./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 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-divine/ring_2w1r-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN --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-6b4ec56 [2022-11-20 11:45:10,139 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:45:10,142 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:45:10,169 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:45:10,170 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:45:10,171 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:45:10,173 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:45:10,175 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:45:10,177 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:45:10,178 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:45:10,179 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:45:10,181 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:45:10,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:45:10,183 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:45:10,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:45:10,186 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:45:10,187 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:45:10,188 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:45:10,190 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:45:10,193 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:45:10,213 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:45:10,215 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:45:10,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:45:10,217 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:45:10,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:45:10,222 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:45:10,223 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:45:10,224 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:45:10,225 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:45:10,226 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:45:10,226 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:45:10,227 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:45:10,228 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:45:10,230 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:45:10,231 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:45:10,231 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:45:10,232 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:45:10,233 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:45:10,233 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:45:10,250 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:45:10,251 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:45:10,252 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-20 11:45:10,296 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:45:10,297 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:45:10,297 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:45:10,298 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:45:10,298 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:45:10,303 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:45:10,304 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:45:10,305 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:45:10,305 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:45:10,305 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:45:10,306 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:45:10,307 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 11:45:10,307 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:45:10,307 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:45:10,307 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:45:10,308 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 11:45:10,308 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 11:45:10,308 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 11:45:10,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:45:10,308 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 11:45:10,309 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:45:10,309 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:45:10,309 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:45:10,310 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:45:10,310 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:45:10,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:45:10,310 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:45:10,311 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:45:10,311 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:45:10,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:45:10,311 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_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 509c3c8c1895397e4c0d03f6462ad0ca0ed3ce99b40d08b775ab8473dba5ee1f [2022-11-20 11:45:10,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:45:10,742 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:45:10,744 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:45:10,746 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:45:10,746 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:45:10,748 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/pthread-divine/ring_2w1r-1.i [2022-11-20 11:45:14,375 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:45:14,816 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:45:14,817 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i [2022-11-20 11:45:14,836 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/data/6ed28dc32/5d25c4ca326a4228bfa9b5fa7f12e314/FLAG5a28cd9f4 [2022-11-20 11:45:14,854 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/data/6ed28dc32/5d25c4ca326a4228bfa9b5fa7f12e314 [2022-11-20 11:45:14,858 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:45:14,860 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:45:14,861 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:45:14,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:45:14,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:45:14,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:45:14" (1/1) ... [2022-11-20 11:45:14,900 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@afc20d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:14, skipping insertion in model container [2022-11-20 11:45:14,901 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:45:14" (1/1) ... [2022-11-20 11:45:14,910 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:45:14,992 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:45:15,168 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-20 11:45:15,607 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39095,39108] [2022-11-20 11:45:15,614 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39180,39193] [2022-11-20 11:45:15,617 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39232,39245] [2022-11-20 11:45:15,746 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49388,49401] [2022-11-20 11:45:15,747 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49437,49450] [2022-11-20 11:45:15,752 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49565,49578] [2022-11-20 11:45:15,755 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49623,49636] [2022-11-20 11:45:15,767 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:45:15,791 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:45:15,817 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-20 11:45:15,863 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39095,39108] [2022-11-20 11:45:15,865 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39180,39193] [2022-11-20 11:45:15,867 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[39232,39245] [2022-11-20 11:45:15,881 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49388,49401] [2022-11-20 11:45:15,882 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49437,49450] [2022-11-20 11:45:15,884 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49565,49578] [2022-11-20 11:45:15,885 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i[49623,49636] [2022-11-20 11:45:15,895 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:45:15,993 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:45:15,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:15 WrapperNode [2022-11-20 11:45:15,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:45:15,996 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:45:15,996 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:45:15,997 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:45:16,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:15" (1/1) ... [2022-11-20 11:45:16,044 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:15" (1/1) ... [2022-11-20 11:45:16,113 INFO L138 Inliner]: procedures = 310, calls = 70, calls flagged for inlining = 10, calls inlined = 8, statements flattened = 203 [2022-11-20 11:45:16,113 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:45:16,114 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:45:16,115 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:45:16,115 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:45:16,127 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:15" (1/1) ... [2022-11-20 11:45:16,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:15" (1/1) ... [2022-11-20 11:45:16,147 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:15" (1/1) ... [2022-11-20 11:45:16,158 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:15" (1/1) ... [2022-11-20 11:45:16,169 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:15" (1/1) ... [2022-11-20 11:45:16,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:15" (1/1) ... [2022-11-20 11:45:16,177 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:15" (1/1) ... [2022-11-20 11:45:16,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:15" (1/1) ... [2022-11-20 11:45:16,183 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:45:16,184 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:45:16,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:45:16,185 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:45:16,186 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:15" (1/1) ... [2022-11-20 11:45:16,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:45:16,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:45:16,226 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:45:16,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:45:16,281 INFO L130 BoogieDeclarations]: Found specification of procedure reader_two [2022-11-20 11:45:16,282 INFO L138 BoogieDeclarations]: Found implementation of procedure reader_two [2022-11-20 11:45:16,282 INFO L130 BoogieDeclarations]: Found specification of procedure writer_fn [2022-11-20 11:45:16,282 INFO L138 BoogieDeclarations]: Found implementation of procedure writer_fn [2022-11-20 11:45:16,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:45:16,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:45:16,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:45:16,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:45:16,283 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-20 11:45:16,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:45:16,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:45:16,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:45:16,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:45:16,286 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 11:45:16,647 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:45:16,650 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:45:17,258 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:45:17,270 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:45:17,274 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-20 11:45:17,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:45:17 BoogieIcfgContainer [2022-11-20 11:45:17,278 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:45:17,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:45:17,285 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:45:17,297 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:45:17,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:45:14" (1/3) ... [2022-11-20 11:45:17,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78c56b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:45:17, skipping insertion in model container [2022-11-20 11:45:17,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:45:15" (2/3) ... [2022-11-20 11:45:17,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78c56b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:45:17, skipping insertion in model container [2022-11-20 11:45:17,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:45:17" (3/3) ... [2022-11-20 11:45:17,304 INFO L112 eAbstractionObserver]: Analyzing ICFG ring_2w1r-1.i [2022-11-20 11:45:17,331 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:45:17,331 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 61 error locations. [2022-11-20 11:45:17,331 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 11:45:17,559 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 11:45:17,606 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 11:45:17,624 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 283 places, 293 transitions, 602 flow [2022-11-20 11:45:17,628 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 283 places, 293 transitions, 602 flow [2022-11-20 11:45:17,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 283 places, 293 transitions, 602 flow [2022-11-20 11:45:17,846 INFO L130 PetriNetUnfolder]: 17/291 cut-off events. [2022-11-20 11:45:17,846 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 11:45:17,858 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. [2022-11-20 11:45:17,877 INFO L119 LiptonReduction]: Number of co-enabled transitions 31324 [2022-11-20 11:45:33,954 INFO L134 LiptonReduction]: Checked pairs total: 108627 [2022-11-20 11:45:33,954 INFO L136 LiptonReduction]: Total number of compositions: 294 [2022-11-20 11:45:33,965 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 116 places, 119 transitions, 254 flow [2022-11-20 11:45:34,995 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) [2022-11-20 11:45:35,024 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:45:35,037 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;@19855f21, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:45:35,037 INFO L358 AbstractCegarLoop]: Starting to check reachability of 99 error locations. [2022-11-20 11:45:35,165 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) [2022-11-20 11:45:35,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-20 11:45:35,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:35,173 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-20 11:45:35,174 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)] === [2022-11-20 11:45:35,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:35,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1135, now seen corresponding path program 1 times [2022-11-20 11:45:35,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:35,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790184184] [2022-11-20 11:45:35,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:35,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:35,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:35,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:35,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:35,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790184184] [2022-11-20 11:45:35,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790184184] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:45:35,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:45:35,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-20 11:45:35,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841763768] [2022-11-20 11:45:35,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:45:35,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 11:45:35,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:35,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 11:45:35,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 11:45:35,447 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) [2022-11-20 11:45:36,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:36,209 INFO L93 Difference]: Finished difference Result 19244 states and 60216 transitions. [2022-11-20 11:45:36,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 11:45:36,212 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 [2022-11-20 11:45:36,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:36,510 INFO L225 Difference]: With dead ends: 19244 [2022-11-20 11:45:36,510 INFO L226 Difference]: Without dead ends: 19244 [2022-11-20 11:45:36,512 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 [2022-11-20 11:45:36,524 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:36,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:45:36,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19244 states. [2022-11-20 11:45:37,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19244 to 19244. [2022-11-20 11:45:37,829 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) [2022-11-20 11:45:37,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19244 states to 19244 states and 60216 transitions. [2022-11-20 11:45:37,963 INFO L78 Accepts]: Start accepts. Automaton has 19244 states and 60216 transitions. Word has length 1 [2022-11-20 11:45:37,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:37,963 INFO L495 AbstractCegarLoop]: Abstraction has 19244 states and 60216 transitions. [2022-11-20 11:45:37,964 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) [2022-11-20 11:45:37,966 INFO L276 IsEmpty]: Start isEmpty. Operand 19244 states and 60216 transitions. [2022-11-20 11:45:37,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 11:45:37,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:37,968 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 11:45:37,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:45:37,969 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)] === [2022-11-20 11:45:37,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:37,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1123942, now seen corresponding path program 1 times [2022-11-20 11:45:37,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:37,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18856098] [2022-11-20 11:45:37,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:37,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:38,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:38,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:38,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:38,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18856098] [2022-11-20 11:45:38,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18856098] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:45:38,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:45:38,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 11:45:38,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027408749] [2022-11-20 11:45:38,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:45:38,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:45:38,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:38,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:45:38,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:45:38,582 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) [2022-11-20 11:45:39,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:39,303 INFO L93 Difference]: Finished difference Result 19782 states and 61358 transitions. [2022-11-20 11:45:39,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:45:39,303 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 [2022-11-20 11:45:39,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:39,457 INFO L225 Difference]: With dead ends: 19782 [2022-11-20 11:45:39,458 INFO L226 Difference]: Without dead ends: 19782 [2022-11-20 11:45:39,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:45:39,461 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 [2022-11-20 11:45:39,467 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] [2022-11-20 11:45:39,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19782 states. [2022-11-20 11:45:40,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19782 to 19452. [2022-11-20 11:45:40,315 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) [2022-11-20 11:45:40,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19452 states to 19452 states and 61013 transitions. [2022-11-20 11:45:40,567 INFO L78 Accepts]: Start accepts. Automaton has 19452 states and 61013 transitions. Word has length 3 [2022-11-20 11:45:40,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:40,568 INFO L495 AbstractCegarLoop]: Abstraction has 19452 states and 61013 transitions. [2022-11-20 11:45:40,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:45:40,569 INFO L276 IsEmpty]: Start isEmpty. Operand 19452 states and 61013 transitions. [2022-11-20 11:45:40,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 11:45:40,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:40,569 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 11:45:40,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:45:40,570 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)] === [2022-11-20 11:45:40,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:40,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1123943, now seen corresponding path program 1 times [2022-11-20 11:45:40,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:40,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393749658] [2022-11-20 11:45:40,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:40,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:40,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:40,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:40,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393749658] [2022-11-20 11:45:40,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393749658] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:45:40,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:45:40,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:45:40,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851971870] [2022-11-20 11:45:40,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:45:40,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:45:40,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:40,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:45:40,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:45:40,954 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) [2022-11-20 11:45:41,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:41,576 INFO L93 Difference]: Finished difference Result 19451 states and 61011 transitions. [2022-11-20 11:45:41,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:45:41,577 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 [2022-11-20 11:45:41,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:41,737 INFO L225 Difference]: With dead ends: 19451 [2022-11-20 11:45:41,737 INFO L226 Difference]: Without dead ends: 19451 [2022-11-20 11:45:41,739 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 [2022-11-20 11:45:41,742 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 51 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:41,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 63 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:45:41,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19451 states. [2022-11-20 11:45:42,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19451 to 19451. [2022-11-20 11:45:42,575 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) [2022-11-20 11:45:42,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19451 states to 19451 states and 61011 transitions. [2022-11-20 11:45:42,673 INFO L78 Accepts]: Start accepts. Automaton has 19451 states and 61011 transitions. Word has length 3 [2022-11-20 11:45:42,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:42,676 INFO L495 AbstractCegarLoop]: Abstraction has 19451 states and 61011 transitions. [2022-11-20 11:45:42,677 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) [2022-11-20 11:45:42,677 INFO L276 IsEmpty]: Start isEmpty. Operand 19451 states and 61011 transitions. [2022-11-20 11:45:42,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 11:45:42,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:42,678 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 11:45:42,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:45:42,683 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)] === [2022-11-20 11:45:42,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:42,684 INFO L85 PathProgramCache]: Analyzing trace with hash 34842953, now seen corresponding path program 1 times [2022-11-20 11:45:42,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:42,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503636863] [2022-11-20 11:45:42,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:42,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:42,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:43,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:43,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:43,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503636863] [2022-11-20 11:45:43,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503636863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:45:43,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:45:43,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:45:43,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652379439] [2022-11-20 11:45:43,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:45:43,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:45:43,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:43,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:45:43,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:45:43,215 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) [2022-11-20 11:45:43,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:43,701 INFO L93 Difference]: Finished difference Result 19394 states and 60872 transitions. [2022-11-20 11:45:43,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:45:43,702 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 [2022-11-20 11:45:43,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:43,853 INFO L225 Difference]: With dead ends: 19394 [2022-11-20 11:45:43,853 INFO L226 Difference]: Without dead ends: 19394 [2022-11-20 11:45:43,853 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 [2022-11-20 11:45:43,854 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, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:43,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 63 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:45:44,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19394 states. [2022-11-20 11:45:44,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19394 to 19394. [2022-11-20 11:45:44,884 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) [2022-11-20 11:45:45,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19394 states to 19394 states and 60872 transitions. [2022-11-20 11:45:45,014 INFO L78 Accepts]: Start accepts. Automaton has 19394 states and 60872 transitions. Word has length 4 [2022-11-20 11:45:45,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:45,015 INFO L495 AbstractCegarLoop]: Abstraction has 19394 states and 60872 transitions. [2022-11-20 11:45:45,015 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) [2022-11-20 11:45:45,016 INFO L276 IsEmpty]: Start isEmpty. Operand 19394 states and 60872 transitions. [2022-11-20 11:45:45,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 11:45:45,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:45,017 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 11:45:45,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:45:45,017 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)] === [2022-11-20 11:45:45,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:45,018 INFO L85 PathProgramCache]: Analyzing trace with hash -875586760, now seen corresponding path program 1 times [2022-11-20 11:45:45,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:45,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860711089] [2022-11-20 11:45:45,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:45,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:45,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:45,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:45,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860711089] [2022-11-20 11:45:45,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860711089] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:45:45,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:45:45,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:45:45,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729770709] [2022-11-20 11:45:45,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:45:45,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:45:45,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:45,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:45:45,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:45:45,076 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) [2022-11-20 11:45:45,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:45,909 INFO L93 Difference]: Finished difference Result 35410 states and 111430 transitions. [2022-11-20 11:45:45,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:45:45,910 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 [2022-11-20 11:45:45,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:46,044 INFO L225 Difference]: With dead ends: 35410 [2022-11-20 11:45:46,044 INFO L226 Difference]: Without dead ends: 35410 [2022-11-20 11:45:46,045 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 [2022-11-20 11:45:46,046 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 [2022-11-20 11:45:46,046 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] [2022-11-20 11:45:46,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35410 states. [2022-11-20 11:45:47,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35410 to 20208. [2022-11-20 11:45:47,120 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) [2022-11-20 11:45:47,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20208 states to 20208 states and 63373 transitions. [2022-11-20 11:45:47,214 INFO L78 Accepts]: Start accepts. Automaton has 20208 states and 63373 transitions. Word has length 6 [2022-11-20 11:45:47,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:47,214 INFO L495 AbstractCegarLoop]: Abstraction has 20208 states and 63373 transitions. [2022-11-20 11:45:47,215 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) [2022-11-20 11:45:47,215 INFO L276 IsEmpty]: Start isEmpty. Operand 20208 states and 63373 transitions. [2022-11-20 11:45:47,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 11:45:47,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:47,216 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:47,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:45:47,216 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)] === [2022-11-20 11:45:47,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:47,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1373384667, now seen corresponding path program 1 times [2022-11-20 11:45:47,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:47,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950102635] [2022-11-20 11:45:47,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:47,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:47,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:47,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:47,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:47,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950102635] [2022-11-20 11:45:47,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950102635] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:45:47,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:45:47,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:45:47,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860358709] [2022-11-20 11:45:47,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:45:47,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:45:47,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:47,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:45:47,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:45:47,360 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) [2022-11-20 11:45:48,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:48,124 INFO L93 Difference]: Finished difference Result 16051 states and 49788 transitions. [2022-11-20 11:45:48,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:45:48,125 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 [2022-11-20 11:45:48,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:48,199 INFO L225 Difference]: With dead ends: 16051 [2022-11-20 11:45:48,199 INFO L226 Difference]: Without dead ends: 16051 [2022-11-20 11:45:48,200 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 [2022-11-20 11:45:48,200 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 268 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:48,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 126 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:45:48,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16051 states. [2022-11-20 11:45:48,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16051 to 15742. [2022-11-20 11:45:48,885 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) [2022-11-20 11:45:48,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15742 states to 15742 states and 49288 transitions. [2022-11-20 11:45:48,958 INFO L78 Accepts]: Start accepts. Automaton has 15742 states and 49288 transitions. Word has length 7 [2022-11-20 11:45:48,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:48,960 INFO L495 AbstractCegarLoop]: Abstraction has 15742 states and 49288 transitions. [2022-11-20 11:45:48,960 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) [2022-11-20 11:45:48,960 INFO L276 IsEmpty]: Start isEmpty. Operand 15742 states and 49288 transitions. [2022-11-20 11:45:48,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 11:45:48,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:48,962 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:48,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 11:45:48,962 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)] === [2022-11-20 11:45:48,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:48,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1373384666, now seen corresponding path program 1 times [2022-11-20 11:45:48,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:48,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223524174] [2022-11-20 11:45:48,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:48,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:49,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:49,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:49,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223524174] [2022-11-20 11:45:49,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223524174] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:45:49,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:45:49,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:45:49,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851752281] [2022-11-20 11:45:49,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:45:49,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:45:49,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:49,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:45:49,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:45:49,176 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) [2022-11-20 11:45:49,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:49,714 INFO L93 Difference]: Finished difference Result 15632 states and 48953 transitions. [2022-11-20 11:45:49,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:45:49,715 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 [2022-11-20 11:45:49,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:49,774 INFO L225 Difference]: With dead ends: 15632 [2022-11-20 11:45:49,774 INFO L226 Difference]: Without dead ends: 15632 [2022-11-20 11:45:49,774 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 [2022-11-20 11:45:49,775 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 [2022-11-20 11:45:49,776 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] [2022-11-20 11:45:49,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15632 states. [2022-11-20 11:45:50,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15632 to 15632. [2022-11-20 11:45:50,523 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) [2022-11-20 11:45:50,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15632 states to 15632 states and 48953 transitions. [2022-11-20 11:45:50,618 INFO L78 Accepts]: Start accepts. Automaton has 15632 states and 48953 transitions. Word has length 7 [2022-11-20 11:45:50,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:50,619 INFO L495 AbstractCegarLoop]: Abstraction has 15632 states and 48953 transitions. [2022-11-20 11:45:50,619 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) [2022-11-20 11:45:50,619 INFO L276 IsEmpty]: Start isEmpty. Operand 15632 states and 48953 transitions. [2022-11-20 11:45:50,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 11:45:50,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:50,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:50,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 11:45:50,621 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)] === [2022-11-20 11:45:50,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:50,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1373487387, now seen corresponding path program 1 times [2022-11-20 11:45:50,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:50,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562661977] [2022-11-20 11:45:50,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:50,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:50,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:50,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:50,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562661977] [2022-11-20 11:45:50,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562661977] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:45:50,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:45:50,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:45:50,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568004164] [2022-11-20 11:45:50,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:45:50,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:45:50,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:50,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:45:50,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:45:50,748 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) [2022-11-20 11:45:51,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:51,734 INFO L93 Difference]: Finished difference Result 13490 states and 41803 transitions. [2022-11-20 11:45:51,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:45:51,735 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 [2022-11-20 11:45:51,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:51,799 INFO L225 Difference]: With dead ends: 13490 [2022-11-20 11:45:51,799 INFO L226 Difference]: Without dead ends: 13490 [2022-11-20 11:45:51,799 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 [2022-11-20 11:45:51,800 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 323 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:51,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 186 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 11:45:51,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13490 states. [2022-11-20 11:45:52,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13490 to 11824. [2022-11-20 11:45:52,226 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) [2022-11-20 11:45:52,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11824 states to 11824 states and 37076 transitions. [2022-11-20 11:45:52,305 INFO L78 Accepts]: Start accepts. Automaton has 11824 states and 37076 transitions. Word has length 7 [2022-11-20 11:45:52,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:52,305 INFO L495 AbstractCegarLoop]: Abstraction has 11824 states and 37076 transitions. [2022-11-20 11:45:52,306 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) [2022-11-20 11:45:52,306 INFO L276 IsEmpty]: Start isEmpty. Operand 11824 states and 37076 transitions. [2022-11-20 11:45:52,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 11:45:52,309 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:52,309 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:52,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 11:45:52,309 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)] === [2022-11-20 11:45:52,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:52,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1373487386, now seen corresponding path program 1 times [2022-11-20 11:45:52,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:52,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937523548] [2022-11-20 11:45:52,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:52,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:52,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:52,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:52,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937523548] [2022-11-20 11:45:52,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937523548] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:45:52,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:45:52,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:45:52,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21026584] [2022-11-20 11:45:52,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:45:52,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:45:52,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:52,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:45:52,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:45:52,551 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) [2022-11-20 11:45:53,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:53,186 INFO L93 Difference]: Finished difference Result 11782 states and 36947 transitions. [2022-11-20 11:45:53,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:45:53,187 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 [2022-11-20 11:45:53,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:53,261 INFO L225 Difference]: With dead ends: 11782 [2022-11-20 11:45:53,261 INFO L226 Difference]: Without dead ends: 11782 [2022-11-20 11:45:53,262 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 [2022-11-20 11:45:53,264 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, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:53,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 109 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:45:53,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11782 states. [2022-11-20 11:45:53,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11782 to 11754. [2022-11-20 11:45:53,745 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) [2022-11-20 11:45:53,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11754 states to 11754 states and 36861 transitions. [2022-11-20 11:45:53,797 INFO L78 Accepts]: Start accepts. Automaton has 11754 states and 36861 transitions. Word has length 7 [2022-11-20 11:45:53,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:53,797 INFO L495 AbstractCegarLoop]: Abstraction has 11754 states and 36861 transitions. [2022-11-20 11:45:53,797 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) [2022-11-20 11:45:53,798 INFO L276 IsEmpty]: Start isEmpty. Operand 11754 states and 36861 transitions. [2022-11-20 11:45:53,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 11:45:53,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:53,799 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:53,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 11:45:53,799 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)] === [2022-11-20 11:45:53,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:53,800 INFO L85 PathProgramCache]: Analyzing trace with hash 374719424, now seen corresponding path program 1 times [2022-11-20 11:45:53,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:53,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714713467] [2022-11-20 11:45:53,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:53,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:53,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:54,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:54,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:54,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714713467] [2022-11-20 11:45:54,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714713467] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:45:54,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:45:54,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:45:54,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453976893] [2022-11-20 11:45:54,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:45:54,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:45:54,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:54,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:45:54,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:45:54,100 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) [2022-11-20 11:45:55,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:55,045 INFO L93 Difference]: Finished difference Result 19686 states and 61317 transitions. [2022-11-20 11:45:55,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:45:55,046 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 [2022-11-20 11:45:55,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:55,113 INFO L225 Difference]: With dead ends: 19686 [2022-11-20 11:45:55,113 INFO L226 Difference]: Without dead ends: 19686 [2022-11-20 11:45:55,114 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 [2022-11-20 11:45:55,114 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 [2022-11-20 11:45:55,114 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] [2022-11-20 11:45:55,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19686 states. [2022-11-20 11:45:55,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19686 to 15634. [2022-11-20 11:45:55,667 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) [2022-11-20 11:45:55,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15634 states to 15634 states and 50257 transitions. [2022-11-20 11:45:55,737 INFO L78 Accepts]: Start accepts. Automaton has 15634 states and 50257 transitions. Word has length 8 [2022-11-20 11:45:55,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:55,737 INFO L495 AbstractCegarLoop]: Abstraction has 15634 states and 50257 transitions. [2022-11-20 11:45:55,737 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) [2022-11-20 11:45:55,737 INFO L276 IsEmpty]: Start isEmpty. Operand 15634 states and 50257 transitions. [2022-11-20 11:45:55,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 11:45:55,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:55,738 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:55,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 11:45:55,739 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)] === [2022-11-20 11:45:55,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:55,739 INFO L85 PathProgramCache]: Analyzing trace with hash 374765924, now seen corresponding path program 2 times [2022-11-20 11:45:55,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:55,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728003657] [2022-11-20 11:45:55,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:55,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:55,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:56,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:56,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:56,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728003657] [2022-11-20 11:45:56,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728003657] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:45:56,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:45:56,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:45:56,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525260431] [2022-11-20 11:45:56,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:45:56,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:45:56,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:56,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:45:56,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:45:56,012 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) [2022-11-20 11:45:56,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:56,932 INFO L93 Difference]: Finished difference Result 13645 states and 43075 transitions. [2022-11-20 11:45:56,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:45:56,933 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 [2022-11-20 11:45:56,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:56,980 INFO L225 Difference]: With dead ends: 13645 [2022-11-20 11:45:56,980 INFO L226 Difference]: Without dead ends: 13645 [2022-11-20 11:45:56,981 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 [2022-11-20 11:45:56,981 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, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:56,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 77 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 11:45:57,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13645 states. [2022-11-20 11:45:57,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13645 to 9314. [2022-11-20 11:45:57,192 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) [2022-11-20 11:45:57,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9314 states to 9314 states and 28987 transitions. [2022-11-20 11:45:57,221 INFO L78 Accepts]: Start accepts. Automaton has 9314 states and 28987 transitions. Word has length 8 [2022-11-20 11:45:57,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:57,221 INFO L495 AbstractCegarLoop]: Abstraction has 9314 states and 28987 transitions. [2022-11-20 11:45:57,221 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) [2022-11-20 11:45:57,221 INFO L276 IsEmpty]: Start isEmpty. Operand 9314 states and 28987 transitions. [2022-11-20 11:45:57,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 11:45:57,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:57,222 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:57,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 11:45:57,222 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)] === [2022-11-20 11:45:57,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:57,223 INFO L85 PathProgramCache]: Analyzing trace with hash 371571884, now seen corresponding path program 1 times [2022-11-20 11:45:57,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:57,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11576281] [2022-11-20 11:45:57,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:57,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:57,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:57,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:57,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11576281] [2022-11-20 11:45:57,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11576281] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:45:57,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:45:57,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:45:57,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399388509] [2022-11-20 11:45:57,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:45:57,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:45:57,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:57,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:45:57,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:45:57,477 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) [2022-11-20 11:45:58,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:45:58,719 INFO L93 Difference]: Finished difference Result 8621 states and 25957 transitions. [2022-11-20 11:45:58,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:45:58,719 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 [2022-11-20 11:45:58,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:45:58,744 INFO L225 Difference]: With dead ends: 8621 [2022-11-20 11:45:58,744 INFO L226 Difference]: Without dead ends: 8621 [2022-11-20 11:45:58,744 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 [2022-11-20 11:45:58,745 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 318 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s 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, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:45:58,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 145 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 11:45:58,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8621 states. [2022-11-20 11:45:59,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8621 to 7242. [2022-11-20 11:45:59,117 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) [2022-11-20 11:45:59,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7242 states to 7242 states and 22109 transitions. [2022-11-20 11:45:59,138 INFO L78 Accepts]: Start accepts. Automaton has 7242 states and 22109 transitions. Word has length 8 [2022-11-20 11:45:59,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:45:59,138 INFO L495 AbstractCegarLoop]: Abstraction has 7242 states and 22109 transitions. [2022-11-20 11:45:59,138 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) [2022-11-20 11:45:59,139 INFO L276 IsEmpty]: Start isEmpty. Operand 7242 states and 22109 transitions. [2022-11-20 11:45:59,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:45:59,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:45:59,140 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:45:59,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 11:45:59,140 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)] === [2022-11-20 11:45:59,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:45:59,141 INFO L85 PathProgramCache]: Analyzing trace with hash -643149953, now seen corresponding path program 1 times [2022-11-20 11:45:59,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:45:59,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213070285] [2022-11-20 11:45:59,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:45:59,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:45:59,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:45:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:45:59,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:45:59,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213070285] [2022-11-20 11:45:59,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213070285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:45:59,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:45:59,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 11:45:59,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472913331] [2022-11-20 11:45:59,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:45:59,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:45:59,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:45:59,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:45:59,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:45:59,699 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) [2022-11-20 11:46:01,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:01,543 INFO L93 Difference]: Finished difference Result 10112 states and 31095 transitions. [2022-11-20 11:46:01,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:46:01,544 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 [2022-11-20 11:46:01,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:01,574 INFO L225 Difference]: With dead ends: 10112 [2022-11-20 11:46:01,574 INFO L226 Difference]: Without dead ends: 10112 [2022-11-20 11:46:01,575 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 [2022-11-20 11:46:01,575 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 384 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 1372 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:01,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 229 Invalid, 1381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1372 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-20 11:46:01,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10112 states. [2022-11-20 11:46:01,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10112 to 9065. [2022-11-20 11:46:01,754 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) [2022-11-20 11:46:01,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9065 states to 9065 states and 28051 transitions. [2022-11-20 11:46:01,791 INFO L78 Accepts]: Start accepts. Automaton has 9065 states and 28051 transitions. Word has length 10 [2022-11-20 11:46:01,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:01,791 INFO L495 AbstractCegarLoop]: Abstraction has 9065 states and 28051 transitions. [2022-11-20 11:46:01,791 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) [2022-11-20 11:46:01,791 INFO L276 IsEmpty]: Start isEmpty. Operand 9065 states and 28051 transitions. [2022-11-20 11:46:01,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:46:01,792 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:01,792 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:01,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 11:46:01,793 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)] === [2022-11-20 11:46:01,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:01,794 INFO L85 PathProgramCache]: Analyzing trace with hash 591629826, now seen corresponding path program 1 times [2022-11-20 11:46:01,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:01,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871158888] [2022-11-20 11:46:01,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:01,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:01,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:02,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:02,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:02,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871158888] [2022-11-20 11:46:02,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871158888] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:02,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:02,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 11:46:02,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307870530] [2022-11-20 11:46:02,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:02,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:46:02,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:02,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:46:02,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:46:02,619 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) [2022-11-20 11:46:04,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:04,921 INFO L93 Difference]: Finished difference Result 10859 states and 33410 transitions. [2022-11-20 11:46:04,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:46:04,922 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 [2022-11-20 11:46:04,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:04,963 INFO L225 Difference]: With dead ends: 10859 [2022-11-20 11:46:04,963 INFO L226 Difference]: Without dead ends: 10859 [2022-11-20 11:46:04,963 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 [2022-11-20 11:46:04,964 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, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:04,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 251 Invalid, 1756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1748 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-20 11:46:04,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10859 states. [2022-11-20 11:46:05,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10859 to 10216. [2022-11-20 11:46:05,237 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) [2022-11-20 11:46:05,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 31729 transitions. [2022-11-20 11:46:05,284 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 31729 transitions. Word has length 10 [2022-11-20 11:46:05,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:05,284 INFO L495 AbstractCegarLoop]: Abstraction has 10216 states and 31729 transitions. [2022-11-20 11:46:05,284 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) [2022-11-20 11:46:05,284 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 31729 transitions. [2022-11-20 11:46:05,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:46:05,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:05,285 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:05,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 11:46:05,286 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)] === [2022-11-20 11:46:05,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:05,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1537206387, now seen corresponding path program 1 times [2022-11-20 11:46:05,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:05,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896837663] [2022-11-20 11:46:05,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:05,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:05,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:06,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:06,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:06,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896837663] [2022-11-20 11:46:06,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896837663] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:06,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:06,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 11:46:06,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119596058] [2022-11-20 11:46:06,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:06,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 11:46:06,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:06,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 11:46:06,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:46:06,265 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) [2022-11-20 11:46:08,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:08,145 INFO L93 Difference]: Finished difference Result 12746 states and 39699 transitions. [2022-11-20 11:46:08,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 11:46:08,146 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 [2022-11-20 11:46:08,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:08,186 INFO L225 Difference]: With dead ends: 12746 [2022-11-20 11:46:08,187 INFO L226 Difference]: Without dead ends: 12746 [2022-11-20 11:46:08,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:46:08,192 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 352 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 1435 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:08,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 144 Invalid, 1457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1435 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-20 11:46:08,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12746 states. [2022-11-20 11:46:08,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12746 to 9970. [2022-11-20 11:46:08,385 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) [2022-11-20 11:46:08,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9970 states to 9970 states and 30835 transitions. [2022-11-20 11:46:08,416 INFO L78 Accepts]: Start accepts. Automaton has 9970 states and 30835 transitions. Word has length 11 [2022-11-20 11:46:08,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:08,416 INFO L495 AbstractCegarLoop]: Abstraction has 9970 states and 30835 transitions. [2022-11-20 11:46:08,416 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) [2022-11-20 11:46:08,416 INFO L276 IsEmpty]: Start isEmpty. Operand 9970 states and 30835 transitions. [2022-11-20 11:46:08,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 11:46:08,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:08,417 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:08,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 11:46:08,418 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)] === [2022-11-20 11:46:08,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:08,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1160663042, now seen corresponding path program 1 times [2022-11-20 11:46:08,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:08,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217351110] [2022-11-20 11:46:08,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:08,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:08,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:09,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:09,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:09,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217351110] [2022-11-20 11:46:09,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217351110] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:09,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:09,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 11:46:09,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825345247] [2022-11-20 11:46:09,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:09,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:46:09,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:09,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:46:09,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:46:09,184 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) [2022-11-20 11:46:11,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:11,105 INFO L93 Difference]: Finished difference Result 12321 states and 38156 transitions. [2022-11-20 11:46:11,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 11:46:11,105 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 [2022-11-20 11:46:11,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:11,145 INFO L225 Difference]: With dead ends: 12321 [2022-11-20 11:46:11,145 INFO L226 Difference]: Without dead ends: 12321 [2022-11-20 11:46:11,145 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 [2022-11-20 11:46:11,148 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 455 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s 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, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:11,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 136 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1483 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-20 11:46:11,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12321 states. [2022-11-20 11:46:11,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12321 to 9722. [2022-11-20 11:46:11,441 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) [2022-11-20 11:46:11,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9722 states to 9722 states and 29982 transitions. [2022-11-20 11:46:11,472 INFO L78 Accepts]: Start accepts. Automaton has 9722 states and 29982 transitions. Word has length 11 [2022-11-20 11:46:11,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:11,472 INFO L495 AbstractCegarLoop]: Abstraction has 9722 states and 29982 transitions. [2022-11-20 11:46:11,472 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) [2022-11-20 11:46:11,472 INFO L276 IsEmpty]: Start isEmpty. Operand 9722 states and 29982 transitions. [2022-11-20 11:46:11,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:46:11,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:11,473 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:11,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 11:46:11,474 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)] === [2022-11-20 11:46:11,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:11,474 INFO L85 PathProgramCache]: Analyzing trace with hash -812060561, now seen corresponding path program 1 times [2022-11-20 11:46:11,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:11,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809218165] [2022-11-20 11:46:11,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:11,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:11,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:11,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:11,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:11,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809218165] [2022-11-20 11:46:11,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809218165] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:11,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:11,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:46:11,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781612425] [2022-11-20 11:46:11,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:11,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:46:11,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:11,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:46:11,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:46:11,674 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) [2022-11-20 11:46:12,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:12,130 INFO L93 Difference]: Finished difference Result 9050 states and 27855 transitions. [2022-11-20 11:46:12,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:46:12,131 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 [2022-11-20 11:46:12,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:12,169 INFO L225 Difference]: With dead ends: 9050 [2022-11-20 11:46:12,169 INFO L226 Difference]: Without dead ends: 9050 [2022-11-20 11:46:12,169 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 [2022-11-20 11:46:12,170 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 [2022-11-20 11:46:12,170 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] [2022-11-20 11:46:12,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9050 states. [2022-11-20 11:46:12,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9050 to 9050. [2022-11-20 11:46:12,348 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) [2022-11-20 11:46:12,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9050 states to 9050 states and 27855 transitions. [2022-11-20 11:46:12,375 INFO L78 Accepts]: Start accepts. Automaton has 9050 states and 27855 transitions. Word has length 13 [2022-11-20 11:46:12,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:12,375 INFO L495 AbstractCegarLoop]: Abstraction has 9050 states and 27855 transitions. [2022-11-20 11:46:12,375 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) [2022-11-20 11:46:12,375 INFO L276 IsEmpty]: Start isEmpty. Operand 9050 states and 27855 transitions. [2022-11-20 11:46:12,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:46:12,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:12,376 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:12,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 11:46:12,377 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)] === [2022-11-20 11:46:12,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:12,378 INFO L85 PathProgramCache]: Analyzing trace with hash -812060560, now seen corresponding path program 1 times [2022-11-20 11:46:12,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:12,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594952394] [2022-11-20 11:46:12,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:12,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:12,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:12,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:12,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:12,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594952394] [2022-11-20 11:46:12,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594952394] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:12,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:12,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:46:12,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369640449] [2022-11-20 11:46:12,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:12,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:46:12,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:12,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:46:12,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:46:12,487 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) [2022-11-20 11:46:12,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:12,840 INFO L93 Difference]: Finished difference Result 8602 states and 26437 transitions. [2022-11-20 11:46:12,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:46:12,841 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 [2022-11-20 11:46:12,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:12,868 INFO L225 Difference]: With dead ends: 8602 [2022-11-20 11:46:12,868 INFO L226 Difference]: Without dead ends: 8602 [2022-11-20 11:46:12,868 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 [2022-11-20 11:46:12,868 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 [2022-11-20 11:46:12,869 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] [2022-11-20 11:46:12,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8602 states. [2022-11-20 11:46:13,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8602 to 8602. [2022-11-20 11:46:13,012 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) [2022-11-20 11:46:13,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8602 states to 8602 states and 26437 transitions. [2022-11-20 11:46:13,038 INFO L78 Accepts]: Start accepts. Automaton has 8602 states and 26437 transitions. Word has length 13 [2022-11-20 11:46:13,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:13,038 INFO L495 AbstractCegarLoop]: Abstraction has 8602 states and 26437 transitions. [2022-11-20 11:46:13,038 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) [2022-11-20 11:46:13,038 INFO L276 IsEmpty]: Start isEmpty. Operand 8602 states and 26437 transitions. [2022-11-20 11:46:13,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:46:13,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:13,040 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:13,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-20 11:46:13,040 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)] === [2022-11-20 11:46:13,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:13,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1840336517, now seen corresponding path program 1 times [2022-11-20 11:46:13,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:13,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117434171] [2022-11-20 11:46:13,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:13,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:13,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:13,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:13,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:13,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117434171] [2022-11-20 11:46:13,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117434171] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:46:13,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860816276] [2022-11-20 11:46:13,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:13,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:13,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:46:13,134 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:46:13,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:46:13,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:13,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 11:46:13,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:13,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:13,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:46:13,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:13,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860816276] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:46:13,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:46:13,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-20 11:46:13,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817849816] [2022-11-20 11:46:13,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:46:13,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:46:13,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:13,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:46:13,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:46:13,466 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) [2022-11-20 11:46:14,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:14,277 INFO L93 Difference]: Finished difference Result 22644 states and 69167 transitions. [2022-11-20 11:46:14,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:46:14,278 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 [2022-11-20 11:46:14,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:14,348 INFO L225 Difference]: With dead ends: 22644 [2022-11-20 11:46:14,348 INFO L226 Difference]: Without dead ends: 22644 [2022-11-20 11:46:14,349 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 [2022-11-20 11:46:14,349 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 373 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:14,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 288 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:46:14,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22644 states. [2022-11-20 11:46:14,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22644 to 20250. [2022-11-20 11:46:14,745 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) [2022-11-20 11:46:14,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20250 states to 20250 states and 65225 transitions. [2022-11-20 11:46:14,812 INFO L78 Accepts]: Start accepts. Automaton has 20250 states and 65225 transitions. Word has length 14 [2022-11-20 11:46:14,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:14,812 INFO L495 AbstractCegarLoop]: Abstraction has 20250 states and 65225 transitions. [2022-11-20 11:46:14,813 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) [2022-11-20 11:46:14,813 INFO L276 IsEmpty]: Start isEmpty. Operand 20250 states and 65225 transitions. [2022-11-20 11:46:14,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-20 11:46:14,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:14,814 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:14,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:46:15,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:15,015 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)] === [2022-11-20 11:46:15,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:15,016 INFO L85 PathProgramCache]: Analyzing trace with hash 595926515, now seen corresponding path program 1 times [2022-11-20 11:46:15,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:15,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794884098] [2022-11-20 11:46:15,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:15,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:15,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:15,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:15,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:15,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794884098] [2022-11-20 11:46:15,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794884098] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:15,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:15,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:46:15,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238953310] [2022-11-20 11:46:15,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:15,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:46:15,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:15,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:46:15,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:46:15,124 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) [2022-11-20 11:46:15,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:15,480 INFO L93 Difference]: Finished difference Result 29288 states and 96002 transitions. [2022-11-20 11:46:15,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:46:15,481 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 [2022-11-20 11:46:15,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:15,590 INFO L225 Difference]: With dead ends: 29288 [2022-11-20 11:46:15,590 INFO L226 Difference]: Without dead ends: 29288 [2022-11-20 11:46:15,591 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 [2022-11-20 11:46:15,591 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 [2022-11-20 11:46:15,592 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] [2022-11-20 11:46:15,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29288 states. [2022-11-20 11:46:16,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29288 to 20918. [2022-11-20 11:46:16,255 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) [2022-11-20 11:46:16,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20918 states to 20918 states and 68316 transitions. [2022-11-20 11:46:16,325 INFO L78 Accepts]: Start accepts. Automaton has 20918 states and 68316 transitions. Word has length 14 [2022-11-20 11:46:16,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:16,325 INFO L495 AbstractCegarLoop]: Abstraction has 20918 states and 68316 transitions. [2022-11-20 11:46:16,325 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) [2022-11-20 11:46:16,325 INFO L276 IsEmpty]: Start isEmpty. Operand 20918 states and 68316 transitions. [2022-11-20 11:46:16,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:46:16,327 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:16,327 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:16,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-20 11:46:16,327 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)] === [2022-11-20 11:46:16,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:16,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1293901999, now seen corresponding path program 1 times [2022-11-20 11:46:16,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:16,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938789542] [2022-11-20 11:46:16,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:16,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:16,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:16,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:16,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:16,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938789542] [2022-11-20 11:46:16,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938789542] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:16,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:16,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:46:16,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483214812] [2022-11-20 11:46:16,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:16,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:46:16,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:16,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:46:16,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:46:16,804 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) [2022-11-20 11:46:17,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:17,417 INFO L93 Difference]: Finished difference Result 20918 states and 68316 transitions. [2022-11-20 11:46:17,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:46:17,418 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 [2022-11-20 11:46:17,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:17,519 INFO L225 Difference]: With dead ends: 20918 [2022-11-20 11:46:17,520 INFO L226 Difference]: Without dead ends: 20918 [2022-11-20 11:46:17,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:46:17,521 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 [2022-11-20 11:46:17,521 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] [2022-11-20 11:46:17,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20918 states. [2022-11-20 11:46:18,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20918 to 20917. [2022-11-20 11:46:18,278 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) [2022-11-20 11:46:18,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20917 states to 20917 states and 68314 transitions. [2022-11-20 11:46:18,348 INFO L78 Accepts]: Start accepts. Automaton has 20917 states and 68314 transitions. Word has length 15 [2022-11-20 11:46:18,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:18,348 INFO L495 AbstractCegarLoop]: Abstraction has 20917 states and 68314 transitions. [2022-11-20 11:46:18,348 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) [2022-11-20 11:46:18,349 INFO L276 IsEmpty]: Start isEmpty. Operand 20917 states and 68314 transitions. [2022-11-20 11:46:18,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:46:18,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:18,351 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:18,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-20 11:46:18,352 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)] === [2022-11-20 11:46:18,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:18,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1188295912, now seen corresponding path program 1 times [2022-11-20 11:46:18,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:18,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494018385] [2022-11-20 11:46:18,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:18,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:18,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:18,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:18,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494018385] [2022-11-20 11:46:18,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494018385] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:18,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:18,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 11:46:18,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765902805] [2022-11-20 11:46:18,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:18,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:46:18,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:18,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:46:18,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:46:18,465 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) [2022-11-20 11:46:18,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:18,697 INFO L93 Difference]: Finished difference Result 7779 states and 21748 transitions. [2022-11-20 11:46:18,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:46:18,698 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 [2022-11-20 11:46:18,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:18,725 INFO L225 Difference]: With dead ends: 7779 [2022-11-20 11:46:18,726 INFO L226 Difference]: Without dead ends: 7779 [2022-11-20 11:46:18,727 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 [2022-11-20 11:46:18,728 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 79 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-11-20 11:46:18,729 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] [2022-11-20 11:46:18,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7779 states. [2022-11-20 11:46:18,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7779 to 7545. [2022-11-20 11:46:18,900 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) [2022-11-20 11:46:18,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7545 states to 7545 states and 21527 transitions. [2022-11-20 11:46:18,928 INFO L78 Accepts]: Start accepts. Automaton has 7545 states and 21527 transitions. Word has length 16 [2022-11-20 11:46:18,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:18,929 INFO L495 AbstractCegarLoop]: Abstraction has 7545 states and 21527 transitions. [2022-11-20 11:46:18,929 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) [2022-11-20 11:46:18,929 INFO L276 IsEmpty]: Start isEmpty. Operand 7545 states and 21527 transitions. [2022-11-20 11:46:18,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:46:18,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:18,933 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:18,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-20 11:46:18,934 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)] === [2022-11-20 11:46:18,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:18,934 INFO L85 PathProgramCache]: Analyzing trace with hash -2079789687, now seen corresponding path program 1 times [2022-11-20 11:46:18,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:18,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76922563] [2022-11-20 11:46:18,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:18,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:18,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:19,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:19,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:19,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76922563] [2022-11-20 11:46:19,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76922563] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:19,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:19,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:46:19,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891892072] [2022-11-20 11:46:19,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:19,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:46:19,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:19,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:46:19,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:46:19,460 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) [2022-11-20 11:46:20,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:20,175 INFO L93 Difference]: Finished difference Result 8035 states and 23071 transitions. [2022-11-20 11:46:20,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:46:20,175 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 [2022-11-20 11:46:20,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:20,195 INFO L225 Difference]: With dead ends: 8035 [2022-11-20 11:46:20,196 INFO L226 Difference]: Without dead ends: 8035 [2022-11-20 11:46:20,196 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 [2022-11-20 11:46:20,197 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, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:46:20,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 116 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:46:20,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8035 states. [2022-11-20 11:46:20,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8035 to 7869. [2022-11-20 11:46:20,524 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) [2022-11-20 11:46:20,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7869 states to 7869 states and 22478 transitions. [2022-11-20 11:46:20,544 INFO L78 Accepts]: Start accepts. Automaton has 7869 states and 22478 transitions. Word has length 16 [2022-11-20 11:46:20,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:20,544 INFO L495 AbstractCegarLoop]: Abstraction has 7869 states and 22478 transitions. [2022-11-20 11:46:20,545 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) [2022-11-20 11:46:20,545 INFO L276 IsEmpty]: Start isEmpty. Operand 7869 states and 22478 transitions. [2022-11-20 11:46:20,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:46:20,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:20,548 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:20,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-20 11:46:20,548 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)] === [2022-11-20 11:46:20,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:20,548 INFO L85 PathProgramCache]: Analyzing trace with hash -382544743, now seen corresponding path program 2 times [2022-11-20 11:46:20,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:20,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139876128] [2022-11-20 11:46:20,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:20,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:20,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:21,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:21,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:21,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139876128] [2022-11-20 11:46:21,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139876128] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:21,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:21,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:46:21,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328998431] [2022-11-20 11:46:21,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:21,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:46:21,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:21,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:46:21,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:46:21,044 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) [2022-11-20 11:46:21,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:21,843 INFO L93 Difference]: Finished difference Result 8089 states and 23225 transitions. [2022-11-20 11:46:21,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:46:21,844 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 [2022-11-20 11:46:21,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:21,872 INFO L225 Difference]: With dead ends: 8089 [2022-11-20 11:46:21,872 INFO L226 Difference]: Without dead ends: 8089 [2022-11-20 11:46:21,873 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 [2022-11-20 11:46:21,874 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 177 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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 [2022-11-20 11:46:21,874 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] [2022-11-20 11:46:21,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8089 states. [2022-11-20 11:46:22,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8089 to 7572. [2022-11-20 11:46:22,021 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) [2022-11-20 11:46:22,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7572 states to 7572 states and 21604 transitions. [2022-11-20 11:46:22,040 INFO L78 Accepts]: Start accepts. Automaton has 7572 states and 21604 transitions. Word has length 16 [2022-11-20 11:46:22,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:22,040 INFO L495 AbstractCegarLoop]: Abstraction has 7572 states and 21604 transitions. [2022-11-20 11:46:22,041 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) [2022-11-20 11:46:22,041 INFO L276 IsEmpty]: Start isEmpty. Operand 7572 states and 21604 transitions. [2022-11-20 11:46:22,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:46:22,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:22,043 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:22,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-20 11:46:22,043 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)] === [2022-11-20 11:46:22,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:22,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1456256853, now seen corresponding path program 3 times [2022-11-20 11:46:22,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:22,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513165734] [2022-11-20 11:46:22,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:22,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:22,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:22,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:22,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:22,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513165734] [2022-11-20 11:46:22,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513165734] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:22,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:22,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:46:22,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015598769] [2022-11-20 11:46:22,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:22,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:46:22,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:22,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:46:22,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:46:22,526 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) [2022-11-20 11:46:23,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:23,253 INFO L93 Difference]: Finished difference Result 7603 states and 21704 transitions. [2022-11-20 11:46:23,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:46:23,254 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 [2022-11-20 11:46:23,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:23,283 INFO L225 Difference]: With dead ends: 7603 [2022-11-20 11:46:23,284 INFO L226 Difference]: Without dead ends: 7603 [2022-11-20 11:46:23,284 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 [2022-11-20 11:46:23,285 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 140 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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 [2022-11-20 11:46:23,285 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] [2022-11-20 11:46:23,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7603 states. [2022-11-20 11:46:23,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7603 to 7528. [2022-11-20 11:46:23,557 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) [2022-11-20 11:46:23,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7528 states to 7528 states and 21476 transitions. [2022-11-20 11:46:23,586 INFO L78 Accepts]: Start accepts. Automaton has 7528 states and 21476 transitions. Word has length 16 [2022-11-20 11:46:23,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:23,586 INFO L495 AbstractCegarLoop]: Abstraction has 7528 states and 21476 transitions. [2022-11-20 11:46:23,587 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) [2022-11-20 11:46:23,587 INFO L276 IsEmpty]: Start isEmpty. Operand 7528 states and 21476 transitions. [2022-11-20 11:46:23,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:46:23,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:23,589 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:23,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-20 11:46:23,589 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)] === [2022-11-20 11:46:23,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:23,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1456257370, now seen corresponding path program 1 times [2022-11-20 11:46:23,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:23,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655590650] [2022-11-20 11:46:23,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:23,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:23,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:23,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:23,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:23,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655590650] [2022-11-20 11:46:23,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655590650] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:46:23,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:46:23,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:46:23,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382701829] [2022-11-20 11:46:23,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:46:23,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:46:23,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:46:23,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:46:23,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:46:23,637 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) [2022-11-20 11:46:23,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:46:23,895 INFO L93 Difference]: Finished difference Result 7492 states and 21550 transitions. [2022-11-20 11:46:23,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:46:23,896 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 [2022-11-20 11:46:23,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:46:23,922 INFO L225 Difference]: With dead ends: 7492 [2022-11-20 11:46:23,922 INFO L226 Difference]: Without dead ends: 7492 [2022-11-20 11:46:23,923 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 [2022-11-20 11:46:23,923 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 [2022-11-20 11:46:23,924 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] [2022-11-20 11:46:23,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7492 states. [2022-11-20 11:46:24,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7492 to 7315. [2022-11-20 11:46:24,088 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) [2022-11-20 11:46:24,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7315 states to 7315 states and 20877 transitions. [2022-11-20 11:46:24,115 INFO L78 Accepts]: Start accepts. Automaton has 7315 states and 20877 transitions. Word has length 16 [2022-11-20 11:46:24,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:46:24,116 INFO L495 AbstractCegarLoop]: Abstraction has 7315 states and 20877 transitions. [2022-11-20 11:46:24,116 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) [2022-11-20 11:46:24,116 INFO L276 IsEmpty]: Start isEmpty. Operand 7315 states and 20877 transitions. [2022-11-20 11:46:24,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 11:46:24,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:46:24,119 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:46:24,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-20 11:46:24,119 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)] === [2022-11-20 11:46:24,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:46:24,120 INFO L85 PathProgramCache]: Analyzing trace with hash -2118675380, now seen corresponding path program 1 times [2022-11-20 11:46:24,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:46:24,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129081493] [2022-11-20 11:46:24,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:24,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:46:24,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:25,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:25,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:46:25,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129081493] [2022-11-20 11:46:25,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129081493] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:46:25,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144556147] [2022-11-20 11:46:25,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:46:25,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:46:25,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:46:25,255 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:46:25,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:46:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:46:25,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-20 11:46:25,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:46:25,559 INFO L321 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2022-11-20 11:46:25,560 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 [2022-11-20 11:46:25,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:46:25,575 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 [2022-11-20 11:46:25,586 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 [2022-11-20 11:46:25,726 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 [2022-11-20 11:46:26,009 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 [2022-11-20 11:46:26,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:46:26,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:46:26,277 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 11:46:26,278 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 [2022-11-20 11:46:26,484 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 [2022-11-20 11:46:26,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:46:26,821 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 [2022-11-20 11:46:26,874 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:46:26,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:46:27,033 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 [2022-11-20 11:46:53,219 WARN L233 SmtUtils]: Spent 10.13s on a formula simplification. DAG size of input: 81 DAG size of output: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:46:59,781 WARN L233 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:47:04,800 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:47:04,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144556147] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:47:04,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:47:04,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 14] total 39 [2022-11-20 11:47:04,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568039555] [2022-11-20 11:47:04,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:47:04,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-20 11:47:04,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:47:04,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-20 11:47:04,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1436, Unknown=5, NotChecked=0, Total=1640 [2022-11-20 11:47:04,803 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) [2022-11-20 11:47:55,958 WARN L233 SmtUtils]: Spent 15.35s on a formula simplification. DAG size of input: 102 DAG size of output: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:48:28,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:28,149 INFO L93 Difference]: Finished difference Result 11041 states and 31623 transitions. [2022-11-20 11:48:28,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-20 11:48:28,150 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 [2022-11-20 11:48:28,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:28,178 INFO L225 Difference]: With dead ends: 11041 [2022-11-20 11:48:28,178 INFO L226 Difference]: Without dead ends: 11041 [2022-11-20 11:48:28,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 16 SyntacticMatches, 14 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2622 ImplicationChecksByTransitivity, 115.7s TimeCoverageRelationStatistics Valid=1081, Invalid=5539, Unknown=22, NotChecked=0, Total=6642 [2022-11-20 11:48:28,181 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 826 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 3109 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 7098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 3109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3967 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:28,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [826 Valid, 760 Invalid, 7098 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [22 Valid, 3109 Invalid, 0 Unknown, 3967 Unchecked, 3.9s Time] [2022-11-20 11:48:28,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11041 states. [2022-11-20 11:48:28,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11041 to 9895. [2022-11-20 11:48:28,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9895 states, 9746 states have (on average 2.937205007182434) internal successors, (28626), 9894 states have internal predecessors, (28626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:28,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9895 states to 9895 states and 28626 transitions. [2022-11-20 11:48:28,493 INFO L78 Accepts]: Start accepts. Automaton has 9895 states and 28626 transitions. Word has length 18 [2022-11-20 11:48:28,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:28,494 INFO L495 AbstractCegarLoop]: Abstraction has 9895 states and 28626 transitions. [2022-11-20 11:48:28,494 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) [2022-11-20 11:48:28,494 INFO L276 IsEmpty]: Start isEmpty. Operand 9895 states and 28626 transitions. [2022-11-20 11:48:28,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 11:48:28,498 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:28,498 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:28,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:48:28,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:28,705 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)] === [2022-11-20 11:48:28,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:28,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1057298436, now seen corresponding path program 1 times [2022-11-20 11:48:28,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:48:28,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81726280] [2022-11-20 11:48:28,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:28,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:48:28,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:29,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:48:29,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:48:29,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81726280] [2022-11-20 11:48:29,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81726280] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:48:29,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235096187] [2022-11-20 11:48:29,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:29,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:48:29,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:48:29,803 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:48:29,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:48:30,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:30,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-20 11:48:30,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:48:30,270 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-20 11:48:30,271 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 [2022-11-20 11:48:30,552 INFO L321 Elim1Store]: treesize reduction 14, result has 63.2 percent of original size [2022-11-20 11:48:30,553 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 [2022-11-20 11:48:30,878 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 [2022-11-20 11:48:30,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:48:30,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:48:31,061 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 [2022-11-20 11:48:33,250 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:48:33,251 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 [2022-11-20 11:48:35,505 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 [2022-11-20 11:48:35,514 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 [2022-11-20 11:48:35,538 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:48:35,539 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 [2022-11-20 11:48:36,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:48:36,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235096187] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:48:36,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:48:36,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 12] total 32 [2022-11-20 11:48:36,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246052697] [2022-11-20 11:48:36,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:48:36,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 11:48:36,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:48:36,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 11:48:36,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:48:36,122 INFO L87 Difference]: Start difference. First operand 9895 states and 28626 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) [2022-11-20 11:48:49,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:49,102 INFO L93 Difference]: Finished difference Result 21328 states and 58580 transitions. [2022-11-20 11:48:49,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 11:48:49,102 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 [2022-11-20 11:48:49,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:49,163 INFO L225 Difference]: With dead ends: 21328 [2022-11-20 11:48:49,163 INFO L226 Difference]: Without dead ends: 21328 [2022-11-20 11:48:49,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 19 SyntacticMatches, 14 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=621, Invalid=2685, Unknown=0, NotChecked=0, Total=3306 [2022-11-20 11:48:49,164 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 2731 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 7165 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2731 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 7979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 7165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 754 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:49,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2731 Valid, 911 Invalid, 7979 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [60 Valid, 7165 Invalid, 0 Unknown, 754 Unchecked, 9.4s Time] [2022-11-20 11:48:49,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21328 states. [2022-11-20 11:48:49,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21328 to 15277. [2022-11-20 11:48:49,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15277 states, 15107 states have (on average 2.887866551929569) internal successors, (43627), 15276 states have internal predecessors, (43627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:49,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15277 states to 15277 states and 43627 transitions. [2022-11-20 11:48:49,637 INFO L78 Accepts]: Start accepts. Automaton has 15277 states and 43627 transitions. Word has length 18 [2022-11-20 11:48:49,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:49,637 INFO L495 AbstractCegarLoop]: Abstraction has 15277 states and 43627 transitions. [2022-11-20 11:48:49,637 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) [2022-11-20 11:48:49,637 INFO L276 IsEmpty]: Start isEmpty. Operand 15277 states and 43627 transitions. [2022-11-20 11:48:49,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 11:48:49,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:49,640 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:49,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:48:49,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-20 11:48:49,847 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)] === [2022-11-20 11:48:49,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:49,848 INFO L85 PathProgramCache]: Analyzing trace with hash -696055398, now seen corresponding path program 1 times [2022-11-20 11:48:49,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:48:49,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856056109] [2022-11-20 11:48:49,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:49,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:48:49,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:49,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:48:49,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:48:49,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856056109] [2022-11-20 11:48:49,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856056109] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:48:49,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:48:49,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:48:49,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670210084] [2022-11-20 11:48:49,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:48:49,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:48:49,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:48:49,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:48:49,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:48:49,957 INFO L87 Difference]: Start difference. First operand 15277 states and 43627 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) [2022-11-20 11:48:50,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:50,315 INFO L93 Difference]: Finished difference Result 14877 states and 42453 transitions. [2022-11-20 11:48:50,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:48:50,316 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 [2022-11-20 11:48:50,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:50,371 INFO L225 Difference]: With dead ends: 14877 [2022-11-20 11:48:50,371 INFO L226 Difference]: Without dead ends: 14877 [2022-11-20 11:48:50,371 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 [2022-11-20 11:48:50,372 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, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:48:50,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 43 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:48:50,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14877 states. [2022-11-20 11:48:50,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14877 to 14877. [2022-11-20 11:48:50,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14877 states, 14716 states have (on average 2.8848192443598806) internal successors, (42453), 14876 states have internal predecessors, (42453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:50,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14877 states to 14877 states and 42453 transitions. [2022-11-20 11:48:50,665 INFO L78 Accepts]: Start accepts. Automaton has 14877 states and 42453 transitions. Word has length 18 [2022-11-20 11:48:50,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:50,665 INFO L495 AbstractCegarLoop]: Abstraction has 14877 states and 42453 transitions. [2022-11-20 11:48:50,665 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) [2022-11-20 11:48:50,665 INFO L276 IsEmpty]: Start isEmpty. Operand 14877 states and 42453 transitions. [2022-11-20 11:48:50,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-20 11:48:50,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:50,668 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:50,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-20 11:48:50,668 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)] === [2022-11-20 11:48:50,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:50,669 INFO L85 PathProgramCache]: Analyzing trace with hash -696055397, now seen corresponding path program 1 times [2022-11-20 11:48:50,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:48:50,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211110948] [2022-11-20 11:48:50,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:50,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:48:50,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:51,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:48:51,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:48:51,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211110948] [2022-11-20 11:48:51,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211110948] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:48:51,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:48:51,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 11:48:51,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910999691] [2022-11-20 11:48:51,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:48:51,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:48:51,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:48:51,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:48:51,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:48:51,188 INFO L87 Difference]: Start difference. First operand 14877 states and 42453 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) [2022-11-20 11:48:51,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:48:51,794 INFO L93 Difference]: Finished difference Result 14455 states and 41388 transitions. [2022-11-20 11:48:51,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:48:51,795 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 [2022-11-20 11:48:51,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:48:51,858 INFO L225 Difference]: With dead ends: 14455 [2022-11-20 11:48:51,859 INFO L226 Difference]: Without dead ends: 14455 [2022-11-20 11:48:51,859 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 [2022-11-20 11:48:51,860 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 [2022-11-20 11:48:51,860 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] [2022-11-20 11:48:51,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14455 states. [2022-11-20 11:48:52,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14455 to 14455. [2022-11-20 11:48:52,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14455 states, 14295 states have (on average 2.895278069254984) internal successors, (41388), 14454 states have internal predecessors, (41388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:48:52,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14455 states to 14455 states and 41388 transitions. [2022-11-20 11:48:52,502 INFO L78 Accepts]: Start accepts. Automaton has 14455 states and 41388 transitions. Word has length 18 [2022-11-20 11:48:52,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:48:52,502 INFO L495 AbstractCegarLoop]: Abstraction has 14455 states and 41388 transitions. [2022-11-20 11:48:52,503 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) [2022-11-20 11:48:52,503 INFO L276 IsEmpty]: Start isEmpty. Operand 14455 states and 41388 transitions. [2022-11-20 11:48:52,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 11:48:52,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:48:52,506 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:48:52,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-20 11:48:52,507 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)] === [2022-11-20 11:48:52,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:48:52,507 INFO L85 PathProgramCache]: Analyzing trace with hash -948496301, now seen corresponding path program 1 times [2022-11-20 11:48:52,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:48:52,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442727084] [2022-11-20 11:48:52,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:48:52,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:48:52,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:48:53,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:48:53,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:48:53,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442727084] [2022-11-20 11:48:53,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442727084] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:48:53,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:48:53,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-20 11:48:53,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060083636] [2022-11-20 11:48:53,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:48:53,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:48:53,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:48:53,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:48:53,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:48:53,846 INFO L87 Difference]: Start difference. First operand 14455 states and 41388 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) [2022-11-20 11:49:01,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:49:01,414 INFO L93 Difference]: Finished difference Result 25511 states and 70735 transitions. [2022-11-20 11:49:01,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 11:49:01,414 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 [2022-11-20 11:49:01,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:49:01,492 INFO L225 Difference]: With dead ends: 25511 [2022-11-20 11:49:01,492 INFO L226 Difference]: Without dead ends: 25511 [2022-11-20 11:49:01,492 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 [2022-11-20 11:49:01,493 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 765 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 5095 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 5104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 5095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:49:01,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [765 Valid, 605 Invalid, 5104 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [9 Valid, 5095 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-11-20 11:49:01,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25511 states. [2022-11-20 11:49:01,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25511 to 19677. [2022-11-20 11:49:01,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19677 states, 19517 states have (on average 2.8779525541835325) internal successors, (56169), 19676 states have internal predecessors, (56169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:01,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19677 states to 19677 states and 56169 transitions. [2022-11-20 11:49:01,965 INFO L78 Accepts]: Start accepts. Automaton has 19677 states and 56169 transitions. Word has length 19 [2022-11-20 11:49:01,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:49:01,965 INFO L495 AbstractCegarLoop]: Abstraction has 19677 states and 56169 transitions. [2022-11-20 11:49:01,966 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) [2022-11-20 11:49:01,966 INFO L276 IsEmpty]: Start isEmpty. Operand 19677 states and 56169 transitions. [2022-11-20 11:49:01,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 11:49:01,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:49:01,969 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:01,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-20 11:49:01,970 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)] === [2022-11-20 11:49:01,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:01,970 INFO L85 PathProgramCache]: Analyzing trace with hash 551555358, now seen corresponding path program 1 times [2022-11-20 11:49:01,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:49:01,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241313877] [2022-11-20 11:49:01,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:01,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:49:02,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:03,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:49:03,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:49:03,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241313877] [2022-11-20 11:49:03,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241313877] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:49:03,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:49:03,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-20 11:49:03,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027416982] [2022-11-20 11:49:03,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:49:03,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:49:03,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:49:03,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:49:03,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:49:03,458 INFO L87 Difference]: Start difference. First operand 19677 states and 56169 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) [2022-11-20 11:49:11,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:49:11,141 INFO L93 Difference]: Finished difference Result 23861 states and 66566 transitions. [2022-11-20 11:49:11,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 11:49:11,141 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 [2022-11-20 11:49:11,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:49:11,210 INFO L225 Difference]: With dead ends: 23861 [2022-11-20 11:49:11,210 INFO L226 Difference]: Without dead ends: 23861 [2022-11-20 11:49:11,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2022-11-20 11:49:11,211 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 812 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 5219 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 5225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 5219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:49:11,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [812 Valid, 676 Invalid, 5225 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [6 Valid, 5219 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-11-20 11:49:11,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23861 states. [2022-11-20 11:49:11,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23861 to 21179. [2022-11-20 11:49:11,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21179 states, 21019 states have (on average 2.87144964080118) internal successors, (60355), 21178 states have internal predecessors, (60355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:11,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21179 states to 21179 states and 60355 transitions. [2022-11-20 11:49:11,704 INFO L78 Accepts]: Start accepts. Automaton has 21179 states and 60355 transitions. Word has length 19 [2022-11-20 11:49:11,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:49:11,705 INFO L495 AbstractCegarLoop]: Abstraction has 21179 states and 60355 transitions. [2022-11-20 11:49:11,705 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) [2022-11-20 11:49:11,705 INFO L276 IsEmpty]: Start isEmpty. Operand 21179 states and 60355 transitions. [2022-11-20 11:49:11,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 11:49:11,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:49:11,709 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:11,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-20 11:49:11,709 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)] === [2022-11-20 11:49:11,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:11,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1827420180, now seen corresponding path program 2 times [2022-11-20 11:49:11,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:49:11,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973645986] [2022-11-20 11:49:11,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:11,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:49:11,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:13,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:49:13,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:49:13,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973645986] [2022-11-20 11:49:13,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973645986] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:49:13,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:49:13,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-20 11:49:13,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922383243] [2022-11-20 11:49:13,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:49:13,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:49:13,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:49:13,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:49:13,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:49:13,577 INFO L87 Difference]: Start difference. First operand 21179 states and 60355 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) [2022-11-20 11:49:21,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:49:21,292 INFO L93 Difference]: Finished difference Result 21862 states and 61971 transitions. [2022-11-20 11:49:21,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 11:49:21,292 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 [2022-11-20 11:49:21,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:49:21,357 INFO L225 Difference]: With dead ends: 21862 [2022-11-20 11:49:21,357 INFO L226 Difference]: Without dead ends: 21862 [2022-11-20 11:49:21,358 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 [2022-11-20 11:49:21,358 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 412 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 5168 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 5178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 5168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:49:21,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 428 Invalid, 5178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 5168 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-11-20 11:49:21,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21862 states. [2022-11-20 11:49:21,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21862 to 21108. [2022-11-20 11:49:21,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21108 states, 20948 states have (on average 2.873018903952645) internal successors, (60184), 21107 states have internal predecessors, (60184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:21,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21108 states to 21108 states and 60184 transitions. [2022-11-20 11:49:21,921 INFO L78 Accepts]: Start accepts. Automaton has 21108 states and 60184 transitions. Word has length 19 [2022-11-20 11:49:21,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:49:21,921 INFO L495 AbstractCegarLoop]: Abstraction has 21108 states and 60184 transitions. [2022-11-20 11:49:21,921 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) [2022-11-20 11:49:21,922 INFO L276 IsEmpty]: Start isEmpty. Operand 21108 states and 60184 transitions. [2022-11-20 11:49:21,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 11:49:21,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:49:21,925 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:21,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-20 11:49:21,926 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)] === [2022-11-20 11:49:21,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:21,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1830551820, now seen corresponding path program 1 times [2022-11-20 11:49:21,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:49:21,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402798547] [2022-11-20 11:49:21,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:21,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:49:21,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:23,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:49:23,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:49:23,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402798547] [2022-11-20 11:49:23,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402798547] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:49:23,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435589814] [2022-11-20 11:49:23,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:23,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:49:23,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:49:23,051 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:49:23,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:49:23,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:23,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-20 11:49:23,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:23,619 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-20 11:49:23,620 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 [2022-11-20 11:49:23,963 INFO L321 Elim1Store]: treesize reduction 19, result has 60.4 percent of original size [2022-11-20 11:49:23,963 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 [2022-11-20 11:49:24,293 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 [2022-11-20 11:49:24,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:49:24,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:49:24,529 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 [2022-11-20 11:49:26,700 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:49:26,700 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 [2022-11-20 11:49:28,070 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 [2022-11-20 11:49:28,103 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:49:28,104 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 [2022-11-20 11:49:28,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:49:28,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435589814] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:49:28,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:49:28,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 32 [2022-11-20 11:49:28,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044176165] [2022-11-20 11:49:28,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:49:28,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 11:49:28,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:49:28,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 11:49:28,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:49:28,667 INFO L87 Difference]: Start difference. First operand 21108 states and 60184 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) [2022-11-20 11:49:39,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:49:39,191 INFO L93 Difference]: Finished difference Result 27973 states and 78184 transitions. [2022-11-20 11:49:39,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-20 11:49:39,192 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 [2022-11-20 11:49:39,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:49:39,277 INFO L225 Difference]: With dead ends: 27973 [2022-11-20 11:49:39,277 INFO L226 Difference]: Without dead ends: 27973 [2022-11-20 11:49:39,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=336, Invalid=2114, Unknown=0, NotChecked=0, Total=2450 [2022-11-20 11:49:39,279 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 910 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 6518 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 7981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 6518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1444 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:49:39,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [910 Valid, 1027 Invalid, 7981 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [19 Valid, 6518 Invalid, 0 Unknown, 1444 Unchecked, 8.4s Time] [2022-11-20 11:49:39,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27973 states. [2022-11-20 11:49:39,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27973 to 21328. [2022-11-20 11:49:39,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21328 states, 21168 states have (on average 2.86890589569161) internal successors, (60729), 21327 states have internal predecessors, (60729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:39,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21328 states to 21328 states and 60729 transitions. [2022-11-20 11:49:39,885 INFO L78 Accepts]: Start accepts. Automaton has 21328 states and 60729 transitions. Word has length 19 [2022-11-20 11:49:39,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:49:39,886 INFO L495 AbstractCegarLoop]: Abstraction has 21328 states and 60729 transitions. [2022-11-20 11:49:39,886 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) [2022-11-20 11:49:39,886 INFO L276 IsEmpty]: Start isEmpty. Operand 21328 states and 60729 transitions. [2022-11-20 11:49:39,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 11:49:39,888 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:49:39,888 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:39,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:49:40,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-20 11:49:40,089 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)] === [2022-11-20 11:49:40,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:40,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1362952424, now seen corresponding path program 3 times [2022-11-20 11:49:40,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:49:40,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568710885] [2022-11-20 11:49:40,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:40,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:49:40,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:41,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:49:41,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:49:41,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568710885] [2022-11-20 11:49:41,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568710885] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:49:41,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:49:41,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-20 11:49:41,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032285407] [2022-11-20 11:49:41,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:49:41,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-20 11:49:41,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:49:41,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-20 11:49:41,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:49:41,378 INFO L87 Difference]: Start difference. First operand 21328 states and 60729 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) [2022-11-20 11:49:49,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:49:49,297 INFO L93 Difference]: Finished difference Result 22638 states and 63732 transitions. [2022-11-20 11:49:49,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 11:49:49,298 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 [2022-11-20 11:49:49,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:49:49,362 INFO L225 Difference]: With dead ends: 22638 [2022-11-20 11:49:49,363 INFO L226 Difference]: Without dead ends: 22638 [2022-11-20 11:49:49,363 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 [2022-11-20 11:49:49,363 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 767 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 5130 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 5139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 5130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-20 11:49:49,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [767 Valid, 547 Invalid, 5139 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [9 Valid, 5130 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-11-20 11:49:49,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22638 states. [2022-11-20 11:49:49,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22638 to 21356. [2022-11-20 11:49:49,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21356 states, 21196 states have (on average 2.8686544631062465) internal successors, (60804), 21355 states have internal predecessors, (60804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:49:49,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21356 states to 21356 states and 60804 transitions. [2022-11-20 11:49:49,827 INFO L78 Accepts]: Start accepts. Automaton has 21356 states and 60804 transitions. Word has length 19 [2022-11-20 11:49:49,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:49:49,827 INFO L495 AbstractCegarLoop]: Abstraction has 21356 states and 60804 transitions. [2022-11-20 11:49:49,827 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) [2022-11-20 11:49:49,827 INFO L276 IsEmpty]: Start isEmpty. Operand 21356 states and 60804 transitions. [2022-11-20 11:49:49,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 11:49:49,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:49:49,829 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:49:49,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-20 11:49:49,829 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reader_twoErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, reader_twoErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2022-11-20 11:49:49,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:49:49,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1359820784, now seen corresponding path program 2 times [2022-11-20 11:49:49,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:49:49,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031441604] [2022-11-20 11:49:49,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:49:49,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:49:49,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:49:51,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:49:51,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:49:51,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031441604] [2022-11-20 11:49:51,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031441604] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:49:51,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054271824] [2022-11-20 11:49:51,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:49:51,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:49:51,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:49:51,232 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:49:51,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_adc760de-ad53-4219-a7d9-4d4fea13897e/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:49:51,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:49:51,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:49:51,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-20 11:49:51,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:49:51,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:49:51,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 19 treesize of output 23 [2022-11-20 11:49:51,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:49:51,509 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 [2022-11-20 11:49:51,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-20 11:49:51,586 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 [2022-11-20 11:49:52,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:49:52,150 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-20 11:49:52,151 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 40 treesize of output 47 [2022-11-20 11:49:52,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:49:52,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:49:52,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:49:52,547 INFO L321 Elim1Store]: treesize reduction 56, result has 34.1 percent of original size [2022-11-20 11:49:52,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 71 treesize of output 80 [2022-11-20 11:49:53,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:49:53,342 INFO L321 Elim1Store]: treesize reduction 86, result has 51.7 percent of original size [2022-11-20 11:49:53,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 79 treesize of output 128 [2022-11-20 11:49:54,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:49:54,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:49:54,354 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 [2022-11-20 11:50:29,590 WARN L233 SmtUtils]: Spent 12.22s on a formula simplification that was a NOOP. DAG size: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:50:36,261 WARN L233 SmtUtils]: Spent 6.21s on a formula simplification that was a NOOP. DAG size: 86 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:50:48,713 WARN L233 SmtUtils]: Spent 7.24s on a formula simplification. DAG size of input: 68 DAG size of output: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:51:24,180 WARN L233 SmtUtils]: Spent 28.94s on a formula simplification. DAG size of input: 116 DAG size of output: 104 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:51:49,548 WARN L233 SmtUtils]: Spent 14.71s on a formula simplification that was a NOOP. DAG size: 107 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:51:50,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:51:50,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054271824] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:51:50,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:51:50,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2022-11-20 11:51:50,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626978017] [2022-11-20 11:51:50,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:51:50,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-20 11:51:50,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:51:50,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-20 11:51:50,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1433, Unknown=18, NotChecked=0, Total=1640 [2022-11-20 11:51:50,091 INFO L87 Difference]: Start difference. First operand 21356 states and 60804 transitions. Second operand has 41 states, 40 states have (on average 1.425) internal successors, (57), 40 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:52:59,969 WARN L233 SmtUtils]: Spent 34.39s on a formula simplification. DAG size of input: 117 DAG size of output: 85 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:54:02,205 WARN L233 SmtUtils]: Spent 16.21s on a formula simplification. DAG size of input: 91 DAG size of output: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:54:04,486 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse5 (select |c_#memory_int| |c_ULTIMATE.start_ring_enqueue_~r#1.base|)) (.cse2 (+ |c_ULTIMATE.start_ring_enqueue_~r#1.offset| 20))) (let ((.cse0 (select .cse5 .cse2))) (and (<= (+ |c_ULTIMATE.start_ring_enqueue_~r#1.offset| 12 (* .cse0 4)) (select |c_#length| |c_ULTIMATE.start_ring_enqueue_~r#1.base|)) (forall ((|v_ULTIMATE.start_ring_enqueue_#t~mem6#1_167| Int)) (or (forall ((v_ArrVal_978 Int)) (let ((.cse1 (store .cse5 (+ |c_ULTIMATE.start_ring_enqueue_~r#1.offset| 4 (* |v_ULTIMATE.start_ring_enqueue_#t~mem6#1_167| 4)) v_ArrVal_978))) (let ((.cse4 (+ (select .cse1 .cse2) 1))) (let ((.cse3 (mod .cse4 4))) (or (forall ((|v_ULTIMATE.start_ring_enqueue_~r#1.offset_319| Int)) (or (not (<= 0 |v_ULTIMATE.start_ring_enqueue_~r#1.offset_319|)) (<= 0 (+ (* (select (select (store |c_#memory_int| |c_ULTIMATE.start_ring_enqueue_~r#1.base| (store .cse1 .cse2 (+ .cse3 (- 4)))) |c_ULTIMATE.start_writer_fn_~r~1#1.base|) (+ |v_ULTIMATE.start_ring_enqueue_~r#1.offset_319| 20)) 4) |v_ULTIMATE.start_ring_enqueue_~r#1.offset_319| 4)) (< |c_ULTIMATE.start_writer_fn_~r~1#1.offset| |v_ULTIMATE.start_ring_enqueue_~r#1.offset_319|))) (= .cse3 0) (not (<= |c_ULTIMATE.start_ring_enqueue_~x#1| v_ArrVal_978)) (not (< .cse4 0))))))) (not (<= |v_ULTIMATE.start_ring_enqueue_#t~mem6#1_167| .cse0)))) (or (and (exists ((|ULTIMATE.start_writer_fn_~r~1#1.offset| Int) (|v_ULTIMATE.start_ring_enqueue_#t~mem6#1_164| Int)) (and (<= 1 (select .cse5 (+ |ULTIMATE.start_writer_fn_~r~1#1.offset| (* |v_ULTIMATE.start_ring_enqueue_#t~mem6#1_164| 4) 4))) (<= |c_ULTIMATE.start_ring_enqueue_~r#1.offset| |ULTIMATE.start_writer_fn_~r~1#1.offset|) (<= |ULTIMATE.start_writer_fn_~r~1#1.offset| 0) (= (select .cse5 (+ |ULTIMATE.start_writer_fn_~r~1#1.offset| 20)) 1) (<= |v_ULTIMATE.start_ring_enqueue_#t~mem6#1_164| 0))) (= (select .cse5 0) 0)) (exists ((|ULTIMATE.start_writer_fn_~r~1#1.offset| Int)) (and (<= |c_ULTIMATE.start_ring_enqueue_~r#1.offset| |ULTIMATE.start_writer_fn_~r~1#1.offset|) (<= |ULTIMATE.start_writer_fn_~r~1#1.offset| 0) (= (select .cse5 (+ |ULTIMATE.start_writer_fn_~r~1#1.offset| 20)) 1) (<= 1 (select .cse5 (+ |ULTIMATE.start_writer_fn_~r~1#1.offset| (* (div (- |ULTIMATE.start_writer_fn_~r~1#1.offset|) 4) 4))))))) (forall ((|v_ULTIMATE.start_ring_enqueue_#t~mem6#1_167| Int)) (or (forall ((v_ArrVal_978 Int)) (or (not (<= |c_ULTIMATE.start_ring_enqueue_~x#1| v_ArrVal_978)) (forall ((|v_ULTIMATE.start_ring_enqueue_~r#1.offset_319| Int)) (or (not (<= 0 |v_ULTIMATE.start_ring_enqueue_~r#1.offset_319|)) (< (* (select (select (store |c_#memory_int| |c_ULTIMATE.start_ring_enqueue_~r#1.base| (let ((.cse6 (store .cse5 (+ |c_ULTIMATE.start_ring_enqueue_~r#1.offset| 4 (* |v_ULTIMATE.start_ring_enqueue_#t~mem6#1_167| 4)) v_ArrVal_978))) (store .cse6 .cse2 (mod (+ (select .cse6 .cse2) 1) 4)))) |c_ULTIMATE.start_writer_fn_~r~1#1.base|) (+ |v_ULTIMATE.start_ring_enqueue_~r#1.offset_319| 20)) 4) 17) (< |c_ULTIMATE.start_writer_fn_~r~1#1.offset| |v_ULTIMATE.start_ring_enqueue_~r#1.offset_319|))))) (not (<= |v_ULTIMATE.start_ring_enqueue_#t~mem6#1_167| .cse0)))) (<= 0 |c_ULTIMATE.start_ring_enqueue_~r#1.offset|) (<= 0 .cse0) (= |c_ULTIMATE.start_ring_enqueue_~r#1.offset| 0) (forall ((|v_ULTIMATE.start_ring_enqueue_#t~mem6#1_167| Int)) (or (forall ((v_ArrVal_978 Int)) (or (not (<= |c_ULTIMATE.start_ring_enqueue_~x#1| v_ArrVal_978)) (forall ((|v_ULTIMATE.start_ring_enqueue_~r#1.offset_319| Int)) (or (<= 0 (+ (* (select (select (store |c_#memory_int| |c_ULTIMATE.start_ring_enqueue_~r#1.base| (let ((.cse7 (store .cse5 (+ |c_ULTIMATE.start_ring_enqueue_~r#1.offset| 4 (* |v_ULTIMATE.start_ring_enqueue_#t~mem6#1_167| 4)) v_ArrVal_978))) (store .cse7 .cse2 (mod (+ (select .cse7 .cse2) 1) 4)))) |c_ULTIMATE.start_writer_fn_~r~1#1.base|) (+ |v_ULTIMATE.start_ring_enqueue_~r#1.offset_319| 20)) 4) |v_ULTIMATE.start_ring_enqueue_~r#1.offset_319| 4)) (not (<= 0 |v_ULTIMATE.start_ring_enqueue_~r#1.offset_319|)) (< |c_ULTIMATE.start_writer_fn_~r~1#1.offset| |v_ULTIMATE.start_ring_enqueue_~r#1.offset_319|))))) (not (<= |v_ULTIMATE.start_ring_enqueue_#t~mem6#1_167| .cse0))))))) is different from false [2022-11-20 11:54:06,501 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse13 (select |c_#memory_int| |c_ULTIMATE.start_ring_enqueue_~r#1.base|)) (.cse16 (+ |c_ULTIMATE.start_ring_enqueue_~r#1.offset| 20))) (let ((.cse0 (select .cse13 .cse16)) (.cse14 (<= 0 |c_ULTIMATE.start_ring_enqueue_~r#1.offset|)) (.cse6 (select .cse13 |c_ULTIMATE.start_ring_enqueue_~r#1.offset|))) (let ((.cse3 (+ .cse6 4)) (.cse5 (not .cse14)) (.cse7 (and (forall ((|v_ULTIMATE.start_ring_enqueue_#t~mem6#1_167| Int)) (or (forall ((v_ArrVal_978 Int)) (let ((.cse15 (store .cse13 (+ |c_ULTIMATE.start_ring_enqueue_~r#1.offset| 4 (* |v_ULTIMATE.start_ring_enqueue_#t~mem6#1_167| 4)) v_ArrVal_978))) (let ((.cse18 (+ (select .cse15 .cse16) 1))) (let ((.cse17 (mod .cse18 4))) (or (forall ((|v_ULTIMATE.start_ring_enqueue_~r#1.offset_319| Int)) (or (not (<= 0 |v_ULTIMATE.start_ring_enqueue_~r#1.offset_319|)) (<= 0 (+ (* (select (select (store |c_#memory_int| |c_ULTIMATE.start_ring_enqueue_~r#1.base| (store .cse15 .cse16 (+ .cse17 (- 4)))) |c_ULTIMATE.start_writer_fn_~r~1#1.base|) (+ |v_ULTIMATE.start_ring_enqueue_~r#1.offset_319| 20)) 4) |v_ULTIMATE.start_ring_enqueue_~r#1.offset_319| 4)) (< |c_ULTIMATE.start_writer_fn_~r~1#1.offset| |v_ULTIMATE.start_ring_enqueue_~r#1.offset_319|))) (= .cse17 0) (not (<= |c_ULTIMATE.start_ring_enqueue_~x#1| v_ArrVal_978)) (not (< .cse18 0))))))) (not (<= |v_ULTIMATE.start_ring_enqueue_#t~mem6#1_167| .cse0)))) (forall ((|v_ULTIMATE.start_ring_enqueue_#t~mem6#1_167| Int)) (or (forall ((v_ArrVal_978 Int)) (or (not (<= |c_ULTIMATE.start_ring_enqueue_~x#1| v_ArrVal_978)) (forall ((|v_ULTIMATE.start_ring_enqueue_~r#1.offset_319| Int)) (or (not (<= 0 |v_ULTIMATE.start_ring_enqueue_~r#1.offset_319|)) (< (* (select (select (store |c_#memory_int| |c_ULTIMATE.start_ring_enqueue_~r#1.base| (let ((.cse19 (store .cse13 (+ |c_ULTIMATE.start_ring_enqueue_~r#1.offset| 4 (* |v_ULTIMATE.start_ring_enqueue_#t~mem6#1_167| 4)) v_ArrVal_978))) (store .cse19 .cse16 (mod (+ (select .cse19 .cse16) 1) 4)))) |c_ULTIMATE.start_writer_fn_~r~1#1.base|) (+ |v_ULTIMATE.start_ring_enqueue_~r#1.offset_319| 20)) 4) 17) (< |c_ULTIMATE.start_writer_fn_~r~1#1.offset| |v_ULTIMATE.start_ring_enqueue_~r#1.offset_319|))))) (not (<= |v_ULTIMATE.start_ring_enqueue_#t~mem6#1_167| .cse0)))) (forall ((|v_ULTIMATE.start_ring_enqueue_#t~mem6#1_167| Int)) (or (forall ((v_ArrVal_978 Int)) (or (not (<= |c_ULTIMATE.start_ring_enqueue_~x#1| v_ArrVal_978)) (forall ((|v_ULTIMATE.start_ring_enqueue_~r#1.offset_319| Int)) (or (<= 0 (+ (* (select (select (store |c_#memory_int| |c_ULTIMATE.start_ring_enqueue_~r#1.base| (let ((.cse20 (store .cse13 (+ |c_ULTIMATE.start_ring_enqueue_~r#1.offset| 4 (* |v_ULTIMATE.start_ring_enqueue_#t~mem6#1_167| 4)) v_ArrVal_978))) (store .cse20 .cse16 (mod (+ (select .cse20 .cse16) 1) 4)))) |c_ULTIMATE.start_writer_fn_~r~1#1.base|) (+ |v_ULTIMATE.start_ring_enqueue_~r#1.offset_319| 20)) 4) |v_ULTIMATE.start_ring_enqueue_~r#1.offset_319| 4)) (not (<= 0 |v_ULTIMATE.start_ring_enqueue_~r#1.offset_319|)) (< |c_ULTIMATE.start_writer_fn_~r~1#1.offset| |v_ULTIMATE.start_ring_enqueue_~r#1.offset_319|))))) (not (<= |v_ULTIMATE.start_ring_enqueue_#t~mem6#1_167| .cse0))))))) (and (= .cse0 |c_ULTIMATE.start_ring_enqueue_#t~mem4#1|) (let ((.cse8 (+ 1 |c_ULTIMATE.start_ring_enqueue_#t~mem4#1|))) (let ((.cse2 (mod .cse8 4))) (let ((.cse4 (< .cse8 0)) (.cse1 (= .cse2 0))) (or (and (not .cse1) (= .cse2 .cse3) .cse4) .cse5 (and (or (not .cse4) .cse1) (= .cse2 .cse6)) .cse7)))) (let ((.cse12 (+ .cse0 1))) (let ((.cse9 (mod .cse12 4))) (let ((.cse11 (= .cse9 0)) (.cse10 (< .cse12 0))) (or (and (= .cse9 .cse6) (or (not .cse10) .cse11)) (and (not .cse11) .cse10 (= .cse9 .cse3)) .cse5 .cse7)))) (or (and (exists ((|ULTIMATE.start_writer_fn_~r~1#1.offset| Int) (|v_ULTIMATE.start_ring_enqueue_#t~mem6#1_164| Int)) (and (<= 1 (select .cse13 (+ |ULTIMATE.start_writer_fn_~r~1#1.offset| (* |v_ULTIMATE.start_ring_enqueue_#t~mem6#1_164| 4) 4))) (<= |c_ULTIMATE.start_ring_enqueue_~r#1.offset| |ULTIMATE.start_writer_fn_~r~1#1.offset|) (<= |ULTIMATE.start_writer_fn_~r~1#1.offset| 0) (= (select .cse13 (+ |ULTIMATE.start_writer_fn_~r~1#1.offset| 20)) 1) (<= |v_ULTIMATE.start_ring_enqueue_#t~mem6#1_164| 0))) (= (select .cse13 0) 0)) (exists ((|ULTIMATE.start_writer_fn_~r~1#1.offset| Int)) (and (<= |c_ULTIMATE.start_ring_enqueue_~r#1.offset| |ULTIMATE.start_writer_fn_~r~1#1.offset|) (<= |ULTIMATE.start_writer_fn_~r~1#1.offset| 0) (= (select .cse13 (+ |ULTIMATE.start_writer_fn_~r~1#1.offset| 20)) 1) (<= 1 (select .cse13 (+ |ULTIMATE.start_writer_fn_~r~1#1.offset| (* (div (- |ULTIMATE.start_writer_fn_~r~1#1.offset|) 4) 4))))))) .cse14 (<= 0 |c_ULTIMATE.start_ring_enqueue_#t~mem4#1|) (<= (+ |c_ULTIMATE.start_ring_enqueue_~r#1.offset| 12 (* 4 |c_ULTIMATE.start_ring_enqueue_#t~mem4#1|)) (select |c_#length| |c_ULTIMATE.start_ring_enqueue_~r#1.base|)) (= |c_ULTIMATE.start_ring_enqueue_~r#1.offset| 0))))) is different from false [2022-11-20 11:55:35,132 WARN L233 SmtUtils]: Spent 40.74s on a formula simplification. DAG size of input: 125 DAG size of output: 110 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:56:55,391 WARN L233 SmtUtils]: Spent 27.85s on a formula simplification. DAG size of input: 96 DAG size of output: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:57:50,960 WARN L233 SmtUtils]: Spent 11.01s on a formula simplification. DAG size of input: 81 DAG size of output: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:58:29,218 WARN L233 SmtUtils]: Spent 20.77s on a formula simplification. DAG size of input: 98 DAG size of output: 85 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:58:46,170 WARN L233 SmtUtils]: Spent 16.31s on a formula simplification. DAG size of input: 104 DAG size of output: 103 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)