./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-divine/ring_2w1r-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f 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_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-divine/ring_2w1r-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8 --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 509c3c8c1895397e4c0d03f6462ad0ca0ed3ce99b40d08b775ab8473dba5ee1f --- 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-e04fb08 [2022-11-16 11:56:35,220 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:56:35,223 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:56:35,261 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:56:35,262 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:56:35,264 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:56:35,265 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:56:35,268 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:56:35,270 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:56:35,271 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:56:35,272 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:56:35,274 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:56:35,275 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:56:35,276 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:56:35,277 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:56:35,279 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:56:35,280 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:56:35,281 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:56:35,283 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:56:35,286 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:56:35,288 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:56:35,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:56:35,291 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:56:35,292 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:56:35,296 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:56:35,297 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:56:35,297 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:56:35,299 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:56:35,299 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:56:35,301 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:56:35,301 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:56:35,302 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:56:35,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:56:35,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:56:35,306 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:56:35,306 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:56:35,307 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:56:35,308 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:56:35,308 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:56:35,309 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:56:35,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:56:35,311 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 11:56:35,338 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:56:35,338 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:56:35,339 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:56:35,339 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:56:35,340 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:56:35,340 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:56:35,341 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:56:35,341 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:56:35,342 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:56:35,342 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:56:35,342 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:56:35,343 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:56:35,343 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:56:35,343 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:56:35,344 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:56:35,344 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 11:56:35,344 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 11:56:35,344 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 11:56:35,345 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:56:35,345 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 11:56:35,345 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:56:35,345 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:56:35,346 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:56:35,346 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:56:35,346 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:56:35,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:56:35,347 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:56:35,347 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:56:35,348 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:56:35,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:56:35,348 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_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 509c3c8c1895397e4c0d03f6462ad0ca0ed3ce99b40d08b775ab8473dba5ee1f [2022-11-16 11:56:35,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:56:35,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:56:35,672 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:56:35,673 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:56:35,674 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:56:35,676 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/pthread-divine/ring_2w1r-1.i [2022-11-16 11:56:35,779 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/data/e76c1ceb5/b908aa13f5574a908a1e05e38d942214/FLAG4197fe8f9 [2022-11-16 11:56:36,443 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:56:36,444 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i [2022-11-16 11:56:36,467 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/data/e76c1ceb5/b908aa13f5574a908a1e05e38d942214/FLAG4197fe8f9 [2022-11-16 11:56:36,692 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/data/e76c1ceb5/b908aa13f5574a908a1e05e38d942214 [2022-11-16 11:56:36,700 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:56:36,702 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:56:36,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:56:36,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:56:36,712 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:56:36,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:56:36" (1/1) ... [2022-11-16 11:56:36,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@301b376d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:36, skipping insertion in model container [2022-11-16 11:56:36,715 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:56:36" (1/1) ... [2022-11-16 11:56:36,727 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:56:36,807 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:56:37,056 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-16 11:56:37,471 WARN L229 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_99e10c6a-19b4-483b-95a0-69d4466eba58/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39095,39108] [2022-11-16 11:56:37,478 WARN L229 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_99e10c6a-19b4-483b-95a0-69d4466eba58/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39180,39193] [2022-11-16 11:56:37,479 WARN L229 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_99e10c6a-19b4-483b-95a0-69d4466eba58/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39232,39245] [2022-11-16 11:56:37,605 WARN L229 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_99e10c6a-19b4-483b-95a0-69d4466eba58/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49388,49401] [2022-11-16 11:56:37,607 WARN L229 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_99e10c6a-19b4-483b-95a0-69d4466eba58/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49437,49450] [2022-11-16 11:56:37,611 WARN L229 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_99e10c6a-19b4-483b-95a0-69d4466eba58/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49565,49578] [2022-11-16 11:56:37,614 WARN L229 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_99e10c6a-19b4-483b-95a0-69d4466eba58/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49623,49636] [2022-11-16 11:56:37,623 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:56:37,639 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:56:37,656 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-16 11:56:37,679 WARN L229 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_99e10c6a-19b4-483b-95a0-69d4466eba58/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39095,39108] [2022-11-16 11:56:37,681 WARN L229 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_99e10c6a-19b4-483b-95a0-69d4466eba58/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39180,39193] [2022-11-16 11:56:37,681 WARN L229 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_99e10c6a-19b4-483b-95a0-69d4466eba58/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39232,39245] [2022-11-16 11:56:37,693 WARN L229 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_99e10c6a-19b4-483b-95a0-69d4466eba58/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49388,49401] [2022-11-16 11:56:37,694 WARN L229 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_99e10c6a-19b4-483b-95a0-69d4466eba58/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49437,49450] [2022-11-16 11:56:37,695 WARN L229 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_99e10c6a-19b4-483b-95a0-69d4466eba58/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49565,49578] [2022-11-16 11:56:37,696 WARN L229 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_99e10c6a-19b4-483b-95a0-69d4466eba58/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49623,49636] [2022-11-16 11:56:37,703 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:56:37,799 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:56:37,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:37 WrapperNode [2022-11-16 11:56:37,800 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:56:37,801 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:56:37,802 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:56:37,802 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:56:37,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:37" (1/1) ... [2022-11-16 11:56:37,853 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:37" (1/1) ... [2022-11-16 11:56:37,922 INFO L138 Inliner]: procedures = 310, calls = 70, calls flagged for inlining = 10, calls inlined = 8, statements flattened = 203 [2022-11-16 11:56:37,924 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:56:37,925 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:56:37,925 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:56:37,926 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:56:37,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:37" (1/1) ... [2022-11-16 11:56:37,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:37" (1/1) ... [2022-11-16 11:56:37,955 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:37" (1/1) ... [2022-11-16 11:56:37,960 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:37" (1/1) ... [2022-11-16 11:56:37,975 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:37" (1/1) ... [2022-11-16 11:56:37,996 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:37" (1/1) ... [2022-11-16 11:56:37,999 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:37" (1/1) ... [2022-11-16 11:56:38,001 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:37" (1/1) ... [2022-11-16 11:56:38,004 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:56:38,012 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:56:38,012 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:56:38,012 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:56:38,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:37" (1/1) ... [2022-11-16 11:56:38,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:56:38,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:38,067 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:56:38,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:56:38,133 INFO L130 BoogieDeclarations]: Found specification of procedure reader_two [2022-11-16 11:56:38,134 INFO L138 BoogieDeclarations]: Found implementation of procedure reader_two [2022-11-16 11:56:38,134 INFO L130 BoogieDeclarations]: Found specification of procedure writer_fn [2022-11-16 11:56:38,134 INFO L138 BoogieDeclarations]: Found implementation of procedure writer_fn [2022-11-16 11:56:38,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:56:38,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:56:38,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:56:38,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:56:38,136 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-16 11:56:38,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:56:38,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:56:38,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:56:38,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:56:38,139 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 11:56:38,370 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:56:38,374 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:56:39,144 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:56:39,155 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:56:39,156 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-16 11:56:39,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:56:39 BoogieIcfgContainer [2022-11-16 11:56:39,159 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:56:39,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:56:39,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:56:39,166 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:56:39,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:56:36" (1/3) ... [2022-11-16 11:56:39,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a275eaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:56:39, skipping insertion in model container [2022-11-16 11:56:39,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:56:37" (2/3) ... [2022-11-16 11:56:39,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a275eaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:56:39, skipping insertion in model container [2022-11-16 11:56:39,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:56:39" (3/3) ... [2022-11-16 11:56:39,170 INFO L112 eAbstractionObserver]: Analyzing ICFG ring_2w1r-1.i [2022-11-16 11:56:39,194 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:56:39,194 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 61 error locations. [2022-11-16 11:56:39,195 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 11:56:39,438 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 11:56:39,536 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 11:56:39,563 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 283 places, 293 transitions, 602 flow [2022-11-16 11:56:39,566 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 283 places, 293 transitions, 602 flow [2022-11-16 11:56:39,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 283 places, 293 transitions, 602 flow [2022-11-16 11:56:39,784 INFO L130 PetriNetUnfolder]: 17/291 cut-off events. [2022-11-16 11:56:39,785 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 11:56:39,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 291 events. 17/291 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 825 event pairs, 0 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 227. Up to 2 conditions per place. [2022-11-16 11:56:39,821 INFO L119 LiptonReduction]: Number of co-enabled transitions 31324 [2022-11-16 11:56:55,958 INFO L134 LiptonReduction]: Checked pairs total: 108627 [2022-11-16 11:56:55,960 INFO L136 LiptonReduction]: Total number of compositions: 294 [2022-11-16 11:56:55,974 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 116 places, 119 transitions, 254 flow [2022-11-16 11:56:56,894 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 24038 states, 19081 states have (on average 4.065300560767255) internal successors, (77570), 24037 states have internal predecessors, (77570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:56,939 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:56:56,950 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;@340fa4c2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:56:56,951 INFO L358 AbstractCegarLoop]: Starting to check reachability of 99 error locations. [2022-11-16 11:56:57,007 INFO L276 IsEmpty]: Start isEmpty. Operand has 24038 states, 19081 states have (on average 4.065300560767255) internal successors, (77570), 24037 states have internal predecessors, (77570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:57,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-16 11:56:57,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:57,014 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-16 11:56:57,015 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 11:56:57,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:57,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1135, now seen corresponding path program 1 times [2022-11-16 11:56:57,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:57,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635607804] [2022-11-16 11:56:57,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:57,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:57,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:57,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:57,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:57,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635607804] [2022-11-16 11:56:57,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635607804] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:56:57,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:56:57,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-16 11:56:57,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454607607] [2022-11-16 11:56:57,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:56:57,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:56:57,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:57,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:56:57,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:56:57,264 INFO L87 Difference]: Start difference. First operand has 24038 states, 19081 states have (on average 4.065300560767255) internal successors, (77570), 24037 states have internal predecessors, (77570), 0 states have call successors, (0), 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 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:57,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:57,822 INFO L93 Difference]: Finished difference Result 19244 states and 60216 transitions. [2022-11-16 11:56:57,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:56:57,825 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 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 1 [2022-11-16 11:56:57,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:58,168 INFO L225 Difference]: With dead ends: 19244 [2022-11-16 11:56:58,168 INFO L226 Difference]: Without dead ends: 19244 [2022-11-16 11:56:58,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:56:58,173 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:58,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:56:58,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19244 states. [2022-11-16 11:56:59,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19244 to 19244. [2022-11-16 11:56:59,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19244 states, 16066 states have (on average 3.748039337731856) internal successors, (60216), 19243 states have internal predecessors, (60216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:59,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19244 states to 19244 states and 60216 transitions. [2022-11-16 11:56:59,353 INFO L78 Accepts]: Start accepts. Automaton has 19244 states and 60216 transitions. Word has length 1 [2022-11-16 11:56:59,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:59,354 INFO L495 AbstractCegarLoop]: Abstraction has 19244 states and 60216 transitions. [2022-11-16 11:56:59,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:59,356 INFO L276 IsEmpty]: Start isEmpty. Operand 19244 states and 60216 transitions. [2022-11-16 11:56:59,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 11:56:59,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:59,357 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 11:56:59,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:56:59,358 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 11:56:59,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:59,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1123942, now seen corresponding path program 1 times [2022-11-16 11:56:59,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:59,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417957759] [2022-11-16 11:56:59,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:59,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:59,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:59,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:59,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417957759] [2022-11-16 11:56:59,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417957759] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:56:59,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:56:59,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 11:56:59,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170548662] [2022-11-16 11:56:59,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:56:59,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:56:59,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:59,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:56:59,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:56:59,928 INFO L87 Difference]: Start difference. First operand 19244 states and 60216 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) [2022-11-16 11:57:00,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:00,567 INFO L93 Difference]: Finished difference Result 19782 states and 61358 transitions. [2022-11-16 11:57:00,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:57:00,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 11:57:00,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:00,761 INFO L225 Difference]: With dead ends: 19782 [2022-11-16 11:57:00,761 INFO L226 Difference]: Without dead ends: 19782 [2022-11-16 11:57:00,762 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 [2022-11-16 11:57:00,765 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 90 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:00,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 33 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:57:00,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19782 states. [2022-11-16 11:57:02,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19782 to 19452. [2022-11-16 11:57:02,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19452 states, 16289 states have (on average 3.7456565780588127) internal successors, (61013), 19451 states have internal predecessors, (61013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:02,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19452 states to 19452 states and 61013 transitions. [2022-11-16 11:57:02,246 INFO L78 Accepts]: Start accepts. Automaton has 19452 states and 61013 transitions. Word has length 3 [2022-11-16 11:57:02,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:02,247 INFO L495 AbstractCegarLoop]: Abstraction has 19452 states and 61013 transitions. [2022-11-16 11:57:02,247 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) [2022-11-16 11:57:02,247 INFO L276 IsEmpty]: Start isEmpty. Operand 19452 states and 61013 transitions. [2022-11-16 11:57:02,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 11:57:02,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:02,248 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 11:57:02,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:57:02,249 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 11:57:02,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:02,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1123943, now seen corresponding path program 1 times [2022-11-16 11:57:02,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:02,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181667215] [2022-11-16 11:57:02,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:02,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:02,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:02,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:02,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:02,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181667215] [2022-11-16 11:57:02,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181667215] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:02,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:02,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:57:02,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027542677] [2022-11-16 11:57:02,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:02,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:57:02,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:02,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:57:02,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:57:02,455 INFO L87 Difference]: Start difference. First operand 19452 states and 61013 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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) [2022-11-16 11:57:03,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:03,265 INFO L93 Difference]: Finished difference Result 19451 states and 61011 transitions. [2022-11-16 11:57:03,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:57:03,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 11:57:03,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:03,410 INFO L225 Difference]: With dead ends: 19451 [2022-11-16 11:57:03,411 INFO L226 Difference]: Without dead ends: 19451 [2022-11-16 11:57:03,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:57:03,412 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 51 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:03,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 63 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:57:03,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19451 states. [2022-11-16 11:57:04,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19451 to 19451. [2022-11-16 11:57:04,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19451 states, 16288 states have (on average 3.7457637524557956) internal successors, (61011), 19450 states have internal predecessors, (61011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:04,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19451 states to 19451 states and 61011 transitions. [2022-11-16 11:57:04,547 INFO L78 Accepts]: Start accepts. Automaton has 19451 states and 61011 transitions. Word has length 3 [2022-11-16 11:57:04,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:04,563 INFO L495 AbstractCegarLoop]: Abstraction has 19451 states and 61011 transitions. [2022-11-16 11:57:04,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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) [2022-11-16 11:57:04,564 INFO L276 IsEmpty]: Start isEmpty. Operand 19451 states and 61011 transitions. [2022-11-16 11:57:04,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 11:57:04,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:04,565 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 11:57:04,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:57:04,566 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 11:57:04,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:04,566 INFO L85 PathProgramCache]: Analyzing trace with hash 34842953, now seen corresponding path program 1 times [2022-11-16 11:57:04,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:04,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375600254] [2022-11-16 11:57:04,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:04,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:04,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:04,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:04,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:04,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375600254] [2022-11-16 11:57:04,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375600254] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:04,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:04,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:57:04,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791869745] [2022-11-16 11:57:04,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:04,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:57:04,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:04,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:57:04,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:57:04,868 INFO L87 Difference]: Start difference. First operand 19451 states and 61011 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:05,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:05,384 INFO L93 Difference]: Finished difference Result 19394 states and 60872 transitions. [2022-11-16 11:57:05,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:57:05,384 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-11-16 11:57:05,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:05,499 INFO L225 Difference]: With dead ends: 19394 [2022-11-16 11:57:05,500 INFO L226 Difference]: Without dead ends: 19394 [2022-11-16 11:57:05,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:57:05,501 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 143 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:05,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 63 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:57:05,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19394 states. [2022-11-16 11:57:06,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19394 to 19394. [2022-11-16 11:57:06,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19394 states, 16260 states have (on average 3.7436654366543665) internal successors, (60872), 19393 states have internal predecessors, (60872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:06,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19394 states to 19394 states and 60872 transitions. [2022-11-16 11:57:06,467 INFO L78 Accepts]: Start accepts. Automaton has 19394 states and 60872 transitions. Word has length 4 [2022-11-16 11:57:06,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:06,468 INFO L495 AbstractCegarLoop]: Abstraction has 19394 states and 60872 transitions. [2022-11-16 11:57:06,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:06,468 INFO L276 IsEmpty]: Start isEmpty. Operand 19394 states and 60872 transitions. [2022-11-16 11:57:06,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 11:57:06,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:06,469 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 11:57:06,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:57:06,470 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 11:57:06,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:06,471 INFO L85 PathProgramCache]: Analyzing trace with hash -875586760, now seen corresponding path program 1 times [2022-11-16 11:57:06,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:06,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542588904] [2022-11-16 11:57:06,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:06,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:06,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:06,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:06,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:06,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542588904] [2022-11-16 11:57:06,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542588904] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:06,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:06,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:57:06,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575981321] [2022-11-16 11:57:06,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:06,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:57:06,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:06,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:57:06,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:57:06,566 INFO L87 Difference]: Start difference. First operand 19394 states and 60872 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:07,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:07,320 INFO L93 Difference]: Finished difference Result 35410 states and 111430 transitions. [2022-11-16 11:57:07,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:57:07,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 11:57:07,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:07,498 INFO L225 Difference]: With dead ends: 35410 [2022-11-16 11:57:07,498 INFO L226 Difference]: Without dead ends: 35410 [2022-11-16 11:57:07,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:57:07,500 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 81 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:07,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 102 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:57:07,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35410 states. [2022-11-16 11:57:08,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35410 to 20208. [2022-11-16 11:57:08,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20208 states, 17074 states have (on average 3.7116668618952793) internal successors, (63373), 20207 states have internal predecessors, (63373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:08,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20208 states to 20208 states and 63373 transitions. [2022-11-16 11:57:08,494 INFO L78 Accepts]: Start accepts. Automaton has 20208 states and 63373 transitions. Word has length 6 [2022-11-16 11:57:08,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:08,495 INFO L495 AbstractCegarLoop]: Abstraction has 20208 states and 63373 transitions. [2022-11-16 11:57:08,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:08,496 INFO L276 IsEmpty]: Start isEmpty. Operand 20208 states and 63373 transitions. [2022-11-16 11:57:08,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:57:08,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:08,497 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:08,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:57:08,497 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 11:57:08,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:08,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1373384667, now seen corresponding path program 1 times [2022-11-16 11:57:08,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:08,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831533504] [2022-11-16 11:57:08,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:08,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:08,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:08,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:08,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:08,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831533504] [2022-11-16 11:57:08,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831533504] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:08,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:08,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:57:08,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931226535] [2022-11-16 11:57:08,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:08,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:57:08,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:08,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:57:08,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:57:08,928 INFO L87 Difference]: Start difference. First operand 20208 states and 63373 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2022-11-16 11:57:09,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:09,608 INFO L93 Difference]: Finished difference Result 16051 states and 49788 transitions. [2022-11-16 11:57:09,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:57:09,609 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 11:57:09,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:09,664 INFO L225 Difference]: With dead ends: 16051 [2022-11-16 11:57:09,665 INFO L226 Difference]: Without dead ends: 16051 [2022-11-16 11:57:09,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:57:09,665 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 268 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:09,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 126 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:57:09,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16051 states. [2022-11-16 11:57:10,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16051 to 15742. [2022-11-16 11:57:10,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15742 states, 13778 states have (on average 3.577297140368704) internal successors, (49288), 15741 states have internal predecessors, (49288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:10,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15742 states to 15742 states and 49288 transitions. [2022-11-16 11:57:10,398 INFO L78 Accepts]: Start accepts. Automaton has 15742 states and 49288 transitions. Word has length 7 [2022-11-16 11:57:10,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:10,399 INFO L495 AbstractCegarLoop]: Abstraction has 15742 states and 49288 transitions. [2022-11-16 11:57:10,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2022-11-16 11:57:10,400 INFO L276 IsEmpty]: Start isEmpty. Operand 15742 states and 49288 transitions. [2022-11-16 11:57:10,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:57:10,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:10,401 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:10,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 11:57:10,402 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 11:57:10,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:10,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1373384666, now seen corresponding path program 1 times [2022-11-16 11:57:10,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:10,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496033844] [2022-11-16 11:57:10,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:10,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:10,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:10,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:10,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496033844] [2022-11-16 11:57:10,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496033844] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:10,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:10,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:57:10,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732963364] [2022-11-16 11:57:10,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:10,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:57:10,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:10,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:57:10,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:57:10,632 INFO L87 Difference]: Start difference. First operand 15742 states and 49288 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2022-11-16 11:57:11,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:11,212 INFO L93 Difference]: Finished difference Result 15632 states and 48953 transitions. [2022-11-16 11:57:11,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:57:11,212 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 11:57:11,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:11,276 INFO L225 Difference]: With dead ends: 15632 [2022-11-16 11:57:11,276 INFO L226 Difference]: Without dead ends: 15632 [2022-11-16 11:57:11,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:57:11,277 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 108 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:11,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 101 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:57:11,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15632 states. [2022-11-16 11:57:11,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15632 to 15632. [2022-11-16 11:57:11,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15632 states, 13668 states have (on average 3.5815774070822357) internal successors, (48953), 15631 states have internal predecessors, (48953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:11,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15632 states to 15632 states and 48953 transitions. [2022-11-16 11:57:12,007 INFO L78 Accepts]: Start accepts. Automaton has 15632 states and 48953 transitions. Word has length 7 [2022-11-16 11:57:12,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:12,008 INFO L495 AbstractCegarLoop]: Abstraction has 15632 states and 48953 transitions. [2022-11-16 11:57:12,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2022-11-16 11:57:12,018 INFO L276 IsEmpty]: Start isEmpty. Operand 15632 states and 48953 transitions. [2022-11-16 11:57:12,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:57:12,020 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:12,020 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:12,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 11:57:12,022 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting writer_fnErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 11:57:12,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:12,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1373487387, now seen corresponding path program 1 times [2022-11-16 11:57:12,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:12,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632578336] [2022-11-16 11:57:12,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:12,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:12,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:12,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:12,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632578336] [2022-11-16 11:57:12,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632578336] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:12,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:12,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:57:12,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316910004] [2022-11-16 11:57:12,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:12,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:57:12,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:12,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:57:12,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:57:12,160 INFO L87 Difference]: Start difference. First operand 15632 states and 48953 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:12,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:12,888 INFO L93 Difference]: Finished difference Result 13490 states and 41803 transitions. [2022-11-16 11:57:12,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:57:12,888 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 11:57:12,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:12,935 INFO L225 Difference]: With dead ends: 13490 [2022-11-16 11:57:12,935 INFO L226 Difference]: Without dead ends: 13490 [2022-11-16 11:57:12,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:57:12,936 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 323 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:12,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 186 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 11:57:12,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13490 states. [2022-11-16 11:57:13,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13490 to 11824. [2022-11-16 11:57:13,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11824 states, 10670 states have (on average 3.4747891283973757) internal successors, (37076), 11823 states have internal predecessors, (37076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:13,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11824 states to 11824 states and 37076 transitions. [2022-11-16 11:57:13,231 INFO L78 Accepts]: Start accepts. Automaton has 11824 states and 37076 transitions. Word has length 7 [2022-11-16 11:57:13,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:13,231 INFO L495 AbstractCegarLoop]: Abstraction has 11824 states and 37076 transitions. [2022-11-16 11:57:13,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:13,232 INFO L276 IsEmpty]: Start isEmpty. Operand 11824 states and 37076 transitions. [2022-11-16 11:57:13,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:57:13,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:13,232 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:13,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 11:57:13,233 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting writer_fnErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 11:57:13,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:13,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1373487386, now seen corresponding path program 1 times [2022-11-16 11:57:13,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:13,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903376896] [2022-11-16 11:57:13,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:13,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:13,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:13,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:13,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:13,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903376896] [2022-11-16 11:57:13,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903376896] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:13,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:13,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:57:13,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477928471] [2022-11-16 11:57:13,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:13,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:57:13,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:13,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:57:13,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:57:13,463 INFO L87 Difference]: Start difference. First operand 11824 states and 37076 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:14,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:14,056 INFO L93 Difference]: Finished difference Result 11782 states and 36947 transitions. [2022-11-16 11:57:14,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:57:14,057 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-16 11:57:14,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:14,111 INFO L225 Difference]: With dead ends: 11782 [2022-11-16 11:57:14,116 INFO L226 Difference]: Without dead ends: 11782 [2022-11-16 11:57:14,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:57:14,118 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 102 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:14,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 109 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:57:14,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11782 states. [2022-11-16 11:57:14,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11782 to 11754. [2022-11-16 11:57:14,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11754 states, 10600 states have (on average 3.477452830188679) internal successors, (36861), 11753 states have internal predecessors, (36861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:14,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11754 states to 11754 states and 36861 transitions. [2022-11-16 11:57:14,678 INFO L78 Accepts]: Start accepts. Automaton has 11754 states and 36861 transitions. Word has length 7 [2022-11-16 11:57:14,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:14,678 INFO L495 AbstractCegarLoop]: Abstraction has 11754 states and 36861 transitions. [2022-11-16 11:57:14,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:14,679 INFO L276 IsEmpty]: Start isEmpty. Operand 11754 states and 36861 transitions. [2022-11-16 11:57:14,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:57:14,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:14,679 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:14,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 11:57:14,680 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 11:57:14,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:14,680 INFO L85 PathProgramCache]: Analyzing trace with hash 374719424, now seen corresponding path program 1 times [2022-11-16 11:57:14,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:14,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568649693] [2022-11-16 11:57:14,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:14,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:14,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:14,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:14,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:14,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568649693] [2022-11-16 11:57:14,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568649693] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:14,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:14,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:57:14,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52744658] [2022-11-16 11:57:14,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:14,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:57:14,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:14,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:57:14,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:57:14,872 INFO L87 Difference]: Start difference. First operand 11754 states and 36861 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2022-11-16 11:57:15,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:15,747 INFO L93 Difference]: Finished difference Result 19686 states and 61317 transitions. [2022-11-16 11:57:15,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:57:15,747 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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 8 [2022-11-16 11:57:15,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:15,815 INFO L225 Difference]: With dead ends: 19686 [2022-11-16 11:57:15,815 INFO L226 Difference]: Without dead ends: 19686 [2022-11-16 11:57:15,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:57:15,815 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 438 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:15,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 91 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:57:15,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19686 states. [2022-11-16 11:57:16,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19686 to 15634. [2022-11-16 11:57:16,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15634 states, 14480 states have (on average 3.4707872928176795) internal successors, (50257), 15633 states have internal predecessors, (50257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:16,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15634 states to 15634 states and 50257 transitions. [2022-11-16 11:57:16,298 INFO L78 Accepts]: Start accepts. Automaton has 15634 states and 50257 transitions. Word has length 8 [2022-11-16 11:57:16,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:16,298 INFO L495 AbstractCegarLoop]: Abstraction has 15634 states and 50257 transitions. [2022-11-16 11:57:16,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2022-11-16 11:57:16,299 INFO L276 IsEmpty]: Start isEmpty. Operand 15634 states and 50257 transitions. [2022-11-16 11:57:16,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:57:16,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:16,300 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:16,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 11:57:16,300 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 11:57:16,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:16,301 INFO L85 PathProgramCache]: Analyzing trace with hash 374765924, now seen corresponding path program 2 times [2022-11-16 11:57:16,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:16,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127333338] [2022-11-16 11:57:16,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:16,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:16,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:16,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:16,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:16,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127333338] [2022-11-16 11:57:16,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127333338] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:16,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:16,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:57:16,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473588738] [2022-11-16 11:57:16,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:16,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:57:16,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:16,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:57:16,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:57:16,569 INFO L87 Difference]: Start difference. First operand 15634 states and 50257 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2022-11-16 11:57:17,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:17,470 INFO L93 Difference]: Finished difference Result 13645 states and 43075 transitions. [2022-11-16 11:57:17,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:57:17,471 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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 8 [2022-11-16 11:57:17,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:17,523 INFO L225 Difference]: With dead ends: 13645 [2022-11-16 11:57:17,524 INFO L226 Difference]: Without dead ends: 13645 [2022-11-16 11:57:17,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:57:17,525 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 342 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:17,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 77 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:57:17,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13645 states. [2022-11-16 11:57:17,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13645 to 9314. [2022-11-16 11:57:17,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9314 states, 8685 states have (on average 3.3375935521013242) internal successors, (28987), 9313 states have internal predecessors, (28987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:17,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9314 states to 9314 states and 28987 transitions. [2022-11-16 11:57:17,974 INFO L78 Accepts]: Start accepts. Automaton has 9314 states and 28987 transitions. Word has length 8 [2022-11-16 11:57:17,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:17,974 INFO L495 AbstractCegarLoop]: Abstraction has 9314 states and 28987 transitions. [2022-11-16 11:57:17,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2022-11-16 11:57:17,975 INFO L276 IsEmpty]: Start isEmpty. Operand 9314 states and 28987 transitions. [2022-11-16 11:57:17,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 11:57:17,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:17,976 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:17,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 11:57:17,977 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting writer_fnErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 11:57:17,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:17,977 INFO L85 PathProgramCache]: Analyzing trace with hash 371571884, now seen corresponding path program 1 times [2022-11-16 11:57:17,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:17,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948397955] [2022-11-16 11:57:17,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:17,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:18,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:18,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:18,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948397955] [2022-11-16 11:57:18,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948397955] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:18,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:18,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:57:18,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626973586] [2022-11-16 11:57:18,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:18,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:57:18,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:18,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:57:18,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:57:18,291 INFO L87 Difference]: Start difference. First operand 9314 states and 28987 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 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) [2022-11-16 11:57:19,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:19,636 INFO L93 Difference]: Finished difference Result 8621 states and 25957 transitions. [2022-11-16 11:57:19,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:57:19,637 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 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 8 [2022-11-16 11:57:19,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:19,668 INFO L225 Difference]: With dead ends: 8621 [2022-11-16 11:57:19,668 INFO L226 Difference]: Without dead ends: 8621 [2022-11-16 11:57:19,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:57:19,670 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 318 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:19,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 145 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-16 11:57:19,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8621 states. [2022-11-16 11:57:19,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8621 to 7242. [2022-11-16 11:57:19,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7242 states, 6913 states have (on average 3.1981773470273396) internal successors, (22109), 7241 states have internal predecessors, (22109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:19,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7242 states to 7242 states and 22109 transitions. [2022-11-16 11:57:19,914 INFO L78 Accepts]: Start accepts. Automaton has 7242 states and 22109 transitions. Word has length 8 [2022-11-16 11:57:19,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:19,914 INFO L495 AbstractCegarLoop]: Abstraction has 7242 states and 22109 transitions. [2022-11-16 11:57:19,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 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) [2022-11-16 11:57:19,915 INFO L276 IsEmpty]: Start isEmpty. Operand 7242 states and 22109 transitions. [2022-11-16 11:57:19,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:57:19,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:19,917 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:19,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 11:57:19,917 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 11:57:19,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:19,918 INFO L85 PathProgramCache]: Analyzing trace with hash -643149953, now seen corresponding path program 1 times [2022-11-16 11:57:19,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:19,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054521062] [2022-11-16 11:57:19,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:19,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:19,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:20,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:20,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:20,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054521062] [2022-11-16 11:57:20,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054521062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:20,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:20,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:57:20,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985655215] [2022-11-16 11:57:20,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:20,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:57:20,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:20,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:57:20,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:57:20,577 INFO L87 Difference]: Start difference. First operand 7242 states and 22109 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 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) [2022-11-16 11:57:22,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:22,588 INFO L93 Difference]: Finished difference Result 10112 states and 31095 transitions. [2022-11-16 11:57:22,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:57:22,589 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 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 10 [2022-11-16 11:57:22,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:22,617 INFO L225 Difference]: With dead ends: 10112 [2022-11-16 11:57:22,617 INFO L226 Difference]: Without dead ends: 10112 [2022-11-16 11:57:22,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:57:22,618 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 384 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 1372 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 1381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:22,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 229 Invalid, 1381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1372 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-16 11:57:22,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10112 states. [2022-11-16 11:57:22,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10112 to 9065. [2022-11-16 11:57:22,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9065 states, 8736 states have (on average 3.2109661172161172) internal successors, (28051), 9064 states have internal predecessors, (28051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:22,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9065 states to 9065 states and 28051 transitions. [2022-11-16 11:57:22,800 INFO L78 Accepts]: Start accepts. Automaton has 9065 states and 28051 transitions. Word has length 10 [2022-11-16 11:57:22,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:22,800 INFO L495 AbstractCegarLoop]: Abstraction has 9065 states and 28051 transitions. [2022-11-16 11:57:22,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 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) [2022-11-16 11:57:22,800 INFO L276 IsEmpty]: Start isEmpty. Operand 9065 states and 28051 transitions. [2022-11-16 11:57:22,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 11:57:22,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:22,801 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:22,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 11:57:22,802 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting writer_fnErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 11:57:22,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:22,802 INFO L85 PathProgramCache]: Analyzing trace with hash 591629826, now seen corresponding path program 1 times [2022-11-16 11:57:22,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:22,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502519013] [2022-11-16 11:57:22,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:22,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:22,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:23,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:23,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:23,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502519013] [2022-11-16 11:57:23,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502519013] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:23,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:23,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 11:57:23,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214055209] [2022-11-16 11:57:23,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:23,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:57:23,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:23,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:57:23,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:57:23,469 INFO L87 Difference]: Start difference. First operand 9065 states and 28051 transitions. Second operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 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) [2022-11-16 11:57:25,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:25,647 INFO L93 Difference]: Finished difference Result 10859 states and 33410 transitions. [2022-11-16 11:57:25,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:57:25,648 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 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 10 [2022-11-16 11:57:25,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:25,680 INFO L225 Difference]: With dead ends: 10859 [2022-11-16 11:57:25,680 INFO L226 Difference]: Without dead ends: 10859 [2022-11-16 11:57:25,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:57:25,681 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 436 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 1748 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 1756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:25,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 251 Invalid, 1756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1748 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-16 11:57:25,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10859 states. [2022-11-16 11:57:25,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10859 to 10216. [2022-11-16 11:57:25,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 9887 states have (on average 3.209163548093456) internal successors, (31729), 10215 states have internal predecessors, (31729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:26,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 31729 transitions. [2022-11-16 11:57:26,015 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 31729 transitions. Word has length 10 [2022-11-16 11:57:26,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:26,015 INFO L495 AbstractCegarLoop]: Abstraction has 10216 states and 31729 transitions. [2022-11-16 11:57:26,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 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) [2022-11-16 11:57:26,015 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 31729 transitions. [2022-11-16 11:57:26,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:57:26,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:26,017 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:26,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 11:57:26,017 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 11:57:26,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:26,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1537206387, now seen corresponding path program 1 times [2022-11-16 11:57:26,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:26,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418291072] [2022-11-16 11:57:26,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:26,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:26,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:26,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:26,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:26,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418291072] [2022-11-16 11:57:26,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418291072] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:26,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:26,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 11:57:26,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537984862] [2022-11-16 11:57:26,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:26,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:57:26,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:26,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:57:26,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:57:26,728 INFO L87 Difference]: Start difference. First operand 10216 states and 31729 transitions. Second operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:28,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:28,488 INFO L93 Difference]: Finished difference Result 12746 states and 39699 transitions. [2022-11-16 11:57:28,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:57:28,489 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 11:57:28,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:28,532 INFO L225 Difference]: With dead ends: 12746 [2022-11-16 11:57:28,532 INFO L226 Difference]: Without dead ends: 12746 [2022-11-16 11:57:28,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:57:28,533 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 352 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 1435 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:28,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 144 Invalid, 1457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1435 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-16 11:57:28,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12746 states. [2022-11-16 11:57:28,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12746 to 9970. [2022-11-16 11:57:28,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9970 states, 9641 states have (on average 3.198319676382118) internal successors, (30835), 9969 states have internal predecessors, (30835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:28,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9970 states to 9970 states and 30835 transitions. [2022-11-16 11:57:28,750 INFO L78 Accepts]: Start accepts. Automaton has 9970 states and 30835 transitions. Word has length 11 [2022-11-16 11:57:28,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:28,751 INFO L495 AbstractCegarLoop]: Abstraction has 9970 states and 30835 transitions. [2022-11-16 11:57:28,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:28,751 INFO L276 IsEmpty]: Start isEmpty. Operand 9970 states and 30835 transitions. [2022-11-16 11:57:28,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:57:28,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:28,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:28,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 11:57:28,752 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting writer_fnErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 11:57:28,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:28,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1160663042, now seen corresponding path program 1 times [2022-11-16 11:57:28,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:28,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385542791] [2022-11-16 11:57:28,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:28,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:29,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:29,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:29,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385542791] [2022-11-16 11:57:29,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385542791] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:29,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:29,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-16 11:57:29,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076855039] [2022-11-16 11:57:29,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:29,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 11:57:29,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:29,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 11:57:29,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:57:29,534 INFO L87 Difference]: Start difference. First operand 9970 states and 30835 transitions. Second operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:31,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:31,392 INFO L93 Difference]: Finished difference Result 12321 states and 38156 transitions. [2022-11-16 11:57:31,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 11:57:31,393 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 11:57:31,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:31,434 INFO L225 Difference]: With dead ends: 12321 [2022-11-16 11:57:31,434 INFO L226 Difference]: Without dead ends: 12321 [2022-11-16 11:57:31,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2022-11-16 11:57:31,435 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 455 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:31,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 136 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1483 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-16 11:57:31,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12321 states. [2022-11-16 11:57:31,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12321 to 9722. [2022-11-16 11:57:31,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9722 states, 9393 states have (on average 3.191951453209837) internal successors, (29982), 9721 states have internal predecessors, (29982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:31,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9722 states to 9722 states and 29982 transitions. [2022-11-16 11:57:31,655 INFO L78 Accepts]: Start accepts. Automaton has 9722 states and 29982 transitions. Word has length 11 [2022-11-16 11:57:31,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:31,655 INFO L495 AbstractCegarLoop]: Abstraction has 9722 states and 29982 transitions. [2022-11-16 11:57:31,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:31,656 INFO L276 IsEmpty]: Start isEmpty. Operand 9722 states and 29982 transitions. [2022-11-16 11:57:31,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:57:31,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:31,657 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:31,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-16 11:57:31,658 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 11:57:31,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:31,660 INFO L85 PathProgramCache]: Analyzing trace with hash -812060561, now seen corresponding path program 1 times [2022-11-16 11:57:31,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:31,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809484475] [2022-11-16 11:57:31,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:31,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:31,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:31,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:31,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:31,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809484475] [2022-11-16 11:57:31,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809484475] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:31,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:31,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:57:31,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532303024] [2022-11-16 11:57:31,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:31,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:57:31,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:31,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:57:31,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:57:31,839 INFO L87 Difference]: Start difference. First operand 9722 states and 29982 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-16 11:57:32,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:32,299 INFO L93 Difference]: Finished difference Result 9050 states and 27855 transitions. [2022-11-16 11:57:32,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:57:32,299 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 11:57:32,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:32,325 INFO L225 Difference]: With dead ends: 9050 [2022-11-16 11:57:32,325 INFO L226 Difference]: Without dead ends: 9050 [2022-11-16 11:57:32,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:57:32,326 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 232 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:32,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 21 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:57:32,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9050 states. [2022-11-16 11:57:32,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9050 to 9050. [2022-11-16 11:57:32,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9050 states, 8745 states have (on average 3.1852487135506005) internal successors, (27855), 9049 states have internal predecessors, (27855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:32,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9050 states to 9050 states and 27855 transitions. [2022-11-16 11:57:32,495 INFO L78 Accepts]: Start accepts. Automaton has 9050 states and 27855 transitions. Word has length 13 [2022-11-16 11:57:32,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:32,495 INFO L495 AbstractCegarLoop]: Abstraction has 9050 states and 27855 transitions. [2022-11-16 11:57:32,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-16 11:57:32,496 INFO L276 IsEmpty]: Start isEmpty. Operand 9050 states and 27855 transitions. [2022-11-16 11:57:32,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:57:32,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:32,497 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:32,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 11:57:32,498 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 11:57:32,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:32,499 INFO L85 PathProgramCache]: Analyzing trace with hash -812060560, now seen corresponding path program 1 times [2022-11-16 11:57:32,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:32,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201640901] [2022-11-16 11:57:32,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:32,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:32,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:32,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:32,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:32,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201640901] [2022-11-16 11:57:32,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201640901] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:32,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:32,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:57:32,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320004256] [2022-11-16 11:57:32,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:32,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:57:32,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:32,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:57:32,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:57:32,598 INFO L87 Difference]: Start difference. First operand 9050 states and 27855 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-16 11:57:32,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:32,936 INFO L93 Difference]: Finished difference Result 8602 states and 26437 transitions. [2022-11-16 11:57:32,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:57:32,937 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 11:57:32,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:32,961 INFO L225 Difference]: With dead ends: 8602 [2022-11-16 11:57:32,961 INFO L226 Difference]: Without dead ends: 8602 [2022-11-16 11:57:32,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:57:32,962 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 169 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:32,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 71 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:57:32,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8602 states. [2022-11-16 11:57:33,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8602 to 8602. [2022-11-16 11:57:33,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8602 states, 8313 states have (on average 3.180199687236858) internal successors, (26437), 8601 states have internal predecessors, (26437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:33,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8602 states to 8602 states and 26437 transitions. [2022-11-16 11:57:33,135 INFO L78 Accepts]: Start accepts. Automaton has 8602 states and 26437 transitions. Word has length 13 [2022-11-16 11:57:33,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:33,135 INFO L495 AbstractCegarLoop]: Abstraction has 8602 states and 26437 transitions. [2022-11-16 11:57:33,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2022-11-16 11:57:33,136 INFO L276 IsEmpty]: Start isEmpty. Operand 8602 states and 26437 transitions. [2022-11-16 11:57:33,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:57:33,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:33,137 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:33,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-16 11:57:33,137 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 11:57:33,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:33,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1840336517, now seen corresponding path program 1 times [2022-11-16 11:57:33,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:33,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329299697] [2022-11-16 11:57:33,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:33,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:33,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:33,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:33,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329299697] [2022-11-16 11:57:33,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329299697] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:57:33,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068751125] [2022-11-16 11:57:33,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:33,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:33,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:33,230 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:33,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:57:33,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:33,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:57:33,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:33,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:33,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:33,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068751125] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:33,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:57:33,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-16 11:57:33,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251479753] [2022-11-16 11:57:33,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:33,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:57:33,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:33,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:57:33,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:57:33,509 INFO L87 Difference]: Start difference. First operand 8602 states and 26437 transitions. Second operand has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:34,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:34,119 INFO L93 Difference]: Finished difference Result 22644 states and 69167 transitions. [2022-11-16 11:57:34,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:57:34,120 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 11:57:34,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:34,192 INFO L225 Difference]: With dead ends: 22644 [2022-11-16 11:57:34,192 INFO L226 Difference]: Without dead ends: 22644 [2022-11-16 11:57:34,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:57:34,193 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 373 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:34,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 288 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:57:34,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22644 states. [2022-11-16 11:57:34,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22644 to 20250. [2022-11-16 11:57:34,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20250 states, 19961 states have (on average 3.2676218626321325) internal successors, (65225), 20249 states have internal predecessors, (65225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:34,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20250 states to 20250 states and 65225 transitions. [2022-11-16 11:57:34,728 INFO L78 Accepts]: Start accepts. Automaton has 20250 states and 65225 transitions. Word has length 14 [2022-11-16 11:57:34,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:34,729 INFO L495 AbstractCegarLoop]: Abstraction has 20250 states and 65225 transitions. [2022-11-16 11:57:34,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:34,729 INFO L276 IsEmpty]: Start isEmpty. Operand 20250 states and 65225 transitions. [2022-11-16 11:57:34,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:57:34,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:34,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:34,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:57:34,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:34,931 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 11:57:34,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:34,931 INFO L85 PathProgramCache]: Analyzing trace with hash 595926515, now seen corresponding path program 1 times [2022-11-16 11:57:34,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:34,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321321855] [2022-11-16 11:57:34,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:34,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:34,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:34,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:34,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:34,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321321855] [2022-11-16 11:57:34,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321321855] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:34,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:34,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:57:34,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720890718] [2022-11-16 11:57:34,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:34,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:57:34,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:34,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:57:34,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:57:34,986 INFO L87 Difference]: Start difference. First operand 20250 states and 65225 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2022-11-16 11:57:35,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:35,343 INFO L93 Difference]: Finished difference Result 29288 states and 96002 transitions. [2022-11-16 11:57:35,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:57:35,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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 14 [2022-11-16 11:57:35,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:35,448 INFO L225 Difference]: With dead ends: 29288 [2022-11-16 11:57:35,448 INFO L226 Difference]: Without dead ends: 29288 [2022-11-16 11:57:35,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:57:35,449 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 49 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:35,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 78 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:57:35,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29288 states. [2022-11-16 11:57:35,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29288 to 20918. [2022-11-16 11:57:35,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20918 states, 20629 states have (on average 3.311648649958796) internal successors, (68316), 20917 states have internal predecessors, (68316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:36,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20918 states to 20918 states and 68316 transitions. [2022-11-16 11:57:36,043 INFO L78 Accepts]: Start accepts. Automaton has 20918 states and 68316 transitions. Word has length 14 [2022-11-16 11:57:36,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:36,043 INFO L495 AbstractCegarLoop]: Abstraction has 20918 states and 68316 transitions. [2022-11-16 11:57:36,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) [2022-11-16 11:57:36,044 INFO L276 IsEmpty]: Start isEmpty. Operand 20918 states and 68316 transitions. [2022-11-16 11:57:36,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:57:36,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:36,046 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:36,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-16 11:57:36,046 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting reader_twoErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 11:57:36,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:36,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1293901999, now seen corresponding path program 1 times [2022-11-16 11:57:36,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:36,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341775775] [2022-11-16 11:57:36,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:36,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:36,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:36,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:36,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:36,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341775775] [2022-11-16 11:57:36,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341775775] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:36,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:36,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:57:36,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946756902] [2022-11-16 11:57:36,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:36,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:57:36,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:36,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:57:36,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:57:36,652 INFO L87 Difference]: Start difference. First operand 20918 states and 68316 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:37,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:37,387 INFO L93 Difference]: Finished difference Result 20918 states and 68316 transitions. [2022-11-16 11:57:37,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:57:37,388 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 11:57:37,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:37,511 INFO L225 Difference]: With dead ends: 20918 [2022-11-16 11:57:37,511 INFO L226 Difference]: Without dead ends: 20918 [2022-11-16 11:57:37,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:57:37,514 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 52 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:37,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 120 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:57:37,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20918 states. [2022-11-16 11:57:38,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20918 to 20917. [2022-11-16 11:57:38,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20917 states, 20628 states have (on average 3.3117122357960054) internal successors, (68314), 20916 states have internal predecessors, (68314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:38,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20917 states to 20917 states and 68314 transitions. [2022-11-16 11:57:38,153 INFO L78 Accepts]: Start accepts. Automaton has 20917 states and 68314 transitions. Word has length 15 [2022-11-16 11:57:38,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:38,154 INFO L495 AbstractCegarLoop]: Abstraction has 20917 states and 68314 transitions. [2022-11-16 11:57:38,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:38,154 INFO L276 IsEmpty]: Start isEmpty. Operand 20917 states and 68314 transitions. [2022-11-16 11:57:38,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:57:38,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:38,157 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:38,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-16 11:57:38,158 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting writer_fnErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 11:57:38,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:38,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1188295912, now seen corresponding path program 1 times [2022-11-16 11:57:38,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:38,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875753086] [2022-11-16 11:57:38,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:38,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:38,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:38,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:38,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:38,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875753086] [2022-11-16 11:57:38,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875753086] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:38,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:38,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:57:38,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095888335] [2022-11-16 11:57:38,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:38,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:57:38,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:38,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:57:38,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:57:38,292 INFO L87 Difference]: Start difference. First operand 20917 states and 68314 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:38,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:38,546 INFO L93 Difference]: Finished difference Result 7779 states and 21748 transitions. [2022-11-16 11:57:38,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:57:38,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 11:57:38,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:38,572 INFO L225 Difference]: With dead ends: 7779 [2022-11-16 11:57:38,573 INFO L226 Difference]: Without dead ends: 7779 [2022-11-16 11:57:38,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:57:38,574 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 79 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:38,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 57 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:57:38,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7779 states. [2022-11-16 11:57:38,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7779 to 7545. [2022-11-16 11:57:38,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7545 states, 7388 states have (on average 2.9137791012452627) internal successors, (21527), 7544 states have internal predecessors, (21527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:38,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7545 states to 7545 states and 21527 transitions. [2022-11-16 11:57:38,774 INFO L78 Accepts]: Start accepts. Automaton has 7545 states and 21527 transitions. Word has length 16 [2022-11-16 11:57:38,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:38,775 INFO L495 AbstractCegarLoop]: Abstraction has 7545 states and 21527 transitions. [2022-11-16 11:57:38,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:38,775 INFO L276 IsEmpty]: Start isEmpty. Operand 7545 states and 21527 transitions. [2022-11-16 11:57:38,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:57:38,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:38,777 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:38,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-16 11:57:38,777 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting reader_twoErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 11:57:38,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:38,778 INFO L85 PathProgramCache]: Analyzing trace with hash -2079789687, now seen corresponding path program 1 times [2022-11-16 11:57:38,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:38,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339126557] [2022-11-16 11:57:38,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:38,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:38,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:39,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:39,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:39,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339126557] [2022-11-16 11:57:39,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339126557] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:39,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:39,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:57:39,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92036934] [2022-11-16 11:57:39,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:39,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:57:39,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:39,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:57:39,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:57:39,435 INFO L87 Difference]: Start difference. First operand 7545 states and 21527 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:40,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:40,181 INFO L93 Difference]: Finished difference Result 8035 states and 23071 transitions. [2022-11-16 11:57:40,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:57:40,181 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 11:57:40,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:40,204 INFO L225 Difference]: With dead ends: 8035 [2022-11-16 11:57:40,205 INFO L226 Difference]: Without dead ends: 8035 [2022-11-16 11:57:40,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:57:40,206 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 204 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:40,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 116 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 11:57:40,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8035 states. [2022-11-16 11:57:40,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8035 to 7869. [2022-11-16 11:57:40,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7869 states, 7712 states have (on average 2.9146784232365146) internal successors, (22478), 7868 states have internal predecessors, (22478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:40,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7869 states to 7869 states and 22478 transitions. [2022-11-16 11:57:40,408 INFO L78 Accepts]: Start accepts. Automaton has 7869 states and 22478 transitions. Word has length 16 [2022-11-16 11:57:40,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:40,408 INFO L495 AbstractCegarLoop]: Abstraction has 7869 states and 22478 transitions. [2022-11-16 11:57:40,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:40,409 INFO L276 IsEmpty]: Start isEmpty. Operand 7869 states and 22478 transitions. [2022-11-16 11:57:40,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:57:40,411 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:40,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:40,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-16 11:57:40,411 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting reader_twoErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 11:57:40,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:40,412 INFO L85 PathProgramCache]: Analyzing trace with hash -382544743, now seen corresponding path program 2 times [2022-11-16 11:57:40,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:40,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486485138] [2022-11-16 11:57:40,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:40,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:40,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:40,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:40,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:40,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486485138] [2022-11-16 11:57:40,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486485138] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:40,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:40,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:57:40,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79311342] [2022-11-16 11:57:40,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:40,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:57:40,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:40,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:57:40,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:57:40,973 INFO L87 Difference]: Start difference. First operand 7869 states and 22478 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:41,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:41,703 INFO L93 Difference]: Finished difference Result 8089 states and 23225 transitions. [2022-11-16 11:57:41,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:57:41,703 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 11:57:41,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:41,727 INFO L225 Difference]: With dead ends: 8089 [2022-11-16 11:57:41,727 INFO L226 Difference]: Without dead ends: 8089 [2022-11-16 11:57:41,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:57:41,728 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 177 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:41,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 116 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:57:41,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8089 states. [2022-11-16 11:57:41,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8089 to 7572. [2022-11-16 11:57:41,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7572 states, 7415 states have (on average 2.913553607552259) internal successors, (21604), 7571 states have internal predecessors, (21604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:41,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7572 states to 7572 states and 21604 transitions. [2022-11-16 11:57:41,874 INFO L78 Accepts]: Start accepts. Automaton has 7572 states and 21604 transitions. Word has length 16 [2022-11-16 11:57:41,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:41,874 INFO L495 AbstractCegarLoop]: Abstraction has 7572 states and 21604 transitions. [2022-11-16 11:57:41,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:41,875 INFO L276 IsEmpty]: Start isEmpty. Operand 7572 states and 21604 transitions. [2022-11-16 11:57:41,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:57:41,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:41,877 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:41,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-16 11:57:41,877 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting reader_twoErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 11:57:41,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:41,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1456256853, now seen corresponding path program 3 times [2022-11-16 11:57:41,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:41,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358897461] [2022-11-16 11:57:41,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:41,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:41,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:42,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:42,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:42,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358897461] [2022-11-16 11:57:42,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358897461] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:42,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:42,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:57:42,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399708758] [2022-11-16 11:57:42,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:42,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:57:42,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:42,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:57:42,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:57:42,348 INFO L87 Difference]: Start difference. First operand 7572 states and 21604 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:42,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:42,962 INFO L93 Difference]: Finished difference Result 7603 states and 21704 transitions. [2022-11-16 11:57:42,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:57:42,963 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 11:57:42,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:42,982 INFO L225 Difference]: With dead ends: 7603 [2022-11-16 11:57:42,982 INFO L226 Difference]: Without dead ends: 7603 [2022-11-16 11:57:42,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:57:42,983 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 140 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:42,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 116 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:57:42,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7603 states. [2022-11-16 11:57:43,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7603 to 7528. [2022-11-16 11:57:43,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7528 states, 7371 states have (on average 2.9135802469135803) internal successors, (21476), 7527 states have internal predecessors, (21476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:43,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7528 states to 7528 states and 21476 transitions. [2022-11-16 11:57:43,111 INFO L78 Accepts]: Start accepts. Automaton has 7528 states and 21476 transitions. Word has length 16 [2022-11-16 11:57:43,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:43,111 INFO L495 AbstractCegarLoop]: Abstraction has 7528 states and 21476 transitions. [2022-11-16 11:57:43,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:43,111 INFO L276 IsEmpty]: Start isEmpty. Operand 7528 states and 21476 transitions. [2022-11-16 11:57:43,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-16 11:57:43,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:43,113 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:43,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-16 11:57:43,113 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting reader_twoErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 11:57:43,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:43,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1456257370, now seen corresponding path program 1 times [2022-11-16 11:57:43,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:43,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083485045] [2022-11-16 11:57:43,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:43,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:43,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:43,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:43,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083485045] [2022-11-16 11:57:43,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083485045] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:57:43,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:57:43,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:57:43,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511169449] [2022-11-16 11:57:43,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:57:43,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:57:43,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:43,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:57:43,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:57:43,161 INFO L87 Difference]: Start difference. First operand 7528 states and 21476 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:43,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:43,391 INFO L93 Difference]: Finished difference Result 7492 states and 21550 transitions. [2022-11-16 11:57:43,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:57:43,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-16 11:57:43,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:43,417 INFO L225 Difference]: With dead ends: 7492 [2022-11-16 11:57:43,418 INFO L226 Difference]: Without dead ends: 7492 [2022-11-16 11:57:43,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:57:43,420 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 77 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:43,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 39 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:57:43,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7492 states. [2022-11-16 11:57:43,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7492 to 7315. [2022-11-16 11:57:43,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7315 states, 7166 states have (on average 2.913340775886129) internal successors, (20877), 7314 states have internal predecessors, (20877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:43,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7315 states to 7315 states and 20877 transitions. [2022-11-16 11:57:43,572 INFO L78 Accepts]: Start accepts. Automaton has 7315 states and 20877 transitions. Word has length 16 [2022-11-16 11:57:43,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:43,572 INFO L495 AbstractCegarLoop]: Abstraction has 7315 states and 20877 transitions. [2022-11-16 11:57:43,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:43,573 INFO L276 IsEmpty]: Start isEmpty. Operand 7315 states and 20877 transitions. [2022-11-16 11:57:43,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:57:43,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:43,575 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:57:43,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-16 11:57:43,575 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 11:57:43,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:43,576 INFO L85 PathProgramCache]: Analyzing trace with hash -2118675380, now seen corresponding path program 1 times [2022-11-16 11:57:43,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:43,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002768123] [2022-11-16 11:57:43,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:43,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:44,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:44,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002768123] [2022-11-16 11:57:44,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002768123] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:57:44,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619813387] [2022-11-16 11:57:44,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:44,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:44,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:44,676 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:44,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:57:44,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:44,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-16 11:57:44,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:44,974 INFO L321 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2022-11-16 11:57:44,975 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 2 case distinctions, treesize of input 26 treesize of output 27 [2022-11-16 11:57:44,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:44,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2022-11-16 11:57:45,007 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 23 treesize of output 23 [2022-11-16 11:57:45,152 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 23 treesize of output 23 [2022-11-16 11:57:45,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 11:57:45,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:45,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:57:45,703 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-16 11:57:45,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 47 [2022-11-16 11:57:45,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 32 treesize of output 16 [2022-11-16 11:57:46,210 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:57:46,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2022-11-16 11:57:46,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:46,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:46,409 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 40 treesize of output 36 [2022-11-16 11:58:11,793 WARN L233 SmtUtils]: Spent 10.13s on a formula simplification. DAG size of input: 81 DAG size of output: 79 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:58:18,374 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:58:21,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:58:21,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619813387] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:58:21,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:58:21,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 14] total 39 [2022-11-16 11:58:21,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620227652] [2022-11-16 11:58:21,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:58:21,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-16 11:58:21,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:58:21,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-16 11:58:21,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1437, Unknown=4, NotChecked=0, Total=1640 [2022-11-16 11:58:21,664 INFO L87 Difference]: Start difference. First operand 7315 states and 20877 transitions. Second operand has 41 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:32,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:32,793 INFO L93 Difference]: Finished difference Result 10982 states and 31460 transitions. [2022-11-16 11:59:32,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-16 11:59:32,793 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 11:59:32,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:32,828 INFO L225 Difference]: With dead ends: 10982 [2022-11-16 11:59:32,828 INFO L226 Difference]: Without dead ends: 10982 [2022-11-16 11:59:32,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 18 SyntacticMatches, 14 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2499 ImplicationChecksByTransitivity, 100.2s TimeCoverageRelationStatistics Valid=1017, Invalid=5280, Unknown=23, NotChecked=0, Total=6320 [2022-11-16 11:59:32,830 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 807 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 3173 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 7031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 3173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3836 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:32,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [807 Valid, 758 Invalid, 7031 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [22 Valid, 3173 Invalid, 0 Unknown, 3836 Unchecked, 4.2s Time] [2022-11-16 11:59:32,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10982 states. [2022-11-16 11:59:33,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10982 to 9872. [2022-11-16 11:59:33,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9872 states, 9723 states have (on average 2.9372621618841923) internal successors, (28559), 9871 states have internal predecessors, (28559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:33,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9872 states to 9872 states and 28559 transitions. [2022-11-16 11:59:33,102 INFO L78 Accepts]: Start accepts. Automaton has 9872 states and 28559 transitions. Word has length 18 [2022-11-16 11:59:33,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:33,102 INFO L495 AbstractCegarLoop]: Abstraction has 9872 states and 28559 transitions. [2022-11-16 11:59:33,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:33,103 INFO L276 IsEmpty]: Start isEmpty. Operand 9872 states and 28559 transitions. [2022-11-16 11:59:33,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:59:33,106 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:33,106 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:33,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:59:33,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-16 11:59:33,311 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting writer_fnErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 11:59:33,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:33,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1057298436, now seen corresponding path program 1 times [2022-11-16 11:59:33,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:59:33,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840814108] [2022-11-16 11:59:33,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:33,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:59:33,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:59:34,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:34,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:59:34,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840814108] [2022-11-16 11:59:34,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840814108] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:59:34,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052231846] [2022-11-16 11:59:34,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:34,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:59:34,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:59:34,472 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:59:34,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:59:34,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:59:34,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-16 11:59:34,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:34,964 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-16 11:59:34,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-11-16 11:59:35,269 INFO L321 Elim1Store]: treesize reduction 14, result has 63.2 percent of original size [2022-11-16 11:59:35,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 60 [2022-11-16 11:59:35,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 28 treesize of output 10 [2022-11-16 11:59:35,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:35,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:59:35,805 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 40 treesize of output 36 [2022-11-16 11:59:38,232 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:59:38,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 644 treesize of output 606 [2022-11-16 11:59:40,385 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 12 treesize of output 8 [2022-11-16 11:59:40,393 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 12 treesize of output 8 [2022-11-16 11:59:40,418 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:59:40,418 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 264 treesize of output 212 [2022-11-16 11:59:40,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:40,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052231846] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:59:40,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:59:40,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 12] total 32 [2022-11-16 11:59:40,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708664691] [2022-11-16 11:59:40,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:59:40,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 11:59:40,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:59:40,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 11:59:40,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 11:59:40,940 INFO L87 Difference]: Start difference. First operand 9872 states and 28559 transitions. Second operand has 34 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:52,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:52,660 INFO L93 Difference]: Finished difference Result 25044 states and 69457 transitions. [2022-11-16 11:59:52,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-16 11:59:52,661 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 11:59:52,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:52,735 INFO L225 Difference]: With dead ends: 25044 [2022-11-16 11:59:52,735 INFO L226 Difference]: Without dead ends: 25044 [2022-11-16 11:59:52,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 18 SyntacticMatches, 11 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=692, Invalid=3090, Unknown=0, NotChecked=0, Total=3782 [2022-11-16 11:59:52,736 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 3017 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 6581 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3017 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 7762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 6581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1112 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:52,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3017 Valid, 883 Invalid, 7762 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [69 Valid, 6581 Invalid, 0 Unknown, 1112 Unchecked, 8.4s Time] [2022-11-16 11:59:52,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25044 states. [2022-11-16 11:59:53,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25044 to 14005. [2022-11-16 11:59:53,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14005 states, 13835 states have (on average 2.846548608601373) internal successors, (39382), 14004 states have internal predecessors, (39382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:53,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14005 states to 14005 states and 39382 transitions. [2022-11-16 11:59:53,215 INFO L78 Accepts]: Start accepts. Automaton has 14005 states and 39382 transitions. Word has length 18 [2022-11-16 11:59:53,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:53,216 INFO L495 AbstractCegarLoop]: Abstraction has 14005 states and 39382 transitions. [2022-11-16 11:59:53,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:53,216 INFO L276 IsEmpty]: Start isEmpty. Operand 14005 states and 39382 transitions. [2022-11-16 11:59:53,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:59:53,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:53,218 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:53,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:59:53,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-16 11:59:53,424 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting reader_twoErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 11:59:53,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:53,425 INFO L85 PathProgramCache]: Analyzing trace with hash -696055398, now seen corresponding path program 1 times [2022-11-16 11:59:53,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:59:53,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817927396] [2022-11-16 11:59:53,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:53,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:59:53,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:59:53,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:53,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:59:53,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817927396] [2022-11-16 11:59:53,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817927396] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:59:53,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:59:53,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:59:53,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777959349] [2022-11-16 11:59:53,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:59:53,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:59:53,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:59:53,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:59:53,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:59:53,515 INFO L87 Difference]: Start difference. First operand 14005 states and 39382 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 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) [2022-11-16 11:59:53,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:53,837 INFO L93 Difference]: Finished difference Result 13610 states and 38265 transitions. [2022-11-16 11:59:53,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:59:53,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 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 18 [2022-11-16 11:59:53,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:53,883 INFO L225 Difference]: With dead ends: 13610 [2022-11-16 11:59:53,883 INFO L226 Difference]: Without dead ends: 13610 [2022-11-16 11:59:53,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:59:53,885 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 43 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:53,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 43 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:59:53,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13610 states. [2022-11-16 11:59:54,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13610 to 13610. [2022-11-16 11:59:54,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13610 states, 13449 states have (on average 2.845192951148784) internal successors, (38265), 13609 states have internal predecessors, (38265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:54,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13610 states to 13610 states and 38265 transitions. [2022-11-16 11:59:54,117 INFO L78 Accepts]: Start accepts. Automaton has 13610 states and 38265 transitions. Word has length 18 [2022-11-16 11:59:54,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:54,117 INFO L495 AbstractCegarLoop]: Abstraction has 13610 states and 38265 transitions. [2022-11-16 11:59:54,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 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) [2022-11-16 11:59:54,117 INFO L276 IsEmpty]: Start isEmpty. Operand 13610 states and 38265 transitions. [2022-11-16 11:59:54,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:59:54,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:54,120 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:54,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-16 11:59:54,121 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting reader_twoErr13ASSERT_VIOLATIONMEMORY_LEAK === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 11:59:54,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:54,121 INFO L85 PathProgramCache]: Analyzing trace with hash -696055397, now seen corresponding path program 1 times [2022-11-16 11:59:54,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:59:54,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131366888] [2022-11-16 11:59:54,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:54,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:59:54,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:59:54,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:54,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:59:54,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131366888] [2022-11-16 11:59:54,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131366888] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:59:54,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:59:54,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:59:54,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584322190] [2022-11-16 11:59:54,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:59:54,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:59:54,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:59:54,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:59:54,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:59:54,568 INFO L87 Difference]: Start difference. First operand 13610 states and 38265 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 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) [2022-11-16 11:59:55,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:55,140 INFO L93 Difference]: Finished difference Result 13212 states and 37288 transitions. [2022-11-16 11:59:55,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:59:55,140 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 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 18 [2022-11-16 11:59:55,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:55,194 INFO L225 Difference]: With dead ends: 13212 [2022-11-16 11:59:55,194 INFO L226 Difference]: Without dead ends: 13212 [2022-11-16 11:59:55,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:59:55,195 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 27 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:55,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 131 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:59:55,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13212 states. [2022-11-16 11:59:55,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13212 to 13212. [2022-11-16 11:59:55,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13212 states, 13052 states have (on average 2.8568801716212073) internal successors, (37288), 13211 states have internal predecessors, (37288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:55,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13212 states to 13212 states and 37288 transitions. [2022-11-16 11:59:55,649 INFO L78 Accepts]: Start accepts. Automaton has 13212 states and 37288 transitions. Word has length 18 [2022-11-16 11:59:55,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:55,650 INFO L495 AbstractCegarLoop]: Abstraction has 13212 states and 37288 transitions. [2022-11-16 11:59:55,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 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) [2022-11-16 11:59:55,650 INFO L276 IsEmpty]: Start isEmpty. Operand 13212 states and 37288 transitions. [2022-11-16 11:59:55,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 11:59:55,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:55,653 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:55,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-16 11:59:55,653 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 11:59:55,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:55,654 INFO L85 PathProgramCache]: Analyzing trace with hash -948496301, now seen corresponding path program 1 times [2022-11-16 11:59:55,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:59:55,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584435498] [2022-11-16 11:59:55,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:55,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:59:55,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:59:56,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:56,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:59:56,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584435498] [2022-11-16 11:59:56,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584435498] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:59:56,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:59:56,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 11:59:56,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135123146] [2022-11-16 11:59:56,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:59:56,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:59:56,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:59:56,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:59:56,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:59:56,878 INFO L87 Difference]: Start difference. First operand 13212 states and 37288 transitions. Second operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:04,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:00:04,432 INFO L93 Difference]: Finished difference Result 22138 states and 60757 transitions. [2022-11-16 12:00:04,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 12:00:04,432 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:00:04,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:00:04,495 INFO L225 Difference]: With dead ends: 22138 [2022-11-16 12:00:04,495 INFO L226 Difference]: Without dead ends: 22138 [2022-11-16 12:00:04,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=197, Invalid=795, Unknown=0, NotChecked=0, Total=992 [2022-11-16 12:00:04,496 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 844 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 4867 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 4877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 4867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:00:04,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [844 Valid, 602 Invalid, 4877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 4867 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-11-16 12:00:04,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22138 states. [2022-11-16 12:00:04,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22138 to 17985. [2022-11-16 12:00:04,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17985 states, 17825 states have (on average 2.8383730715287516) internal successors, (50594), 17984 states have internal predecessors, (50594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:04,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17985 states to 17985 states and 50594 transitions. [2022-11-16 12:00:04,882 INFO L78 Accepts]: Start accepts. Automaton has 17985 states and 50594 transitions. Word has length 19 [2022-11-16 12:00:04,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:00:04,883 INFO L495 AbstractCegarLoop]: Abstraction has 17985 states and 50594 transitions. [2022-11-16 12:00:04,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:04,883 INFO L276 IsEmpty]: Start isEmpty. Operand 17985 states and 50594 transitions. [2022-11-16 12:00:04,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:00:04,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:00:04,885 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:04,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-16 12:00:04,885 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting writer_fnErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 12:00:04,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:04,887 INFO L85 PathProgramCache]: Analyzing trace with hash 551555358, now seen corresponding path program 1 times [2022-11-16 12:00:04,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:04,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814695771] [2022-11-16 12:00:04,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:04,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:04,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:06,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:06,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:06,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814695771] [2022-11-16 12:00:06,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814695771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:00:06,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:00:06,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 12:00:06,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277978969] [2022-11-16 12:00:06,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:00:06,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:00:06,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:06,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:00:06,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:00:06,180 INFO L87 Difference]: Start difference. First operand 17985 states and 50594 transitions. Second operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:13,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:00:13,029 INFO L93 Difference]: Finished difference Result 22151 states and 60949 transitions. [2022-11-16 12:00:13,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 12:00:13,030 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:00:13,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:00:13,094 INFO L225 Difference]: With dead ends: 22151 [2022-11-16 12:00:13,094 INFO L226 Difference]: Without dead ends: 22151 [2022-11-16 12:00:13,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:00:13,095 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 838 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 4740 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 4747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 4740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-16 12:00:13,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [838 Valid, 655 Invalid, 4747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 4740 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-11-16 12:00:13,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22151 states. [2022-11-16 12:00:13,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22151 to 19475. [2022-11-16 12:00:13,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19475 states, 19315 states have (on average 2.834377426870308) internal successors, (54746), 19474 states have internal predecessors, (54746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:13,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19475 states to 19475 states and 54746 transitions. [2022-11-16 12:00:13,700 INFO L78 Accepts]: Start accepts. Automaton has 19475 states and 54746 transitions. Word has length 19 [2022-11-16 12:00:13,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:00:13,700 INFO L495 AbstractCegarLoop]: Abstraction has 19475 states and 54746 transitions. [2022-11-16 12:00:13,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:13,700 INFO L276 IsEmpty]: Start isEmpty. Operand 19475 states and 54746 transitions. [2022-11-16 12:00:13,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:00:13,702 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:00:13,703 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:13,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-16 12:00:13,703 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting writer_fnErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 12:00:13,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:13,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1827420180, now seen corresponding path program 2 times [2022-11-16 12:00:13,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:13,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43951814] [2022-11-16 12:00:13,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:13,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:15,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:15,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:15,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43951814] [2022-11-16 12:00:15,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43951814] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:00:15,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:00:15,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-16 12:00:15,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411882403] [2022-11-16 12:00:15,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:00:15,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 12:00:15,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:15,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 12:00:15,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:00:15,324 INFO L87 Difference]: Start difference. First operand 19475 states and 54746 transitions. Second operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:22,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:00:22,954 INFO L93 Difference]: Finished difference Result 20180 states and 56441 transitions. [2022-11-16 12:00:22,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 12:00:22,954 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:00:22,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:00:23,009 INFO L225 Difference]: With dead ends: 20180 [2022-11-16 12:00:23,009 INFO L226 Difference]: Without dead ends: 20180 [2022-11-16 12:00:23,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2022-11-16 12:00:23,010 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 412 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 4917 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 4927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 4917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:00:23,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 395 Invalid, 4927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 4917 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-11-16 12:00:23,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20180 states. [2022-11-16 12:00:23,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20180 to 19404. [2022-11-16 12:00:23,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19404 states, 19244 states have (on average 2.8359488671793804) internal successors, (54575), 19403 states have internal predecessors, (54575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:23,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19404 states to 19404 states and 54575 transitions. [2022-11-16 12:00:23,372 INFO L78 Accepts]: Start accepts. Automaton has 19404 states and 54575 transitions. Word has length 19 [2022-11-16 12:00:23,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:00:23,373 INFO L495 AbstractCegarLoop]: Abstraction has 19404 states and 54575 transitions. [2022-11-16 12:00:23,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:23,373 INFO L276 IsEmpty]: Start isEmpty. Operand 19404 states and 54575 transitions. [2022-11-16 12:00:23,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:00:23,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:00:23,377 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:23,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-16 12:00:23,377 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 12:00:23,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:23,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1830551820, now seen corresponding path program 1 times [2022-11-16 12:00:23,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:23,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569694411] [2022-11-16 12:00:23,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:23,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:23,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:24,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:24,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:24,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569694411] [2022-11-16 12:00:24,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569694411] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:00:24,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856578606] [2022-11-16 12:00:24,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:24,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:24,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:00:24,439 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:00:24,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:00:24,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:24,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-16 12:00:24,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:25,040 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-16 12:00:25,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 31 [2022-11-16 12:00:25,336 INFO L321 Elim1Store]: treesize reduction 19, result has 60.4 percent of original size [2022-11-16 12:00:25,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 60 [2022-11-16 12:00:25,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 28 treesize of output 10 [2022-11-16 12:00:25,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:25,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:00:25,897 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 40 treesize of output 36 [2022-11-16 12:00:27,143 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:00:27,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 555 treesize of output 547 [2022-11-16 12:00:28,516 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 9 treesize of output 5 [2022-11-16 12:00:28,542 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:00:28,543 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 199 treesize of output 183 [2022-11-16 12:00:29,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:29,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856578606] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:00:29,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:00:29,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 32 [2022-11-16 12:00:29,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067201966] [2022-11-16 12:00:29,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:00:29,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 12:00:29,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:29,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 12:00:29,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:00:29,035 INFO L87 Difference]: Start difference. First operand 19404 states and 54575 transitions. Second operand has 34 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 33 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:37,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:00:37,888 INFO L93 Difference]: Finished difference Result 25612 states and 71087 transitions. [2022-11-16 12:00:37,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 12:00:37,889 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 33 states have internal predecessors, (51), 0 states have call successors, (0), 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 19 [2022-11-16 12:00:37,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:00:37,957 INFO L225 Difference]: With dead ends: 25612 [2022-11-16 12:00:37,957 INFO L226 Difference]: Without dead ends: 25612 [2022-11-16 12:00:37,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=319, Invalid=2033, Unknown=0, NotChecked=0, Total=2352 [2022-11-16 12:00:37,958 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 1319 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 5322 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1319 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 7219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 5322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1871 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:00:37,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1319 Valid, 881 Invalid, 7219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 5322 Invalid, 0 Unknown, 1871 Unchecked, 6.9s Time] [2022-11-16 12:00:37,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25612 states. [2022-11-16 12:00:38,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25612 to 19745. [2022-11-16 12:00:38,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19745 states, 19585 states have (on average 2.8473321419453663) internal successors, (55765), 19744 states have internal predecessors, (55765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:38,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19745 states to 19745 states and 55765 transitions. [2022-11-16 12:00:38,366 INFO L78 Accepts]: Start accepts. Automaton has 19745 states and 55765 transitions. Word has length 19 [2022-11-16 12:00:38,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:00:38,367 INFO L495 AbstractCegarLoop]: Abstraction has 19745 states and 55765 transitions. [2022-11-16 12:00:38,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 33 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:38,367 INFO L276 IsEmpty]: Start isEmpty. Operand 19745 states and 55765 transitions. [2022-11-16 12:00:38,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:00:38,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:00:38,369 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:38,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:00:38,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-16 12:00:38,569 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting writer_fnErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 12:00:38,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:38,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1362952424, now seen corresponding path program 3 times [2022-11-16 12:00:38,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:38,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008908336] [2022-11-16 12:00:38,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:38,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:38,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:39,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:39,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:39,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008908336] [2022-11-16 12:00:39,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008908336] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:00:39,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:00:39,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 12:00:39,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69660960] [2022-11-16 12:00:39,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:00:39,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:00:39,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:39,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:00:39,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:00:39,794 INFO L87 Difference]: Start difference. First operand 19745 states and 55765 transitions. Second operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:47,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:00:47,793 INFO L93 Difference]: Finished difference Result 21176 states and 59046 transitions. [2022-11-16 12:00:47,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 12:00:47,793 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:00:47,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:00:47,853 INFO L225 Difference]: With dead ends: 21176 [2022-11-16 12:00:47,853 INFO L226 Difference]: Without dead ends: 21176 [2022-11-16 12:00:47,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:00:47,855 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 759 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 5125 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 5134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 5125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:00:47,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [759 Valid, 546 Invalid, 5134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 5125 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-11-16 12:00:47,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21176 states. [2022-11-16 12:00:48,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21176 to 19747. [2022-11-16 12:00:48,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19747 states, 19587 states have (on average 2.847296676366978) internal successors, (55770), 19746 states have internal predecessors, (55770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:48,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19747 states to 19747 states and 55770 transitions. [2022-11-16 12:00:48,271 INFO L78 Accepts]: Start accepts. Automaton has 19747 states and 55770 transitions. Word has length 19 [2022-11-16 12:00:48,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:00:48,271 INFO L495 AbstractCegarLoop]: Abstraction has 19747 states and 55770 transitions. [2022-11-16 12:00:48,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:48,271 INFO L276 IsEmpty]: Start isEmpty. Operand 19747 states and 55770 transitions. [2022-11-16 12:00:48,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:00:48,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:00:48,274 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:48,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-16 12:00:48,275 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting writer_fnErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 12:00:48,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:48,275 INFO L85 PathProgramCache]: Analyzing trace with hash 665099044, now seen corresponding path program 4 times [2022-11-16 12:00:48,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:48,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451706106] [2022-11-16 12:00:48,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:48,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:48,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:49,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:49,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:49,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451706106] [2022-11-16 12:00:49,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451706106] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:00:49,501 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:00:49,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 12:00:49,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280687842] [2022-11-16 12:00:49,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:00:49,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:00:49,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:49,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:00:49,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:00:49,505 INFO L87 Difference]: Start difference. First operand 19747 states and 55770 transitions. Second operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:56,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:00:56,868 INFO L93 Difference]: Finished difference Result 22384 states and 62237 transitions. [2022-11-16 12:00:56,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 12:00:56,868 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:00:56,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:00:56,933 INFO L225 Difference]: With dead ends: 22384 [2022-11-16 12:00:56,933 INFO L226 Difference]: Without dead ends: 22384 [2022-11-16 12:00:56,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2022-11-16 12:00:56,934 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 760 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 4999 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 5006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 4999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:00:56,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [760 Valid, 596 Invalid, 5006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 4999 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-11-16 12:00:56,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22384 states. [2022-11-16 12:00:57,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22384 to 19807. [2022-11-16 12:00:57,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19807 states, 19647 states have (on average 2.8481193057464242) internal successors, (55957), 19806 states have internal predecessors, (55957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:57,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19807 states to 19807 states and 55957 transitions. [2022-11-16 12:00:57,477 INFO L78 Accepts]: Start accepts. Automaton has 19807 states and 55957 transitions. Word has length 19 [2022-11-16 12:00:57,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:00:57,477 INFO L495 AbstractCegarLoop]: Abstraction has 19807 states and 55957 transitions. [2022-11-16 12:00:57,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:57,477 INFO L276 IsEmpty]: Start isEmpty. Operand 19807 states and 55957 transitions. [2022-11-16 12:00:57,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:00:57,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:00:57,480 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:57,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-11-16 12:00:57,481 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting writer_fnErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 12:00:57,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:57,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1236164910, now seen corresponding path program 5 times [2022-11-16 12:00:57,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:57,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604101421] [2022-11-16 12:00:57,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:57,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:57,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:58,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:58,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:58,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604101421] [2022-11-16 12:00:58,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604101421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:00:58,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:00:58,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-16 12:00:58,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579522043] [2022-11-16 12:00:58,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:00:58,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:00:58,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:58,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:00:58,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:00:58,772 INFO L87 Difference]: Start difference. First operand 19807 states and 55957 transitions. Second operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:07,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:01:07,799 INFO L93 Difference]: Finished difference Result 20990 states and 58897 transitions. [2022-11-16 12:01:07,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 12:01:07,800 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:01:07,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:01:07,853 INFO L225 Difference]: With dead ends: 20990 [2022-11-16 12:01:07,854 INFO L226 Difference]: Without dead ends: 20990 [2022-11-16 12:01:07,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=372, Invalid=1520, Unknown=0, NotChecked=0, Total=1892 [2022-11-16 12:01:07,855 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 603 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 5858 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 5879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 5858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:01:07,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [603 Valid, 390 Invalid, 5879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 5858 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-11-16 12:01:07,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20990 states. [2022-11-16 12:01:08,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20990 to 19809. [2022-11-16 12:01:08,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19809 states, 19649 states have (on average 2.8504249580131304) internal successors, (56008), 19808 states have internal predecessors, (56008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:08,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19809 states to 19809 states and 56008 transitions. [2022-11-16 12:01:08,209 INFO L78 Accepts]: Start accepts. Automaton has 19809 states and 56008 transitions. Word has length 19 [2022-11-16 12:01:08,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:01:08,210 INFO L495 AbstractCegarLoop]: Abstraction has 19809 states and 56008 transitions. [2022-11-16 12:01:08,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:08,210 INFO L276 IsEmpty]: Start isEmpty. Operand 19809 states and 56008 transitions. [2022-11-16 12:01:08,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:01:08,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:01:08,213 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:01:08,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-16 12:01:08,213 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 12:01:08,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:08,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1233033270, now seen corresponding path program 2 times [2022-11-16 12:01:08,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:01:08,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749423302] [2022-11-16 12:01:08,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:01:08,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:01:08,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:01:09,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:09,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:01:09,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749423302] [2022-11-16 12:01:09,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749423302] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:01:09,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556343007] [2022-11-16 12:01:09,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:01:09,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:01:09,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:01:09,220 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:01:09,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:01:09,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:01:09,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:01:09,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-16 12:01:09,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:01:09,675 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-16 12:01:09,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 31 [2022-11-16 12:01:09,964 INFO L321 Elim1Store]: treesize reduction 19, result has 60.4 percent of original size [2022-11-16 12:01:09,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 60 [2022-11-16 12:01:10,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 28 treesize of output 10 [2022-11-16 12:01:10,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:10,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:01:10,277 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 40 treesize of output 36 [2022-11-16 12:01:11,241 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:01:11,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 641 treesize of output 631 [2022-11-16 12:01:15,971 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 12 treesize of output 8 [2022-11-16 12:01:16,084 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 12 treesize of output 8 [2022-11-16 12:01:16,153 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 12 treesize of output 8 [2022-11-16 12:01:16,201 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 9 treesize of output 5 [2022-11-16 12:01:16,239 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:01:16,239 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 163 treesize of output 151 [2022-11-16 12:01:16,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:16,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556343007] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:01:16,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:01:16,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 29 [2022-11-16 12:01:16,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021977376] [2022-11-16 12:01:16,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:01:16,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 12:01:16,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:01:16,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 12:01:16,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:01:16,910 INFO L87 Difference]: Start difference. First operand 19809 states and 56008 transitions. Second operand has 31 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:25,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:01:25,093 INFO L93 Difference]: Finished difference Result 24513 states and 68153 transitions. [2022-11-16 12:01:25,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 12:01:25,094 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 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 19 [2022-11-16 12:01:25,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:01:25,161 INFO L225 Difference]: With dead ends: 24513 [2022-11-16 12:01:25,161 INFO L226 Difference]: Without dead ends: 24513 [2022-11-16 12:01:25,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=280, Invalid=1700, Unknown=0, NotChecked=0, Total=1980 [2022-11-16 12:01:25,162 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 1379 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 4923 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1379 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 6787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 4923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1851 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:01:25,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1379 Valid, 792 Invalid, 6787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 4923 Invalid, 0 Unknown, 1851 Unchecked, 6.6s Time] [2022-11-16 12:01:25,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24513 states. [2022-11-16 12:01:25,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24513 to 18627. [2022-11-16 12:01:25,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18627 states, 18467 states have (on average 2.8356527860507934) internal successors, (52366), 18626 states have internal predecessors, (52366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:25,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18627 states to 18627 states and 52366 transitions. [2022-11-16 12:01:25,559 INFO L78 Accepts]: Start accepts. Automaton has 18627 states and 52366 transitions. Word has length 19 [2022-11-16 12:01:25,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:01:25,559 INFO L495 AbstractCegarLoop]: Abstraction has 18627 states and 52366 transitions. [2022-11-16 12:01:25,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.7) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:25,559 INFO L276 IsEmpty]: Start isEmpty. Operand 18627 states and 52366 transitions. [2022-11-16 12:01:25,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:01:25,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:01:25,561 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:01:25,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:01:25,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-16 12:01:25,762 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 12:01:25,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:25,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1602947939, now seen corresponding path program 2 times [2022-11-16 12:01:25,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:01:25,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23715688] [2022-11-16 12:01:25,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:01:25,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:01:25,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:01:26,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:26,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:01:26,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23715688] [2022-11-16 12:01:26,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23715688] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:01:26,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:01:26,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 12:01:26,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297265251] [2022-11-16 12:01:26,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:01:26,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:01:26,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:01:26,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:01:26,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:01:26,906 INFO L87 Difference]: Start difference. First operand 18627 states and 52366 transitions. Second operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:34,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:01:34,291 INFO L93 Difference]: Finished difference Result 28052 states and 77089 transitions. [2022-11-16 12:01:34,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 12:01:34,292 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:01:34,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:01:34,368 INFO L225 Difference]: With dead ends: 28052 [2022-11-16 12:01:34,368 INFO L226 Difference]: Without dead ends: 28052 [2022-11-16 12:01:34,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:01:34,369 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 801 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 4913 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 801 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 4920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 4913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:01:34,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [801 Valid, 648 Invalid, 4920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 4913 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-11-16 12:01:34,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28052 states. [2022-11-16 12:01:34,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28052 to 17550. [2022-11-16 12:01:34,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17550 states, 17390 states have (on average 2.866014951121334) internal successors, (49840), 17549 states have internal predecessors, (49840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:34,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17550 states to 17550 states and 49840 transitions. [2022-11-16 12:01:34,789 INFO L78 Accepts]: Start accepts. Automaton has 17550 states and 49840 transitions. Word has length 19 [2022-11-16 12:01:34,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:01:34,790 INFO L495 AbstractCegarLoop]: Abstraction has 17550 states and 49840 transitions. [2022-11-16 12:01:34,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:34,790 INFO L276 IsEmpty]: Start isEmpty. Operand 17550 states and 49840 transitions. [2022-11-16 12:01:34,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:01:34,792 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:01:34,792 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:01:34,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-11-16 12:01:34,792 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 12:01:34,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:34,793 INFO L85 PathProgramCache]: Analyzing trace with hash 942919477, now seen corresponding path program 3 times [2022-11-16 12:01:34,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:01:34,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824826544] [2022-11-16 12:01:34,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:01:34,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:01:34,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:01:35,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:35,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:01:35,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824826544] [2022-11-16 12:01:35,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824826544] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:01:35,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:01:35,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 12:01:35,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688113123] [2022-11-16 12:01:35,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:01:35,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:01:35,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:01:35,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:01:35,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:01:35,848 INFO L87 Difference]: Start difference. First operand 17550 states and 49840 transitions. Second operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:42,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:01:42,711 INFO L93 Difference]: Finished difference Result 20995 states and 58364 transitions. [2022-11-16 12:01:42,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 12:01:42,711 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:01:42,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:01:42,770 INFO L225 Difference]: With dead ends: 20995 [2022-11-16 12:01:42,770 INFO L226 Difference]: Without dead ends: 20995 [2022-11-16 12:01:42,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=177, Invalid=753, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:01:42,771 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 735 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 5642 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 5648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 5642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:01:42,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 611 Invalid, 5648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 5642 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-11-16 12:01:42,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20995 states. [2022-11-16 12:01:43,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20995 to 17596. [2022-11-16 12:01:43,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17596 states, 17436 states have (on average 2.869350768524891) internal successors, (50030), 17595 states have internal predecessors, (50030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:43,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17596 states to 17596 states and 50030 transitions. [2022-11-16 12:01:43,203 INFO L78 Accepts]: Start accepts. Automaton has 17596 states and 50030 transitions. Word has length 19 [2022-11-16 12:01:43,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:01:43,203 INFO L495 AbstractCegarLoop]: Abstraction has 17596 states and 50030 transitions. [2022-11-16 12:01:43,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:43,204 INFO L276 IsEmpty]: Start isEmpty. Operand 17596 states and 50030 transitions. [2022-11-16 12:01:43,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:01:43,205 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:01:43,206 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:01:43,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-11-16 12:01:43,206 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 12:01:43,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:43,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1332007251, now seen corresponding path program 4 times [2022-11-16 12:01:43,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:01:43,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803996289] [2022-11-16 12:01:43,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:01:43,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:01:43,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:01:44,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:44,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:01:44,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803996289] [2022-11-16 12:01:44,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803996289] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:01:44,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:01:44,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 12:01:44,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094802733] [2022-11-16 12:01:44,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:01:44,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:01:44,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:01:44,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:01:44,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:01:44,465 INFO L87 Difference]: Start difference. First operand 17596 states and 50030 transitions. Second operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:51,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:01:52,000 INFO L93 Difference]: Finished difference Result 21015 states and 58551 transitions. [2022-11-16 12:01:52,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 12:01:52,000 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:01:52,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:01:52,053 INFO L225 Difference]: With dead ends: 21015 [2022-11-16 12:01:52,053 INFO L226 Difference]: Without dead ends: 21015 [2022-11-16 12:01:52,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:01:52,054 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 753 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 4838 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 4845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 4838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:01:52,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [753 Valid, 477 Invalid, 4845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 4838 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-11-16 12:01:52,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21015 states. [2022-11-16 12:01:52,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21015 to 17609. [2022-11-16 12:01:52,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17609 states, 17449 states have (on average 2.8716258811393205) internal successors, (50107), 17608 states have internal predecessors, (50107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:52,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17609 states to 17609 states and 50107 transitions. [2022-11-16 12:01:52,395 INFO L78 Accepts]: Start accepts. Automaton has 17609 states and 50107 transitions. Word has length 19 [2022-11-16 12:01:52,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:01:52,396 INFO L495 AbstractCegarLoop]: Abstraction has 17609 states and 50107 transitions. [2022-11-16 12:01:52,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:52,396 INFO L276 IsEmpty]: Start isEmpty. Operand 17609 states and 50107 transitions. [2022-11-16 12:01:52,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:01:52,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:01:52,398 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:01:52,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-11-16 12:01:52,398 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 12:01:52,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:52,398 INFO L85 PathProgramCache]: Analyzing trace with hash 221166635, now seen corresponding path program 5 times [2022-11-16 12:01:52,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:01:52,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327852146] [2022-11-16 12:01:52,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:01:52,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:01:52,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:01:53,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:01:53,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:01:53,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327852146] [2022-11-16 12:01:53,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327852146] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:01:53,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:01:53,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 12:01:53,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868697567] [2022-11-16 12:01:53,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:01:53,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:01:53,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:01:53,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:01:53,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:01:53,405 INFO L87 Difference]: Start difference. First operand 17609 states and 50107 transitions. Second operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:02,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:02,731 INFO L93 Difference]: Finished difference Result 19176 states and 54247 transitions. [2022-11-16 12:02:02,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-16 12:02:02,732 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:02:02,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:02,776 INFO L225 Difference]: With dead ends: 19176 [2022-11-16 12:02:02,777 INFO L226 Difference]: Without dead ends: 19176 [2022-11-16 12:02:02,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=371, Invalid=1351, Unknown=0, NotChecked=0, Total=1722 [2022-11-16 12:02:02,777 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 504 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 5927 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 5941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 5927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:02,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 425 Invalid, 5941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 5927 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-11-16 12:02:02,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19176 states. [2022-11-16 12:02:03,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19176 to 17626. [2022-11-16 12:02:03,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17626 states, 17466 states have (on average 2.871979846559029) internal successors, (50162), 17625 states have internal predecessors, (50162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:03,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17626 states to 17626 states and 50162 transitions. [2022-11-16 12:02:03,098 INFO L78 Accepts]: Start accepts. Automaton has 17626 states and 50162 transitions. Word has length 19 [2022-11-16 12:02:03,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:03,098 INFO L495 AbstractCegarLoop]: Abstraction has 17626 states and 50162 transitions. [2022-11-16 12:02:03,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:03,099 INFO L276 IsEmpty]: Start isEmpty. Operand 17626 states and 50162 transitions. [2022-11-16 12:02:03,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:02:03,100 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:03,100 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:03,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-11-16 12:02:03,101 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 12:02:03,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:03,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1759657585, now seen corresponding path program 6 times [2022-11-16 12:02:03,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:03,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339466208] [2022-11-16 12:02:03,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:03,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:04,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:04,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:04,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339466208] [2022-11-16 12:02:04,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339466208] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:04,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:04,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 12:02:04,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469590695] [2022-11-16 12:02:04,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:04,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:02:04,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:04,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:02:04,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:02:04,096 INFO L87 Difference]: Start difference. First operand 17626 states and 50162 transitions. Second operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:11,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:11,208 INFO L93 Difference]: Finished difference Result 22140 states and 61545 transitions. [2022-11-16 12:02:11,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 12:02:11,208 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:02:11,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:11,261 INFO L225 Difference]: With dead ends: 22140 [2022-11-16 12:02:11,261 INFO L226 Difference]: Without dead ends: 22140 [2022-11-16 12:02:11,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:02:11,263 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 822 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 5325 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 5332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 5325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:11,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [822 Valid, 594 Invalid, 5332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 5325 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-11-16 12:02:11,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22140 states. [2022-11-16 12:02:11,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22140 to 17683. [2022-11-16 12:02:11,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17683 states, 17523 states have (on average 2.8726245505906522) internal successors, (50337), 17682 states have internal predecessors, (50337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:11,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17683 states to 17683 states and 50337 transitions. [2022-11-16 12:02:11,723 INFO L78 Accepts]: Start accepts. Automaton has 17683 states and 50337 transitions. Word has length 19 [2022-11-16 12:02:11,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:11,723 INFO L495 AbstractCegarLoop]: Abstraction has 17683 states and 50337 transitions. [2022-11-16 12:02:11,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:11,724 INFO L276 IsEmpty]: Start isEmpty. Operand 17683 states and 50337 transitions. [2022-11-16 12:02:11,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:02:11,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:11,726 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:11,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-11-16 12:02:11,727 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 12:02:11,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:11,727 INFO L85 PathProgramCache]: Analyzing trace with hash -2123814679, now seen corresponding path program 7 times [2022-11-16 12:02:11,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:11,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295769837] [2022-11-16 12:02:11,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:11,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:11,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:12,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:12,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:12,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295769837] [2022-11-16 12:02:12,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295769837] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:12,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:12,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 12:02:12,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251040751] [2022-11-16 12:02:12,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:12,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 12:02:12,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:12,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 12:02:12,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-11-16 12:02:12,727 INFO L87 Difference]: Start difference. First operand 17683 states and 50337 transitions. Second operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:22,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:22,553 INFO L93 Difference]: Finished difference Result 23380 states and 64878 transitions. [2022-11-16 12:02:22,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 12:02:22,554 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:02:22,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:22,618 INFO L225 Difference]: With dead ends: 23380 [2022-11-16 12:02:22,618 INFO L226 Difference]: Without dead ends: 23380 [2022-11-16 12:02:22,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=190, Invalid=802, Unknown=0, NotChecked=0, Total=992 [2022-11-16 12:02:22,619 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 860 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 6229 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 6236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 6229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:22,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [860 Valid, 580 Invalid, 6236 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [7 Valid, 6229 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2022-11-16 12:02:22,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23380 states. [2022-11-16 12:02:22,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23380 to 17779. [2022-11-16 12:02:22,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17779 states, 17619 states have (on average 2.8738293887280775) internal successors, (50634), 17778 states have internal predecessors, (50634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:23,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17779 states to 17779 states and 50634 transitions. [2022-11-16 12:02:23,179 INFO L78 Accepts]: Start accepts. Automaton has 17779 states and 50634 transitions. Word has length 19 [2022-11-16 12:02:23,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:23,179 INFO L495 AbstractCegarLoop]: Abstraction has 17779 states and 50634 transitions. [2022-11-16 12:02:23,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:23,179 INFO L276 IsEmpty]: Start isEmpty. Operand 17779 states and 50634 transitions. [2022-11-16 12:02:23,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:02:23,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:23,181 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:23,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-11-16 12:02:23,181 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting reader_twoErr13ASSERT_VIOLATIONMEMORY_LEAK === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 12:02:23,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:23,181 INFO L85 PathProgramCache]: Analyzing trace with hash 184620673, now seen corresponding path program 1 times [2022-11-16 12:02:23,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:23,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115816586] [2022-11-16 12:02:23,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:23,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:23,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:23,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:23,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115816586] [2022-11-16 12:02:23,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115816586] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:23,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:23,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:02:23,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368834819] [2022-11-16 12:02:23,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:23,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:02:23,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:23,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:02:23,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:02:23,600 INFO L87 Difference]: Start difference. First operand 17779 states and 50634 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:24,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:24,482 INFO L93 Difference]: Finished difference Result 18143 states and 51552 transitions. [2022-11-16 12:02:24,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:02:24,482 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:02:24,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:24,536 INFO L225 Difference]: With dead ends: 18143 [2022-11-16 12:02:24,537 INFO L226 Difference]: Without dead ends: 18143 [2022-11-16 12:02:24,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:02:24,537 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 111 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:24,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 152 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 12:02:24,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18143 states. [2022-11-16 12:02:24,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18143 to 18143. [2022-11-16 12:02:24,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18143 states, 17983 states have (on average 2.866707445921148) internal successors, (51552), 18142 states have internal predecessors, (51552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:24,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18143 states to 18143 states and 51552 transitions. [2022-11-16 12:02:24,882 INFO L78 Accepts]: Start accepts. Automaton has 18143 states and 51552 transitions. Word has length 19 [2022-11-16 12:02:24,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:24,882 INFO L495 AbstractCegarLoop]: Abstraction has 18143 states and 51552 transitions. [2022-11-16 12:02:24,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:24,883 INFO L276 IsEmpty]: Start isEmpty. Operand 18143 states and 51552 transitions. [2022-11-16 12:02:24,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:02:24,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:24,885 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:24,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-11-16 12:02:24,885 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting reader_twoErr13ASSERT_VIOLATIONMEMORY_LEAK === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 12:02:24,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:24,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1841228431, now seen corresponding path program 2 times [2022-11-16 12:02:24,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:24,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664874932] [2022-11-16 12:02:24,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:24,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:24,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:25,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:25,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:25,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664874932] [2022-11-16 12:02:25,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664874932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:25,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:25,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:02:25,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286202336] [2022-11-16 12:02:25,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:25,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:02:25,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:25,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:02:25,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:02:25,407 INFO L87 Difference]: Start difference. First operand 18143 states and 51552 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:26,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:26,346 INFO L93 Difference]: Finished difference Result 18175 states and 51629 transitions. [2022-11-16 12:02:26,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:02:26,347 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:02:26,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:26,398 INFO L225 Difference]: With dead ends: 18175 [2022-11-16 12:02:26,399 INFO L226 Difference]: Without dead ends: 18175 [2022-11-16 12:02:26,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:02:26,399 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 123 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:26,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 55 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 12:02:26,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18175 states. [2022-11-16 12:02:26,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18175 to 17783. [2022-11-16 12:02:26,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17783 states, 17623 states have (on average 2.8722691936673663) internal successors, (50618), 17782 states have internal predecessors, (50618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:26,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17783 states to 17783 states and 50618 transitions. [2022-11-16 12:02:26,744 INFO L78 Accepts]: Start accepts. Automaton has 17783 states and 50618 transitions. Word has length 19 [2022-11-16 12:02:26,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:26,745 INFO L495 AbstractCegarLoop]: Abstraction has 17783 states and 50618 transitions. [2022-11-16 12:02:26,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:26,745 INFO L276 IsEmpty]: Start isEmpty. Operand 17783 states and 50618 transitions. [2022-11-16 12:02:26,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:02:26,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:26,747 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:26,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-11-16 12:02:26,747 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting reader_twoErr13ASSERT_VIOLATIONMEMORY_LEAK === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 12:02:26,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:26,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1113177859, now seen corresponding path program 3 times [2022-11-16 12:02:26,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:26,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832070997] [2022-11-16 12:02:26,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:26,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:27,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:27,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:27,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832070997] [2022-11-16 12:02:27,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832070997] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:27,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:27,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:02:27,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157937324] [2022-11-16 12:02:27,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:27,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:02:27,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:27,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:02:27,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:02:27,368 INFO L87 Difference]: Start difference. First operand 17783 states and 50618 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:28,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:28,168 INFO L93 Difference]: Finished difference Result 16324 states and 46516 transitions. [2022-11-16 12:02:28,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:02:28,168 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 12:02:28,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:28,210 INFO L225 Difference]: With dead ends: 16324 [2022-11-16 12:02:28,210 INFO L226 Difference]: Without dead ends: 16324 [2022-11-16 12:02:28,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:02:28,211 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 81 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:28,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 152 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 12:02:28,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16324 states. [2022-11-16 12:02:28,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16324 to 16292. [2022-11-16 12:02:28,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16292 states, 16137 states have (on average 2.8775484910454234) internal successors, (46435), 16291 states have internal predecessors, (46435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:28,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16292 states to 16292 states and 46435 transitions. [2022-11-16 12:02:28,507 INFO L78 Accepts]: Start accepts. Automaton has 16292 states and 46435 transitions. Word has length 19 [2022-11-16 12:02:28,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:28,508 INFO L495 AbstractCegarLoop]: Abstraction has 16292 states and 46435 transitions. [2022-11-16 12:02:28,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:28,508 INFO L276 IsEmpty]: Start isEmpty. Operand 16292 states and 46435 transitions. [2022-11-16 12:02:28,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 12:02:28,510 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:28,510 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:28,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-11-16 12:02:28,510 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting writer_fnErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 12:02:28,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:28,511 INFO L85 PathProgramCache]: Analyzing trace with hash -81645466, now seen corresponding path program 1 times [2022-11-16 12:02:28,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:28,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207098571] [2022-11-16 12:02:28,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:28,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:28,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:29,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:29,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:29,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207098571] [2022-11-16 12:02:29,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207098571] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:29,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:29,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-16 12:02:29,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194592599] [2022-11-16 12:02:29,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:29,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 12:02:29,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:29,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 12:02:29,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:02:29,803 INFO L87 Difference]: Start difference. First operand 16292 states and 46435 transitions. Second operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 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) [2022-11-16 12:02:36,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:02:36,914 INFO L93 Difference]: Finished difference Result 19126 states and 53359 transitions. [2022-11-16 12:02:36,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 12:02:36,915 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 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 20 [2022-11-16 12:02:36,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:02:36,967 INFO L225 Difference]: With dead ends: 19126 [2022-11-16 12:02:36,967 INFO L226 Difference]: Without dead ends: 19126 [2022-11-16 12:02:36,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2022-11-16 12:02:36,968 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 591 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 4253 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 4273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 4253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:02:36,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [591 Valid, 350 Invalid, 4273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 4253 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-16 12:02:36,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19126 states. [2022-11-16 12:02:37,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19126 to 16294. [2022-11-16 12:02:37,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16294 states, 16139 states have (on average 2.877501703946961) internal successors, (46440), 16293 states have internal predecessors, (46440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:37,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16294 states to 16294 states and 46440 transitions. [2022-11-16 12:02:37,333 INFO L78 Accepts]: Start accepts. Automaton has 16294 states and 46440 transitions. Word has length 20 [2022-11-16 12:02:37,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:02:37,334 INFO L495 AbstractCegarLoop]: Abstraction has 16294 states and 46440 transitions. [2022-11-16 12:02:37,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 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) [2022-11-16 12:02:37,334 INFO L276 IsEmpty]: Start isEmpty. Operand 16294 states and 46440 transitions. [2022-11-16 12:02:37,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 12:02:37,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:02:37,337 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:37,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-11-16 12:02:37,337 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-16 12:02:37,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:37,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1502858595, now seen corresponding path program 1 times [2022-11-16 12:02:37,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:37,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370578266] [2022-11-16 12:02:37,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:37,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:37,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:38,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:38,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:38,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370578266] [2022-11-16 12:02:38,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370578266] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:02:38,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200318416] [2022-11-16 12:02:38,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:38,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:38,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:02:38,219 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:02:38,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99e10c6a-19b4-483b-95a0-69d4466eba58/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:02:38,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:38,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-16 12:02:38,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:38,683 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-16 12:02:38,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 31 [2022-11-16 12:02:39,067 INFO L321 Elim1Store]: treesize reduction 19, result has 60.4 percent of original size [2022-11-16 12:02:39,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 66 [2022-11-16 12:02:40,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:02:40,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2022-11-16 12:02:40,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:40,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:40,285 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 40 treesize of output 36 [2022-11-16 12:02:42,202 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:02:42,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 816 treesize of output 804 [2022-11-16 12:02:47,931 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 9 treesize of output 5 [2022-11-16 12:02:47,955 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 12:02:47,978 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 12:02:47,989 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 12:02:48,013 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 12:02:48,024 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 12:02:48,048 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 12:02:48,058 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 12:02:48,092 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 12:02:48,103 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 12:02:48,115 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 12:02:48,125 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 12:02:48,148 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 12:02:48,158 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 12:02:48,168 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 12:02:48,183 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 12:02:48,192 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 12:02:48,202 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 12:02:48,215 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 12:02:48,225 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 12:02:48,239 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 12:02:48,247 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 12:02:48,258 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 12:02:48,268 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-16 12:03:00,991 WARN L233 SmtUtils]: Spent 12.67s on a formula simplification that was a NOOP. DAG size: 906 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-16 12:03:00,992 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:03:00,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 21 select indices, 21 select index equivalence classes, 0 disjoint index pairs (out of 210 index pairs), introduced 21 new quantified variables, introduced 210 case distinctions, treesize of input 1487 treesize of output 3109 [2022-11-16 12:08:01,617 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts.