: Start difference. First operand 485 states and 1732 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) [2022-11-20 19:44:40,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:40,407 INFO L93 Difference]: Finished difference Result 1098 states and 3653 transitions. [2022-11-20 19:44:40,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 19:44:40,408 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 [2022-11-20 19:44:40,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:40,416 INFO L225 Difference]: With dead ends: 1098 [2022-11-20 19:44:40,416 INFO L226 Difference]: Without dead ends: 1098 [2022-11-20 19:44:40,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-11-20 19:44:40,417 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 293 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:40,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 0 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-20 19:44:40,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2022-11-20 19:44:40,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 651. [2022-11-20 19:44:40,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 609 states have (on average 4.082101806239737) internal successors, (2486), 650 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:40,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 2486 transitions. [2022-11-20 19:44:40,463 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 2486 transitions. Word has length 9 [2022-11-20 19:44:40,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:40,464 INFO L495 AbstractCegarLoop]: Abstraction has 651 states and 2486 transitions. [2022-11-20 19:44:40,464 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) [2022-11-20 19:44:40,464 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 2486 transitions. [2022-11-20 19:44:40,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 19:44:40,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:40,465 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-20 19:44:40,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:40,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2022-11-20 19:44:40,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-11-20 19:44:41,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:44:41,079 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 19:44:41,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:41,079 INFO L85 PathProgramCache]: Analyzing trace with hash 570866163, now seen corresponding path program 1 times [2022-11-20 19:44:41,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:41,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1944775280] [2022-11-20 19:44:41,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:41,080 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 [2022-11-20 19:44:41,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:41,081 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 19:44:41,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 19:44:41,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:41,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 19:44:41,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:41,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:44:41,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:44:41,393 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-11-20 19:44:41,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 36 [2022-11-20 19:44:41,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-20 19:44:41,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:41,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:44:41,565 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:41,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1944775280] [2022-11-20 19:44:41,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1944775280] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:44:41,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:44:41,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 19:44:41,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103677404] [2022-11-20 19:44:41,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:44:41,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:44:41,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:41,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:44:41,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:44:41,567 INFO L87 Difference]: Start difference. First operand 651 states and 2486 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) [2022-11-20 19:44:41,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:41,695 INFO L93 Difference]: Finished difference Result 648 states and 2476 transitions. [2022-11-20 19:44:41,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:44:41,695 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 [2022-11-20 19:44:41,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:41,700 INFO L225 Difference]: With dead ends: 648 [2022-11-20 19:44:41,700 INFO L226 Difference]: Without dead ends: 648 [2022-11-20 19:44:41,700 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 [2022-11-20 19:44:41,701 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:41,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-20 19:44:41,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-11-20 19:44:41,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 648. [2022-11-20 19:44:41,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 606 states have (on average 4.085808580858086) internal successors, (2476), 647 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:41,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 2476 transitions. [2022-11-20 19:44:41,723 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 2476 transitions. Word has length 9 [2022-11-20 19:44:41,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:41,723 INFO L495 AbstractCegarLoop]: Abstraction has 648 states and 2476 transitions. [2022-11-20 19:44:41,723 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) [2022-11-20 19:44:41,723 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 2476 transitions. [2022-11-20 19:44:41,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 19:44:41,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:41,724 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-20 19:44:41,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 19:44:41,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:41,937 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 19:44:41,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:41,937 INFO L85 PathProgramCache]: Analyzing trace with hash 570866783, now seen corresponding path program 1 times [2022-11-20 19:44:41,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:41,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [603323819] [2022-11-20 19:44:41,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:41,938 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 [2022-11-20 19:44:41,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:41,939 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 19:44:41,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 19:44:42,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:42,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 19:44:42,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:42,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:44:42,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:44:42,217 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-11-20 19:44:42,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 36 [2022-11-20 19:44:42,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-20 19:44:42,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:42,401 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:44:42,402 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:42,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [603323819] [2022-11-20 19:44:42,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [603323819] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:44:42,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:44:42,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 19:44:42,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951676349] [2022-11-20 19:44:42,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:44:42,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:44:42,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:42,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:44:42,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:44:42,405 INFO L87 Difference]: Start difference. First operand 648 states and 2476 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) [2022-11-20 19:44:42,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:42,536 INFO L93 Difference]: Finished difference Result 649 states and 2477 transitions. [2022-11-20 19:44:42,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:44:42,537 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 [2022-11-20 19:44:42,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:42,541 INFO L225 Difference]: With dead ends: 649 [2022-11-20 19:44:42,541 INFO L226 Difference]: Without dead ends: 649 [2022-11-20 19:44:42,541 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 [2022-11-20 19:44:42,542 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:42,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-20 19:44:42,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-11-20 19:44:42,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 649. [2022-11-20 19:44:42,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 607 states have (on average 4.080724876441516) internal successors, (2477), 648 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:42,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 2477 transitions. [2022-11-20 19:44:42,580 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 2477 transitions. Word has length 9 [2022-11-20 19:44:42,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:42,580 INFO L495 AbstractCegarLoop]: Abstraction has 649 states and 2477 transitions. [2022-11-20 19:44:42,580 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) [2022-11-20 19:44:42,580 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 2477 transitions. [2022-11-20 19:44:42,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 19:44:42,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:42,581 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-20 19:44:42,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 19:44:42,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:42,794 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 19:44:42,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:42,794 INFO L85 PathProgramCache]: Analyzing trace with hash 570938380, now seen corresponding path program 1 times [2022-11-20 19:44:42,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:42,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1791366646] [2022-11-20 19:44:42,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:42,795 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 [2022-11-20 19:44:42,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:42,796 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 19:44:42,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 19:44:42,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:42,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 19:44:42,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:43,022 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-20 19:44:43,023 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 [2022-11-20 19:44:43,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:43,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:44:43,066 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:43,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1791366646] [2022-11-20 19:44:43,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1791366646] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:44:43,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:44:43,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 19:44:43,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025374894] [2022-11-20 19:44:43,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:44:43,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:44:43,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:43,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:44:43,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:44:43,068 INFO L87 Difference]: Start difference. First operand 649 states and 2477 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) [2022-11-20 19:44:43,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:43,247 INFO L93 Difference]: Finished difference Result 617 states and 2373 transitions. [2022-11-20 19:44:43,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:44:43,248 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 [2022-11-20 19:44:43,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:43,252 INFO L225 Difference]: With dead ends: 617 [2022-11-20 19:44:43,252 INFO L226 Difference]: Without dead ends: 617 [2022-11-20 19:44:43,253 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 [2022-11-20 19:44:43,253 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:43,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 0 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:44:43,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-11-20 19:44:43,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 617. [2022-11-20 19:44:43,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 581 states have (on average 4.0843373493975905) internal successors, (2373), 616 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:43,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 2373 transitions. [2022-11-20 19:44:43,274 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 2373 transitions. Word has length 9 [2022-11-20 19:44:43,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:43,274 INFO L495 AbstractCegarLoop]: Abstraction has 617 states and 2373 transitions. [2022-11-20 19:44:43,275 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) [2022-11-20 19:44:43,275 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 2373 transitions. [2022-11-20 19:44:43,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 19:44:43,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:43,276 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-20 19:44:43,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 19:44:43,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:43,488 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 19:44:43,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:43,488 INFO L85 PathProgramCache]: Analyzing trace with hash 570938379, now seen corresponding path program 1 times [2022-11-20 19:44:43,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:43,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1126218386] [2022-11-20 19:44:43,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:43,489 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 [2022-11-20 19:44:43,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:43,490 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 19:44:43,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-20 19:44:43,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:43,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 19:44:43,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:43,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:44:43,782 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-20 19:44:43,782 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 [2022-11-20 19:44:43,802 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 934 treesize of output 902 [2022-11-20 19:44:43,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:43,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:44:43,930 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:43,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1126218386] [2022-11-20 19:44:43,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1126218386] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:44:43,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:44:43,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 19:44:43,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388508790] [2022-11-20 19:44:43,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:44:43,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:44:43,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:43,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:44:43,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:44:43,932 INFO L87 Difference]: Start difference. First operand 617 states and 2373 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) [2022-11-20 19:44:44,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:44,116 INFO L93 Difference]: Finished difference Result 585 states and 2269 transitions. [2022-11-20 19:44:44,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:44:44,117 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 [2022-11-20 19:44:44,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:44,121 INFO L225 Difference]: With dead ends: 585 [2022-11-20 19:44:44,121 INFO L226 Difference]: Without dead ends: 585 [2022-11-20 19:44:44,122 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 [2022-11-20 19:44:44,122 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:44,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 0 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:44:44,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-11-20 19:44:44,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 585. [2022-11-20 19:44:44,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 555 states have (on average 4.088288288288289) internal successors, (2269), 584 states have internal predecessors, (2269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:44,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 2269 transitions. [2022-11-20 19:44:44,150 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 2269 transitions. Word has length 9 [2022-11-20 19:44:44,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:44,150 INFO L495 AbstractCegarLoop]: Abstraction has 585 states and 2269 transitions. [2022-11-20 19:44:44,150 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) [2022-11-20 19:44:44,150 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 2269 transitions. [2022-11-20 19:44:44,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 19:44:44,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:44,151 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:44:44,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:44,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:44,363 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 19:44:44,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:44,364 INFO L85 PathProgramCache]: Analyzing trace with hash 516986699, now seen corresponding path program 1 times [2022-11-20 19:44:44,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:44,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [961167034] [2022-11-20 19:44:44,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:44,365 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 [2022-11-20 19:44:44,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:44,366 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 19:44:44,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-20 19:44:44,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:44,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 19:44:44,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:44,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:44:44,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:44:44,678 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-11-20 19:44:44,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 36 [2022-11-20 19:44:44,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-20 19:44:44,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 19:44:44,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:44:44,865 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:44,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [961167034] [2022-11-20 19:44:44,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [961167034] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:44:44,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:44:44,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 19:44:44,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032845315] [2022-11-20 19:44:44,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:44:44,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:44:44,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:44,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:44:44,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:44:44,867 INFO L87 Difference]: Start difference. First operand 585 states and 2269 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2022-11-20 19:44:44,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:44,973 INFO L93 Difference]: Finished difference Result 584 states and 2268 transitions. [2022-11-20 19:44:44,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:44:44,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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 [2022-11-20 19:44:44,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:44,977 INFO L225 Difference]: With dead ends: 584 [2022-11-20 19:44:44,978 INFO L226 Difference]: Without dead ends: 584 [2022-11-20 19:44:44,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:44:44,979 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:44,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-11-20 19:44:44,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-11-20 19:44:44,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 583. [2022-11-20 19:44:44,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 554 states have (on average 4.092057761732852) internal successors, (2267), 582 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:44,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 2267 transitions. [2022-11-20 19:44:44,998 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 2267 transitions. Word has length 10 [2022-11-20 19:44:44,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:44,998 INFO L495 AbstractCegarLoop]: Abstraction has 583 states and 2267 transitions. [2022-11-20 19:44:44,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 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) [2022-11-20 19:44:44,999 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 2267 transitions. [2022-11-20 19:44:44,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 19:44:44,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:44,999 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:44:45,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:45,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:45,212 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 19:44:45,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:45,213 INFO L85 PathProgramCache]: Analyzing trace with hash 519220848, now seen corresponding path program 1 times [2022-11-20 19:44:45,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:45,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [848338196] [2022-11-20 19:44:45,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:45,213 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:45,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:45,214 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 19:44:45,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 19:44:45,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:45,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 19:44:45,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:45,464 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 19:44:45,464 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 [2022-11-20 19:44:45,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:45,540 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:44:45,540 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:45,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [848338196] [2022-11-20 19:44:45,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [848338196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:44:45,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:44:45,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:44:45,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544640053] [2022-11-20 19:44:45,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:44:45,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 19:44:45,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:45,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 19:44:45,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:44:45,542 INFO L87 Difference]: Start difference. First operand 583 states and 2267 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) [2022-11-20 19:44:45,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:45,877 INFO L93 Difference]: Finished difference Result 869 states and 3389 transitions. [2022-11-20 19:44:45,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:44:45,877 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 [2022-11-20 19:44:45,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:45,883 INFO L225 Difference]: With dead ends: 869 [2022-11-20 19:44:45,883 INFO L226 Difference]: Without dead ends: 869 [2022-11-20 19:44:45,883 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 [2022-11-20 19:44:45,884 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 82 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:45,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 0 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 19:44:45,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-11-20 19:44:45,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 721. [2022-11-20 19:44:45,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 692 states have (on average 4.273121387283237) internal successors, (2957), 720 states have internal predecessors, (2957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:45,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 2957 transitions. [2022-11-20 19:44:45,935 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 2957 transitions. Word has length 10 [2022-11-20 19:44:45,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:45,937 INFO L495 AbstractCegarLoop]: Abstraction has 721 states and 2957 transitions. [2022-11-20 19:44:45,938 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) [2022-11-20 19:44:45,938 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 2957 transitions. [2022-11-20 19:44:45,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 19:44:45,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:45,943 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2022-11-20 19:44:45,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:46,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:46,155 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 19:44:46,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:46,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1153296436, now seen corresponding path program 2 times [2022-11-20 19:44:46,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:46,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [73410349] [2022-11-20 19:44:46,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 19:44:46,156 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 [2022-11-20 19:44:46,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:46,157 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 19:44:46,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-20 19:44:46,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 19:44:46,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:44:46,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 19:44:46,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:46,362 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:46,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:46,430 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:46,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [73410349] [2022-11-20 19:44:46,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [73410349] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:46,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [754968648] [2022-11-20 19:44:46,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 19:44:46,430 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:44:46,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:44:46,431 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:44:46,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-20 19:44:46,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 19:44:46,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:44:46,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 19:44:46,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:46,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:46,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:46,811 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:46,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [754968648] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:46,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060490122] [2022-11-20 19:44:46,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 19:44:46,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:44:46,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:44:46,815 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:44:46,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-20 19:44:47,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 19:44:47,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:44:47,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 19:44:47,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:47,155 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 19:44:47,155 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 [2022-11-20 19:44:47,340 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:47,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:47,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060490122] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:47,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:44:47,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 5] total 19 [2022-11-20 19:44:47,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192613970] [2022-11-20 19:44:47,880 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:44:47,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 19:44:47,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:47,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 19:44:47,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-11-20 19:44:47,887 INFO L87 Difference]: Start difference. First operand 721 states and 2957 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) [2022-11-20 19:44:49,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:49,501 INFO L93 Difference]: Finished difference Result 1114 states and 3922 transitions. [2022-11-20 19:44:49,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 19:44:49,502 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 [2022-11-20 19:44:49,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:49,508 INFO L225 Difference]: With dead ends: 1114 [2022-11-20 19:44:49,508 INFO L226 Difference]: Without dead ends: 1114 [2022-11-20 19:44:49,508 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 [2022-11-20 19:44:49,509 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 571 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:49,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [571 Valid, 0 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-20 19:44:49,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2022-11-20 19:44:49,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 628. [2022-11-20 19:44:49,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 628 states, 612 states have (on average 4.104575163398692) internal successors, (2512), 627 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:49,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 2512 transitions. [2022-11-20 19:44:49,553 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 2512 transitions. Word has length 11 [2022-11-20 19:44:49,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:49,555 INFO L495 AbstractCegarLoop]: Abstraction has 628 states and 2512 transitions. [2022-11-20 19:44:49,555 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) [2022-11-20 19:44:49,555 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 2512 transitions. [2022-11-20 19:44:49,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 19:44:49,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:49,560 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:44:49,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:49,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2022-11-20 19:44:49,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-11-20 19:44:50,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:50,169 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 19:44:50,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:50,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1084019575, now seen corresponding path program 1 times [2022-11-20 19:44:50,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:50,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [605103589] [2022-11-20 19:44:50,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:50,170 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 [2022-11-20 19:44:50,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:50,171 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 19:44:50,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 19:44:50,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:50,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 19:44:50,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:50,472 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 19:44:50,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-20 19:44:50,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:50,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:50,929 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:50,929 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:50,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [605103589] [2022-11-20 19:44:50,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [605103589] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:50,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [69743425] [2022-11-20 19:44:50,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:50,930 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:44:50,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:44:50,931 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:44:50,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-20 19:44:51,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:51,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 19:44:51,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:51,330 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 19:44:51,330 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 [2022-11-20 19:44:51,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:51,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:51,502 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:51,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [69743425] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:51,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763932670] [2022-11-20 19:44:51,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:51,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:44:51,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:44:51,503 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:44:51,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-20 19:44:51,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:51,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 19:44:51,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:51,803 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 19:44:51,803 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 [2022-11-20 19:44:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:51,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:51,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:51,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763932670] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:51,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:44:51,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 8 [2022-11-20 19:44:51,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744219352] [2022-11-20 19:44:51,973 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:44:51,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 19:44:51,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:51,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 19:44:51,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 19:44:51,974 INFO L87 Difference]: Start difference. First operand 628 states and 2512 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) [2022-11-20 19:44:52,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:52,987 INFO L93 Difference]: Finished difference Result 1258 states and 4786 transitions. [2022-11-20 19:44:52,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 19:44:52,988 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 [2022-11-20 19:44:52,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:52,994 INFO L225 Difference]: With dead ends: 1258 [2022-11-20 19:44:52,994 INFO L226 Difference]: Without dead ends: 1258 [2022-11-20 19:44:52,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-11-20 19:44:52,995 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 181 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:52,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 0 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 19:44:52,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2022-11-20 19:44:53,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 868. [2022-11-20 19:44:53,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 852 states have (on average 4.328638497652582) internal successors, (3688), 867 states have internal predecessors, (3688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:53,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 3688 transitions. [2022-11-20 19:44:53,028 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 3688 transitions. Word has length 11 [2022-11-20 19:44:53,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:53,029 INFO L495 AbstractCegarLoop]: Abstraction has 868 states and 3688 transitions. [2022-11-20 19:44:53,029 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) [2022-11-20 19:44:53,029 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 3688 transitions. [2022-11-20 19:44:53,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 19:44:53,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:53,030 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:44:53,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:53,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2022-11-20 19:44:53,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-11-20 19:44:53,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:53,637 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 19:44:53,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:53,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1083997649, now seen corresponding path program 1 times [2022-11-20 19:44:53,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:53,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [787575569] [2022-11-20 19:44:53,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:53,638 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 [2022-11-20 19:44:53,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:53,639 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 19:44:53,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 19:44:53,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:53,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 19:44:53,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:53,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:53,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:44:53,818 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:53,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [787575569] [2022-11-20 19:44:53,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [787575569] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:44:53,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:44:53,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 19:44:53,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55957062] [2022-11-20 19:44:53,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:44:53,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:44:53,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:53,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:44:53,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:44:53,820 INFO L87 Difference]: Start difference. First operand 868 states and 3688 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:53,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:53,970 INFO L93 Difference]: Finished difference Result 700 states and 2888 transitions. [2022-11-20 19:44:53,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:44:53,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 19:44:53,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:53,973 INFO L225 Difference]: With dead ends: 700 [2022-11-20 19:44:53,973 INFO L226 Difference]: Without dead ends: 700 [2022-11-20 19:44:53,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:44:53,973 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:53,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 0 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:44:53,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-11-20 19:44:53,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 700. [2022-11-20 19:44:53,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 688 states have (on average 4.1976744186046515) internal successors, (2888), 699 states have internal predecessors, (2888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:53,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 2888 transitions. [2022-11-20 19:44:53,995 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 2888 transitions. Word has length 11 [2022-11-20 19:44:53,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:53,995 INFO L495 AbstractCegarLoop]: Abstraction has 700 states and 2888 transitions. [2022-11-20 19:44:53,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:53,996 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 2888 transitions. [2022-11-20 19:44:53,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 19:44:53,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:53,996 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:44:54,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 19:44:54,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:54,208 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 19:44:54,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:54,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1083997648, now seen corresponding path program 1 times [2022-11-20 19:44:54,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:54,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1774419864] [2022-11-20 19:44:54,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:54,209 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 [2022-11-20 19:44:54,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:54,210 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 19:44:54,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-20 19:44:54,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:54,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 19:44:54,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:54,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:54,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:44:54,446 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:54,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1774419864] [2022-11-20 19:44:54,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1774419864] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:44:54,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:44:54,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 19:44:54,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324989979] [2022-11-20 19:44:54,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:44:54,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:44:54,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:54,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:44:54,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:44:54,448 INFO L87 Difference]: Start difference. First operand 700 states and 2888 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:54,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:54,593 INFO L93 Difference]: Finished difference Result 532 states and 2088 transitions. [2022-11-20 19:44:54,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:44:54,594 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 19:44:54,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:54,596 INFO L225 Difference]: With dead ends: 532 [2022-11-20 19:44:54,596 INFO L226 Difference]: Without dead ends: 532 [2022-11-20 19:44:54,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:44:54,597 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 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 [2022-11-20 19:44:54,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 0 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:44:54,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-11-20 19:44:54,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 532. [2022-11-20 19:44:54,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 524 states have (on average 3.984732824427481) internal successors, (2088), 531 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:54,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 2088 transitions. [2022-11-20 19:44:54,614 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 2088 transitions. Word has length 11 [2022-11-20 19:44:54,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:54,614 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 2088 transitions. [2022-11-20 19:44:54,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:54,614 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 2088 transitions. [2022-11-20 19:44:54,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 19:44:54,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:54,615 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:44:54,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:54,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:54,827 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 19:44:54,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:54,827 INFO L85 PathProgramCache]: Analyzing trace with hash 755812836, now seen corresponding path program 1 times [2022-11-20 19:44:54,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:54,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [219196367] [2022-11-20 19:44:54,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:54,828 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 [2022-11-20 19:44:54,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:54,829 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 19:44:54,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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)] Waiting until timeout for monitored process [2022-11-20 19:44:54,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:54,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 19:44:54,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:55,095 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 19:44:55,096 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 [2022-11-20 19:44:55,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:55,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:44:55,185 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:55,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [219196367] [2022-11-20 19:44:55,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [219196367] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:44:55,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:44:55,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:44:55,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341146594] [2022-11-20 19:44:55,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:44:55,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 19:44:55,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:55,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 19:44:55,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:44:55,188 INFO L87 Difference]: Start difference. First operand 532 states and 2088 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) [2022-11-20 19:44:55,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:55,484 INFO L93 Difference]: Finished difference Result 748 states and 2958 transitions. [2022-11-20 19:44:55,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:44:55,485 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 [2022-11-20 19:44:55,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:55,488 INFO L225 Difference]: With dead ends: 748 [2022-11-20 19:44:55,488 INFO L226 Difference]: Without dead ends: 748 [2022-11-20 19:44:55,488 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 [2022-11-20 19:44:55,489 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 68 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:55,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 0 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 19:44:55,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-11-20 19:44:55,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 639. [2022-11-20 19:44:55,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 631 states have (on average 4.166402535657686) internal successors, (2629), 638 states have internal predecessors, (2629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:55,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2629 transitions. [2022-11-20 19:44:55,518 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2629 transitions. Word has length 12 [2022-11-20 19:44:55,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:55,518 INFO L495 AbstractCegarLoop]: Abstraction has 639 states and 2629 transitions. [2022-11-20 19:44:55,518 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) [2022-11-20 19:44:55,518 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2629 transitions. [2022-11-20 19:44:55,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 19:44:55,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:55,519 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:44:55,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:55,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:44:55,732 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 19:44:55,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:55,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1934347625, now seen corresponding path program 2 times [2022-11-20 19:44:55,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:55,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [303860338] [2022-11-20 19:44:55,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 19:44:55,734 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 [2022-11-20 19:44:55,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:55,735 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 19:44:55,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 19:44:55,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 19:44:55,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:44:55,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 19:44:55,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:55,976 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:55,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:56,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:56,041 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:44:56,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [303860338] [2022-11-20 19:44:56,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [303860338] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:56,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1160080037] [2022-11-20 19:44:56,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 19:44:56,041 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:44:56,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:44:56,042 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:44:56,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-20 19:44:56,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 19:44:56,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:44:56,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 19:44:56,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:56,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:56,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:56,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:56,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1160080037] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:56,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421375654] [2022-11-20 19:44:56,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 19:44:56,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:44:56,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:44:56,462 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:44:56,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-20 19:44:56,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 19:44:56,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:44:56,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 19:44:56,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:44:56,795 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 19:44:56,796 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 [2022-11-20 19:44:56,976 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:56,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:44:57,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:44:57,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421375654] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:44:57,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:44:57,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 5] total 19 [2022-11-20 19:44:57,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409626886] [2022-11-20 19:44:57,561 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:44:57,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 19:44:57,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:44:57,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 19:44:57,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-11-20 19:44:57,562 INFO L87 Difference]: Start difference. First operand 639 states and 2629 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) [2022-11-20 19:44:59,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:44:59,125 INFO L93 Difference]: Finished difference Result 849 states and 3013 transitions. [2022-11-20 19:44:59,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 19:44:59,126 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 [2022-11-20 19:44:59,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:44:59,130 INFO L225 Difference]: With dead ends: 849 [2022-11-20 19:44:59,130 INFO L226 Difference]: Without dead ends: 849 [2022-11-20 19:44:59,130 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 [2022-11-20 19:44:59,131 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 364 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 19:44:59,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 0 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-20 19:44:59,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-11-20 19:44:59,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 552. [2022-11-20 19:44:59,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 548 states have (on average 4.036496350364963) internal successors, (2212), 551 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:44:59,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 2212 transitions. [2022-11-20 19:44:59,159 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 2212 transitions. Word has length 13 [2022-11-20 19:44:59,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:44:59,160 INFO L495 AbstractCegarLoop]: Abstraction has 552 states and 2212 transitions. [2022-11-20 19:44:59,160 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) [2022-11-20 19:44:59,160 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 2212 transitions. [2022-11-20 19:44:59,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 19:44:59,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:44:59,162 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:44:59,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-20 19:44:59,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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)] Ended with exit code 0 [2022-11-20 19:44:59,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2022-11-20 19:44:59,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt [2022-11-20 19:44:59,771 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 19:44:59,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:44:59,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1955364635, now seen corresponding path program 1 times [2022-11-20 19:44:59,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:44:59,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1540352180] [2022-11-20 19:44:59,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:44:59,772 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 [2022-11-20 19:44:59,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:44:59,772 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 19:44:59,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 19:44:59,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:44:59,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 19:44:59,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:45:00,103 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 19:45:00,103 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 [2022-11-20 19:45:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:45:00,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:45:00,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:45:00,600 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:45:00,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1540352180] [2022-11-20 19:45:00,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1540352180] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:45:00,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [926346554] [2022-11-20 19:45:00,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:45:00,600 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:45:00,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:45:00,601 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:45:00,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-20 19:45:00,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:45:00,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 19:45:00,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:45:01,048 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 19:45:01,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-20 19:45:01,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:45:01,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:45:01,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:45:01,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [926346554] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:45:01,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615632375] [2022-11-20 19:45:01,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:45:01,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:45:01,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:45:01,230 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:45:01,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-20 19:45:01,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:45:01,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 19:45:01,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:45:01,550 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 19:45:01,550 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 [2022-11-20 19:45:01,620 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:45:01,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:45:01,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:45:01,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615632375] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:45:01,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:45:01,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 8 [2022-11-20 19:45:01,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351682990] [2022-11-20 19:45:01,737 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:45:01,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 19:45:01,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:45:01,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 19:45:01,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-20 19:45:01,738 INFO L87 Difference]: Start difference. First operand 552 states and 2212 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) [2022-11-20 19:45:02,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:45:02,538 INFO L93 Difference]: Finished difference Result 1018 states and 3946 transitions. [2022-11-20 19:45:02,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 19:45:02,539 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 [2022-11-20 19:45:02,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:45:02,543 INFO L225 Difference]: With dead ends: 1018 [2022-11-20 19:45:02,544 INFO L226 Difference]: Without dead ends: 1018 [2022-11-20 19:45:02,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-11-20 19:45:02,544 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 186 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 19:45:02,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 0 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 19:45:02,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2022-11-20 19:45:02,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 736. [2022-11-20 19:45:02,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 732 states have (on average 4.26775956284153) internal successors, (3124), 735 states have internal predecessors, (3124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:45:02,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 3124 transitions. [2022-11-20 19:45:02,569 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 3124 transitions. Word has length 13 [2022-11-20 19:45:02,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:45:02,570 INFO L495 AbstractCegarLoop]: Abstraction has 736 states and 3124 transitions. [2022-11-20 19:45:02,570 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) [2022-11-20 19:45:02,570 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 3124 transitions. [2022-11-20 19:45:02,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 19:45:02,571 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:45:02,571 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:45:02,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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 [2022-11-20 19:45:02,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (43)] Ended with exit code 0 [2022-11-20 19:45:02,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-11-20 19:45:03,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:45:03,184 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 19:45:03,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:45:03,185 INFO L85 PathProgramCache]: Analyzing trace with hash -260693883, now seen corresponding path program 1 times [2022-11-20 19:45:03,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:45:03,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1485803897] [2022-11-20 19:45:03,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:45:03,185 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 [2022-11-20 19:45:03,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:45:03,186 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 19:45:03,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-20 19:45:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:45:03,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 19:45:03,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:45:03,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:45:03,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:45:03,446 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:45:03,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1485803897] [2022-11-20 19:45:03,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1485803897] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:45:03,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:45:03,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 19:45:03,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662198537] [2022-11-20 19:45:03,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:45:03,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:45:03,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:45:03,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:45:03,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:45:03,448 INFO L87 Difference]: Start difference. First operand 736 states and 3124 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:45:03,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:45:03,587 INFO L93 Difference]: Finished difference Result 694 states and 2966 transitions. [2022-11-20 19:45:03,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:45:03,587 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-20 19:45:03,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:45:03,590 INFO L225 Difference]: With dead ends: 694 [2022-11-20 19:45:03,590 INFO L226 Difference]: Without dead ends: 694 [2022-11-20 19:45:03,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:45:03,591 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:45:03,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 0 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:45:03,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-11-20 19:45:03,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 694. [2022-11-20 19:45:03,606 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) [2022-11-20 19:45:03,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 2966 transitions. [2022-11-20 19:45:03,609 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 2966 transitions. Word has length 15 [2022-11-20 19:45:03,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:45:03,610 INFO L495 AbstractCegarLoop]: Abstraction has 694 states and 2966 transitions. [2022-11-20 19:45:03,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:45:03,610 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 2966 transitions. [2022-11-20 19:45:03,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 19:45:03,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:45:03,612 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:45:03,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-20 19:45:03,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:45:03,824 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 19:45:03,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:45:03,824 INFO L85 PathProgramCache]: Analyzing trace with hash -2090159045, now seen corresponding path program 2 times [2022-11-20 19:45:03,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:45:03,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2119852221] [2022-11-20 19:45:03,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 19:45:03,825 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:45:03,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:45:03,826 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 19:45:03,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-20 19:45:04,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 19:45:04,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:45:04,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 19:45:04,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:45:04,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:45:04,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:45:04,133 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:45:04,133 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:45:04,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2119852221] [2022-11-20 19:45:04,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2119852221] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:45:04,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2093126625] [2022-11-20 19:45:04,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 19:45:04,134 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:45:04,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:45:04,135 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:45:04,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-20 19:45:04,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 19:45:04,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:45:04,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 19:45:04,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:45:04,684 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:45:04,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:45:04,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:45:04,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2093126625] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:45:04,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113606403] [2022-11-20 19:45:04,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 19:45:04,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:45:04,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:45:04,704 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:45:04,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-20 19:45:04,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 19:45:04,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:45:04,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 19:45:04,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:45:05,114 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-20 19:45:05,115 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 [2022-11-20 19:45:05,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:45:05,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:45:05,915 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:45:05,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113606403] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:45:05,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:45:05,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 5] total 19 [2022-11-20 19:45:05,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341282703] [2022-11-20 19:45:05,916 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:45:05,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 19:45:05,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:45:05,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 19:45:05,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-11-20 19:45:05,917 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) [2022-11-20 19:45:07,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:45:07,287 INFO L93 Difference]: Finished difference Result 872 states and 3316 transitions. [2022-11-20 19:45:07,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 19:45:07,287 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 [2022-11-20 19:45:07,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:45:07,291 INFO L225 Difference]: With dead ends: 872 [2022-11-20 19:45:07,291 INFO L226 Difference]: Without dead ends: 872 [2022-11-20 19:45:07,291 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 [2022-11-20 19:45:07,292 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 270 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:45:07,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 0 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 19:45:07,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2022-11-20 19:45:07,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 608. [2022-11-20 19:45:07,312 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) [2022-11-20 19:45:07,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 2536 transitions. [2022-11-20 19:45:07,315 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 2536 transitions. Word has length 15 [2022-11-20 19:45:07,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:45:07,316 INFO L495 AbstractCegarLoop]: Abstraction has 608 states and 2536 transitions. [2022-11-20 19:45:07,316 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) [2022-11-20 19:45:07,316 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 2536 transitions. [2022-11-20 19:45:07,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 19:45:07,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:45:07,319 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] [2022-11-20 19:45:07,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-11-20 19:45:07,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (47)] Ended with exit code 0 [2022-11-20 19:45:07,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-11-20 19:45:07,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:45:07,928 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 19:45:07,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:45:07,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1417120402, now seen corresponding path program 1 times [2022-11-20 19:45:07,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:45:07,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1781297869] [2022-11-20 19:45:07,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:45:07,930 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 [2022-11-20 19:45:07,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:45:07,931 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 19:45:07,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-20 19:45:08,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:45:08,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 19:45:08,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:45:08,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:45:08,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:45:08,350 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:45:08,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1781297869] [2022-11-20 19:45:08,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1781297869] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:45:08,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:45:08,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:45:08,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9276856] [2022-11-20 19:45:08,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:45:08,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:45:08,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:45:08,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:45:08,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:45:08,352 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) [2022-11-20 19:45:08,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:45:08,780 INFO L93 Difference]: Finished difference Result 779 states and 3087 transitions. [2022-11-20 19:45:08,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 19:45:08,781 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 [2022-11-20 19:45:08,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:45:08,784 INFO L225 Difference]: With dead ends: 779 [2022-11-20 19:45:08,784 INFO L226 Difference]: Without dead ends: 608 [2022-11-20 19:45:08,784 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 [2022-11-20 19:45:08,785 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, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 19:45:08,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 0 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 19:45:08,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-11-20 19:45:08,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 608. [2022-11-20 19:45:08,801 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) [2022-11-20 19:45:08,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 2450 transitions. [2022-11-20 19:45:08,804 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 2450 transitions. Word has length 23 [2022-11-20 19:45:08,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:45:08,804 INFO L495 AbstractCegarLoop]: Abstraction has 608 states and 2450 transitions. [2022-11-20 19:45:08,805 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) [2022-11-20 19:45:08,805 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 2450 transitions. [2022-11-20 19:45:08,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 19:45:08,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:45:08,807 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] [2022-11-20 19:45:08,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-11-20 19:45:09,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:45:09,020 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 19:45:09,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:45:09,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1017986214, now seen corresponding path program 1 times [2022-11-20 19:45:09,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:45:09,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1002905280] [2022-11-20 19:45:09,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:45:09,022 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 [2022-11-20 19:45:09,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:45:09,022 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 19:45:09,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-20 19:45:09,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:45:09,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 19:45:09,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:45:09,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:45:09,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 19:45:09,411 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:45:09,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1002905280] [2022-11-20 19:45:09,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1002905280] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:45:09,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:45:09,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:45:09,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153464274] [2022-11-20 19:45:09,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:45:09,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:45:09,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:45:09,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:45:09,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:45:09,413 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) [2022-11-20 19:45:09,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:45:09,775 INFO L93 Difference]: Finished difference Result 717 states and 2749 transitions. [2022-11-20 19:45:09,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 19:45:09,776 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 [2022-11-20 19:45:09,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:45:09,779 INFO L225 Difference]: With dead ends: 717 [2022-11-20 19:45:09,779 INFO L226 Difference]: Without dead ends: 608 [2022-11-20 19:45:09,779 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 [2022-11-20 19:45:09,780 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, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 19:45:09,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 0 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 19:45:09,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-11-20 19:45:09,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 608. [2022-11-20 19:45:09,794 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) [2022-11-20 19:45:09,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 2354 transitions. [2022-11-20 19:45:09,797 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 2354 transitions. Word has length 24 [2022-11-20 19:45:09,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:45:09,797 INFO L495 AbstractCegarLoop]: Abstraction has 608 states and 2354 transitions. [2022-11-20 19:45:09,797 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) [2022-11-20 19:45:09,798 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 2354 transitions. [2022-11-20 19:45:09,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 19:45:09,800 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:45:09,800 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] [2022-11-20 19:45:09,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Forceful destruction successful, exit code 0 [2022-11-20 19:45:10,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:45:10,014 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 19:45:10,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:45:10,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1900738281, now seen corresponding path program 1 times [2022-11-20 19:45:10,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:45:10,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725228295] [2022-11-20 19:45:10,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:45:10,016 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 [2022-11-20 19:45:10,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:45:10,017 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 19:45:10,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-20 19:45:10,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:45:10,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 19:45:10,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:45:10,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:45:10,826 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 [2022-11-20 19:45:11,446 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 [2022-11-20 19:45:19,717 WARN L233 SmtUtils]: Spent 7.87s 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) [2022-11-20 19:45:27,679 WARN L233 SmtUtils]: Spent 7.70s 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) [2022-11-20 19:45:28,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:45:28,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:45:32,499 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-11-20 19:45:32,499 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 [2022-11-20 19:45:32,530 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:45:32,530 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 [2022-11-20 19:48:01,862 WARN L233 SmtUtils]: Spent 2.44m on a formula simplification. DAG size of input: 262 DAG size of output: 85 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:48:02,030 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:48:02,030 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:48:02,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725228295] [2022-11-20 19:48:02,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [725228295] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:48:02,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [968913623] [2022-11-20 19:48:02,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:02,030 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:48:02,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:48:02,033 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:48:02,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-11-20 19:48:02,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:02,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 19:48:02,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:48:03,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:03,229 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 [2022-11-20 19:48:03,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:48:03,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:03,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:03,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:03,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:48:03,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:03,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:48:03,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:48:03,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:48:03,871 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 [2022-11-20 19:48:09,459 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:48:09,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:48:11,200 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-11-20 19:48:11,201 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 [2022-11-20 19:48:11,226 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:48:11,226 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 [2022-11-20 19:49:59,089 WARN L233 SmtUtils]: Spent 1.72m on a formula simplification. DAG size of input: 229 DAG size of output: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:49:59,121 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:49:59,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [968913623] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:49:59,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611166242] [2022-11-20 19:49:59,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:49:59,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:49:59,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:49:59,123 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:49:59,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-20 19:49:59,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:49:59,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 19:49:59,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:49:59,392 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 79 treesize of output 77 [2022-11-20 19:50:00,262 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 [2022-11-20 19:50:01,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:01,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:01,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:01,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:01,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:01,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:01,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:01,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:50:01,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:01,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:50:01,376 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:50:01,376 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 [2022-11-20 19:50:10,145 WARN L233 SmtUtils]: Spent 8.34s on a formula simplification. DAG size of input: 60 DAG size of output: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:50:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:50:16,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:50:19,704 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-11-20 19:50:19,705 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 [2022-11-20 19:50:19,730 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:50:19,730 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 [2022-11-20 19:51:36,666 WARN L233 SmtUtils]: Spent 1.12m on a formula simplification. DAG size of input: 263 DAG size of output: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:51:36,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:51:36,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611166242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:51:36,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:51:36,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 11, 11] total 42 [2022-11-20 19:51:36,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590351142] [2022-11-20 19:51:36,701 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:51:36,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-20 19:51:36,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:51:36,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-20 19:51:36,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1686, Unknown=9, NotChecked=0, Total=1892 [2022-11-20 19:51:36,703 INFO L87 Difference]: Start difference. First operand 608 states and 2354 transitions. Second operand has 44 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:51:52,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:51:52,779 INFO L93 Difference]: Finished difference Result 944 states and 3416 transitions. [2022-11-20 19:51:52,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 19:51:52,782 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-20 19:51:52,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:51:52,785 INFO L225 Difference]: With dead ends: 944 [2022-11-20 19:51:52,786 INFO L226 Difference]: Without dead ends: 878 [2022-11-20 19:51:52,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 380.9s TimeCoverageRelationStatistics Valid=314, Invalid=2539, Unknown=9, NotChecked=0, Total=2862 [2022-11-20 19:51:52,787 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 79 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 376 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:51:52,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 0 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 811 Invalid, 0 Unknown, 376 Unchecked, 4.0s Time] [2022-11-20 19:51:52,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2022-11-20 19:51:52,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 639. [2022-11-20 19:51:52,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.8918495297805644) internal successors, (2483), 638 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:51:52,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2483 transitions. [2022-11-20 19:51:52,809 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2483 transitions. Word has length 25 [2022-11-20 19:51:52,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:51:52,809 INFO L495 AbstractCegarLoop]: Abstraction has 639 states and 2483 transitions. [2022-11-20 19:51:52,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 43 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:51:52,810 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2483 transitions. [2022-11-20 19:51:52,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 19:51:52,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:51:52,812 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] [2022-11-20 19:51:52,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-20 19:51:53,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (52)] Ended with exit code 0 [2022-11-20 19:51:53,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-11-20 19:51:53,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:51:53,428 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 19:51:53,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:51:53,429 INFO L85 PathProgramCache]: Analyzing trace with hash 2087132833, now seen corresponding path program 2 times [2022-11-20 19:51:53,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:51:53,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668338616] [2022-11-20 19:51:53,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 19:51:53,429 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 [2022-11-20 19:51:53,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:51:53,430 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 19:51:53,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-20 19:51:53,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 19:51:53,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:51:53,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-20 19:51:53,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:51:54,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:54,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 203 [2022-11-20 19:51:54,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:51:54,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:54,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:54,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:54,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:51:54,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:54,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:51:54,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:51:54,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:51:54,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 676 treesize of output 244 [2022-11-20 19:52:02,983 WARN L233 SmtUtils]: Spent 7.59s on a formula simplification. DAG size of input: 66 DAG size of output: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:52:09,282 WARN L233 SmtUtils]: Spent 6.11s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:52:22,531 WARN L233 SmtUtils]: Spent 12.45s on a formula simplification. DAG size of input: 72 DAG size of output: 71 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:52:29,783 WARN L233 SmtUtils]: Spent 6.12s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:52:31,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:52:31,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:52:36,076 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-11-20 19:52:36,077 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 561 treesize of output 229 [2022-11-20 19:52:36,104 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:52:36,105 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 48 treesize of output 34 [2022-11-20 19:54:52,357 WARN L233 SmtUtils]: Spent 2.22m on a formula simplification. DAG size of input: 260 DAG size of output: 82 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:54:52,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:54:52,644 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:54:52,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668338616] [2022-11-20 19:54:52,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [668338616] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:54:52,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [54623996] [2022-11-20 19:54:52,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 19:54:52,646 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:54:52,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:54:52,653 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:54:52,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-11-20 19:54:53,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 19:54:53,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:54:53,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-20 19:54:53,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:54:53,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 48 [2022-11-20 19:54:53,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 19:54:54,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:54:54,386 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 [2022-11-20 19:54:55,278 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 443 treesize of output 203 [2022-11-20 19:55:08,213 WARN L233 SmtUtils]: Spent 8.04s on a formula simplification. DAG size of input: 39 DAG size of output: 34 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:55:09,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:55:09,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:55:14,988 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2057 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse1 (bvadd (_ bv3 32) c_~nondet_0~0.offset)) (.cse2 (bvadd (_ bv2 32) c_~nondet_0~0.offset)) (.cse3 (bvadd (_ bv1 32) c_~nondet_0~0.offset))) (= (let ((.cse0 (select |c_#memory_int| c_~nondet_0~0.base))) (concat (concat (concat (select .cse0 .cse1) (select .cse0 .cse2)) (select .cse0 .cse3)) (select .cse0 c_~nondet_0~0.offset))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2057) c_~nondet_0~0.base))) (concat (concat (concat (select .cse4 .cse1) (select .cse4 .cse2)) (select .cse4 .cse3)) (select .cse4 c_~nondet_0~0.offset)))))) is different from false [2022-11-20 19:55:15,012 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2056 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_2057 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse1 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv3 32))) (.cse2 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv2 32))) (.cse3 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv1 32))) (.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_2056))) (= (let ((.cse0 (select .cse4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (concat (concat (concat (select .cse0 .cse1) (select .cse0 .cse2)) (select .cse0 .cse3)) (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (let ((.cse5 (select (store .cse4 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2057) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (concat (concat (concat (select .cse5 .cse1) (select .cse5 .cse2)) (select .cse5 .cse3)) (select .cse5 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))))) is different from false [2022-11-20 19:55:15,060 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:55:15,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 383 treesize of output 147 [2022-11-20 19:55:15,071 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:55:15,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 358 treesize of output 270 [2022-11-20 19:55:15,081 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:55:15,082 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 262 treesize of output 206 [2022-11-20 19:55:15,089 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:55:15,089 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 206 treesize of output 150 [2022-11-20 19:55:15,188 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2022-11-20 19:55:15,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [54623996] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:55:15,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895870569] [2022-11-20 19:55:15,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 19:55:15,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:55:15,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:55:15,191 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:55:15,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-20 19:55:15,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 19:55:15,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:55:15,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-20 19:55:15,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:55:15,499 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 54 treesize of output 50 [2022-11-20 19:55:16,805 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 [2022-11-20 19:55:17,714 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:55:17,715 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 6 case distinctions, treesize of input 557 treesize of output 253 [2022-11-20 19:55:26,669 WARN L233 SmtUtils]: Spent 8.37s on a formula simplification. DAG size of input: 58 DAG size of output: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:55:32,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:55:32,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:55:35,986 INFO L321 Elim1Store]: treesize reduction 132, result has 23.7 percent of original size [2022-11-20 19:55:35,986 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 557 treesize of output 225 [2022-11-20 19:55:36,017 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:55:36,018 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 [2022-11-20 19:57:01,900 WARN L233 SmtUtils]: Spent 1.30m on a formula simplification. DAG size of input: 227 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:57:01,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:57:01,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895870569] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:57:01,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-20 19:57:01,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9, 10, 11, 11] total 56 [2022-11-20 19:57:01,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361445305] [2022-11-20 19:57:01,925 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-20 19:57:01,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-20 19:57:01,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-20 19:57:01,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-20 19:57:01,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=2780, Unknown=20, NotChecked=218, Total=3306 [2022-11-20 19:57:01,927 INFO L87 Difference]: Start difference. First operand 639 states and 2483 transitions. Second operand has 58 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:57:13,012 WARN L233 SmtUtils]: Spent 8.41s on a formula simplification. DAG size of input: 90 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:57:13,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:57:13,973 INFO L93 Difference]: Finished difference Result 714 states and 2654 transitions. [2022-11-20 19:57:13,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 19:57:13,974 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 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 25 [2022-11-20 19:57:13,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:57:13,976 INFO L225 Difference]: With dead ends: 714 [2022-11-20 19:57:13,976 INFO L226 Difference]: Without dead ends: 694 [2022-11-20 19:57:13,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 1532 ImplicationChecksByTransitivity, 302.5s TimeCoverageRelationStatistics Valid=367, Invalid=3527, Unknown=20, NotChecked=246, Total=4160 [2022-11-20 19:57:13,977 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 538 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 19:57:13,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 296 Invalid, 0 Unknown, 538 Unchecked, 1.5s Time] [2022-11-20 19:57:13,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-11-20 19:57:13,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 659. [2022-11-20 19:57:13,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 3.846504559270517) internal successors, (2531), 658 states have internal predecessors, (2531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:57:13,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 2531 transitions. [2022-11-20 19:57:13,995 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 2531 transitions. Word has length 25 [2022-11-20 19:57:13,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:57:13,995 INFO L495 AbstractCegarLoop]: Abstraction has 659 states and 2531 transitions. [2022-11-20 19:57:13,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:57:13,995 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 2531 transitions. [2022-11-20 19:57:13,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 19:57:13,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:57:13,998 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] [2022-11-20 19:57:14,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-11-20 19:57:14,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (55)] Ended with exit code 0 [2022-11-20 19:57:14,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Ended with exit code 0 [2022-11-20 19:57:14,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-20 19:57:14,606 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 19:57:14,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:57:14,607 INFO L85 PathProgramCache]: Analyzing trace with hash 572329141, now seen corresponding path program 3 times [2022-11-20 19:57:14,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-20 19:57:14,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1582011972] [2022-11-20 19:57:14,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 19:57:14,607 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 [2022-11-20 19:57:14,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat [2022-11-20 19:57:14,609 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -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) [2022-11-20 19:57:14,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-20 19:57:15,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 19:57:15,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:57:15,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 19:57:15,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:57:15,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 19:57:15,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:57:15,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 353 treesize of output 301 [2022-11-20 19:57:16,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:57:16,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:57:16,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:57:16,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:57:16,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:57:16,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:57:16,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:57:16,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:57:16,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:57:16,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:57:16,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 510 treesize of output 158 [2022-11-20 19:57:25,065 WARN L233 SmtUtils]: Spent 8.24s on a formula simplification. DAG size of input: 52 DAG size of output: 44 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:57:35,847 WARN L233 SmtUtils]: Spent 6.26s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:57:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:57:40,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:57:43,717 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2152 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse1 (bvadd (_ bv3 32) c_~nondet_0~0.offset)) (.cse2 (bvadd (_ bv2 32) c_~nondet_0~0.offset)) (.cse3 (bvadd (_ bv1 32) c_~nondet_0~0.offset))) (= (let ((.cse0 (select |c_#memory_int| c_~nondet_0~0.base))) (concat (concat (concat (select .cse0 .cse1) (select .cse0 .cse2)) (select .cse0 .cse3)) (select .cse0 c_~nondet_0~0.offset))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2152) c_~nondet_0~0.base))) (concat (concat (concat (select .cse4 .cse1) (select .cse4 .cse2)) (select .cse4 .cse3)) (select .cse4 c_~nondet_0~0.offset)))))) is different from false [2022-11-20 19:57:43,746 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:57:43,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 358 treesize of output 270 [2022-11-20 19:57:43,756 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:57:43,756 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 262 treesize of output 206 [2022-11-20 19:57:43,763 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:57:43,764 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 206 treesize of output 150 [2022-11-20 19:57:43,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:57:43,877 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-20 19:57:43,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1582011972] [2022-11-20 19:57:43,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1582011972] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:57:43,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1140692407] [2022-11-20 19:57:43,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 19:57:43,877 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-20 19:57:43,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 [2022-11-20 19:57:43,878 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-20 19:57:43,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-11-20 19:57:44,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 19:57:44,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:57:44,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-20 19:57:44,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:57:44,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 48 [2022-11-20 19:57:44,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 19:57:47,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:57:47,438 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 [2022-11-20 19:57:49,292 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 557 treesize of output 253 [2022-11-20 19:57:58,008 WARN L233 SmtUtils]: Spent 8.33s on a formula simplification. DAG size of input: 62 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:58:06,436 WARN L233 SmtUtils]: Spent 8.13s 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) [2022-11-20 19:58:07,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 19:58:07,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:58:11,382 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2203 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse1 (bvadd (_ bv3 32) c_~nondet_0~0.offset)) (.cse2 (bvadd (_ bv2 32) c_~nondet_0~0.offset)) (.cse3 (bvadd (_ bv1 32) c_~nondet_0~0.offset))) (= (let ((.cse0 (select |c_#memory_int| c_~nondet_0~0.base))) (concat (concat (concat (select .cse0 .cse1) (select .cse0 .cse2)) (select .cse0 .cse3)) (select .cse0 c_~nondet_0~0.offset))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2203) c_~nondet_0~0.base))) (concat (concat (concat (select .cse4 .cse1) (select .cse4 .cse2)) (select .cse4 .cse3)) (select .cse4 c_~nondet_0~0.offset)))))) is different from false [2022-11-20 19:58:11,416 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2203 (Array (_ BitVec 32) (_ BitVec 8))) (v_ArrVal_2202 (Array (_ BitVec 32) (_ BitVec 8)))) (let ((.cse1 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv3 32))) (.cse2 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv2 32))) (.cse3 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv1 32))) (.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_2202))) (= (let ((.cse0 (select .cse4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (concat (concat (concat (select .cse0 .cse1) (select .cse0 .cse2)) (select .cse0 .cse3)) (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (let ((.cse5 (select (store .cse4 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2203) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (concat (concat (concat (select .cse5 .cse1) (select .cse5 .cse2)) (select .cse5 .cse3)) (select .cse5 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))))) is different from false [2022-11-20 19:58:11,468 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:58:11,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 383 treesize of output 147 [2022-11-20 19:58:11,479 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:58:11,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 358 treesize of output 270 [2022-11-20 19:58:11,489 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:58:11,489 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 261 treesize of output 205 [2022-11-20 19:58:11,497 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:58:11,497 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 205 treesize of output 149 [2022-11-20 19:58:11,613 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2022-11-20 19:58:11,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1140692407] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:58:11,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150032110] [2022-11-20 19:58:11,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 19:58:11,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:58:11,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:58:11,614 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:58:11,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dbbcb8a4-c8e7-4777-bd8d-2dde96f3fe7b/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-11-20 19:58:12,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 19:58:12,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 19:58:12,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-20 19:58:12,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:58:12,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-20 19:58:15,004 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 [2022-11-20 19:58:17,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:58:17,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:58:17,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:58:17,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:58:17,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:58:17,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:58:17,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:58:17,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:58:17,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:58:17,525 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 19:58:17,526 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 749 treesize of output 265 [2022-11-20 19:58:26,316 WARN L233 SmtUtils]: Spent 8.33s on a formula simplification. DAG size of input: 60 DAG size of output: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)