./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0218.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0218.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8 --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 d0144744ce48339ff9171f70682ff014d707c8affcdd45929fe7382e980b7693 --- 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-2329fc7 [2022-12-13 14:41:07,241 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 14:41:07,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 14:41:07,255 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 14:41:07,255 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 14:41:07,256 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 14:41:07,257 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 14:41:07,258 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 14:41:07,259 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 14:41:07,259 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 14:41:07,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 14:41:07,261 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 14:41:07,261 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 14:41:07,262 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 14:41:07,262 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 14:41:07,263 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 14:41:07,264 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 14:41:07,264 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 14:41:07,265 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 14:41:07,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 14:41:07,268 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 14:41:07,269 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 14:41:07,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 14:41:07,272 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 14:41:07,278 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 14:41:07,278 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 14:41:07,279 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 14:41:07,279 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 14:41:07,279 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 14:41:07,280 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 14:41:07,280 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 14:41:07,281 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 14:41:07,281 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 14:41:07,282 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 14:41:07,282 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 14:41:07,282 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 14:41:07,283 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 14:41:07,283 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 14:41:07,283 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 14:41:07,284 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 14:41:07,284 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 14:41:07,285 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 14:41:07,299 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 14:41:07,300 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 14:41:07,300 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 14:41:07,300 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 14:41:07,300 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 14:41:07,301 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 14:41:07,301 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 14:41:07,301 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 14:41:07,301 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 14:41:07,302 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 14:41:07,302 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 14:41:07,302 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 14:41:07,302 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 14:41:07,302 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 14:41:07,302 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 14:41:07,302 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 14:41:07,302 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 14:41:07,302 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 14:41:07,303 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 14:41:07,303 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 14:41:07,303 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 14:41:07,303 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 14:41:07,303 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 14:41:07,303 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 14:41:07,303 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 14:41:07,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:41:07,303 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 14:41:07,303 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 14:41:07,304 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 14:41:07,304 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 14:41:07,304 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 14:41:07,304 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 14:41:07,304 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 14:41:07,304 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 14:41:07,304 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d0144744ce48339ff9171f70682ff014d707c8affcdd45929fe7382e980b7693 [2022-12-13 14:41:07,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 14:41:07,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 14:41:07,498 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 14:41:07,499 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 14:41:07,499 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 14:41:07,500 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/memsafety/test-0218.i [2022-12-13 14:41:10,063 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 14:41:10,246 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 14:41:10,247 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/sv-benchmarks/c/memsafety/test-0218.i [2022-12-13 14:41:10,255 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/data/c43ba3337/5af8dc0f3d364e5da08ec8baa11b8f34/FLAG22bae26f7 [2022-12-13 14:41:10,661 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/data/c43ba3337/5af8dc0f3d364e5da08ec8baa11b8f34 [2022-12-13 14:41:10,665 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 14:41:10,667 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 14:41:10,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 14:41:10,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 14:41:10,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 14:41:10,675 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:41:10" (1/1) ... [2022-12-13 14:41:10,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@449f7195 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:41:10, skipping insertion in model container [2022-12-13 14:41:10,677 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:41:10" (1/1) ... [2022-12-13 14:41:10,685 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 14:41:10,713 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 14:41:10,980 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:41:10,989 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 14:41:11,019 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:41:11,040 INFO L208 MainTranslator]: Completed translation [2022-12-13 14:41:11,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:41:11 WrapperNode [2022-12-13 14:41:11,041 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 14:41:11,041 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 14:41:11,041 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 14:41:11,042 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 14:41:11,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:41:11" (1/1) ... [2022-12-13 14:41:11,058 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:41:11" (1/1) ... [2022-12-13 14:41:11,076 INFO L138 Inliner]: procedures = 181, calls = 46, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 208 [2022-12-13 14:41:11,076 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 14:41:11,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 14:41:11,077 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 14:41:11,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 14:41:11,083 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:41:11" (1/1) ... [2022-12-13 14:41:11,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:41:11" (1/1) ... [2022-12-13 14:41:11,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:41:11" (1/1) ... [2022-12-13 14:41:11,087 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:41:11" (1/1) ... [2022-12-13 14:41:11,093 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:41:11" (1/1) ... [2022-12-13 14:41:11,096 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:41:11" (1/1) ... [2022-12-13 14:41:11,097 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:41:11" (1/1) ... [2022-12-13 14:41:11,098 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:41:11" (1/1) ... [2022-12-13 14:41:11,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 14:41:11,101 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 14:41:11,101 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 14:41:11,101 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 14:41:11,102 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:41:11" (1/1) ... [2022-12-13 14:41:11,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 14:41:11,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:41:11,126 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 14:41:11,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 14:41:11,159 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2022-12-13 14:41:11,160 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2022-12-13 14:41:11,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 14:41:11,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 14:41:11,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-13 14:41:11,160 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-13 14:41:11,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 14:41:11,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-13 14:41:11,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 14:41:11,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 14:41:11,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 14:41:11,264 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 14:41:11,266 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 14:41:11,652 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 14:41:11,658 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 14:41:11,658 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-12-13 14:41:11,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:41:11 BoogieIcfgContainer [2022-12-13 14:41:11,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 14:41:11,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 14:41:11,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 14:41:11,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 14:41:11,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 02:41:10" (1/3) ... [2022-12-13 14:41:11,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69e7df55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:41:11, skipping insertion in model container [2022-12-13 14:41:11,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:41:11" (2/3) ... [2022-12-13 14:41:11,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69e7df55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 02:41:11, skipping insertion in model container [2022-12-13 14:41:11,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:41:11" (3/3) ... [2022-12-13 14:41:11,667 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0218.i [2022-12-13 14:41:11,682 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 14:41:11,682 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 65 error locations. [2022-12-13 14:41:11,718 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 14:41:11,723 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=PETRI_NET, 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;@1ac12445, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 14:41:11,724 INFO L358 AbstractCegarLoop]: Starting to check reachability of 65 error locations. [2022-12-13 14:41:11,727 INFO L276 IsEmpty]: Start isEmpty. Operand has 163 states, 94 states have (on average 1.9574468085106382) internal successors, (184), 159 states have internal predecessors, (184), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 14:41:11,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 14:41:11,732 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:11,732 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 14:41:11,733 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr57REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:11,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:11,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1074395626, now seen corresponding path program 1 times [2022-12-13 14:41:11,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:11,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684232440] [2022-12-13 14:41:11,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:11,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:11,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:11,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:11,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684232440] [2022-12-13 14:41:11,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684232440] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:11,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:11,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:41:11,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086835890] [2022-12-13 14:41:11,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:11,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 14:41:11,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:11,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 14:41:11,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 14:41:11,909 INFO L87 Difference]: Start difference. First operand has 163 states, 94 states have (on average 1.9574468085106382) internal successors, (184), 159 states have internal predecessors, (184), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:41:11,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:11,932 INFO L93 Difference]: Finished difference Result 163 states and 182 transitions. [2022-12-13 14:41:11,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 14:41:11,934 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-13 14:41:11,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:11,941 INFO L225 Difference]: With dead ends: 163 [2022-12-13 14:41:11,941 INFO L226 Difference]: Without dead ends: 161 [2022-12-13 14:41:11,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 14:41:11,945 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:11,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:41:11,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-12-13 14:41:11,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-12-13 14:41:11,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 93 states have (on average 1.89247311827957) internal successors, (176), 157 states have internal predecessors, (176), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 14:41:11,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 180 transitions. [2022-12-13 14:41:11,976 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 180 transitions. Word has length 6 [2022-12-13 14:41:11,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:11,976 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 180 transitions. [2022-12-13 14:41:11,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:41:11,976 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 180 transitions. [2022-12-13 14:41:11,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 14:41:11,977 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:11,977 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:11,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 14:41:11,977 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr57REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:11,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:11,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1280335204, now seen corresponding path program 1 times [2022-12-13 14:41:11,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:11,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015717894] [2022-12-13 14:41:11,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:11,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:11,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:12,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:12,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:12,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015717894] [2022-12-13 14:41:12,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015717894] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:12,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:12,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 14:41:12,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887492646] [2022-12-13 14:41:12,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:12,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:41:12,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:12,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:41:12,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:41:12,066 INFO L87 Difference]: Start difference. First operand 161 states and 180 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:41:12,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:12,243 INFO L93 Difference]: Finished difference Result 313 states and 350 transitions. [2022-12-13 14:41:12,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:41:12,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-13 14:41:12,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:12,246 INFO L225 Difference]: With dead ends: 313 [2022-12-13 14:41:12,246 INFO L226 Difference]: Without dead ends: 313 [2022-12-13 14:41:12,246 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 [2022-12-13 14:41:12,248 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 161 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:12,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 233 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:41:12,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-12-13 14:41:12,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 223. [2022-12-13 14:41:12,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 152 states have (on average 1.868421052631579) internal successors, (284), 216 states have internal predecessors, (284), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 14:41:12,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 292 transitions. [2022-12-13 14:41:12,265 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 292 transitions. Word has length 7 [2022-12-13 14:41:12,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:12,266 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 292 transitions. [2022-12-13 14:41:12,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:41:12,266 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 292 transitions. [2022-12-13 14:41:12,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 14:41:12,266 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:12,267 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:12,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 14:41:12,267 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr58REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:12,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:12,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1280335203, now seen corresponding path program 1 times [2022-12-13 14:41:12,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:12,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481292646] [2022-12-13 14:41:12,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:12,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:12,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:12,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:12,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:12,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481292646] [2022-12-13 14:41:12,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481292646] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:12,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:12,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:41:12,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112476561] [2022-12-13 14:41:12,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:12,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:41:12,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:12,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:41:12,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:41:12,416 INFO L87 Difference]: Start difference. First operand 223 states and 292 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:41:12,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:12,546 INFO L93 Difference]: Finished difference Result 241 states and 310 transitions. [2022-12-13 14:41:12,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:41:12,547 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-13 14:41:12,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:12,548 INFO L225 Difference]: With dead ends: 241 [2022-12-13 14:41:12,548 INFO L226 Difference]: Without dead ends: 241 [2022-12-13 14:41:12,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:41:12,549 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 208 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:12,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 238 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:41:12,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-12-13 14:41:12,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 225. [2022-12-13 14:41:12,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 154 states have (on average 1.8636363636363635) internal successors, (287), 218 states have internal predecessors, (287), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 14:41:12,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 295 transitions. [2022-12-13 14:41:12,557 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 295 transitions. Word has length 7 [2022-12-13 14:41:12,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:12,558 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 295 transitions. [2022-12-13 14:41:12,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:41:12,558 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 295 transitions. [2022-12-13 14:41:12,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 14:41:12,558 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:12,558 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:12,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 14:41:12,559 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr58REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:12,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:12,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1280335141, now seen corresponding path program 1 times [2022-12-13 14:41:12,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:12,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052623685] [2022-12-13 14:41:12,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:12,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:12,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:12,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:12,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:12,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052623685] [2022-12-13 14:41:12,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052623685] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:12,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:12,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:41:12,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050387975] [2022-12-13 14:41:12,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:12,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:41:12,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:12,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:41:12,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:41:12,646 INFO L87 Difference]: Start difference. First operand 225 states and 295 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:41:12,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:12,759 INFO L93 Difference]: Finished difference Result 240 states and 308 transitions. [2022-12-13 14:41:12,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:41:12,759 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-13 14:41:12,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:12,760 INFO L225 Difference]: With dead ends: 240 [2022-12-13 14:41:12,760 INFO L226 Difference]: Without dead ends: 240 [2022-12-13 14:41:12,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:41:12,761 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 190 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:12,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 251 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:41:12,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-12-13 14:41:12,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 222. [2022-12-13 14:41:12,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 152 states have (on average 1.855263157894737) internal successors, (282), 215 states have internal predecessors, (282), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 14:41:12,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 290 transitions. [2022-12-13 14:41:12,768 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 290 transitions. Word has length 7 [2022-12-13 14:41:12,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:12,768 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 290 transitions. [2022-12-13 14:41:12,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:41:12,768 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 290 transitions. [2022-12-13 14:41:12,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 14:41:12,769 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:12,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:12,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 14:41:12,769 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:12,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:12,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1138725070, now seen corresponding path program 1 times [2022-12-13 14:41:12,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:12,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747725888] [2022-12-13 14:41:12,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:12,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:12,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:12,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:12,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747725888] [2022-12-13 14:41:12,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747725888] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:12,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:12,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 14:41:12,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072901182] [2022-12-13 14:41:12,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:12,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 14:41:12,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:12,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 14:41:12,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 14:41:12,900 INFO L87 Difference]: Start difference. First operand 222 states and 290 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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) [2022-12-13 14:41:13,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:13,111 INFO L93 Difference]: Finished difference Result 394 states and 505 transitions. [2022-12-13 14:41:13,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 14:41:13,111 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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 [2022-12-13 14:41:13,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:13,113 INFO L225 Difference]: With dead ends: 394 [2022-12-13 14:41:13,113 INFO L226 Difference]: Without dead ends: 394 [2022-12-13 14:41:13,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-13 14:41:13,114 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 146 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:13,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 745 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:41:13,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-12-13 14:41:13,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 288. [2022-12-13 14:41:13,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 212 states have (on average 1.7971698113207548) internal successors, (381), 277 states have internal predecessors, (381), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 14:41:13,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 397 transitions. [2022-12-13 14:41:13,127 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 397 transitions. Word has length 10 [2022-12-13 14:41:13,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:13,127 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 397 transitions. [2022-12-13 14:41:13,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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) [2022-12-13 14:41:13,128 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 397 transitions. [2022-12-13 14:41:13,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 14:41:13,128 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:13,128 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:13,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 14:41:13,129 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:13,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:13,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1140572112, now seen corresponding path program 1 times [2022-12-13 14:41:13,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:13,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673784280] [2022-12-13 14:41:13,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:13,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:13,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:13,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:13,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673784280] [2022-12-13 14:41:13,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673784280] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:13,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:13,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 14:41:13,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564663451] [2022-12-13 14:41:13,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:13,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 14:41:13,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:13,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 14:41:13,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 14:41:13,245 INFO L87 Difference]: Start difference. First operand 288 states and 397 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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) [2022-12-13 14:41:13,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:13,383 INFO L93 Difference]: Finished difference Result 384 states and 494 transitions. [2022-12-13 14:41:13,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 14:41:13,384 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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 [2022-12-13 14:41:13,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:13,386 INFO L225 Difference]: With dead ends: 384 [2022-12-13 14:41:13,386 INFO L226 Difference]: Without dead ends: 384 [2022-12-13 14:41:13,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-12-13 14:41:13,387 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 125 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:13,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 714 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:41:13,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-12-13 14:41:13,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 288. [2022-12-13 14:41:13,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 212 states have (on average 1.7971698113207548) internal successors, (381), 277 states have internal predecessors, (381), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 14:41:13,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 397 transitions. [2022-12-13 14:41:13,397 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 397 transitions. Word has length 10 [2022-12-13 14:41:13,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:13,397 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 397 transitions. [2022-12-13 14:41:13,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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) [2022-12-13 14:41:13,397 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 397 transitions. [2022-12-13 14:41:13,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 14:41:13,398 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:13,398 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:13,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 14:41:13,398 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:13,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:13,398 INFO L85 PathProgramCache]: Analyzing trace with hash 940737540, now seen corresponding path program 1 times [2022-12-13 14:41:13,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:13,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510543331] [2022-12-13 14:41:13,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:13,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:13,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:13,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:13,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510543331] [2022-12-13 14:41:13,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510543331] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:13,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:13,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:41:13,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978270167] [2022-12-13 14:41:13,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:13,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:41:13,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:13,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:41:13,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:41:13,418 INFO L87 Difference]: Start difference. First operand 288 states and 397 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:41:13,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:13,499 INFO L93 Difference]: Finished difference Result 339 states and 444 transitions. [2022-12-13 14:41:13,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:41:13,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-13 14:41:13,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:13,502 INFO L225 Difference]: With dead ends: 339 [2022-12-13 14:41:13,502 INFO L226 Difference]: Without dead ends: 332 [2022-12-13 14:41:13,503 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 [2022-12-13 14:41:13,503 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 64 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:13,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 267 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:41:13,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-12-13 14:41:13,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 285. [2022-12-13 14:41:13,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 209 states have (on average 1.799043062200957) internal successors, (376), 274 states have internal predecessors, (376), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 14:41:13,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 392 transitions. [2022-12-13 14:41:13,512 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 392 transitions. Word has length 11 [2022-12-13 14:41:13,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:13,513 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 392 transitions. [2022-12-13 14:41:13,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 14:41:13,513 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 392 transitions. [2022-12-13 14:41:13,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-13 14:41:13,513 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:13,514 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:13,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 14:41:13,514 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:13,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:13,514 INFO L85 PathProgramCache]: Analyzing trace with hash 418669755, now seen corresponding path program 1 times [2022-12-13 14:41:13,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:13,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381810298] [2022-12-13 14:41:13,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:13,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:13,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:13,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 14:41:13,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:13,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:13,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:13,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381810298] [2022-12-13 14:41:13,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381810298] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:13,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:13,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:41:13,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577899368] [2022-12-13 14:41:13,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:13,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:41:13,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:13,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:41:13,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:41:13,576 INFO L87 Difference]: Start difference. First operand 285 states and 392 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:13,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:13,771 INFO L93 Difference]: Finished difference Result 482 states and 587 transitions. [2022-12-13 14:41:13,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:41:13,772 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-12-13 14:41:13,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:13,773 INFO L225 Difference]: With dead ends: 482 [2022-12-13 14:41:13,773 INFO L226 Difference]: Without dead ends: 482 [2022-12-13 14:41:13,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:41:13,774 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 307 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:13,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 408 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 14:41:13,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-12-13 14:41:13,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 291. [2022-12-13 14:41:13,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 215 states have (on average 1.7767441860465116) internal successors, (382), 280 states have internal predecessors, (382), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 14:41:13,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 398 transitions. [2022-12-13 14:41:13,782 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 398 transitions. Word has length 15 [2022-12-13 14:41:13,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:13,782 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 398 transitions. [2022-12-13 14:41:13,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:13,783 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 398 transitions. [2022-12-13 14:41:13,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-13 14:41:13,783 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:13,783 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:13,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 14:41:13,784 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:13,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:13,784 INFO L85 PathProgramCache]: Analyzing trace with hash 418669756, now seen corresponding path program 1 times [2022-12-13 14:41:13,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:13,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241308281] [2022-12-13 14:41:13,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:13,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:13,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:13,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 14:41:13,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:13,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:13,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:13,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241308281] [2022-12-13 14:41:13,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241308281] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:13,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:13,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:41:13,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9468084] [2022-12-13 14:41:13,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:13,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:41:13,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:13,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:41:13,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:41:13,875 INFO L87 Difference]: Start difference. First operand 291 states and 398 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:14,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:14,019 INFO L93 Difference]: Finished difference Result 389 states and 506 transitions. [2022-12-13 14:41:14,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:41:14,020 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-12-13 14:41:14,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:14,022 INFO L225 Difference]: With dead ends: 389 [2022-12-13 14:41:14,022 INFO L226 Difference]: Without dead ends: 389 [2022-12-13 14:41:14,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:41:14,023 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 331 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:14,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 264 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:41:14,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-12-13 14:41:14,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 288. [2022-12-13 14:41:14,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 215 states have (on average 1.7209302325581395) internal successors, (370), 277 states have internal predecessors, (370), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 14:41:14,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 386 transitions. [2022-12-13 14:41:14,031 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 386 transitions. Word has length 15 [2022-12-13 14:41:14,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:14,032 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 386 transitions. [2022-12-13 14:41:14,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:14,032 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 386 transitions. [2022-12-13 14:41:14,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 14:41:14,032 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:14,032 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:14,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 14:41:14,033 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:14,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:14,033 INFO L85 PathProgramCache]: Analyzing trace with hash -66961466, now seen corresponding path program 1 times [2022-12-13 14:41:14,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:14,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526725631] [2022-12-13 14:41:14,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:14,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:14,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:14,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:14,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:14,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:14,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526725631] [2022-12-13 14:41:14,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526725631] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:14,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:14,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 14:41:14,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056005938] [2022-12-13 14:41:14,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:14,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:41:14,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:14,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:41:14,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:41:14,140 INFO L87 Difference]: Start difference. First operand 288 states and 386 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:14,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:14,451 INFO L93 Difference]: Finished difference Result 608 states and 705 transitions. [2022-12-13 14:41:14,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:41:14,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-12-13 14:41:14,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:14,454 INFO L225 Difference]: With dead ends: 608 [2022-12-13 14:41:14,454 INFO L226 Difference]: Without dead ends: 608 [2022-12-13 14:41:14,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:41:14,455 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 647 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:14,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [649 Valid, 560 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 14:41:14,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-12-13 14:41:14,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 285. [2022-12-13 14:41:14,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 216 states have (on average 1.6851851851851851) internal successors, (364), 274 states have internal predecessors, (364), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 14:41:14,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 380 transitions. [2022-12-13 14:41:14,462 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 380 transitions. Word has length 17 [2022-12-13 14:41:14,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:14,462 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 380 transitions. [2022-12-13 14:41:14,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:14,462 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 380 transitions. [2022-12-13 14:41:14,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 14:41:14,462 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:14,462 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:14,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 14:41:14,463 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:14,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:14,463 INFO L85 PathProgramCache]: Analyzing trace with hash -66961465, now seen corresponding path program 1 times [2022-12-13 14:41:14,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:14,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219087906] [2022-12-13 14:41:14,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:14,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:14,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:14,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:14,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:14,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:14,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:14,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219087906] [2022-12-13 14:41:14,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219087906] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:14,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:14,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 14:41:14,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764927506] [2022-12-13 14:41:14,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:14,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 14:41:14,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:14,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 14:41:14,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 14:41:14,604 INFO L87 Difference]: Start difference. First operand 285 states and 380 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:14,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:14,930 INFO L93 Difference]: Finished difference Result 586 states and 782 transitions. [2022-12-13 14:41:14,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 14:41:14,931 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-12-13 14:41:14,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:14,933 INFO L225 Difference]: With dead ends: 586 [2022-12-13 14:41:14,933 INFO L226 Difference]: Without dead ends: 586 [2022-12-13 14:41:14,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-12-13 14:41:14,934 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 526 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:14,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [528 Valid, 636 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 14:41:14,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-12-13 14:41:14,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 347. [2022-12-13 14:41:14,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 274 states have (on average 1.667883211678832) internal successors, (457), 334 states have internal predecessors, (457), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-12-13 14:41:14,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 481 transitions. [2022-12-13 14:41:14,946 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 481 transitions. Word has length 17 [2022-12-13 14:41:14,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:14,946 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 481 transitions. [2022-12-13 14:41:14,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:14,947 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 481 transitions. [2022-12-13 14:41:14,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 14:41:14,947 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:14,947 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:14,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 14:41:14,947 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:14,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:14,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1874415928, now seen corresponding path program 1 times [2022-12-13 14:41:14,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:14,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070514442] [2022-12-13 14:41:14,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:14,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:15,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:15,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:15,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:15,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:15,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070514442] [2022-12-13 14:41:15,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070514442] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:15,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:15,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 14:41:15,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444758228] [2022-12-13 14:41:15,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:15,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 14:41:15,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:15,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 14:41:15,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 14:41:15,023 INFO L87 Difference]: Start difference. First operand 347 states and 481 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:15,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:15,110 INFO L93 Difference]: Finished difference Result 551 states and 744 transitions. [2022-12-13 14:41:15,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 14:41:15,110 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-12-13 14:41:15,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:15,111 INFO L225 Difference]: With dead ends: 551 [2022-12-13 14:41:15,112 INFO L226 Difference]: Without dead ends: 551 [2022-12-13 14:41:15,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-13 14:41:15,112 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 227 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:15,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 1358 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:41:15,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-12-13 14:41:15,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 347. [2022-12-13 14:41:15,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 274 states have (on average 1.6605839416058394) internal successors, (455), 334 states have internal predecessors, (455), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-12-13 14:41:15,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 479 transitions. [2022-12-13 14:41:15,120 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 479 transitions. Word has length 17 [2022-12-13 14:41:15,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:15,120 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 479 transitions. [2022-12-13 14:41:15,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:15,120 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 479 transitions. [2022-12-13 14:41:15,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-13 14:41:15,120 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:15,120 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:15,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 14:41:15,120 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:15,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:15,121 INFO L85 PathProgramCache]: Analyzing trace with hash 2022703953, now seen corresponding path program 1 times [2022-12-13 14:41:15,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:15,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726598323] [2022-12-13 14:41:15,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:15,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:15,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:15,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:15,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:15,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:15,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:15,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726598323] [2022-12-13 14:41:15,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726598323] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:15,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:15,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 14:41:15,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003525791] [2022-12-13 14:41:15,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:15,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 14:41:15,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:15,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 14:41:15,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 14:41:15,251 INFO L87 Difference]: Start difference. First operand 347 states and 479 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:15,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:15,614 INFO L93 Difference]: Finished difference Result 627 states and 851 transitions. [2022-12-13 14:41:15,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 14:41:15,614 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-12-13 14:41:15,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:15,618 INFO L225 Difference]: With dead ends: 627 [2022-12-13 14:41:15,618 INFO L226 Difference]: Without dead ends: 627 [2022-12-13 14:41:15,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-12-13 14:41:15,618 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 438 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:15,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 771 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 14:41:15,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-12-13 14:41:15,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 342. [2022-12-13 14:41:15,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 269 states have (on average 1.661710037174721) internal successors, (447), 329 states have internal predecessors, (447), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-12-13 14:41:15,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 471 transitions. [2022-12-13 14:41:15,626 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 471 transitions. Word has length 18 [2022-12-13 14:41:15,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:15,626 INFO L495 AbstractCegarLoop]: Abstraction has 342 states and 471 transitions. [2022-12-13 14:41:15,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:15,626 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 471 transitions. [2022-12-13 14:41:15,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 14:41:15,626 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:15,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:15,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 14:41:15,627 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:15,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:15,627 INFO L85 PathProgramCache]: Analyzing trace with hash 413987999, now seen corresponding path program 1 times [2022-12-13 14:41:15,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:15,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028390866] [2022-12-13 14:41:15,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:15,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:15,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 14:41:15,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:15,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:15,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:15,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028390866] [2022-12-13 14:41:15,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028390866] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:15,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:15,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 14:41:15,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986954212] [2022-12-13 14:41:15,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:15,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 14:41:15,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:15,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 14:41:15,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-12-13 14:41:15,927 INFO L87 Difference]: Start difference. First operand 342 states and 471 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:16,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:16,578 INFO L93 Difference]: Finished difference Result 704 states and 955 transitions. [2022-12-13 14:41:16,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 14:41:16,579 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-12-13 14:41:16,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:16,583 INFO L225 Difference]: With dead ends: 704 [2022-12-13 14:41:16,583 INFO L226 Difference]: Without dead ends: 702 [2022-12-13 14:41:16,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-12-13 14:41:16,584 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 500 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 1400 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:16,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [502 Valid, 1400 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 14:41:16,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-12-13 14:41:16,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 336. [2022-12-13 14:41:16,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 263 states have (on average 1.6577946768060836) internal successors, (436), 323 states have internal predecessors, (436), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-12-13 14:41:16,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 460 transitions. [2022-12-13 14:41:16,592 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 460 transitions. Word has length 21 [2022-12-13 14:41:16,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:16,592 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 460 transitions. [2022-12-13 14:41:16,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:16,593 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 460 transitions. [2022-12-13 14:41:16,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 14:41:16,593 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:16,594 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:16,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 14:41:16,594 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:16,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:16,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1380079796, now seen corresponding path program 1 times [2022-12-13 14:41:16,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:16,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12673521] [2022-12-13 14:41:16,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:16,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:16,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:16,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:16,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:16,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:16,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12673521] [2022-12-13 14:41:16,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12673521] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:16,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:16,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 14:41:16,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762346537] [2022-12-13 14:41:16,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:16,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 14:41:16,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:16,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 14:41:16,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-13 14:41:16,807 INFO L87 Difference]: Start difference. First operand 336 states and 460 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:17,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:17,100 INFO L93 Difference]: Finished difference Result 512 states and 672 transitions. [2022-12-13 14:41:17,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 14:41:17,100 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-12-13 14:41:17,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:17,101 INFO L225 Difference]: With dead ends: 512 [2022-12-13 14:41:17,101 INFO L226 Difference]: Without dead ends: 512 [2022-12-13 14:41:17,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-12-13 14:41:17,102 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 237 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:17,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 867 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 14:41:17,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-12-13 14:41:17,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 352. [2022-12-13 14:41:17,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 279 states have (on average 1.6308243727598566) internal successors, (455), 337 states have internal predecessors, (455), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2022-12-13 14:41:17,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 479 transitions. [2022-12-13 14:41:17,108 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 479 transitions. Word has length 21 [2022-12-13 14:41:17,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:17,108 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 479 transitions. [2022-12-13 14:41:17,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:17,109 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 479 transitions. [2022-12-13 14:41:17,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-13 14:41:17,109 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:17,109 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:17,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 14:41:17,110 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:17,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:17,110 INFO L85 PathProgramCache]: Analyzing trace with hash -43201481, now seen corresponding path program 1 times [2022-12-13 14:41:17,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:17,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216130156] [2022-12-13 14:41:17,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:17,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:17,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:17,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:17,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:17,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:17,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216130156] [2022-12-13 14:41:17,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216130156] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:17,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:17,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 14:41:17,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648564644] [2022-12-13 14:41:17,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:17,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 14:41:17,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:17,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 14:41:17,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 14:41:17,177 INFO L87 Difference]: Start difference. First operand 352 states and 479 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:17,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:17,254 INFO L93 Difference]: Finished difference Result 602 states and 821 transitions. [2022-12-13 14:41:17,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 14:41:17,255 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-12-13 14:41:17,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:17,258 INFO L225 Difference]: With dead ends: 602 [2022-12-13 14:41:17,259 INFO L226 Difference]: Without dead ends: 602 [2022-12-13 14:41:17,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-13 14:41:17,259 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 227 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:17,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 1071 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:41:17,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2022-12-13 14:41:17,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 354. [2022-12-13 14:41:17,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 281 states have (on average 1.6263345195729537) internal successors, (457), 339 states have internal predecessors, (457), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2022-12-13 14:41:17,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 481 transitions. [2022-12-13 14:41:17,266 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 481 transitions. Word has length 22 [2022-12-13 14:41:17,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:17,266 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 481 transitions. [2022-12-13 14:41:17,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:17,266 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 481 transitions. [2022-12-13 14:41:17,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-13 14:41:17,267 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:17,267 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:17,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 14:41:17,267 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:17,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:17,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1731805881, now seen corresponding path program 1 times [2022-12-13 14:41:17,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:17,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122897231] [2022-12-13 14:41:17,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:17,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:17,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:17,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:17,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:17,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:17,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:17,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122897231] [2022-12-13 14:41:17,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122897231] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:17,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:17,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 14:41:17,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734860961] [2022-12-13 14:41:17,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:17,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 14:41:17,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:17,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 14:41:17,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 14:41:17,345 INFO L87 Difference]: Start difference. First operand 354 states and 481 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:17,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:17,428 INFO L93 Difference]: Finished difference Result 598 states and 813 transitions. [2022-12-13 14:41:17,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 14:41:17,428 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-12-13 14:41:17,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:17,429 INFO L225 Difference]: With dead ends: 598 [2022-12-13 14:41:17,430 INFO L226 Difference]: Without dead ends: 598 [2022-12-13 14:41:17,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-13 14:41:17,430 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 224 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:17,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 1091 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:41:17,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-12-13 14:41:17,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 352. [2022-12-13 14:41:17,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 279 states have (on average 1.6164874551971327) internal successors, (451), 337 states have internal predecessors, (451), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2022-12-13 14:41:17,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 475 transitions. [2022-12-13 14:41:17,437 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 475 transitions. Word has length 22 [2022-12-13 14:41:17,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:17,437 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 475 transitions. [2022-12-13 14:41:17,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:17,438 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 475 transitions. [2022-12-13 14:41:17,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-13 14:41:17,438 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:17,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:17,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 14:41:17,438 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:17,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:17,439 INFO L85 PathProgramCache]: Analyzing trace with hash -548760106, now seen corresponding path program 1 times [2022-12-13 14:41:17,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:17,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834142416] [2022-12-13 14:41:17,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:17,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:17,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:17,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:17,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:17,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:17,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834142416] [2022-12-13 14:41:17,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834142416] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:17,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:17,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 14:41:17,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422764710] [2022-12-13 14:41:17,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:17,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 14:41:17,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:17,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 14:41:17,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-13 14:41:17,587 INFO L87 Difference]: Start difference. First operand 352 states and 475 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:17,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:17,847 INFO L93 Difference]: Finished difference Result 532 states and 702 transitions. [2022-12-13 14:41:17,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 14:41:17,848 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-12-13 14:41:17,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:17,849 INFO L225 Difference]: With dead ends: 532 [2022-12-13 14:41:17,849 INFO L226 Difference]: Without dead ends: 532 [2022-12-13 14:41:17,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-12-13 14:41:17,850 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 185 mSDsluCounter, 910 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1096 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:17,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 1096 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 14:41:17,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-12-13 14:41:17,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 362. [2022-12-13 14:41:17,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 289 states have (on average 1.602076124567474) internal successors, (463), 345 states have internal predecessors, (463), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-12-13 14:41:17,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 487 transitions. [2022-12-13 14:41:17,856 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 487 transitions. Word has length 22 [2022-12-13 14:41:17,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:17,856 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 487 transitions. [2022-12-13 14:41:17,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:17,857 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 487 transitions. [2022-12-13 14:41:17,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-13 14:41:17,857 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:17,857 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:17,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 14:41:17,857 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:17,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:17,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1581850198, now seen corresponding path program 1 times [2022-12-13 14:41:17,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:17,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779119059] [2022-12-13 14:41:17,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:17,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:17,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:17,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 14:41:17,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:17,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:17,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779119059] [2022-12-13 14:41:17,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779119059] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:17,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:17,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 14:41:17,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311876210] [2022-12-13 14:41:17,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:17,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:41:17,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:17,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:41:17,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:41:17,892 INFO L87 Difference]: Start difference. First operand 362 states and 487 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:18,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:18,037 INFO L93 Difference]: Finished difference Result 639 states and 842 transitions. [2022-12-13 14:41:18,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:41:18,038 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-12-13 14:41:18,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:18,040 INFO L225 Difference]: With dead ends: 639 [2022-12-13 14:41:18,040 INFO L226 Difference]: Without dead ends: 639 [2022-12-13 14:41:18,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:41:18,041 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 510 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:18,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 497 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:41:18,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-12-13 14:41:18,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 357. [2022-12-13 14:41:18,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 290 states have (on average 1.5689655172413792) internal successors, (455), 340 states have internal predecessors, (455), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-12-13 14:41:18,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 479 transitions. [2022-12-13 14:41:18,050 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 479 transitions. Word has length 23 [2022-12-13 14:41:18,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:18,051 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 479 transitions. [2022-12-13 14:41:18,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:18,051 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 479 transitions. [2022-12-13 14:41:18,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-13 14:41:18,051 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:18,051 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:18,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 14:41:18,052 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:18,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:18,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1581850197, now seen corresponding path program 1 times [2022-12-13 14:41:18,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:18,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664081284] [2022-12-13 14:41:18,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:18,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:18,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:18,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 14:41:18,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:18,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:18,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:18,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664081284] [2022-12-13 14:41:18,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664081284] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:18,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:18,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 14:41:18,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842051243] [2022-12-13 14:41:18,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:18,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:41:18,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:18,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:41:18,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:41:18,142 INFO L87 Difference]: Start difference. First operand 357 states and 479 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:18,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:18,251 INFO L93 Difference]: Finished difference Result 409 states and 549 transitions. [2022-12-13 14:41:18,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 14:41:18,252 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-12-13 14:41:18,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:18,252 INFO L225 Difference]: With dead ends: 409 [2022-12-13 14:41:18,253 INFO L226 Difference]: Without dead ends: 409 [2022-12-13 14:41:18,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 14:41:18,253 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 153 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:18,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 388 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:41:18,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-12-13 14:41:18,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 354. [2022-12-13 14:41:18,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 290 states have (on average 1.5448275862068965) internal successors, (448), 337 states have internal predecessors, (448), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-12-13 14:41:18,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 472 transitions. [2022-12-13 14:41:18,258 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 472 transitions. Word has length 23 [2022-12-13 14:41:18,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:18,258 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 472 transitions. [2022-12-13 14:41:18,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:18,259 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 472 transitions. [2022-12-13 14:41:18,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-13 14:41:18,259 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:18,259 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:18,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-13 14:41:18,259 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:18,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:18,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1433519231, now seen corresponding path program 1 times [2022-12-13 14:41:18,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:18,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517854587] [2022-12-13 14:41:18,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:18,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:18,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:18,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:18,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:18,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:18,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517854587] [2022-12-13 14:41:18,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517854587] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:18,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:18,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 14:41:18,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137907139] [2022-12-13 14:41:18,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:18,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:41:18,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:18,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:41:18,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:41:18,282 INFO L87 Difference]: Start difference. First operand 354 states and 472 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:18,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:18,297 INFO L93 Difference]: Finished difference Result 370 states and 488 transitions. [2022-12-13 14:41:18,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 14:41:18,297 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-12-13 14:41:18,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:18,299 INFO L225 Difference]: With dead ends: 370 [2022-12-13 14:41:18,299 INFO L226 Difference]: Without dead ends: 370 [2022-12-13 14:41:18,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:41:18,299 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 3 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:18,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 472 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:41:18,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-12-13 14:41:18,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 366. [2022-12-13 14:41:18,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 302 states have (on average 1.5231788079470199) internal successors, (460), 349 states have internal predecessors, (460), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-12-13 14:41:18,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 484 transitions. [2022-12-13 14:41:18,304 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 484 transitions. Word has length 25 [2022-12-13 14:41:18,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:18,304 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 484 transitions. [2022-12-13 14:41:18,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:18,305 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 484 transitions. [2022-12-13 14:41:18,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-13 14:41:18,305 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:18,305 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:18,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-13 14:41:18,305 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:18,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:18,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1431672189, now seen corresponding path program 1 times [2022-12-13 14:41:18,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:18,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369239227] [2022-12-13 14:41:18,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:18,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:18,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:18,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:18,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:18,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:18,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:18,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369239227] [2022-12-13 14:41:18,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369239227] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:18,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:18,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:41:18,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972236468] [2022-12-13 14:41:18,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:18,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:41:18,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:18,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:41:18,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:41:18,358 INFO L87 Difference]: Start difference. First operand 366 states and 484 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:18,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:18,509 INFO L93 Difference]: Finished difference Result 704 states and 925 transitions. [2022-12-13 14:41:18,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:41:18,510 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-12-13 14:41:18,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:18,511 INFO L225 Difference]: With dead ends: 704 [2022-12-13 14:41:18,511 INFO L226 Difference]: Without dead ends: 704 [2022-12-13 14:41:18,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:41:18,512 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 285 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:18,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 444 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:41:18,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-12-13 14:41:18,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 442. [2022-12-13 14:41:18,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 378 states have (on average 1.5132275132275133) internal successors, (572), 425 states have internal predecessors, (572), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-12-13 14:41:18,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 596 transitions. [2022-12-13 14:41:18,519 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 596 transitions. Word has length 25 [2022-12-13 14:41:18,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:18,519 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 596 transitions. [2022-12-13 14:41:18,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:18,519 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 596 transitions. [2022-12-13 14:41:18,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-13 14:41:18,519 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:18,519 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:18,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-12-13 14:41:18,520 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:18,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:18,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1431672190, now seen corresponding path program 1 times [2022-12-13 14:41:18,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:18,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653818005] [2022-12-13 14:41:18,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:18,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:18,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:18,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:18,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:18,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:18,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653818005] [2022-12-13 14:41:18,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653818005] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:18,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:18,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 14:41:18,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790245595] [2022-12-13 14:41:18,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:18,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 14:41:18,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:18,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 14:41:18,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:41:18,543 INFO L87 Difference]: Start difference. First operand 442 states and 596 transitions. Second operand has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:18,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:18,609 INFO L93 Difference]: Finished difference Result 512 states and 667 transitions. [2022-12-13 14:41:18,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 14:41:18,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-12-13 14:41:18,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:18,611 INFO L225 Difference]: With dead ends: 512 [2022-12-13 14:41:18,611 INFO L226 Difference]: Without dead ends: 512 [2022-12-13 14:41:18,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 14:41:18,612 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 126 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:18,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 233 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:41:18,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-12-13 14:41:18,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 440. [2022-12-13 14:41:18,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 378 states have (on average 1.4814814814814814) internal successors, (560), 423 states have internal predecessors, (560), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-12-13 14:41:18,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 584 transitions. [2022-12-13 14:41:18,622 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 584 transitions. Word has length 25 [2022-12-13 14:41:18,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:18,622 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 584 transitions. [2022-12-13 14:41:18,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.5) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:18,622 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 584 transitions. [2022-12-13 14:41:18,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 14:41:18,623 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:18,623 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:18,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-13 14:41:18,623 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:18,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:18,623 INFO L85 PathProgramCache]: Analyzing trace with hash -517911170, now seen corresponding path program 1 times [2022-12-13 14:41:18,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:18,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175718952] [2022-12-13 14:41:18,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:18,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:18,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 14:41:18,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:18,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:18,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:18,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175718952] [2022-12-13 14:41:18,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175718952] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:18,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:18,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 14:41:18,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516213281] [2022-12-13 14:41:18,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:18,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 14:41:18,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:18,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 14:41:18,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:41:18,719 INFO L87 Difference]: Start difference. First operand 440 states and 584 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:18,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:18,996 INFO L93 Difference]: Finished difference Result 1078 states and 1436 transitions. [2022-12-13 14:41:18,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 14:41:18,996 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-12-13 14:41:18,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:18,999 INFO L225 Difference]: With dead ends: 1078 [2022-12-13 14:41:18,999 INFO L226 Difference]: Without dead ends: 1078 [2022-12-13 14:41:18,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-12-13 14:41:19,000 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 449 mSDsluCounter, 1186 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 1488 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:19,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 1488 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 14:41:19,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2022-12-13 14:41:19,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 495. [2022-12-13 14:41:19,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 433 states have (on average 1.4595842956120093) internal successors, (632), 474 states have internal predecessors, (632), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 16 states have call predecessors, (16), 8 states have call successors, (16) [2022-12-13 14:41:19,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 656 transitions. [2022-12-13 14:41:19,012 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 656 transitions. Word has length 26 [2022-12-13 14:41:19,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:19,012 INFO L495 AbstractCegarLoop]: Abstraction has 495 states and 656 transitions. [2022-12-13 14:41:19,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:19,013 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 656 transitions. [2022-12-13 14:41:19,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 14:41:19,013 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:19,013 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:19,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-13 14:41:19,014 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:19,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:19,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1028445347, now seen corresponding path program 1 times [2022-12-13 14:41:19,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:19,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145202154] [2022-12-13 14:41:19,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:19,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:19,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:19,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 14:41:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:19,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:19,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:19,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145202154] [2022-12-13 14:41:19,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145202154] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:19,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:19,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 14:41:19,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319274213] [2022-12-13 14:41:19,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:19,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 14:41:19,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:19,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 14:41:19,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:41:19,111 INFO L87 Difference]: Start difference. First operand 495 states and 656 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:19,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:19,390 INFO L93 Difference]: Finished difference Result 1076 states and 1434 transitions. [2022-12-13 14:41:19,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 14:41:19,391 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-12-13 14:41:19,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:19,394 INFO L225 Difference]: With dead ends: 1076 [2022-12-13 14:41:19,394 INFO L226 Difference]: Without dead ends: 1076 [2022-12-13 14:41:19,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-12-13 14:41:19,395 INFO L413 NwaCegarLoop]: 381 mSDtfsCounter, 428 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 1695 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:19,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 1695 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 14:41:19,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2022-12-13 14:41:19,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 438. [2022-12-13 14:41:19,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 378 states have (on average 1.4761904761904763) internal successors, (558), 421 states have internal predecessors, (558), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-12-13 14:41:19,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 582 transitions. [2022-12-13 14:41:19,407 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 582 transitions. Word has length 26 [2022-12-13 14:41:19,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:19,407 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 582 transitions. [2022-12-13 14:41:19,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:19,407 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 582 transitions. [2022-12-13 14:41:19,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 14:41:19,407 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:19,408 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:19,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-12-13 14:41:19,408 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:19,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:19,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1470694413, now seen corresponding path program 1 times [2022-12-13 14:41:19,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:19,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844949439] [2022-12-13 14:41:19,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:19,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:19,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:19,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:19,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:19,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:19,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844949439] [2022-12-13 14:41:19,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844949439] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:19,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:19,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:41:19,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571077461] [2022-12-13 14:41:19,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:19,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:41:19,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:19,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:41:19,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:41:19,473 INFO L87 Difference]: Start difference. First operand 438 states and 582 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:19,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:19,620 INFO L93 Difference]: Finished difference Result 770 states and 1011 transitions. [2022-12-13 14:41:19,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:41:19,620 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-12-13 14:41:19,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:19,623 INFO L225 Difference]: With dead ends: 770 [2022-12-13 14:41:19,623 INFO L226 Difference]: Without dead ends: 770 [2022-12-13 14:41:19,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:41:19,623 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 329 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:19,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 406 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:41:19,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-12-13 14:41:19,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 438. [2022-12-13 14:41:19,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 378 states have (on average 1.4761904761904763) internal successors, (558), 421 states have internal predecessors, (558), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-12-13 14:41:19,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 582 transitions. [2022-12-13 14:41:19,629 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 582 transitions. Word has length 26 [2022-12-13 14:41:19,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:19,629 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 582 transitions. [2022-12-13 14:41:19,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:19,630 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 582 transitions. [2022-12-13 14:41:19,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 14:41:19,630 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:19,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:19,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-12-13 14:41:19,630 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:19,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:19,630 INFO L85 PathProgramCache]: Analyzing trace with hash -2123208305, now seen corresponding path program 1 times [2022-12-13 14:41:19,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:19,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410887497] [2022-12-13 14:41:19,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:19,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:19,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:19,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:19,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:19,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:19,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410887497] [2022-12-13 14:41:19,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410887497] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:19,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:19,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 14:41:19,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980033843] [2022-12-13 14:41:19,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:19,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 14:41:19,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:19,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 14:41:19,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 14:41:19,701 INFO L87 Difference]: Start difference. First operand 438 states and 582 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:19,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:19,752 INFO L93 Difference]: Finished difference Result 612 states and 801 transitions. [2022-12-13 14:41:19,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 14:41:19,752 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-12-13 14:41:19,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:19,753 INFO L225 Difference]: With dead ends: 612 [2022-12-13 14:41:19,753 INFO L226 Difference]: Without dead ends: 612 [2022-12-13 14:41:19,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-13 14:41:19,754 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 208 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 1267 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:19,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 1267 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 14:41:19,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-12-13 14:41:19,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 361. [2022-12-13 14:41:19,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 302 states have (on average 1.4635761589403973) internal successors, (442), 344 states have internal predecessors, (442), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-12-13 14:41:19,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 466 transitions. [2022-12-13 14:41:19,759 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 466 transitions. Word has length 26 [2022-12-13 14:41:19,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:19,759 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 466 transitions. [2022-12-13 14:41:19,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:19,759 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 466 transitions. [2022-12-13 14:41:19,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 14:41:19,759 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:19,759 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:19,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-12-13 14:41:19,760 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:19,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:19,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1124600241, now seen corresponding path program 1 times [2022-12-13 14:41:19,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:19,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385840071] [2022-12-13 14:41:19,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:19,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:19,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:19,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 14:41:19,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:19,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:19,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:19,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385840071] [2022-12-13 14:41:19,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385840071] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:19,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:19,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 14:41:19,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526461604] [2022-12-13 14:41:19,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:19,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:41:19,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:19,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:41:19,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:41:19,835 INFO L87 Difference]: Start difference. First operand 361 states and 466 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:19,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:19,966 INFO L93 Difference]: Finished difference Result 421 states and 523 transitions. [2022-12-13 14:41:19,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:41:19,967 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-12-13 14:41:19,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:19,969 INFO L225 Difference]: With dead ends: 421 [2022-12-13 14:41:19,969 INFO L226 Difference]: Without dead ends: 421 [2022-12-13 14:41:19,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:41:19,970 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 137 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:19,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 579 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:41:19,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-12-13 14:41:19,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 361. [2022-12-13 14:41:19,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 302 states have (on average 1.4602649006622517) internal successors, (441), 344 states have internal predecessors, (441), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-12-13 14:41:19,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 465 transitions. [2022-12-13 14:41:19,974 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 465 transitions. Word has length 27 [2022-12-13 14:41:19,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:19,974 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 465 transitions. [2022-12-13 14:41:19,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:19,974 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 465 transitions. [2022-12-13 14:41:19,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 14:41:19,975 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:19,975 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:19,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-12-13 14:41:19,975 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:19,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:19,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1447437661, now seen corresponding path program 1 times [2022-12-13 14:41:19,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:19,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383693166] [2022-12-13 14:41:19,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:19,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:20,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:20,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:20,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:20,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:20,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383693166] [2022-12-13 14:41:20,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383693166] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:20,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:20,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 14:41:20,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114754032] [2022-12-13 14:41:20,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:20,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 14:41:20,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:20,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 14:41:20,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:41:20,051 INFO L87 Difference]: Start difference. First operand 361 states and 465 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:20,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:20,234 INFO L93 Difference]: Finished difference Result 535 states and 682 transitions. [2022-12-13 14:41:20,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 14:41:20,234 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-12-13 14:41:20,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:20,237 INFO L225 Difference]: With dead ends: 535 [2022-12-13 14:41:20,237 INFO L226 Difference]: Without dead ends: 535 [2022-12-13 14:41:20,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-12-13 14:41:20,238 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 134 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:20,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 1059 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:41:20,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-12-13 14:41:20,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 393. [2022-12-13 14:41:20,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 334 states have (on average 1.4341317365269461) internal successors, (479), 376 states have internal predecessors, (479), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-12-13 14:41:20,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 503 transitions. [2022-12-13 14:41:20,243 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 503 transitions. Word has length 27 [2022-12-13 14:41:20,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:20,243 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 503 transitions. [2022-12-13 14:41:20,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:20,243 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 503 transitions. [2022-12-13 14:41:20,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 14:41:20,243 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:20,243 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:20,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-13 14:41:20,243 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:20,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:20,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1447437467, now seen corresponding path program 1 times [2022-12-13 14:41:20,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:20,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852349032] [2022-12-13 14:41:20,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:20,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:20,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:20,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:20,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:20,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:20,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:20,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852349032] [2022-12-13 14:41:20,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852349032] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:20,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:20,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 14:41:20,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779593528] [2022-12-13 14:41:20,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:20,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:41:20,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:20,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:41:20,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:41:20,308 INFO L87 Difference]: Start difference. First operand 393 states and 503 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:20,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:20,445 INFO L93 Difference]: Finished difference Result 756 states and 962 transitions. [2022-12-13 14:41:20,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 14:41:20,446 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-12-13 14:41:20,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:20,447 INFO L225 Difference]: With dead ends: 756 [2022-12-13 14:41:20,447 INFO L226 Difference]: Without dead ends: 756 [2022-12-13 14:41:20,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-12-13 14:41:20,447 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 388 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:20,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 564 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:41:20,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2022-12-13 14:41:20,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 509. [2022-12-13 14:41:20,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 450 states have (on average 1.4244444444444444) internal successors, (641), 492 states have internal predecessors, (641), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (16), 12 states have call predecessors, (16), 8 states have call successors, (16) [2022-12-13 14:41:20,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 665 transitions. [2022-12-13 14:41:20,456 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 665 transitions. Word has length 27 [2022-12-13 14:41:20,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:20,456 INFO L495 AbstractCegarLoop]: Abstraction has 509 states and 665 transitions. [2022-12-13 14:41:20,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:20,456 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 665 transitions. [2022-12-13 14:41:20,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 14:41:20,457 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:20,457 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:20,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-12-13 14:41:20,457 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:20,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:20,457 INFO L85 PathProgramCache]: Analyzing trace with hash 503577342, now seen corresponding path program 1 times [2022-12-13 14:41:20,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:20,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164886293] [2022-12-13 14:41:20,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:20,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:20,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:20,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-12-13 14:41:20,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:20,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:20,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:20,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164886293] [2022-12-13 14:41:20,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164886293] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:20,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:20,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 14:41:20,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136935096] [2022-12-13 14:41:20,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:20,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 14:41:20,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:20,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 14:41:20,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-13 14:41:20,632 INFO L87 Difference]: Start difference. First operand 509 states and 665 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:20,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:20,878 INFO L93 Difference]: Finished difference Result 688 states and 883 transitions. [2022-12-13 14:41:20,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 14:41:20,878 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-12-13 14:41:20,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:20,879 INFO L225 Difference]: With dead ends: 688 [2022-12-13 14:41:20,879 INFO L226 Difference]: Without dead ends: 688 [2022-12-13 14:41:20,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2022-12-13 14:41:20,880 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 435 mSDsluCounter, 1175 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 1415 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:20,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 1415 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:41:20,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-12-13 14:41:20,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 452. [2022-12-13 14:41:20,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 397 states have (on average 1.438287153652393) internal successors, (571), 439 states have internal predecessors, (571), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2022-12-13 14:41:20,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 589 transitions. [2022-12-13 14:41:20,885 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 589 transitions. Word has length 28 [2022-12-13 14:41:20,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:20,885 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 589 transitions. [2022-12-13 14:41:20,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:20,886 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 589 transitions. [2022-12-13 14:41:20,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 14:41:20,886 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:20,886 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:20,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-12-13 14:41:20,886 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:20,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:20,886 INFO L85 PathProgramCache]: Analyzing trace with hash 293091951, now seen corresponding path program 1 times [2022-12-13 14:41:20,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:20,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691859759] [2022-12-13 14:41:20,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:20,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:20,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:20,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:20,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:20,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:20,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:20,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691859759] [2022-12-13 14:41:20,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691859759] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:20,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:20,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:41:20,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354692116] [2022-12-13 14:41:20,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:20,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:41:20,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:20,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:41:20,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:41:20,941 INFO L87 Difference]: Start difference. First operand 452 states and 589 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:21,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:21,071 INFO L93 Difference]: Finished difference Result 617 states and 784 transitions. [2022-12-13 14:41:21,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:41:21,071 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-12-13 14:41:21,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:21,074 INFO L225 Difference]: With dead ends: 617 [2022-12-13 14:41:21,074 INFO L226 Difference]: Without dead ends: 617 [2022-12-13 14:41:21,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:41:21,074 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 271 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:21,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 353 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:41:21,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-12-13 14:41:21,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 339. [2022-12-13 14:41:21,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 285 states have (on average 1.424561403508772) internal successors, (406), 326 states have internal predecessors, (406), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2022-12-13 14:41:21,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 424 transitions. [2022-12-13 14:41:21,079 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 424 transitions. Word has length 28 [2022-12-13 14:41:21,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:21,079 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 424 transitions. [2022-12-13 14:41:21,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:21,080 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 424 transitions. [2022-12-13 14:41:21,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-13 14:41:21,080 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:21,080 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:21,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-12-13 14:41:21,080 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:21,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:21,080 INFO L85 PathProgramCache]: Analyzing trace with hash -417408815, now seen corresponding path program 1 times [2022-12-13 14:41:21,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:21,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154201228] [2022-12-13 14:41:21,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:21,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:21,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:21,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:21,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:21,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:21,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:21,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154201228] [2022-12-13 14:41:21,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154201228] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:21,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:21,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 14:41:21,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908507828] [2022-12-13 14:41:21,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:21,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:41:21,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:21,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:41:21,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:41:21,156 INFO L87 Difference]: Start difference. First operand 339 states and 424 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:21,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:21,257 INFO L93 Difference]: Finished difference Result 338 states and 422 transitions. [2022-12-13 14:41:21,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 14:41:21,257 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-12-13 14:41:21,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:21,258 INFO L225 Difference]: With dead ends: 338 [2022-12-13 14:41:21,258 INFO L226 Difference]: Without dead ends: 338 [2022-12-13 14:41:21,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:41:21,259 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 321 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:21,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 259 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:41:21,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-12-13 14:41:21,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 338. [2022-12-13 14:41:21,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 285 states have (on average 1.4175438596491228) internal successors, (404), 325 states have internal predecessors, (404), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2022-12-13 14:41:21,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 422 transitions. [2022-12-13 14:41:21,264 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 422 transitions. Word has length 33 [2022-12-13 14:41:21,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:21,265 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 422 transitions. [2022-12-13 14:41:21,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:21,265 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 422 transitions. [2022-12-13 14:41:21,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-13 14:41:21,265 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:21,265 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:21,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-12-13 14:41:21,266 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:21,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:21,266 INFO L85 PathProgramCache]: Analyzing trace with hash -417408816, now seen corresponding path program 1 times [2022-12-13 14:41:21,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:21,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312754682] [2022-12-13 14:41:21,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:21,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:21,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:21,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:21,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:21,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:21,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:21,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312754682] [2022-12-13 14:41:21,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312754682] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:21,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:21,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 14:41:21,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101245788] [2022-12-13 14:41:21,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:21,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:41:21,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:21,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:41:21,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:41:21,308 INFO L87 Difference]: Start difference. First operand 338 states and 422 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:21,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:21,422 INFO L93 Difference]: Finished difference Result 407 states and 501 transitions. [2022-12-13 14:41:21,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 14:41:21,423 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-12-13 14:41:21,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:21,424 INFO L225 Difference]: With dead ends: 407 [2022-12-13 14:41:21,424 INFO L226 Difference]: Without dead ends: 407 [2022-12-13 14:41:21,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:41:21,425 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 294 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:21,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 373 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:41:21,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-12-13 14:41:21,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 337. [2022-12-13 14:41:21,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 285 states have (on average 1.4105263157894736) internal successors, (402), 324 states have internal predecessors, (402), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2022-12-13 14:41:21,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 420 transitions. [2022-12-13 14:41:21,431 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 420 transitions. Word has length 33 [2022-12-13 14:41:21,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:21,431 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 420 transitions. [2022-12-13 14:41:21,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:21,431 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 420 transitions. [2022-12-13 14:41:21,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-13 14:41:21,431 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:21,432 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:21,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-12-13 14:41:21,432 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:21,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:21,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1697910415, now seen corresponding path program 1 times [2022-12-13 14:41:21,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:21,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614344124] [2022-12-13 14:41:21,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:21,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:21,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:21,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:21,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:21,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:21,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:21,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614344124] [2022-12-13 14:41:21,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614344124] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:21,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:21,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 14:41:21,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832962623] [2022-12-13 14:41:21,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:21,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 14:41:21,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:21,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 14:41:21,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:41:21,484 INFO L87 Difference]: Start difference. First operand 337 states and 420 transitions. Second operand has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:21,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:21,651 INFO L93 Difference]: Finished difference Result 608 states and 733 transitions. [2022-12-13 14:41:21,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 14:41:21,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-12-13 14:41:21,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:21,655 INFO L225 Difference]: With dead ends: 608 [2022-12-13 14:41:21,655 INFO L226 Difference]: Without dead ends: 608 [2022-12-13 14:41:21,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:41:21,656 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 365 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:21,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 467 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 14:41:21,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-12-13 14:41:21,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 334. [2022-12-13 14:41:21,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 285 states have (on average 1.3894736842105264) internal successors, (396), 321 states have internal predecessors, (396), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2022-12-13 14:41:21,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 414 transitions. [2022-12-13 14:41:21,661 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 414 transitions. Word has length 35 [2022-12-13 14:41:21,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:21,661 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 414 transitions. [2022-12-13 14:41:21,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:21,661 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 414 transitions. [2022-12-13 14:41:21,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-13 14:41:21,661 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:21,661 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:21,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-12-13 14:41:21,662 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:21,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:21,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1697910414, now seen corresponding path program 1 times [2022-12-13 14:41:21,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:21,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760412744] [2022-12-13 14:41:21,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:21,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:21,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:21,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:21,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:21,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:21,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:21,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760412744] [2022-12-13 14:41:21,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760412744] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:21,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:21,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 14:41:21,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946176829] [2022-12-13 14:41:21,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:21,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 14:41:21,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:21,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 14:41:21,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 14:41:21,763 INFO L87 Difference]: Start difference. First operand 334 states and 414 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:21,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:21,932 INFO L93 Difference]: Finished difference Result 466 states and 567 transitions. [2022-12-13 14:41:21,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 14:41:21,932 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-12-13 14:41:21,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:21,934 INFO L225 Difference]: With dead ends: 466 [2022-12-13 14:41:21,935 INFO L226 Difference]: Without dead ends: 466 [2022-12-13 14:41:21,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-13 14:41:21,935 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 585 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:21,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 429 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:41:21,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-12-13 14:41:21,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 333. [2022-12-13 14:41:21,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 285 states have (on average 1.3824561403508773) internal successors, (394), 320 states have internal predecessors, (394), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2022-12-13 14:41:21,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 412 transitions. [2022-12-13 14:41:21,940 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 412 transitions. Word has length 35 [2022-12-13 14:41:21,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:21,940 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 412 transitions. [2022-12-13 14:41:21,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 6 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:21,941 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 412 transitions. [2022-12-13 14:41:21,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-13 14:41:21,941 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:21,941 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:21,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-12-13 14:41:21,941 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:21,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:21,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1697910253, now seen corresponding path program 1 times [2022-12-13 14:41:21,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:21,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891309816] [2022-12-13 14:41:21,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:21,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:21,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:22,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:22,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:22,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:22,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:22,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891309816] [2022-12-13 14:41:22,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891309816] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:22,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:22,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 14:41:22,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104569854] [2022-12-13 14:41:22,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:22,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 14:41:22,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:22,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 14:41:22,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 14:41:22,066 INFO L87 Difference]: Start difference. First operand 333 states and 412 transitions. Second operand has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:22,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:22,140 INFO L93 Difference]: Finished difference Result 331 states and 408 transitions. [2022-12-13 14:41:22,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 14:41:22,140 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-12-13 14:41:22,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:22,141 INFO L225 Difference]: With dead ends: 331 [2022-12-13 14:41:22,141 INFO L226 Difference]: Without dead ends: 331 [2022-12-13 14:41:22,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 14:41:22,142 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 256 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:22,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 144 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:41:22,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-12-13 14:41:22,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2022-12-13 14:41:22,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 285 states have (on average 1.368421052631579) internal successors, (390), 318 states have internal predecessors, (390), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2022-12-13 14:41:22,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 408 transitions. [2022-12-13 14:41:22,145 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 408 transitions. Word has length 35 [2022-12-13 14:41:22,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:22,145 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 408 transitions. [2022-12-13 14:41:22,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:22,145 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 408 transitions. [2022-12-13 14:41:22,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-13 14:41:22,146 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:22,146 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:22,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-12-13 14:41:22,146 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:22,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:22,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1314168092, now seen corresponding path program 1 times [2022-12-13 14:41:22,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:22,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353415546] [2022-12-13 14:41:22,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:22,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:22,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:24,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:24,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:24,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:24,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:24,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353415546] [2022-12-13 14:41:24,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353415546] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:24,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:24,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-12-13 14:41:24,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173861420] [2022-12-13 14:41:24,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:24,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 14:41:24,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:24,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 14:41:24,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-12-13 14:41:24,153 INFO L87 Difference]: Start difference. First operand 331 states and 408 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:25,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:25,073 INFO L93 Difference]: Finished difference Result 363 states and 441 transitions. [2022-12-13 14:41:25,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 14:41:25,074 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-12-13 14:41:25,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:25,074 INFO L225 Difference]: With dead ends: 363 [2022-12-13 14:41:25,074 INFO L226 Difference]: Without dead ends: 363 [2022-12-13 14:41:25,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2022-12-13 14:41:25,075 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 133 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1200 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:25,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 1200 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 14:41:25,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-12-13 14:41:25,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 353. [2022-12-13 14:41:25,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 307 states have (on average 1.3452768729641693) internal successors, (413), 340 states have internal predecessors, (413), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2022-12-13 14:41:25,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 431 transitions. [2022-12-13 14:41:25,078 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 431 transitions. Word has length 49 [2022-12-13 14:41:25,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:25,078 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 431 transitions. [2022-12-13 14:41:25,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:25,078 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 431 transitions. [2022-12-13 14:41:25,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-13 14:41:25,079 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:25,079 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:25,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-12-13 14:41:25,079 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:25,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:25,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1837653963, now seen corresponding path program 1 times [2022-12-13 14:41:25,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:25,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286997422] [2022-12-13 14:41:25,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:25,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:25,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:25,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:25,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:25,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:25,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:25,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286997422] [2022-12-13 14:41:25,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286997422] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:41:25,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858863262] [2022-12-13 14:41:25,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:25,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:41:25,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:41:25,602 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:41:25,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 14:41:25,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:25,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 14:41:25,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:41:25,781 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 14:41:25,782 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 11 treesize of output 11 [2022-12-13 14:41:25,956 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 14:41:25,960 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 14:41:26,006 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 18 treesize of output 20 [2022-12-13 14:41:26,013 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 18 treesize of output 20 [2022-12-13 14:41:26,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 19 treesize of output 7 [2022-12-13 14:41:26,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 19 treesize of output 7 [2022-12-13 14:41:26,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:26,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:41:26,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858863262] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:26,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:41:26,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [14] total 24 [2022-12-13 14:41:26,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965621357] [2022-12-13 14:41:26,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:26,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 14:41:26,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:26,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 14:41:26,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2022-12-13 14:41:26,133 INFO L87 Difference]: Start difference. First operand 353 states and 431 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:26,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:26,799 INFO L93 Difference]: Finished difference Result 779 states and 896 transitions. [2022-12-13 14:41:26,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 14:41:26,799 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-12-13 14:41:26,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:26,802 INFO L225 Difference]: With dead ends: 779 [2022-12-13 14:41:26,802 INFO L226 Difference]: Without dead ends: 779 [2022-12-13 14:41:26,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2022-12-13 14:41:26,803 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 661 mSDsluCounter, 1320 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 1503 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:26,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [665 Valid, 1503 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 14:41:26,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-12-13 14:41:26,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 383. [2022-12-13 14:41:26,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 337 states have (on average 1.3293768545994065) internal successors, (448), 370 states have internal predecessors, (448), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2022-12-13 14:41:26,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 466 transitions. [2022-12-13 14:41:26,813 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 466 transitions. Word has length 50 [2022-12-13 14:41:26,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:26,813 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 466 transitions. [2022-12-13 14:41:26,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:26,813 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 466 transitions. [2022-12-13 14:41:26,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-13 14:41:26,814 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:26,814 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:26,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 14:41:27,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-13 14:41:27,015 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:27,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:27,016 INFO L85 PathProgramCache]: Analyzing trace with hash -457671058, now seen corresponding path program 1 times [2022-12-13 14:41:27,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:27,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019328590] [2022-12-13 14:41:27,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:27,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:27,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:28,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:28,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:28,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 14:41:28,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:28,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019328590] [2022-12-13 14:41:28,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019328590] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:28,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:28,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-12-13 14:41:28,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667597849] [2022-12-13 14:41:28,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:28,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 14:41:28,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:28,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 14:41:28,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-12-13 14:41:28,725 INFO L87 Difference]: Start difference. First operand 383 states and 466 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:30,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:30,183 INFO L93 Difference]: Finished difference Result 848 states and 1030 transitions. [2022-12-13 14:41:30,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 14:41:30,183 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-12-13 14:41:30,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:30,186 INFO L225 Difference]: With dead ends: 848 [2022-12-13 14:41:30,186 INFO L226 Difference]: Without dead ends: 848 [2022-12-13 14:41:30,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=202, Invalid=920, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 14:41:30,187 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 459 mSDsluCounter, 1803 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 2007 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:30,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 2007 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 14:41:30,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-12-13 14:41:30,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 535. [2022-12-13 14:41:30,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 481 states have (on average 1.32016632016632) internal successors, (635), 516 states have internal predecessors, (635), 10 states have call successors, (10), 5 states have call predecessors, (10), 10 states have return successors, (20), 13 states have call predecessors, (20), 10 states have call successors, (20) [2022-12-13 14:41:30,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 665 transitions. [2022-12-13 14:41:30,193 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 665 transitions. Word has length 50 [2022-12-13 14:41:30,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:30,193 INFO L495 AbstractCegarLoop]: Abstraction has 535 states and 665 transitions. [2022-12-13 14:41:30,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:30,193 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 665 transitions. [2022-12-13 14:41:30,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-13 14:41:30,193 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:30,194 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:30,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-12-13 14:41:30,194 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:30,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:30,194 INFO L85 PathProgramCache]: Analyzing trace with hash -455824016, now seen corresponding path program 1 times [2022-12-13 14:41:30,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:30,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535637806] [2022-12-13 14:41:30,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:30,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:30,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:30,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:30,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:30,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:30,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535637806] [2022-12-13 14:41:30,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535637806] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:30,516 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:30,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-13 14:41:30,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375322486] [2022-12-13 14:41:30,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:30,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 14:41:30,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:30,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 14:41:30,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-12-13 14:41:30,517 INFO L87 Difference]: Start difference. First operand 535 states and 665 transitions. Second operand has 13 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:31,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:31,295 INFO L93 Difference]: Finished difference Result 1338 states and 1665 transitions. [2022-12-13 14:41:31,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 14:41:31,295 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-12-13 14:41:31,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:31,300 INFO L225 Difference]: With dead ends: 1338 [2022-12-13 14:41:31,300 INFO L226 Difference]: Without dead ends: 1338 [2022-12-13 14:41:31,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2022-12-13 14:41:31,300 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 840 mSDsluCounter, 1679 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 1939 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:31,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [842 Valid, 1939 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 14:41:31,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1338 states. [2022-12-13 14:41:31,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1338 to 700. [2022-12-13 14:41:31,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 631 states have (on average 1.3280507131537242) internal successors, (838), 673 states have internal predecessors, (838), 18 states have call successors, (18), 9 states have call predecessors, (18), 18 states have return successors, (36), 17 states have call predecessors, (36), 18 states have call successors, (36) [2022-12-13 14:41:31,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 892 transitions. [2022-12-13 14:41:31,310 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 892 transitions. Word has length 50 [2022-12-13 14:41:31,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:31,310 INFO L495 AbstractCegarLoop]: Abstraction has 700 states and 892 transitions. [2022-12-13 14:41:31,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:31,310 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 892 transitions. [2022-12-13 14:41:31,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-13 14:41:31,311 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:31,311 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:31,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-12-13 14:41:31,311 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:31,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:31,311 INFO L85 PathProgramCache]: Analyzing trace with hash -455824015, now seen corresponding path program 1 times [2022-12-13 14:41:31,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:31,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170147899] [2022-12-13 14:41:31,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:31,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:31,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:32,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:32,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:32,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:32,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170147899] [2022-12-13 14:41:32,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170147899] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:41:32,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287026964] [2022-12-13 14:41:32,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:32,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:41:32,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:41:32,184 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:41:32,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 14:41:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:32,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 67 conjunts are in the unsatisfiable core [2022-12-13 14:41:32,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:41:32,437 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 14:41:32,438 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 11 treesize of output 11 [2022-12-13 14:41:32,673 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 16 treesize of output 18 [2022-12-13 14:41:32,680 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 16 treesize of output 18 [2022-12-13 14:41:32,718 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 16 treesize of output 18 [2022-12-13 14:41:32,725 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 16 treesize of output 18 [2022-12-13 14:41:32,809 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-12-13 14:41:32,809 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 1 case distinctions, treesize of input 21 treesize of output 26 [2022-12-13 14:41:32,820 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-12-13 14:41:32,820 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 21 treesize of output 20 [2022-12-13 14:41:33,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:41:33,341 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:41:33,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 53 [2022-12-13 14:41:33,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:41:33,351 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:41:33,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 52 [2022-12-13 14:41:33,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:33,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:41:33,989 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:41:33,990 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 96 treesize of output 100 [2022-12-13 14:41:34,058 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (* ~unnamed2~0~ITEM_PREV 4)) (.cse2 (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_END 4))) (.cse6 (+ |c_ULTIMATE.start_create_item_~item~0#1.offset| (* |c_ULTIMATE.start_create_item_~term_field~0#1| 4) 1))) (and (forall ((v_ArrVal_312 (Array Int Int))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_312))) (store .cse1 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse1 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|))) |c_~#list~0.base|) .cse2))) (or (= .cse0 |c_ULTIMATE.start_create_item_~item~0#1.base|) (= .cse0 0)))) (forall ((v_ArrVal_313 (Array Int Int))) (<= 0 (+ .cse3 (select (select (let ((.cse4 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_313))) (store .cse4 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse4 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.offset|))) |c_~#list~0.base|) .cse2)))) (forall ((v_ArrVal_313 (Array Int Int))) (let ((.cse5 (select (select (let ((.cse7 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_313))) (store .cse7 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse7 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.offset|))) |c_~#list~0.base|) .cse2))) (or (= .cse5 0) (< (+ .cse3 .cse5) .cse6)))) (or (forall ((v_ArrVal_313 (Array Int Int))) (= (select (select (let ((.cse8 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_313))) (store .cse8 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse8 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.offset|))) |c_~#list~0.base|) .cse2) 0)) (forall ((v_ArrVal_312 (Array Int Int))) (= (select (select (let ((.cse9 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_312))) (store .cse9 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse9 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|))) |c_~#list~0.base|) .cse2) |c_ULTIMATE.start_create_item_~item~0#1.base|))) (or (forall ((v_ArrVal_312 (Array Int Int))) (= (select (select (let ((.cse10 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_312))) (store .cse10 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse10 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|))) |c_~#list~0.base|) .cse2) 0)) (forall ((v_ArrVal_313 (Array Int Int))) (< (+ .cse3 (select (select (let ((.cse11 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_313))) (store .cse11 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse11 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.offset|))) |c_~#list~0.base|) .cse2)) .cse6))))) is different from false [2022-12-13 14:41:34,403 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (* ~unnamed2~0~ITEM_PREV 4)) (.cse2 (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_END 4))) (.cse6 (+ |c_ULTIMATE.start_create_item_~item~0#1.offset| (* ~unnamed2~0~ITEM_NEXT 4) 1))) (and (forall ((v_ArrVal_312 (Array Int Int))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_312))) (store .cse1 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse1 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|))) |c_~#list~0.base|) .cse2))) (or (= .cse0 |c_ULTIMATE.start_create_item_~item~0#1.base|) (= .cse0 0)))) (forall ((v_ArrVal_313 (Array Int Int))) (<= 0 (+ .cse3 (select (select (let ((.cse4 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_313))) (store .cse4 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse4 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.offset|))) |c_~#list~0.base|) .cse2)))) (forall ((v_ArrVal_313 (Array Int Int))) (let ((.cse5 (select (select (let ((.cse7 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_313))) (store .cse7 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse7 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.offset|))) |c_~#list~0.base|) .cse2))) (or (= .cse5 0) (< (+ .cse3 .cse5) .cse6)))) (or (forall ((v_ArrVal_313 (Array Int Int))) (= (select (select (let ((.cse8 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_313))) (store .cse8 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse8 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.offset|))) |c_~#list~0.base|) .cse2) 0)) (forall ((v_ArrVal_312 (Array Int Int))) (= (select (select (let ((.cse9 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_312))) (store .cse9 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse9 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|))) |c_~#list~0.base|) .cse2) |c_ULTIMATE.start_create_item_~item~0#1.base|))) (or (forall ((v_ArrVal_312 (Array Int Int))) (= (select (select (let ((.cse10 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_312))) (store .cse10 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse10 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|))) |c_~#list~0.base|) .cse2) 0)) (forall ((v_ArrVal_313 (Array Int Int))) (< (+ .cse3 (select (select (let ((.cse11 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| v_ArrVal_313))) (store .cse11 |c_ULTIMATE.start_create_item_~cursor#1.base| (store (select .cse11 |c_ULTIMATE.start_create_item_~cursor#1.base|) |c_ULTIMATE.start_create_item_~cursor#1.offset| |c_ULTIMATE.start_create_item_~item~0#1.offset|))) |c_~#list~0.base|) .cse2)) .cse6))))) is different from false [2022-12-13 14:41:35,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287026964] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:41:35,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:41:35,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 27 [2022-12-13 14:41:35,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447284960] [2022-12-13 14:41:35,001 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:41:35,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-13 14:41:35,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:35,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-13 14:41:35,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1108, Unknown=4, NotChecked=138, Total=1406 [2022-12-13 14:41:35,002 INFO L87 Difference]: Start difference. First operand 700 states and 892 transitions. Second operand has 28 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 26 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 14:41:37,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:37,688 INFO L93 Difference]: Finished difference Result 993 states and 1246 transitions. [2022-12-13 14:41:37,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 14:41:37,689 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 26 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2022-12-13 14:41:37,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:37,690 INFO L225 Difference]: With dead ends: 993 [2022-12-13 14:41:37,690 INFO L226 Difference]: Without dead ends: 993 [2022-12-13 14:41:37,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=429, Invalid=2326, Unknown=9, NotChecked=206, Total=2970 [2022-12-13 14:41:37,691 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 619 mSDsluCounter, 2237 mSDsCounter, 0 mSdLazyCounter, 1736 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 2385 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:37,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [619 Valid, 2385 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1736 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-13 14:41:37,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2022-12-13 14:41:37,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 798. [2022-12-13 14:41:37,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 721 states have (on average 1.3300970873786409) internal successors, (959), 767 states have internal predecessors, (959), 22 states have call successors, (22), 11 states have call predecessors, (22), 22 states have return successors, (44), 19 states have call predecessors, (44), 22 states have call successors, (44) [2022-12-13 14:41:37,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1025 transitions. [2022-12-13 14:41:37,704 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1025 transitions. Word has length 50 [2022-12-13 14:41:37,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:37,704 INFO L495 AbstractCegarLoop]: Abstraction has 798 states and 1025 transitions. [2022-12-13 14:41:37,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 26 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 14:41:37,704 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1025 transitions. [2022-12-13 14:41:37,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 14:41:37,705 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:37,705 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:37,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 14:41:37,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:41:37,907 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:37,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:37,909 INFO L85 PathProgramCache]: Analyzing trace with hash 267567628, now seen corresponding path program 1 times [2022-12-13 14:41:37,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:37,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521516658] [2022-12-13 14:41:37,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:37,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:37,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:38,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:38,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:38,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:38,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:38,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521516658] [2022-12-13 14:41:38,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521516658] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:41:38,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243229394] [2022-12-13 14:41:38,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:38,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:41:38,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:41:38,889 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:41:38,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 14:41:38,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:38,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 14:41:38,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:41:39,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 14:41:39,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 14:41:39,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:41:39,302 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 29 treesize of output 28 [2022-12-13 14:41:39,398 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 21 treesize of output 9 [2022-12-13 14:41:39,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:39,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:41:39,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243229394] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:39,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:41:39,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16] total 23 [2022-12-13 14:41:39,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052263757] [2022-12-13 14:41:39,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:39,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 14:41:39,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:39,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 14:41:39,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-12-13 14:41:39,403 INFO L87 Difference]: Start difference. First operand 798 states and 1025 transitions. Second operand has 11 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:39,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:39,922 INFO L93 Difference]: Finished difference Result 1242 states and 1584 transitions. [2022-12-13 14:41:39,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 14:41:39,922 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-12-13 14:41:39,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:39,924 INFO L225 Difference]: With dead ends: 1242 [2022-12-13 14:41:39,924 INFO L226 Difference]: Without dead ends: 1242 [2022-12-13 14:41:39,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=225, Invalid=897, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 14:41:39,925 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 692 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:39,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [692 Valid, 942 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 14:41:39,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2022-12-13 14:41:39,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 916. [2022-12-13 14:41:39,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 823 states have (on average 1.330498177399757) internal successors, (1095), 877 states have internal predecessors, (1095), 30 states have call successors, (30), 15 states have call predecessors, (30), 30 states have return successors, (60), 23 states have call predecessors, (60), 30 states have call successors, (60) [2022-12-13 14:41:39,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1185 transitions. [2022-12-13 14:41:39,934 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1185 transitions. Word has length 51 [2022-12-13 14:41:39,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:39,934 INFO L495 AbstractCegarLoop]: Abstraction has 916 states and 1185 transitions. [2022-12-13 14:41:39,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:39,934 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1185 transitions. [2022-12-13 14:41:39,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 14:41:39,935 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:39,935 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:39,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 14:41:40,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:41:40,136 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:40,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:40,137 INFO L85 PathProgramCache]: Analyzing trace with hash 267567629, now seen corresponding path program 1 times [2022-12-13 14:41:40,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:40,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492549790] [2022-12-13 14:41:40,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:40,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:40,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:41,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:41,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:41,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:41,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:41,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492549790] [2022-12-13 14:41:41,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492549790] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:41:41,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135997553] [2022-12-13 14:41:41,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:41,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:41:41,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:41:41,126 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:41:41,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 14:41:41,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:41,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-13 14:41:41,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:41:41,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 14:41:41,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 14:41:41,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 14:41:41,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:41:41,562 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 29 treesize of output 28 [2022-12-13 14:41:41,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:41:41,565 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 27 treesize of output 26 [2022-12-13 14:41:41,670 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 19 treesize of output 7 [2022-12-13 14:41:41,672 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 21 treesize of output 9 [2022-12-13 14:41:41,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:41,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:41:41,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135997553] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:41,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:41:41,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [14] total 23 [2022-12-13 14:41:41,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165901185] [2022-12-13 14:41:41,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:41,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 14:41:41,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:41,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 14:41:41,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-12-13 14:41:41,716 INFO L87 Difference]: Start difference. First operand 916 states and 1185 transitions. Second operand has 11 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:42,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:42,292 INFO L93 Difference]: Finished difference Result 1180 states and 1503 transitions. [2022-12-13 14:41:42,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 14:41:42,292 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-12-13 14:41:42,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:42,294 INFO L225 Difference]: With dead ends: 1180 [2022-12-13 14:41:42,294 INFO L226 Difference]: Without dead ends: 1180 [2022-12-13 14:41:42,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2022-12-13 14:41:42,295 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 592 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:42,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 869 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 14:41:42,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2022-12-13 14:41:42,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 961. [2022-12-13 14:41:42,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 864 states have (on average 1.3368055555555556) internal successors, (1155), 920 states have internal predecessors, (1155), 32 states have call successors, (32), 16 states have call predecessors, (32), 32 states have return successors, (64), 24 states have call predecessors, (64), 32 states have call successors, (64) [2022-12-13 14:41:42,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1251 transitions. [2022-12-13 14:41:42,304 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1251 transitions. Word has length 51 [2022-12-13 14:41:42,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:42,305 INFO L495 AbstractCegarLoop]: Abstraction has 961 states and 1251 transitions. [2022-12-13 14:41:42,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:42,305 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1251 transitions. [2022-12-13 14:41:42,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 14:41:42,305 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:42,305 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:42,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 14:41:42,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-12-13 14:41:42,506 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:42,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:42,506 INFO L85 PathProgramCache]: Analyzing trace with hash 269414670, now seen corresponding path program 1 times [2022-12-13 14:41:42,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:42,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594759041] [2022-12-13 14:41:42,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:42,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:42,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:42,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:42,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:42,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:42,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594759041] [2022-12-13 14:41:42,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594759041] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:42,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:42,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 14:41:42,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084386661] [2022-12-13 14:41:42,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:42,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 14:41:42,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:42,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 14:41:42,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-13 14:41:42,689 INFO L87 Difference]: Start difference. First operand 961 states and 1251 transitions. Second operand has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:43,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:43,137 INFO L93 Difference]: Finished difference Result 1487 states and 1913 transitions. [2022-12-13 14:41:43,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 14:41:43,137 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-12-13 14:41:43,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:43,140 INFO L225 Difference]: With dead ends: 1487 [2022-12-13 14:41:43,140 INFO L226 Difference]: Without dead ends: 1487 [2022-12-13 14:41:43,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2022-12-13 14:41:43,140 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 475 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:43,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 1150 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 14:41:43,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2022-12-13 14:41:43,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 933. [2022-12-13 14:41:43,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 840 states have (on average 1.338095238095238) internal successors, (1124), 894 states have internal predecessors, (1124), 30 states have call successors, (30), 15 states have call predecessors, (30), 30 states have return successors, (60), 23 states have call predecessors, (60), 30 states have call successors, (60) [2022-12-13 14:41:43,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 1214 transitions. [2022-12-13 14:41:43,155 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 1214 transitions. Word has length 51 [2022-12-13 14:41:43,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:43,155 INFO L495 AbstractCegarLoop]: Abstraction has 933 states and 1214 transitions. [2022-12-13 14:41:43,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:43,155 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 1214 transitions. [2022-12-13 14:41:43,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 14:41:43,155 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:43,155 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:43,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-12-13 14:41:43,156 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:43,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:43,156 INFO L85 PathProgramCache]: Analyzing trace with hash 269414671, now seen corresponding path program 1 times [2022-12-13 14:41:43,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:43,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682250923] [2022-12-13 14:41:43,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:43,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:43,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:43,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:43,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:43,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:43,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:43,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682250923] [2022-12-13 14:41:43,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682250923] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:43,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:43,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 14:41:43,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992671028] [2022-12-13 14:41:43,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:43,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 14:41:43,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:43,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 14:41:43,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-13 14:41:43,482 INFO L87 Difference]: Start difference. First operand 933 states and 1214 transitions. Second operand has 9 states, 8 states have (on average 6.125) internal successors, (49), 9 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:43,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:43,917 INFO L93 Difference]: Finished difference Result 1507 states and 1953 transitions. [2022-12-13 14:41:43,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 14:41:43,917 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.125) internal successors, (49), 9 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-12-13 14:41:43,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:43,920 INFO L225 Difference]: With dead ends: 1507 [2022-12-13 14:41:43,920 INFO L226 Difference]: Without dead ends: 1507 [2022-12-13 14:41:43,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-12-13 14:41:43,920 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 425 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 1034 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:43,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 1034 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 14:41:43,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2022-12-13 14:41:43,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1156. [2022-12-13 14:41:43,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1156 states, 1035 states have (on average 1.3458937198067633) internal successors, (1393), 1103 states have internal predecessors, (1393), 44 states have call successors, (44), 22 states have call predecessors, (44), 44 states have return successors, (88), 30 states have call predecessors, (88), 44 states have call successors, (88) [2022-12-13 14:41:43,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1156 states to 1156 states and 1525 transitions. [2022-12-13 14:41:43,932 INFO L78 Accepts]: Start accepts. Automaton has 1156 states and 1525 transitions. Word has length 51 [2022-12-13 14:41:43,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:43,933 INFO L495 AbstractCegarLoop]: Abstraction has 1156 states and 1525 transitions. [2022-12-13 14:41:43,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.125) internal successors, (49), 9 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:43,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1156 states and 1525 transitions. [2022-12-13 14:41:43,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 14:41:43,933 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:43,933 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:43,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-12-13 14:41:43,933 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:43,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:43,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1432637722, now seen corresponding path program 1 times [2022-12-13 14:41:43,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:43,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744305220] [2022-12-13 14:41:43,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:43,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:43,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:44,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:44,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:44,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:44,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:44,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744305220] [2022-12-13 14:41:44,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744305220] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:41:44,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080370966] [2022-12-13 14:41:44,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:44,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:41:44,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:41:44,732 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:41:44,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 14:41:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:44,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-13 14:41:44,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:41:45,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 14:41:45,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 14:41:45,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:41:45,222 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 33 treesize of output 32 [2022-12-13 14:41:45,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:41:45,227 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 27 treesize of output 26 [2022-12-13 14:41:45,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:41:45,432 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 27 treesize of output 13 [2022-12-13 14:41:45,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:41:45,436 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 21 treesize of output 7 [2022-12-13 14:41:45,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:45,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:41:45,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080370966] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:45,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:41:45,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [15] total 26 [2022-12-13 14:41:45,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842804628] [2022-12-13 14:41:45,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:45,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 14:41:45,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:45,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 14:41:45,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2022-12-13 14:41:45,489 INFO L87 Difference]: Start difference. First operand 1156 states and 1525 transitions. Second operand has 13 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:46,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:46,881 INFO L93 Difference]: Finished difference Result 2007 states and 2617 transitions. [2022-12-13 14:41:46,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 14:41:46,882 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-12-13 14:41:46,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:46,884 INFO L225 Difference]: With dead ends: 2007 [2022-12-13 14:41:46,884 INFO L226 Difference]: Without dead ends: 2007 [2022-12-13 14:41:46,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=249, Invalid=1391, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 14:41:46,885 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 981 mSDsluCounter, 1748 mSDsCounter, 0 mSdLazyCounter, 1308 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 981 SdHoareTripleChecker+Valid, 2047 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:46,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [981 Valid, 2047 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1308 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-13 14:41:46,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2007 states. [2022-12-13 14:41:46,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2007 to 1102. [2022-12-13 14:41:46,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 989 states have (on average 1.346814964610718) internal successors, (1332), 1053 states have internal predecessors, (1332), 40 states have call successors, (40), 20 states have call predecessors, (40), 40 states have return successors, (80), 28 states have call predecessors, (80), 40 states have call successors, (80) [2022-12-13 14:41:46,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1452 transitions. [2022-12-13 14:41:46,900 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1452 transitions. Word has length 51 [2022-12-13 14:41:46,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:46,900 INFO L495 AbstractCegarLoop]: Abstraction has 1102 states and 1452 transitions. [2022-12-13 14:41:46,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:46,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1452 transitions. [2022-12-13 14:41:46,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 14:41:46,900 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:46,900 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:46,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 14:41:47,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-12-13 14:41:47,102 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:47,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:47,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1302902172, now seen corresponding path program 1 times [2022-12-13 14:41:47,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:47,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915097184] [2022-12-13 14:41:47,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:47,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:47,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:47,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:47,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:47,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:47,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915097184] [2022-12-13 14:41:47,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915097184] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:47,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:47,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-12-13 14:41:47,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149441643] [2022-12-13 14:41:47,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:47,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 14:41:47,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:47,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 14:41:47,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-12-13 14:41:47,939 INFO L87 Difference]: Start difference. First operand 1102 states and 1452 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:50,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:50,132 INFO L93 Difference]: Finished difference Result 2442 states and 3236 transitions. [2022-12-13 14:41:50,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 14:41:50,133 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-12-13 14:41:50,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:50,135 INFO L225 Difference]: With dead ends: 2442 [2022-12-13 14:41:50,136 INFO L226 Difference]: Without dead ends: 2439 [2022-12-13 14:41:50,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=342, Invalid=1140, Unknown=0, NotChecked=0, Total=1482 [2022-12-13 14:41:50,136 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 1311 mSDsluCounter, 2232 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1313 SdHoareTripleChecker+Valid, 2436 SdHoareTripleChecker+Invalid, 1492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:50,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1313 Valid, 2436 Invalid, 1492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1443 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 14:41:50,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2439 states. [2022-12-13 14:41:50,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2439 to 1290. [2022-12-13 14:41:50,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 1157 states have (on average 1.3491789109766639) internal successors, (1561), 1231 states have internal predecessors, (1561), 50 states have call successors, (50), 25 states have call predecessors, (50), 50 states have return successors, (100), 33 states have call predecessors, (100), 50 states have call successors, (100) [2022-12-13 14:41:50,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 1711 transitions. [2022-12-13 14:41:50,155 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 1711 transitions. Word has length 51 [2022-12-13 14:41:50,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:50,155 INFO L495 AbstractCegarLoop]: Abstraction has 1290 states and 1711 transitions. [2022-12-13 14:41:50,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:50,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 1711 transitions. [2022-12-13 14:41:50,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 14:41:50,156 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:50,156 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:50,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-12-13 14:41:50,156 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:50,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:50,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1245643870, now seen corresponding path program 1 times [2022-12-13 14:41:50,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:50,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948155493] [2022-12-13 14:41:50,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:50,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:50,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:50,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:50,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:50,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:50,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:50,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948155493] [2022-12-13 14:41:50,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948155493] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:50,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:50,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-13 14:41:50,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276350960] [2022-12-13 14:41:50,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:50,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 14:41:50,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:50,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 14:41:50,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-12-13 14:41:50,433 INFO L87 Difference]: Start difference. First operand 1290 states and 1711 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:50,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:50,853 INFO L93 Difference]: Finished difference Result 2146 states and 2810 transitions. [2022-12-13 14:41:50,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 14:41:50,853 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-12-13 14:41:50,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:50,855 INFO L225 Difference]: With dead ends: 2146 [2022-12-13 14:41:50,855 INFO L226 Difference]: Without dead ends: 2146 [2022-12-13 14:41:50,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-12-13 14:41:50,856 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 558 mSDsluCounter, 1929 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 2227 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:50,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 2227 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 14:41:50,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2146 states. [2022-12-13 14:41:50,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2146 to 1439. [2022-12-13 14:41:50,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1290 states have (on average 1.3534883720930233) internal successors, (1746), 1372 states have internal predecessors, (1746), 58 states have call successors, (58), 29 states have call predecessors, (58), 58 states have return successors, (116), 37 states have call predecessors, (116), 58 states have call successors, (116) [2022-12-13 14:41:50,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 1920 transitions. [2022-12-13 14:41:50,875 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 1920 transitions. Word has length 51 [2022-12-13 14:41:50,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:50,875 INFO L495 AbstractCegarLoop]: Abstraction has 1439 states and 1920 transitions. [2022-12-13 14:41:50,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:50,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 1920 transitions. [2022-12-13 14:41:50,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-13 14:41:50,875 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:50,876 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:50,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-12-13 14:41:50,876 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:50,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:50,876 INFO L85 PathProgramCache]: Analyzing trace with hash -295339386, now seen corresponding path program 1 times [2022-12-13 14:41:50,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:50,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662799438] [2022-12-13 14:41:50,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:50,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:50,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:51,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:51,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:51,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:51,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:51,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662799438] [2022-12-13 14:41:51,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662799438] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:51,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:51,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-13 14:41:51,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340860679] [2022-12-13 14:41:51,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:51,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 14:41:51,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:51,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 14:41:51,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-12-13 14:41:51,187 INFO L87 Difference]: Start difference. First operand 1439 states and 1920 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:51,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:51,475 INFO L93 Difference]: Finished difference Result 1668 states and 2185 transitions. [2022-12-13 14:41:51,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 14:41:51,475 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-12-13 14:41:51,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:51,477 INFO L225 Difference]: With dead ends: 1668 [2022-12-13 14:41:51,477 INFO L226 Difference]: Without dead ends: 1668 [2022-12-13 14:41:51,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2022-12-13 14:41:51,478 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 582 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 1218 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:51,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [582 Valid, 1218 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 14:41:51,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1668 states. [2022-12-13 14:41:51,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1668 to 1439. [2022-12-13 14:41:51,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1290 states have (on average 1.3534883720930233) internal successors, (1746), 1372 states have internal predecessors, (1746), 58 states have call successors, (58), 29 states have call predecessors, (58), 58 states have return successors, (116), 37 states have call predecessors, (116), 58 states have call successors, (116) [2022-12-13 14:41:51,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 1920 transitions. [2022-12-13 14:41:51,492 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 1920 transitions. Word has length 52 [2022-12-13 14:41:51,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:51,492 INFO L495 AbstractCegarLoop]: Abstraction has 1439 states and 1920 transitions. [2022-12-13 14:41:51,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:51,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 1920 transitions. [2022-12-13 14:41:51,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-13 14:41:51,493 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:51,493 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:51,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-12-13 14:41:51,494 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:51,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:51,494 INFO L85 PathProgramCache]: Analyzing trace with hash -238081084, now seen corresponding path program 1 times [2022-12-13 14:41:51,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:51,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603825568] [2022-12-13 14:41:51,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:51,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:51,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:51,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:51,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:51,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:51,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:51,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603825568] [2022-12-13 14:41:51,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603825568] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:51,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:51,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 14:41:51,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878044929] [2022-12-13 14:41:51,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:51,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 14:41:51,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:51,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 14:41:51,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 14:41:51,722 INFO L87 Difference]: Start difference. First operand 1439 states and 1920 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:51,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:51,928 INFO L93 Difference]: Finished difference Result 1705 states and 2226 transitions. [2022-12-13 14:41:51,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 14:41:51,928 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-12-13 14:41:51,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:51,930 INFO L225 Difference]: With dead ends: 1705 [2022-12-13 14:41:51,930 INFO L226 Difference]: Without dead ends: 1705 [2022-12-13 14:41:51,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-12-13 14:41:51,931 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 551 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 1126 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:51,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [551 Valid, 1126 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:41:51,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2022-12-13 14:41:51,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1334. [2022-12-13 14:41:51,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1197 states have (on average 1.3500417710944026) internal successors, (1616), 1273 states have internal predecessors, (1616), 52 states have call successors, (52), 26 states have call predecessors, (52), 52 states have return successors, (104), 34 states have call predecessors, (104), 52 states have call successors, (104) [2022-12-13 14:41:51,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 1772 transitions. [2022-12-13 14:41:51,944 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 1772 transitions. Word has length 52 [2022-12-13 14:41:51,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:51,945 INFO L495 AbstractCegarLoop]: Abstraction has 1334 states and 1772 transitions. [2022-12-13 14:41:51,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:51,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 1772 transitions. [2022-12-13 14:41:51,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-13 14:41:51,945 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:51,946 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:51,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-12-13 14:41:51,946 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:51,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:51,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1622196871, now seen corresponding path program 1 times [2022-12-13 14:41:51,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:51,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894298818] [2022-12-13 14:41:51,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:51,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:51,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:52,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:52,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:52,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:52,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:52,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894298818] [2022-12-13 14:41:52,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894298818] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:52,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:52,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 14:41:52,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730797153] [2022-12-13 14:41:52,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:52,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 14:41:52,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:52,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 14:41:52,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 14:41:52,130 INFO L87 Difference]: Start difference. First operand 1334 states and 1772 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:52,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:52,320 INFO L93 Difference]: Finished difference Result 1558 states and 2020 transitions. [2022-12-13 14:41:52,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 14:41:52,320 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-12-13 14:41:52,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:52,322 INFO L225 Difference]: With dead ends: 1558 [2022-12-13 14:41:52,322 INFO L226 Difference]: Without dead ends: 1558 [2022-12-13 14:41:52,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-12-13 14:41:52,322 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 353 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 1256 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:52,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 1256 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 14:41:52,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2022-12-13 14:41:52,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 1230. [2022-12-13 14:41:52,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1105 states have (on average 1.3402714932126696) internal successors, (1481), 1175 states have internal predecessors, (1481), 46 states have call successors, (46), 23 states have call predecessors, (46), 46 states have return successors, (92), 31 states have call predecessors, (92), 46 states have call successors, (92) [2022-12-13 14:41:52,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 1619 transitions. [2022-12-13 14:41:52,334 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 1619 transitions. Word has length 52 [2022-12-13 14:41:52,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:52,334 INFO L495 AbstractCegarLoop]: Abstraction has 1230 states and 1619 transitions. [2022-12-13 14:41:52,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:52,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 1619 transitions. [2022-12-13 14:41:52,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-13 14:41:52,335 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:52,335 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:52,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-12-13 14:41:52,335 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:52,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:52,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1233573638, now seen corresponding path program 1 times [2022-12-13 14:41:52,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:52,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291811052] [2022-12-13 14:41:52,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:52,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:52,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:52,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:52,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:52,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:52,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291811052] [2022-12-13 14:41:52,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291811052] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:52,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:52,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-13 14:41:52,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463904547] [2022-12-13 14:41:52,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:52,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 14:41:52,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:52,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 14:41:52,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-12-13 14:41:52,645 INFO L87 Difference]: Start difference. First operand 1230 states and 1619 transitions. Second operand has 13 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:53,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:53,253 INFO L93 Difference]: Finished difference Result 1812 states and 2323 transitions. [2022-12-13 14:41:53,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 14:41:53,254 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-12-13 14:41:53,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:53,256 INFO L225 Difference]: With dead ends: 1812 [2022-12-13 14:41:53,256 INFO L226 Difference]: Without dead ends: 1812 [2022-12-13 14:41:53,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2022-12-13 14:41:53,256 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 636 mSDsluCounter, 1575 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 1753 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:53,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [638 Valid, 1753 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 14:41:53,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2022-12-13 14:41:53,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1346. [2022-12-13 14:41:53,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1346 states, 1209 states have (on average 1.3440860215053763) internal successors, (1625), 1285 states have internal predecessors, (1625), 52 states have call successors, (52), 26 states have call predecessors, (52), 52 states have return successors, (104), 34 states have call predecessors, (104), 52 states have call successors, (104) [2022-12-13 14:41:53,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1346 states to 1346 states and 1781 transitions. [2022-12-13 14:41:53,272 INFO L78 Accepts]: Start accepts. Automaton has 1346 states and 1781 transitions. Word has length 53 [2022-12-13 14:41:53,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:53,273 INFO L495 AbstractCegarLoop]: Abstraction has 1346 states and 1781 transitions. [2022-12-13 14:41:53,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:53,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1346 states and 1781 transitions. [2022-12-13 14:41:53,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-13 14:41:53,273 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:53,273 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:53,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-12-13 14:41:53,273 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:53,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:53,274 INFO L85 PathProgramCache]: Analyzing trace with hash -351851286, now seen corresponding path program 1 times [2022-12-13 14:41:53,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:53,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577158049] [2022-12-13 14:41:53,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:53,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:53,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:53,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:53,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:53,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:53,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:53,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577158049] [2022-12-13 14:41:53,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577158049] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:53,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:53,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-13 14:41:53,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849389033] [2022-12-13 14:41:53,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:53,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 14:41:53,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:53,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 14:41:53,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-12-13 14:41:53,732 INFO L87 Difference]: Start difference. First operand 1346 states and 1781 transitions. Second operand has 15 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:55,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:55,060 INFO L93 Difference]: Finished difference Result 2163 states and 2826 transitions. [2022-12-13 14:41:55,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 14:41:55,060 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-12-13 14:41:55,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:55,063 INFO L225 Difference]: With dead ends: 2163 [2022-12-13 14:41:55,063 INFO L226 Difference]: Without dead ends: 2163 [2022-12-13 14:41:55,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=370, Invalid=1270, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 14:41:55,064 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 1250 mSDsluCounter, 1630 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1252 SdHoareTripleChecker+Valid, 1864 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:55,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1252 Valid, 1864 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 14:41:55,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2022-12-13 14:41:55,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1346. [2022-12-13 14:41:55,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1346 states, 1209 states have (on average 1.3440860215053763) internal successors, (1625), 1285 states have internal predecessors, (1625), 52 states have call successors, (52), 26 states have call predecessors, (52), 52 states have return successors, (104), 34 states have call predecessors, (104), 52 states have call successors, (104) [2022-12-13 14:41:55,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1346 states to 1346 states and 1781 transitions. [2022-12-13 14:41:55,079 INFO L78 Accepts]: Start accepts. Automaton has 1346 states and 1781 transitions. Word has length 54 [2022-12-13 14:41:55,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:55,079 INFO L495 AbstractCegarLoop]: Abstraction has 1346 states and 1781 transitions. [2022-12-13 14:41:55,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:55,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1346 states and 1781 transitions. [2022-12-13 14:41:55,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-13 14:41:55,079 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:55,079 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:55,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-12-13 14:41:55,080 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr62ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:55,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:55,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1161197912, now seen corresponding path program 1 times [2022-12-13 14:41:55,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:55,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405474778] [2022-12-13 14:41:55,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:55,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:55,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:55,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:55,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:55,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:55,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:55,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405474778] [2022-12-13 14:41:55,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405474778] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:55,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:55,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 14:41:55,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709413189] [2022-12-13 14:41:55,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:55,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 14:41:55,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:55,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 14:41:55,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-13 14:41:55,273 INFO L87 Difference]: Start difference. First operand 1346 states and 1781 transitions. Second operand has 9 states, 8 states have (on average 6.5) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:55,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:55,582 INFO L93 Difference]: Finished difference Result 1557 states and 2022 transitions. [2022-12-13 14:41:55,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 14:41:55,582 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-12-13 14:41:55,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:55,584 INFO L225 Difference]: With dead ends: 1557 [2022-12-13 14:41:55,584 INFO L226 Difference]: Without dead ends: 1557 [2022-12-13 14:41:55,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-12-13 14:41:55,584 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 423 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:55,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 958 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 14:41:55,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1557 states. [2022-12-13 14:41:55,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1557 to 1237. [2022-12-13 14:41:55,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1112 states have (on average 1.341726618705036) internal successors, (1492), 1182 states have internal predecessors, (1492), 46 states have call successors, (46), 23 states have call predecessors, (46), 46 states have return successors, (92), 31 states have call predecessors, (92), 46 states have call successors, (92) [2022-12-13 14:41:55,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 1630 transitions. [2022-12-13 14:41:55,596 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 1630 transitions. Word has length 54 [2022-12-13 14:41:55,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:55,596 INFO L495 AbstractCegarLoop]: Abstraction has 1237 states and 1630 transitions. [2022-12-13 14:41:55,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 14:41:55,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 1630 transitions. [2022-12-13 14:41:55,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-13 14:41:55,596 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:55,596 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:55,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-12-13 14:41:55,597 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:55,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:55,597 INFO L85 PathProgramCache]: Analyzing trace with hash 112689098, now seen corresponding path program 1 times [2022-12-13 14:41:55,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:55,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511268566] [2022-12-13 14:41:55,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:55,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:56,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:56,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:56,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-12-13 14:41:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:56,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 14:41:56,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:56,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511268566] [2022-12-13 14:41:56,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511268566] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:56,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:41:56,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-12-13 14:41:56,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802384357] [2022-12-13 14:41:56,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:56,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 14:41:56,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:56,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 14:41:56,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-12-13 14:41:56,053 INFO L87 Difference]: Start difference. First operand 1237 states and 1630 transitions. Second operand has 13 states, 12 states have (on average 4.083333333333333) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 14:41:58,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:41:58,732 INFO L93 Difference]: Finished difference Result 4702 states and 6285 transitions. [2022-12-13 14:41:58,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 14:41:58,732 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.083333333333333) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-12-13 14:41:58,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:41:58,741 INFO L225 Difference]: With dead ends: 4702 [2022-12-13 14:41:58,741 INFO L226 Difference]: Without dead ends: 4702 [2022-12-13 14:41:58,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=313, Invalid=809, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 14:41:58,741 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 1080 mSDsluCounter, 4553 mSDsCounter, 0 mSdLazyCounter, 2473 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1086 SdHoareTripleChecker+Valid, 5200 SdHoareTripleChecker+Invalid, 2545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-13 14:41:58,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1086 Valid, 5200 Invalid, 2545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2473 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-13 14:41:58,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4702 states. [2022-12-13 14:41:58,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4702 to 1951. [2022-12-13 14:41:58,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1770 states have (on average 1.3468926553672316) internal successors, (2384), 1864 states have internal predecessors, (2384), 74 states have call successors, (74), 37 states have call predecessors, (74), 74 states have return successors, (148), 49 states have call predecessors, (148), 74 states have call successors, (148) [2022-12-13 14:41:58,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 2606 transitions. [2022-12-13 14:41:58,775 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 2606 transitions. Word has length 55 [2022-12-13 14:41:58,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:41:58,775 INFO L495 AbstractCegarLoop]: Abstraction has 1951 states and 2606 transitions. [2022-12-13 14:41:58,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.083333333333333) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 14:41:58,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 2606 transitions. [2022-12-13 14:41:58,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-12-13 14:41:58,776 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:41:58,776 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:41:58,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-12-13 14:41:58,776 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:41:58,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:41:58,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1681378697, now seen corresponding path program 1 times [2022-12-13 14:41:58,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:41:58,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975020890] [2022-12-13 14:41:58,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:58,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:41:58,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:59,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:41:59,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:59,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-12-13 14:41:59,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:59,278 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 14:41:59,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:41:59,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975020890] [2022-12-13 14:41:59,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975020890] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:41:59,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18948908] [2022-12-13 14:41:59,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:41:59,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:41:59,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:41:59,279 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:41:59,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 14:41:59,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:41:59,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-13 14:41:59,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:41:59,440 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 14:41:59,440 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 11 treesize of output 11 [2022-12-13 14:41:59,534 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 14:41:59,537 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 14:41:59,612 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-12-13 14:41:59,612 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 1 case distinctions, treesize of input 27 treesize of output 26 [2022-12-13 14:41:59,625 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-12-13 14:41:59,625 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 1 case distinctions, treesize of input 27 treesize of output 26 [2022-12-13 14:41:59,696 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 18 treesize of output 20 [2022-12-13 14:41:59,703 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 18 treesize of output 20 [2022-12-13 14:41:59,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 19 treesize of output 7 [2022-12-13 14:41:59,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 19 treesize of output 7 [2022-12-13 14:41:59,818 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:41:59,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 14:41:59,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18948908] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:41:59,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 14:41:59,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 23 [2022-12-13 14:41:59,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298511324] [2022-12-13 14:41:59,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:41:59,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 14:41:59,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:41:59,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 14:41:59,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2022-12-13 14:41:59,820 INFO L87 Difference]: Start difference. First operand 1951 states and 2606 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 14:42:00,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:42:00,531 INFO L93 Difference]: Finished difference Result 3030 states and 4094 transitions. [2022-12-13 14:42:00,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 14:42:00,531 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-12-13 14:42:00,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:42:00,535 INFO L225 Difference]: With dead ends: 3030 [2022-12-13 14:42:00,535 INFO L226 Difference]: Without dead ends: 3030 [2022-12-13 14:42:00,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2022-12-13 14:42:00,535 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 593 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 2043 SdHoareTripleChecker+Invalid, 1148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 14:42:00,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 2043 Invalid, 1148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1135 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 14:42:00,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2022-12-13 14:42:00,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 1700. [2022-12-13 14:42:00,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1539 states have (on average 1.3534762833008447) internal successors, (2083), 1625 states have internal predecessors, (2083), 64 states have call successors, (64), 32 states have call predecessors, (64), 64 states have return successors, (128), 42 states have call predecessors, (128), 64 states have call successors, (128) [2022-12-13 14:42:00,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 2275 transitions. [2022-12-13 14:42:00,559 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 2275 transitions. Word has length 55 [2022-12-13 14:42:00,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:42:00,559 INFO L495 AbstractCegarLoop]: Abstraction has 1700 states and 2275 transitions. [2022-12-13 14:42:00,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 14:42:00,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 2275 transitions. [2022-12-13 14:42:00,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-13 14:42:00,559 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:42:00,559 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:42:00,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 14:42:00,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-12-13 14:42:00,760 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:42:00,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:42:00,760 INFO L85 PathProgramCache]: Analyzing trace with hash 839700204, now seen corresponding path program 1 times [2022-12-13 14:42:00,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:42:00,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870645282] [2022-12-13 14:42:00,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:42:00,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:42:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:42:01,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:42:01,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:42:01,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-12-13 14:42:01,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:42:01,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 14:42:01,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:42:01,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870645282] [2022-12-13 14:42:01,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870645282] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:42:01,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:42:01,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-12-13 14:42:01,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321448111] [2022-12-13 14:42:01,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:42:01,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 14:42:01,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:42:01,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 14:42:01,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-12-13 14:42:01,302 INFO L87 Difference]: Start difference. First operand 1700 states and 2275 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 14:42:02,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:42:02,343 INFO L93 Difference]: Finished difference Result 4178 states and 5625 transitions. [2022-12-13 14:42:02,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 14:42:02,343 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 56 [2022-12-13 14:42:02,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:42:02,348 INFO L225 Difference]: With dead ends: 4178 [2022-12-13 14:42:02,348 INFO L226 Difference]: Without dead ends: 4176 [2022-12-13 14:42:02,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=278, Invalid=778, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 14:42:02,348 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 1570 mSDsluCounter, 1994 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1570 SdHoareTripleChecker+Valid, 2228 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 14:42:02,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1570 Valid, 2228 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1028 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 14:42:02,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2022-12-13 14:42:02,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 1870. [2022-12-13 14:42:02,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1685 states have (on average 1.3513353115727003) internal successors, (2277), 1783 states have internal predecessors, (2277), 76 states have call successors, (76), 38 states have call predecessors, (76), 76 states have return successors, (152), 48 states have call predecessors, (152), 76 states have call successors, (152) [2022-12-13 14:42:02,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2505 transitions. [2022-12-13 14:42:02,373 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2505 transitions. Word has length 56 [2022-12-13 14:42:02,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:42:02,373 INFO L495 AbstractCegarLoop]: Abstraction has 1870 states and 2505 transitions. [2022-12-13 14:42:02,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 14:42:02,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2505 transitions. [2022-12-13 14:42:02,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-13 14:42:02,373 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:42:02,373 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:42:02,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-12-13 14:42:02,374 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:42:02,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:42:02,374 INFO L85 PathProgramCache]: Analyzing trace with hash -954367591, now seen corresponding path program 1 times [2022-12-13 14:42:02,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:42:02,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749925849] [2022-12-13 14:42:02,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:42:02,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:42:02,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:42:02,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:42:02,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:42:02,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-12-13 14:42:02,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:42:02,902 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 14:42:02,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:42:02,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749925849] [2022-12-13 14:42:02,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749925849] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:42:02,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292597602] [2022-12-13 14:42:02,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:42:02,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:42:02,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:42:02,904 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:42:02,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 14:42:03,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:42:03,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 64 conjunts are in the unsatisfiable core [2022-12-13 14:42:03,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:42:03,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 14:42:03,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 14:42:03,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:42:03,236 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 29 treesize of output 28 [2022-12-13 14:42:03,328 INFO L321 Elim1Store]: treesize reduction 36, result has 37.9 percent of original size [2022-12-13 14:42:03,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 33 [2022-12-13 14:42:03,369 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 21 treesize of output 9 [2022-12-13 14:42:03,371 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:42:03,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:42:03,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292597602] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:42:03,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:42:03,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 24 [2022-12-13 14:42:03,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636981557] [2022-12-13 14:42:03,444 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:42:03,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 14:42:03,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:42:03,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 14:42:03,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-12-13 14:42:03,445 INFO L87 Difference]: Start difference. First operand 1870 states and 2505 transitions. Second operand has 25 states, 24 states have (on average 4.166666666666667) internal successors, (100), 22 states have internal predecessors, (100), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 14:42:04,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:42:04,506 INFO L93 Difference]: Finished difference Result 3227 states and 4322 transitions. [2022-12-13 14:42:04,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 14:42:04,507 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.166666666666667) internal successors, (100), 22 states have internal predecessors, (100), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 56 [2022-12-13 14:42:04,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:42:04,510 INFO L225 Difference]: With dead ends: 3227 [2022-12-13 14:42:04,510 INFO L226 Difference]: Without dead ends: 3227 [2022-12-13 14:42:04,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=1952, Unknown=0, NotChecked=0, Total=2450 [2022-12-13 14:42:04,511 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 1934 mSDsluCounter, 1584 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1935 SdHoareTripleChecker+Valid, 1734 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 14:42:04,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1935 Valid, 1734 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1102 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-13 14:42:04,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3227 states. [2022-12-13 14:42:04,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3227 to 1910. [2022-12-13 14:42:04,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1725 states have (on average 1.3489855072463768) internal successors, (2327), 1819 states have internal predecessors, (2327), 76 states have call successors, (76), 38 states have call predecessors, (76), 76 states have return successors, (152), 52 states have call predecessors, (152), 76 states have call successors, (152) [2022-12-13 14:42:04,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 2555 transitions. [2022-12-13 14:42:04,535 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 2555 transitions. Word has length 56 [2022-12-13 14:42:04,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:42:04,535 INFO L495 AbstractCegarLoop]: Abstraction has 1910 states and 2555 transitions. [2022-12-13 14:42:04,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.166666666666667) internal successors, (100), 22 states have internal predecessors, (100), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 14:42:04,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 2555 transitions. [2022-12-13 14:42:04,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-13 14:42:04,535 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:42:04,535 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:42:04,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 14:42:04,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-12-13 14:42:04,736 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:42:04,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:42:04,736 INFO L85 PathProgramCache]: Analyzing trace with hash -954367590, now seen corresponding path program 1 times [2022-12-13 14:42:04,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:42:04,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214277709] [2022-12-13 14:42:04,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:42:04,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:42:04,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:42:05,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:42:05,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:42:05,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-12-13 14:42:05,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:42:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 14:42:05,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:42:05,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214277709] [2022-12-13 14:42:05,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214277709] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:42:05,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126076568] [2022-12-13 14:42:05,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:42:05,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:42:05,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:42:05,977 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:42:05,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 14:42:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:42:06,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 77 conjunts are in the unsatisfiable core [2022-12-13 14:42:06,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:42:06,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 14:42:06,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 14:42:06,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 14:42:06,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:42:06,529 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 55 treesize of output 46 [2022-12-13 14:42:06,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:42:06,533 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 57 treesize of output 48 [2022-12-13 14:42:06,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:42:06,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 27 [2022-12-13 14:42:06,728 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-12-13 14:42:06,728 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 15 treesize of output 15 [2022-12-13 14:42:06,830 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 32 treesize of output 20 [2022-12-13 14:42:06,832 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 39 treesize of output 21 [2022-12-13 14:42:06,855 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:42:06,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:42:17,180 WARN L233 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 34 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 14:42:17,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126076568] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:42:17,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:42:17,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 32 [2022-12-13 14:42:17,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844175456] [2022-12-13 14:42:17,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:42:17,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 14:42:17,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:42:17,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 14:42:17,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1267, Unknown=0, NotChecked=0, Total=1406 [2022-12-13 14:42:17,182 INFO L87 Difference]: Start difference. First operand 1910 states and 2555 transitions. Second operand has 33 states, 32 states have (on average 3.21875) internal successors, (103), 30 states have internal predecessors, (103), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 14:42:20,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:42:20,920 INFO L93 Difference]: Finished difference Result 4300 states and 5801 transitions. [2022-12-13 14:42:20,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-13 14:42:20,920 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.21875) internal successors, (103), 30 states have internal predecessors, (103), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 56 [2022-12-13 14:42:20,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:42:20,923 INFO L225 Difference]: With dead ends: 4300 [2022-12-13 14:42:20,923 INFO L226 Difference]: Without dead ends: 4300 [2022-12-13 14:42:20,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=844, Invalid=4268, Unknown=0, NotChecked=0, Total=5112 [2022-12-13 14:42:20,924 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 4904 mSDsluCounter, 2915 mSDsCounter, 0 mSdLazyCounter, 2754 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4905 SdHoareTripleChecker+Valid, 3054 SdHoareTripleChecker+Invalid, 3104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 2754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-13 14:42:20,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4905 Valid, 3054 Invalid, 3104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 2754 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-13 14:42:20,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4300 states. [2022-12-13 14:42:20,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4300 to 1910. [2022-12-13 14:42:20,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1725 states have (on average 1.3466666666666667) internal successors, (2323), 1819 states have internal predecessors, (2323), 76 states have call successors, (76), 38 states have call predecessors, (76), 76 states have return successors, (152), 52 states have call predecessors, (152), 76 states have call successors, (152) [2022-12-13 14:42:20,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 2551 transitions. [2022-12-13 14:42:20,952 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 2551 transitions. Word has length 56 [2022-12-13 14:42:20,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:42:20,952 INFO L495 AbstractCegarLoop]: Abstraction has 1910 states and 2551 transitions. [2022-12-13 14:42:20,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.21875) internal successors, (103), 30 states have internal predecessors, (103), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 14:42:20,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 2551 transitions. [2022-12-13 14:42:20,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-13 14:42:20,952 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:42:20,952 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:42:20,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 14:42:21,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:42:21,154 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:42:21,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:42:21,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1104158581, now seen corresponding path program 1 times [2022-12-13 14:42:21,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:42:21,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271465422] [2022-12-13 14:42:21,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:42:21,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:42:21,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:42:22,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:42:22,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:42:22,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-12-13 14:42:22,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:42:22,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 14:42:22,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:42:22,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271465422] [2022-12-13 14:42:22,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271465422] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:42:22,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343597554] [2022-12-13 14:42:22,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:42:22,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:42:22,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:42:22,368 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:42:22,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 14:42:22,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:42:22,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 68 conjunts are in the unsatisfiable core [2022-12-13 14:42:22,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:42:22,747 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 14:42:22,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:42:22,886 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 30 treesize of output 23 [2022-12-13 14:42:23,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:42:23,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:42:23,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:42:23,082 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:42:23,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 52 [2022-12-13 14:42:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:42:23,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:42:23,657 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 84 treesize of output 78 [2022-12-13 14:42:23,671 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 104 treesize of output 98 [2022-12-13 14:42:24,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 14:42:24,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343597554] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:42:24,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:42:24,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 16] total 49 [2022-12-13 14:42:24,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213751600] [2022-12-13 14:42:24,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:42:24,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-13 14:42:24,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:42:24,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-13 14:42:24,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2186, Unknown=0, NotChecked=0, Total=2352 [2022-12-13 14:42:24,155 INFO L87 Difference]: Start difference. First operand 1910 states and 2551 transitions. Second operand has 49 states, 49 states have (on average 3.020408163265306) internal successors, (148), 47 states have internal predecessors, (148), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 14:42:45,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:42:45,609 INFO L93 Difference]: Finished difference Result 9298 states and 12076 transitions. [2022-12-13 14:42:45,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2022-12-13 14:42:45,610 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.020408163265306) internal successors, (148), 47 states have internal predecessors, (148), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 56 [2022-12-13 14:42:45,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:42:45,616 INFO L225 Difference]: With dead ends: 9298 [2022-12-13 14:42:45,616 INFO L226 Difference]: Without dead ends: 9295 [2022-12-13 14:42:45,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13862 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=4506, Invalid=36906, Unknown=0, NotChecked=0, Total=41412 [2022-12-13 14:42:45,620 INFO L413 NwaCegarLoop]: 922 mSDtfsCounter, 4488 mSDsluCounter, 26235 mSDsCounter, 0 mSdLazyCounter, 17652 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4488 SdHoareTripleChecker+Valid, 27157 SdHoareTripleChecker+Invalid, 18078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 17652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-12-13 14:42:45,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4488 Valid, 27157 Invalid, 18078 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [426 Valid, 17652 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2022-12-13 14:42:45,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9295 states. [2022-12-13 14:42:45,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9295 to 1726. [2022-12-13 14:42:45,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1565 states have (on average 1.344408945686901) internal successors, (2104), 1647 states have internal predecessors, (2104), 64 states have call successors, (64), 32 states have call predecessors, (64), 64 states have return successors, (128), 46 states have call predecessors, (128), 64 states have call successors, (128) [2022-12-13 14:42:45,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 2296 transitions. [2022-12-13 14:42:45,662 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 2296 transitions. Word has length 56 [2022-12-13 14:42:45,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:42:45,662 INFO L495 AbstractCegarLoop]: Abstraction has 1726 states and 2296 transitions. [2022-12-13 14:42:45,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.020408163265306) internal successors, (148), 47 states have internal predecessors, (148), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-13 14:42:45,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 2296 transitions. [2022-12-13 14:42:45,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-13 14:42:45,663 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:42:45,663 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:42:45,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 14:42:45,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:42:45,864 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:42:45,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:42:45,865 INFO L85 PathProgramCache]: Analyzing trace with hash -236583639, now seen corresponding path program 1 times [2022-12-13 14:42:45,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:42:45,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706722308] [2022-12-13 14:42:45,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:42:45,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:42:45,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:42:46,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:42:46,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:42:46,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-12-13 14:42:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:42:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 14:42:46,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:42:46,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706722308] [2022-12-13 14:42:46,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706722308] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:42:46,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089670082] [2022-12-13 14:42:46,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:42:46,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:42:46,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:42:46,326 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:42:46,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 14:42:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:42:46,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-13 14:42:46,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:42:46,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 14:42:46,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 14:42:46,930 INFO L321 Elim1Store]: treesize reduction 42, result has 38.2 percent of original size [2022-12-13 14:42:46,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 37 [2022-12-13 14:42:47,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:42:47,034 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 21 treesize of output 9 [2022-12-13 14:42:47,038 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:42:47,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:42:47,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089670082] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:42:47,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:42:47,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2022-12-13 14:42:47,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27647540] [2022-12-13 14:42:47,103 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:42:47,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 14:42:47,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:42:47,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 14:42:47,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-12-13 14:42:47,103 INFO L87 Difference]: Start difference. First operand 1726 states and 2296 transitions. Second operand has 22 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 20 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 14:42:48,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:42:48,323 INFO L93 Difference]: Finished difference Result 2520 states and 3321 transitions. [2022-12-13 14:42:48,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 14:42:48,323 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 20 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2022-12-13 14:42:48,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:42:48,325 INFO L225 Difference]: With dead ends: 2520 [2022-12-13 14:42:48,325 INFO L226 Difference]: Without dead ends: 2520 [2022-12-13 14:42:48,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=364, Invalid=1358, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 14:42:48,326 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 1545 mSDsluCounter, 1590 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1545 SdHoareTripleChecker+Valid, 1764 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 14:42:48,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1545 Valid, 1764 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 14:42:48,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2520 states. [2022-12-13 14:42:48,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2520 to 1870. [2022-12-13 14:42:48,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1693 states have (on average 1.3372711163614885) internal successors, (2264), 1779 states have internal predecessors, (2264), 72 states have call successors, (72), 36 states have call predecessors, (72), 72 states have return successors, (144), 54 states have call predecessors, (144), 72 states have call successors, (144) [2022-12-13 14:42:48,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2480 transitions. [2022-12-13 14:42:48,349 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2480 transitions. Word has length 57 [2022-12-13 14:42:48,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:42:48,349 INFO L495 AbstractCegarLoop]: Abstraction has 1870 states and 2480 transitions. [2022-12-13 14:42:48,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 20 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 14:42:48,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2480 transitions. [2022-12-13 14:42:48,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-13 14:42:48,350 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:42:48,350 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:42:48,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-13 14:42:48,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:42:48,552 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:42:48,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:42:48,553 INFO L85 PathProgramCache]: Analyzing trace with hash -236583638, now seen corresponding path program 1 times [2022-12-13 14:42:48,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:42:48,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386207147] [2022-12-13 14:42:48,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:42:48,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:42:48,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:42:49,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:42:49,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:42:49,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-12-13 14:42:49,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:42:49,617 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 14:42:49,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:42:49,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386207147] [2022-12-13 14:42:49,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386207147] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:42:49,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229405795] [2022-12-13 14:42:49,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:42:49,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:42:49,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:42:49,619 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:42:49,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 14:42:49,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:42:49,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 78 conjunts are in the unsatisfiable core [2022-12-13 14:42:49,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:42:49,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 14:42:50,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 14:42:50,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 14:42:50,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:42:50,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-12-13 14:42:50,486 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2022-12-13 14:42:50,487 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 19 treesize of output 19 [2022-12-13 14:42:50,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:42:50,669 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 25 treesize of output 13 [2022-12-13 14:42:50,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:42:50,673 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 19 treesize of output 7 [2022-12-13 14:42:50,705 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:42:50,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:42:55,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229405795] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:42:55,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:42:55,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 31 [2022-12-13 14:42:55,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860959049] [2022-12-13 14:42:55,040 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:42:55,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 14:42:55,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:42:55,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 14:42:55,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1217, Unknown=0, NotChecked=0, Total=1332 [2022-12-13 14:42:55,041 INFO L87 Difference]: Start difference. First operand 1870 states and 2480 transitions. Second operand has 32 states, 31 states have (on average 3.3870967741935485) internal successors, (105), 29 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 14:43:05,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:43:05,015 INFO L93 Difference]: Finished difference Result 6559 states and 8773 transitions. [2022-12-13 14:43:05,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-12-13 14:43:05,016 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.3870967741935485) internal successors, (105), 29 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2022-12-13 14:43:05,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:43:05,020 INFO L225 Difference]: With dead ends: 6559 [2022-12-13 14:43:05,020 INFO L226 Difference]: Without dead ends: 6559 [2022-12-13 14:43:05,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4605 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=2340, Invalid=13160, Unknown=0, NotChecked=0, Total=15500 [2022-12-13 14:43:05,022 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 4565 mSDsluCounter, 4705 mSDsCounter, 0 mSdLazyCounter, 5177 mSolverCounterSat, 481 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4570 SdHoareTripleChecker+Valid, 4877 SdHoareTripleChecker+Invalid, 5658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 481 IncrementalHoareTripleChecker+Valid, 5177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-12-13 14:43:05,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4570 Valid, 4877 Invalid, 5658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [481 Valid, 5177 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-12-13 14:43:05,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6559 states. [2022-12-13 14:43:05,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6559 to 3245. [2022-12-13 14:43:05,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3245 states, 2988 states have (on average 1.3340026773761713) internal successors, (3986), 3091 states have internal predecessors, (3986), 128 states have call successors, (128), 48 states have call predecessors, (128), 96 states have return successors, (256), 105 states have call predecessors, (256), 128 states have call successors, (256) [2022-12-13 14:43:05,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3245 states to 3245 states and 4370 transitions. [2022-12-13 14:43:05,068 INFO L78 Accepts]: Start accepts. Automaton has 3245 states and 4370 transitions. Word has length 57 [2022-12-13 14:43:05,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:43:05,068 INFO L495 AbstractCegarLoop]: Abstraction has 3245 states and 4370 transitions. [2022-12-13 14:43:05,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.3870967741935485) internal successors, (105), 29 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 14:43:05,068 INFO L276 IsEmpty]: Start isEmpty. Operand 3245 states and 4370 transitions. [2022-12-13 14:43:05,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-13 14:43:05,069 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:43:05,069 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:43:05,073 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 14:43:05,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:43:05,270 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:43:05,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:43:05,271 INFO L85 PathProgramCache]: Analyzing trace with hash -628308544, now seen corresponding path program 1 times [2022-12-13 14:43:05,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:43:05,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884562922] [2022-12-13 14:43:05,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:43:05,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:43:05,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:43:05,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:43:05,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:43:05,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-12-13 14:43:05,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:43:05,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 14:43:05,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:43:05,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884562922] [2022-12-13 14:43:05,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884562922] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:43:05,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870544382] [2022-12-13 14:43:05,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:43:05,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:43:05,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:43:05,794 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:43:05,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 14:43:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:43:05,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 81 conjunts are in the unsatisfiable core [2022-12-13 14:43:05,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:43:05,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 14:43:06,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 14:43:06,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:43:06,300 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 29 treesize of output 28 [2022-12-13 14:43:06,436 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-12-13 14:43:06,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-13 14:43:06,488 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 21 treesize of output 9 [2022-12-13 14:43:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:43:06,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:43:06,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870544382] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:43:06,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:43:06,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 23 [2022-12-13 14:43:06,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665931403] [2022-12-13 14:43:06,568 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:43:06,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 14:43:06,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:43:06,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 14:43:06,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-12-13 14:43:06,569 INFO L87 Difference]: Start difference. First operand 3245 states and 4370 transitions. Second operand has 24 states, 23 states have (on average 4.521739130434782) internal successors, (104), 20 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 14:43:07,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:43:07,713 INFO L93 Difference]: Finished difference Result 4288 states and 5731 transitions. [2022-12-13 14:43:07,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 14:43:07,713 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.521739130434782) internal successors, (104), 20 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2022-12-13 14:43:07,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:43:07,717 INFO L225 Difference]: With dead ends: 4288 [2022-12-13 14:43:07,717 INFO L226 Difference]: Without dead ends: 4288 [2022-12-13 14:43:07,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=293, Invalid=1113, Unknown=0, NotChecked=0, Total=1406 [2022-12-13 14:43:07,717 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 1160 mSDsluCounter, 2063 mSDsCounter, 0 mSdLazyCounter, 1321 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1160 SdHoareTripleChecker+Valid, 2339 SdHoareTripleChecker+Invalid, 1353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 14:43:07,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1160 Valid, 2339 Invalid, 1353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1321 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 14:43:07,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4288 states. [2022-12-13 14:43:07,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4288 to 3289. [2022-12-13 14:43:07,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3289 states, 3032 states have (on average 1.3324538258575198) internal successors, (4040), 3131 states have internal predecessors, (4040), 128 states have call successors, (128), 48 states have call predecessors, (128), 96 states have return successors, (256), 109 states have call predecessors, (256), 128 states have call successors, (256) [2022-12-13 14:43:07,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3289 states to 3289 states and 4424 transitions. [2022-12-13 14:43:07,748 INFO L78 Accepts]: Start accepts. Automaton has 3289 states and 4424 transitions. Word has length 57 [2022-12-13 14:43:07,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:43:07,748 INFO L495 AbstractCegarLoop]: Abstraction has 3289 states and 4424 transitions. [2022-12-13 14:43:07,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.521739130434782) internal successors, (104), 20 states have internal predecessors, (104), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 14:43:07,749 INFO L276 IsEmpty]: Start isEmpty. Operand 3289 states and 4424 transitions. [2022-12-13 14:43:07,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-13 14:43:07,749 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:43:07,749 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:43:07,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 14:43:07,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2022-12-13 14:43:07,951 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:43:07,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:43:07,952 INFO L85 PathProgramCache]: Analyzing trace with hash -628308543, now seen corresponding path program 1 times [2022-12-13 14:43:07,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:43:07,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929911754] [2022-12-13 14:43:07,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:43:07,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:43:07,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:43:08,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:43:08,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:43:08,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-12-13 14:43:08,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:43:08,725 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 14:43:08,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:43:08,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929911754] [2022-12-13 14:43:08,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929911754] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:43:08,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596334312] [2022-12-13 14:43:08,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:43:08,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:43:08,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:43:08,726 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:43:08,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 14:43:08,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:43:08,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 94 conjunts are in the unsatisfiable core [2022-12-13 14:43:08,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:43:08,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 14:43:09,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 14:43:09,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 14:43:09,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:43:09,454 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 46 treesize of output 37 [2022-12-13 14:43:09,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:43:09,462 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 27 treesize of output 26 [2022-12-13 14:43:09,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:43:09,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-12-13 14:43:09,689 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-12-13 14:43:09,689 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 15 treesize of output 15 [2022-12-13 14:43:09,806 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 19 treesize of output 7 [2022-12-13 14:43:09,809 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 25 treesize of output 13 [2022-12-13 14:43:09,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:43:09,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:43:12,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596334312] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:43:12,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:43:12,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 29 [2022-12-13 14:43:12,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27622875] [2022-12-13 14:43:12,334 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:43:12,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 14:43:12,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:43:12,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 14:43:12,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 14:43:12,335 INFO L87 Difference]: Start difference. First operand 3289 states and 4424 transitions. Second operand has 30 states, 29 states have (on average 3.6206896551724137) internal successors, (105), 26 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 14:43:14,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:43:14,541 INFO L93 Difference]: Finished difference Result 4629 states and 6165 transitions. [2022-12-13 14:43:14,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 14:43:14,541 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.6206896551724137) internal successors, (105), 26 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2022-12-13 14:43:14,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:43:14,544 INFO L225 Difference]: With dead ends: 4629 [2022-12-13 14:43:14,544 INFO L226 Difference]: Without dead ends: 4629 [2022-12-13 14:43:14,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=523, Invalid=2339, Unknown=0, NotChecked=0, Total=2862 [2022-12-13 14:43:14,545 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 2402 mSDsluCounter, 2505 mSDsCounter, 0 mSdLazyCounter, 2044 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2402 SdHoareTripleChecker+Valid, 2774 SdHoareTripleChecker+Invalid, 2128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-13 14:43:14,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2402 Valid, 2774 Invalid, 2128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2044 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-13 14:43:14,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4629 states. [2022-12-13 14:43:14,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4629 to 3361. [2022-12-13 14:43:14,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3361 states, 3100 states have (on average 1.3335483870967741) internal successors, (4134), 3199 states have internal predecessors, (4134), 132 states have call successors, (132), 48 states have call predecessors, (132), 96 states have return successors, (264), 113 states have call predecessors, (264), 132 states have call successors, (264) [2022-12-13 14:43:14,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3361 states to 3361 states and 4530 transitions. [2022-12-13 14:43:14,583 INFO L78 Accepts]: Start accepts. Automaton has 3361 states and 4530 transitions. Word has length 57 [2022-12-13 14:43:14,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:43:14,583 INFO L495 AbstractCegarLoop]: Abstraction has 3361 states and 4530 transitions. [2022-12-13 14:43:14,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.6206896551724137) internal successors, (105), 26 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 14:43:14,583 INFO L276 IsEmpty]: Start isEmpty. Operand 3361 states and 4530 transitions. [2022-12-13 14:43:14,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-13 14:43:14,584 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:43:14,584 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:43:14,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 14:43:14,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-12-13 14:43:14,786 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:43:14,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:43:14,787 INFO L85 PathProgramCache]: Analyzing trace with hash 2013817809, now seen corresponding path program 1 times [2022-12-13 14:43:14,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:43:14,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979916411] [2022-12-13 14:43:14,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:43:14,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:43:14,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:43:16,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:43:16,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:43:16,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:43:16,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:43:16,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979916411] [2022-12-13 14:43:16,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979916411] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:43:16,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550184610] [2022-12-13 14:43:16,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:43:16,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:43:16,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:43:16,664 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:43:16,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 14:43:16,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:43:16,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 83 conjunts are in the unsatisfiable core [2022-12-13 14:43:16,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:43:16,817 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 14:43:16,817 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 11 treesize of output 11 [2022-12-13 14:43:17,016 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 14:43:17,021 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 14:43:17,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:43:17,129 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 22 [2022-12-13 14:43:17,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:43:17,134 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 22 [2022-12-13 14:43:17,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:43:17,229 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 16 treesize of output 18 [2022-12-13 14:43:17,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:43:17,237 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 16 treesize of output 18 [2022-12-13 14:43:17,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:43:17,428 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 25 treesize of output 24 [2022-12-13 14:43:17,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:43:17,436 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 24 treesize of output 26 [2022-12-13 14:43:17,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:43:17,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:43:17,535 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-12-13 14:43:17,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 51 [2022-12-13 14:43:17,542 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 24 treesize of output 26 [2022-12-13 14:43:17,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:43:17,893 INFO L321 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2022-12-13 14:43:17,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 42 [2022-12-13 14:43:17,897 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:43:17,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 21 treesize of output 15 [2022-12-13 14:43:17,930 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:43:17,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:43:18,180 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|)) (.cse3 (+ (* ~unnamed1~0~LIST_END 4) |c_ULTIMATE.start_append_one_~list#1.offset|)) (.cse1 (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_BEG 4)))) (and (forall ((v_ArrVal_1470 Int)) (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store .cse2 .cse3 v_ArrVal_1470)))) (select .cse0 (select (select .cse0 |c_~#list~0.base|) .cse1))) 4) 0)) (forall ((v_ArrVal_1470 Int) (v_ArrVal_1472 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1472) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store .cse2 .cse3 v_ArrVal_1470)) |c_~#list~0.base|) .cse1)) 4) 0)))) is different from false [2022-12-13 14:43:19,174 INFO L321 Elim1Store]: treesize reduction 20, result has 63.0 percent of original size [2022-12-13 14:43:19,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 103 treesize of output 99 [2022-12-13 14:43:19,196 INFO L321 Elim1Store]: treesize reduction 20, result has 63.0 percent of original size [2022-12-13 14:43:19,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 80 [2022-12-13 14:43:19,217 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:43:19,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 307 treesize of output 321 [2022-12-13 14:43:19,329 INFO L321 Elim1Store]: treesize reduction 103, result has 67.5 percent of original size [2022-12-13 14:43:19,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1951 treesize of output 1952 [2022-12-13 14:43:19,348 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 1726 treesize of output 1702 [2022-12-13 14:43:19,365 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 1702 treesize of output 1654 [2022-12-13 14:43:19,386 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 3577 treesize of output 3205 [2022-12-13 14:43:19,622 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 10 treesize of output 4 [2022-12-13 14:53:55,087 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:53:55,089 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 19757 treesize of output 18489 [2022-12-13 14:53:55,535 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 17738 treesize of output 15590 [2022-12-13 14:53:56,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:53:56,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:53:56,192 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 14:53:56,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:53:56,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:53:56,202 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 14:53:56,211 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 14:53:56,224 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 14:53:56,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:53:56,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:53:56,239 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 14:53:56,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:53:56,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:53:56,245 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 14:53:56,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:53:56,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:53:56,249 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 14:53:56,256 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 14:53:56,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:53:56,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:53:56,260 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 14:53:56,263 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 14:53:56,271 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 14:53:56,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:53:56,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:53:56,275 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 14:53:56,278 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 14:53:56,281 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 14:53:56,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:53:56,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:53:56,286 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 14:53:56,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:53:56,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:53:56,289 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 14:53:56,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:53:56,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:53:56,293 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 14:53:56,298 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 14:53:56,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:53:56,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:53:56,304 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 14:53:56,308 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 14:53:56,312 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 14:53:56,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:53:56,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:53:56,320 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 14:53:56,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:53:56,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:53:56,324 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 14:53:56,331 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 14:53:56,337 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 14:53:56,346 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 14:53:56,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:53:56,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:53:56,351 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 14:53:56,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:53:56,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:53:56,356 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 14:53:56,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:53:56,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:53:56,361 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 14:53:56,376 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 14:53:56,380 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 14:53:56,386 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 14:53:56,398 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 14:53:56,400 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-13 14:53:56,467 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:53:56,467 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 49 treesize of output 53 [2022-12-13 14:53:56,917 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:53:56,919 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 19136 treesize of output 16350 [2022-12-13 14:53:59,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:53:59,594 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-13 14:53:59,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 141 treesize of output 1 [2022-12-13 14:54:00,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:54:00,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550184610] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:54:00,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:54:00,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19, 20] total 50 [2022-12-13 14:54:00,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444744046] [2022-12-13 14:54:00,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:54:00,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-12-13 14:54:00,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:54:00,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-12-13 14:54:00,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=2171, Unknown=12, NotChecked=94, Total=2450 [2022-12-13 14:54:00,153 INFO L87 Difference]: Start difference. First operand 3361 states and 4530 transitions. Second operand has 50 states, 50 states have (on average 2.92) internal successors, (146), 49 states have internal predecessors, (146), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 14:54:11,731 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (* ~unnamed1~0~LIST_BEG 4)) (.cse0 (+ |c_~#list~0.offset| (* 4 |c_ULTIMATE.start_main_#t~ret30#1|)))) (and (= (select |c_#valid| 3) 1) (<= .cse0 .cse1) (let ((.cse4 (+ |c_ULTIMATE.start_append_one_~list#1.offset| .cse1))) (or (let ((.cse7 (+ |c_~#list~0.offset| .cse1)) (.cse5 (+ (* ~unnamed1~0~LIST_END 4) |c_ULTIMATE.start_append_one_~list#1.offset|)) (.cse6 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base|)) (.cse2 (+ |c_ULTIMATE.start_create_item_~item~0#1.offset| (* |c_ULTIMATE.start_create_item_~term_field~0#1| 4)))) (and (forall ((v_ArrVal_1470 Int) (v_ArrVal_1461 Int) (v_ArrVal_1463 Int) (v_ArrVal_1465 (Array Int Int)) (v_ArrVal_1464 (Array Int Int)) (v_ArrVal_1472 (Array Int Int))) (= (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse2 v_ArrVal_1463)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1464) |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1472) (select (select (let ((.cse3 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store .cse6 .cse2 v_ArrVal_1461)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1465))) (store .cse3 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse3 |c_ULTIMATE.start_append_one_~list#1.base|) .cse4 |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse5 v_ArrVal_1470))) |c_~#list~0.base|) .cse7)) 4) 0)) (forall ((v_ArrVal_1470 Int) (v_ArrVal_1461 Int) (v_ArrVal_1465 (Array Int Int))) (= (select (let ((.cse8 (let ((.cse9 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store .cse6 .cse2 v_ArrVal_1461)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1465))) (store .cse9 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse9 |c_ULTIMATE.start_append_one_~list#1.base|) .cse4 |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse5 v_ArrVal_1470))))) (select .cse8 (select (select .cse8 |c_~#list~0.base|) .cse7))) 4) 0)))) (not (= |c_ULTIMATE.start_create_item_~link~0#1.offset| 0)) (not (= |c_ULTIMATE.start_create_item_~link~0#1.base| 0)) (not (<= 0 .cse4)))) (= 3 |c_~#list~0.base|) (<= |c_~#list~0.offset| 0) (<= .cse1 .cse0) (<= 0 |c_~#list~0.offset|))) is different from false [2022-12-13 14:54:12,400 WARN L837 $PredicateComparison]: unable to prove that (and (= (select |c_#valid| 3) 1) (let ((.cse8 (* ~unnamed1~0~LIST_BEG 4))) (let ((.cse2 (+ |c_ULTIMATE.start_append_one_~list#1.offset| .cse8))) (or (let ((.cse5 (+ |c_~#list~0.offset| .cse8)) (.cse3 (+ (* ~unnamed1~0~LIST_END 4) |c_ULTIMATE.start_append_one_~list#1.offset|)) (.cse4 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base|)) (.cse0 (+ |c_ULTIMATE.start_create_item_~item~0#1.offset| (* |c_ULTIMATE.start_create_item_~term_field~0#1| 4)))) (and (forall ((v_ArrVal_1470 Int) (v_ArrVal_1461 Int) (v_ArrVal_1463 Int) (v_ArrVal_1465 (Array Int Int)) (v_ArrVal_1464 (Array Int Int)) (v_ArrVal_1472 (Array Int Int))) (= (select (select (store (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse0 v_ArrVal_1463)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1464) |c_ULTIMATE.start_append_one_~list#1.base| v_ArrVal_1472) (select (select (let ((.cse1 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store .cse4 .cse0 v_ArrVal_1461)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1465))) (store .cse1 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse1 |c_ULTIMATE.start_append_one_~list#1.base|) .cse2 |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse3 v_ArrVal_1470))) |c_~#list~0.base|) .cse5)) 4) 0)) (forall ((v_ArrVal_1470 Int) (v_ArrVal_1461 Int) (v_ArrVal_1465 (Array Int Int))) (= (select (let ((.cse6 (let ((.cse7 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_item_~item~0#1.base| (store .cse4 .cse0 v_ArrVal_1461)) |c_ULTIMATE.start_create_item_~cursor#1.base| v_ArrVal_1465))) (store .cse7 |c_ULTIMATE.start_append_one_~list#1.base| (store (store (select .cse7 |c_ULTIMATE.start_append_one_~list#1.base|) .cse2 |c_ULTIMATE.start_create_item_~item~0#1.base|) .cse3 v_ArrVal_1470))))) (select .cse6 (select (select .cse6 |c_~#list~0.base|) .cse5))) 4) 0)))) (not (= |c_ULTIMATE.start_create_item_~link~0#1.offset| 0)) (not (= |c_ULTIMATE.start_create_item_~link~0#1.base| 0)) (not (<= 0 .cse2))))) (= 3 |c_~#list~0.base|) (<= |c_~#list~0.offset| 0) (<= 0 |c_~#list~0.offset|)) is different from false [2022-12-13 14:54:46,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:54:46,139 INFO L93 Difference]: Finished difference Result 8716 states and 11628 transitions. [2022-12-13 14:54:46,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-12-13 14:54:46,140 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.92) internal successors, (146), 49 states have internal predecessors, (146), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2022-12-13 14:54:46,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:54:46,147 INFO L225 Difference]: With dead ends: 8716 [2022-12-13 14:54:46,147 INFO L226 Difference]: Without dead ends: 8716 [2022-12-13 14:54:46,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 87 SyntacticMatches, 5 SemanticMatches, 158 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 7573 ImplicationChecksByTransitivity, 39.4s TimeCoverageRelationStatistics Valid=3660, Invalid=20823, Unknown=21, NotChecked=936, Total=25440 [2022-12-13 14:54:46,150 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 8736 mSDsluCounter, 5893 mSDsCounter, 0 mSdLazyCounter, 4828 mSolverCounterSat, 720 mSolverCounterUnsat, 98 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8741 SdHoareTripleChecker+Valid, 6072 SdHoareTripleChecker+Invalid, 6430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 720 IncrementalHoareTripleChecker+Valid, 4828 IncrementalHoareTripleChecker+Invalid, 98 IncrementalHoareTripleChecker+Unknown, 784 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-12-13 14:54:46,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8741 Valid, 6072 Invalid, 6430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [720 Valid, 4828 Invalid, 98 Unknown, 784 Unchecked, 8.4s Time] [2022-12-13 14:54:46,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8716 states. [2022-12-13 14:54:46,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8716 to 5487. [2022-12-13 14:54:46,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5487 states, 5042 states have (on average 1.3292344307814359) internal successors, (6702), 5215 states have internal predecessors, (6702), 238 states have call successors, (238), 87 states have call predecessors, (238), 174 states have return successors, (476), 184 states have call predecessors, (476), 238 states have call successors, (476) [2022-12-13 14:54:46,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5487 states to 5487 states and 7416 transitions. [2022-12-13 14:54:46,224 INFO L78 Accepts]: Start accepts. Automaton has 5487 states and 7416 transitions. Word has length 57 [2022-12-13 14:54:46,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:54:46,224 INFO L495 AbstractCegarLoop]: Abstraction has 5487 states and 7416 transitions. [2022-12-13 14:54:46,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.92) internal successors, (146), 49 states have internal predecessors, (146), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 14:54:46,224 INFO L276 IsEmpty]: Start isEmpty. Operand 5487 states and 7416 transitions. [2022-12-13 14:54:46,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-13 14:54:46,224 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:54:46,224 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:54:46,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 14:54:46,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:54:46,426 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:54:46,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:54:46,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1580084909, now seen corresponding path program 1 times [2022-12-13 14:54:46,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:54:46,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959558805] [2022-12-13 14:54:46,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:54:46,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:54:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:54:47,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-12-13 14:54:47,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:54:47,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:54:47,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:54:47,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959558805] [2022-12-13 14:54:47,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959558805] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:54:47,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143018475] [2022-12-13 14:54:47,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:54:47,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:54:47,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:54:47,784 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:54:47,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 14:54:47,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:54:47,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 72 conjunts are in the unsatisfiable core [2022-12-13 14:54:47,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:54:47,965 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 14:54:47,965 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 11 treesize of output 11 [2022-12-13 14:54:48,271 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 14:54:48,279 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 14:54:48,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:54:48,360 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 16 treesize of output 18 [2022-12-13 14:54:48,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:54:48,368 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 16 treesize of output 18 [2022-12-13 14:54:48,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:54:48,579 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 16 treesize of output 18 [2022-12-13 14:54:48,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:54:48,587 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 16 treesize of output 18 [2022-12-13 14:54:48,680 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 25 treesize of output 24 [2022-12-13 14:54:48,685 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 24 treesize of output 26 [2022-12-13 14:54:49,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:54:49,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:54:49,132 INFO L321 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2022-12-13 14:54:49,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 85 treesize of output 45 [2022-12-13 14:54:49,140 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:54:49,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 21 treesize of output 15 [2022-12-13 14:54:49,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:54:49,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:54:49,501 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:54:49,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 30 [2022-12-13 14:54:49,509 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:54:49,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2022-12-13 14:54:49,958 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:54:49,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 50 [2022-12-13 14:54:49,964 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:54:49,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2022-12-13 14:54:49,973 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:54:49,974 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 112 treesize of output 115 [2022-12-13 14:54:50,005 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:54:50,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 396 treesize of output 449 [2022-12-13 14:54:50,021 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 206 treesize of output 170 [2022-12-13 14:54:50,037 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:54:50,037 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 381 treesize of output 329 [2022-12-13 14:54:50,050 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 280 treesize of output 270 [2022-12-13 14:54:50,062 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 270 treesize of output 250 [2022-12-13 14:54:51,580 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:54:51,580 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 1 case distinctions, treesize of input 49 treesize of output 38 [2022-12-13 14:54:51,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 14:54:51,641 INFO L321 Elim1Store]: treesize reduction 60, result has 56.2 percent of original size [2022-12-13 14:54:51,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 481 treesize of output 483 [2022-12-13 14:54:51,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 14:54:51,667 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:54:51,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 449 treesize of output 403 [2022-12-13 14:54:51,687 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 14:54:51,688 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 371 treesize of output 347 [2022-12-13 14:54:52,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143018475] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:54:52,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 14:54:52,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 35 [2022-12-13 14:54:52,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231868284] [2022-12-13 14:54:52,733 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 14:54:52,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-13 14:54:52,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:54:52,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-13 14:54:52,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2009, Unknown=22, NotChecked=0, Total=2162 [2022-12-13 14:54:52,734 INFO L87 Difference]: Start difference. First operand 5487 states and 7416 transitions. Second operand has 35 states, 35 states have (on average 2.9714285714285715) internal successors, (104), 34 states have internal predecessors, (104), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 14:55:18,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:55:18,210 INFO L93 Difference]: Finished difference Result 13923 states and 18726 transitions. [2022-12-13 14:55:18,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 217 states. [2022-12-13 14:55:18,211 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.9714285714285715) internal successors, (104), 34 states have internal predecessors, (104), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 57 [2022-12-13 14:55:18,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 14:55:18,223 INFO L225 Difference]: With dead ends: 13923 [2022-12-13 14:55:18,223 INFO L226 Difference]: Without dead ends: 13923 [2022-12-13 14:55:18,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25389 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=6578, Invalid=60739, Unknown=23, NotChecked=0, Total=67340 [2022-12-13 14:55:18,228 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 10994 mSDsluCounter, 5607 mSDsCounter, 0 mSdLazyCounter, 4526 mSolverCounterSat, 976 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10996 SdHoareTripleChecker+Valid, 5753 SdHoareTripleChecker+Invalid, 5502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 976 IncrementalHoareTripleChecker+Valid, 4526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-12-13 14:55:18,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10996 Valid, 5753 Invalid, 5502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [976 Valid, 4526 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-12-13 14:55:18,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13923 states. [2022-12-13 14:55:18,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13923 to 5783. [2022-12-13 14:55:18,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5783 states, 5302 states have (on average 1.3278008298755186) internal successors, (7040), 5493 states have internal predecessors, (7040), 254 states have call successors, (254), 97 states have call predecessors, (254), 194 states have return successors, (508), 192 states have call predecessors, (508), 254 states have call successors, (508) [2022-12-13 14:55:18,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5783 states to 5783 states and 7802 transitions. [2022-12-13 14:55:18,336 INFO L78 Accepts]: Start accepts. Automaton has 5783 states and 7802 transitions. Word has length 57 [2022-12-13 14:55:18,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 14:55:18,336 INFO L495 AbstractCegarLoop]: Abstraction has 5783 states and 7802 transitions. [2022-12-13 14:55:18,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.9714285714285715) internal successors, (104), 34 states have internal predecessors, (104), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 14:55:18,336 INFO L276 IsEmpty]: Start isEmpty. Operand 5783 states and 7802 transitions. [2022-12-13 14:55:18,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-13 14:55:18,337 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 14:55:18,337 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:55:18,343 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 14:55:18,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b431043d-026a-41d8-a140-7e1131f74f09/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:55:18,538 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-12-13 14:55:18,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:55:18,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1622092904, now seen corresponding path program 1 times [2022-12-13 14:55:18,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:55:18,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128447038] [2022-12-13 14:55:18,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:55:18,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:55:18,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat