./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/test-0504_1.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_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/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_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0504_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/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_2c9f9de2-868a-475d-ab98-81f996fcac28/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 ad4b9fd301578a7ddb25530c70896459a49284f596306d3b6d0c853e43916174 --- 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 15:17:59,008 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 15:17:59,010 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 15:17:59,025 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 15:17:59,025 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 15:17:59,026 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 15:17:59,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 15:17:59,028 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 15:17:59,029 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 15:17:59,029 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 15:17:59,030 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 15:17:59,031 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 15:17:59,031 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 15:17:59,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 15:17:59,032 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 15:17:59,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 15:17:59,034 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 15:17:59,034 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 15:17:59,035 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 15:17:59,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 15:17:59,037 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 15:17:59,038 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 15:17:59,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 15:17:59,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 15:17:59,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 15:17:59,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 15:17:59,041 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 15:17:59,042 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 15:17:59,042 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 15:17:59,043 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 15:17:59,043 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 15:17:59,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 15:17:59,044 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 15:17:59,045 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 15:17:59,045 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 15:17:59,045 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 15:17:59,046 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 15:17:59,046 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 15:17:59,046 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 15:17:59,047 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 15:17:59,047 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 15:17:59,048 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 15:17:59,062 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 15:17:59,062 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 15:17:59,062 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 15:17:59,062 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 15:17:59,063 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 15:17:59,063 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 15:17:59,063 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 15:17:59,064 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 15:17:59,064 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 15:17:59,064 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 15:17:59,064 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 15:17:59,064 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 15:17:59,064 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 15:17:59,064 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 15:17:59,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 15:17:59,064 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 15:17:59,064 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 15:17:59,065 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 15:17:59,065 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 15:17:59,065 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 15:17:59,065 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 15:17:59,065 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 15:17:59,065 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 15:17:59,065 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 15:17:59,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 15:17:59,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:17:59,066 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 15:17:59,066 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 15:17:59,066 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 15:17:59,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 15:17:59,066 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 15:17:59,066 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 15:17:59,066 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 15:17:59,067 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 15:17:59,067 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_2c9f9de2-868a-475d-ab98-81f996fcac28/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad4b9fd301578a7ddb25530c70896459a49284f596306d3b6d0c853e43916174 [2022-12-13 15:17:59,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 15:17:59,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 15:17:59,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 15:17:59,265 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 15:17:59,266 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 15:17:59,267 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/list-ext-properties/test-0504_1.i [2022-12-13 15:18:01,958 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 15:18:02,133 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 15:18:02,134 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/sv-benchmarks/c/list-ext-properties/test-0504_1.i [2022-12-13 15:18:02,143 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/data/28b888ac8/9194516d15994cf78a13898c6aeabe2a/FLAG7cc36842c [2022-12-13 15:18:02,154 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/data/28b888ac8/9194516d15994cf78a13898c6aeabe2a [2022-12-13 15:18:02,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 15:18:02,158 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 15:18:02,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 15:18:02,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 15:18:02,163 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 15:18:02,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:18:02" (1/1) ... [2022-12-13 15:18:02,164 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ddb213b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:18:02, skipping insertion in model container [2022-12-13 15:18:02,164 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:18:02" (1/1) ... [2022-12-13 15:18:02,171 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 15:18:02,198 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 15:18:02,421 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:18:02,430 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 15:18:02,470 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:18:02,490 INFO L208 MainTranslator]: Completed translation [2022-12-13 15:18:02,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:18:02 WrapperNode [2022-12-13 15:18:02,490 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 15:18:02,491 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 15:18:02,491 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 15:18:02,492 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 15:18:02,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:18:02" (1/1) ... [2022-12-13 15:18:02,508 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:18:02" (1/1) ... [2022-12-13 15:18:02,525 INFO L138 Inliner]: procedures = 123, calls = 28, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 112 [2022-12-13 15:18:02,526 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 15:18:02,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 15:18:02,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 15:18:02,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 15:18:02,534 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:18:02" (1/1) ... [2022-12-13 15:18:02,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:18:02" (1/1) ... [2022-12-13 15:18:02,538 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:18:02" (1/1) ... [2022-12-13 15:18:02,538 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:18:02" (1/1) ... [2022-12-13 15:18:02,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:18:02" (1/1) ... [2022-12-13 15:18:02,549 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:18:02" (1/1) ... [2022-12-13 15:18:02,550 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:18:02" (1/1) ... [2022-12-13 15:18:02,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:18:02" (1/1) ... [2022-12-13 15:18:02,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 15:18:02,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 15:18:02,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 15:18:02,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 15:18:02,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:18:02" (1/1) ... [2022-12-13 15:18:02,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:18:02,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:18:02,589 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 15:18:02,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 15:18:02,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 15:18:02,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 15:18:02,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 15:18:02,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 15:18:02,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-13 15:18:02,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-13 15:18:02,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 15:18:02,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 15:18:02,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 15:18:02,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 15:18:02,721 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 15:18:02,723 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 15:18:02,987 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 15:18:02,994 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 15:18:02,994 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-13 15:18:02,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:18:02 BoogieIcfgContainer [2022-12-13 15:18:02,997 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 15:18:03,000 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 15:18:03,000 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 15:18:03,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 15:18:03,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 03:18:02" (1/3) ... [2022-12-13 15:18:03,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c57d4e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:18:03, skipping insertion in model container [2022-12-13 15:18:03,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:18:02" (2/3) ... [2022-12-13 15:18:03,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c57d4e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:18:03, skipping insertion in model container [2022-12-13 15:18:03,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:18:02" (3/3) ... [2022-12-13 15:18:03,006 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0504_1.i [2022-12-13 15:18:03,025 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 15:18:03,025 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 43 error locations. [2022-12-13 15:18:03,058 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:18:03,062 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;@31bf33a6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:18:03,063 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2022-12-13 15:18:03,066 INFO L276 IsEmpty]: Start isEmpty. Operand has 94 states, 50 states have (on average 2.14) internal successors, (107), 93 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 15:18:03,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-13 15:18:03,070 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:18:03,070 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 15:18:03,071 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:18:03,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:18:03,075 INFO L85 PathProgramCache]: Analyzing trace with hash 28793288, now seen corresponding path program 1 times [2022-12-13 15:18:03,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:18:03,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131269081] [2022-12-13 15:18:03,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:03,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:18:03,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:03,197 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 15:18:03,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:18:03,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131269081] [2022-12-13 15:18:03,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131269081] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:18:03,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:18:03,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:18:03,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747581187] [2022-12-13 15:18:03,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:18:03,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 15:18:03,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:18:03,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 15:18:03,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 15:18:03,229 INFO L87 Difference]: Start difference. First operand has 94 states, 50 states have (on average 2.14) internal successors, (107), 93 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:18:03,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:18:03,242 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2022-12-13 15:18:03,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 15:18:03,244 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-13 15:18:03,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:18:03,250 INFO L225 Difference]: With dead ends: 94 [2022-12-13 15:18:03,251 INFO L226 Difference]: Without dead ends: 92 [2022-12-13 15:18:03,252 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 15:18:03,255 INFO L413 NwaCegarLoop]: 101 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, 101 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 15:18:03,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:18:03,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-12-13 15:18:03,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-12-13 15:18:03,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 49 states have (on average 2.020408163265306) internal successors, (99), 91 states have internal predecessors, (99), 0 states have call successors, (0), 0 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 15:18:03,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2022-12-13 15:18:03,289 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 5 [2022-12-13 15:18:03,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:18:03,289 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2022-12-13 15:18:03,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:18:03,289 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2022-12-13 15:18:03,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 15:18:03,290 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:18:03,290 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:18:03,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 15:18:03,290 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:18:03,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:18:03,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1806850220, now seen corresponding path program 1 times [2022-12-13 15:18:03,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:18:03,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455954517] [2022-12-13 15:18:03,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:03,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:18:03,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:03,359 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 15:18:03,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:18:03,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455954517] [2022-12-13 15:18:03,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455954517] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:18:03,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:18:03,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:18:03,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171325137] [2022-12-13 15:18:03,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:18:03,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:18:03,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:18:03,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:18:03,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:18:03,362 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand has 3 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 15:18:03,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:18:03,385 INFO L93 Difference]: Finished difference Result 99 states and 107 transitions. [2022-12-13 15:18:03,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:18:03,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 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 15:18:03,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:18:03,387 INFO L225 Difference]: With dead ends: 99 [2022-12-13 15:18:03,387 INFO L226 Difference]: Without dead ends: 99 [2022-12-13 15:18:03,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:18:03,388 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 4 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:18:03,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 188 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:18:03,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-12-13 15:18:03,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2022-12-13 15:18:03,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 95 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 15:18:03,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2022-12-13 15:18:03,396 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 7 [2022-12-13 15:18:03,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:18:03,397 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2022-12-13 15:18:03,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 15:18:03,397 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2022-12-13 15:18:03,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 15:18:03,397 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:18:03,397 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:18:03,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 15:18:03,398 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:18:03,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:18:03,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1806849231, now seen corresponding path program 1 times [2022-12-13 15:18:03,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:18:03,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953205715] [2022-12-13 15:18:03,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:03,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:18:03,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:03,471 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 15:18:03,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:18:03,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953205715] [2022-12-13 15:18:03,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953205715] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:18:03,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:18:03,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:18:03,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034229655] [2022-12-13 15:18:03,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:18:03,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:18:03,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:18:03,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:18:03,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:18:03,473 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand has 3 states, 2 states have (on average 3.5) 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 15:18:03,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:18:03,565 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2022-12-13 15:18:03,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:18:03,566 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) 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 15:18:03,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:18:03,568 INFO L225 Difference]: With dead ends: 121 [2022-12-13 15:18:03,568 INFO L226 Difference]: Without dead ends: 121 [2022-12-13 15:18:03,568 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 15:18:03,569 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 84 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:18:03,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 79 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:18:03,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-12-13 15:18:03,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 88. [2022-12-13 15:18:03,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 53 states have (on average 1.830188679245283) internal successors, (97), 87 states have internal predecessors, (97), 0 states have call successors, (0), 0 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 15:18:03,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2022-12-13 15:18:03,577 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 7 [2022-12-13 15:18:03,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:18:03,577 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2022-12-13 15:18:03,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) 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 15:18:03,577 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2022-12-13 15:18:03,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-13 15:18:03,577 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:18:03,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:18:03,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 15:18:03,578 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:18:03,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:18:03,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1806849232, now seen corresponding path program 1 times [2022-12-13 15:18:03,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:18:03,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528606770] [2022-12-13 15:18:03,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:03,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:18:03,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:03,666 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 15:18:03,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:18:03,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528606770] [2022-12-13 15:18:03,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528606770] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:18:03,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:18:03,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:18:03,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185837224] [2022-12-13 15:18:03,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:18:03,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:18:03,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:18:03,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:18:03,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:18:03,668 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand has 3 states, 2 states have (on average 3.5) 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 15:18:03,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:18:03,736 INFO L93 Difference]: Finished difference Result 129 states and 145 transitions. [2022-12-13 15:18:03,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:18:03,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) 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 15:18:03,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:18:03,737 INFO L225 Difference]: With dead ends: 129 [2022-12-13 15:18:03,737 INFO L226 Difference]: Without dead ends: 129 [2022-12-13 15:18:03,737 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 15:18:03,738 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 57 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:18:03,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 120 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:18:03,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-12-13 15:18:03,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 90. [2022-12-13 15:18:03,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 60 states have (on average 1.7333333333333334) internal successors, (104), 89 states have internal predecessors, (104), 0 states have call successors, (0), 0 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 15:18:03,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 104 transitions. [2022-12-13 15:18:03,742 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 104 transitions. Word has length 7 [2022-12-13 15:18:03,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:18:03,742 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 104 transitions. [2022-12-13 15:18:03,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) 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 15:18:03,743 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 104 transitions. [2022-12-13 15:18:03,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 15:18:03,743 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:18:03,743 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:18:03,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 15:18:03,743 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:18:03,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:18:03,744 INFO L85 PathProgramCache]: Analyzing trace with hash 177781672, now seen corresponding path program 1 times [2022-12-13 15:18:03,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:18:03,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145136310] [2022-12-13 15:18:03,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:03,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:18:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:03,760 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 15:18:03,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:18:03,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145136310] [2022-12-13 15:18:03,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145136310] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:18:03,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:18:03,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:18:03,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512147741] [2022-12-13 15:18:03,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:18:03,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:18:03,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:18:03,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:18:03,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:18:03,762 INFO L87 Difference]: Start difference. First operand 90 states and 104 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:18:03,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:18:03,804 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2022-12-13 15:18:03,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:18:03,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-13 15:18:03,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:18:03,805 INFO L225 Difference]: With dead ends: 92 [2022-12-13 15:18:03,805 INFO L226 Difference]: Without dead ends: 89 [2022-12-13 15:18:03,805 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 15:18:03,806 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 1 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:18:03,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 134 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:18:03,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-12-13 15:18:03,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-12-13 15:18:03,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 59 states have (on average 1.728813559322034) internal successors, (102), 88 states have internal predecessors, (102), 0 states have call successors, (0), 0 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 15:18:03,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 102 transitions. [2022-12-13 15:18:03,812 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 102 transitions. Word has length 8 [2022-12-13 15:18:03,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:18:03,813 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 102 transitions. [2022-12-13 15:18:03,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:18:03,813 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 102 transitions. [2022-12-13 15:18:03,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 15:18:03,814 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:18:03,814 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 15:18:03,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 15:18:03,814 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:18:03,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:18:03,815 INFO L85 PathProgramCache]: Analyzing trace with hash 875833349, now seen corresponding path program 1 times [2022-12-13 15:18:03,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:18:03,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968190597] [2022-12-13 15:18:03,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:03,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:18:03,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:04,066 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 15:18:04,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:18:04,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968190597] [2022-12-13 15:18:04,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968190597] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:18:04,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:18:04,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:18:04,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408866108] [2022-12-13 15:18:04,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:18:04,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 15:18:04,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:18:04,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 15:18:04,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:18:04,069 INFO L87 Difference]: Start difference. First operand 89 states and 102 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 15:18:04,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:18:04,168 INFO L93 Difference]: Finished difference Result 119 states and 134 transitions. [2022-12-13 15:18:04,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:18:04,169 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2022-12-13 15:18:04,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:18:04,170 INFO L225 Difference]: With dead ends: 119 [2022-12-13 15:18:04,170 INFO L226 Difference]: Without dead ends: 119 [2022-12-13 15:18:04,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 15:18:04,171 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 174 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:18:04,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 90 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:18:04,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-12-13 15:18:04,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 79. [2022-12-13 15:18:04,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 52 states have (on average 1.6730769230769231) internal successors, (87), 78 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 15:18:04,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2022-12-13 15:18:04,177 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 17 [2022-12-13 15:18:04,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:18:04,177 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2022-12-13 15:18:04,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 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 15:18:04,177 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2022-12-13 15:18:04,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-13 15:18:04,178 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:18:04,178 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 15:18:04,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 15:18:04,178 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:18:04,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:18:04,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1380999357, now seen corresponding path program 1 times [2022-12-13 15:18:04,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:18:04,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930465713] [2022-12-13 15:18:04,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:04,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:18:04,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:04,232 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 15:18:04,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:18:04,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930465713] [2022-12-13 15:18:04,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930465713] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:18:04,232 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:18:04,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:18:04,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665569289] [2022-12-13 15:18:04,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:18:04,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:18:04,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:18:04,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:18:04,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:18:04,234 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:18:04,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:18:04,242 INFO L93 Difference]: Finished difference Result 112 states and 122 transitions. [2022-12-13 15:18:04,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:18:04,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-13 15:18:04,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:18:04,243 INFO L225 Difference]: With dead ends: 112 [2022-12-13 15:18:04,243 INFO L226 Difference]: Without dead ends: 112 [2022-12-13 15:18:04,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:18:04,244 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 24 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:18:04,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 157 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:18:04,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-12-13 15:18:04,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 102. [2022-12-13 15:18:04,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 75 states have (on average 1.6266666666666667) internal successors, (122), 101 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 15:18:04,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 122 transitions. [2022-12-13 15:18:04,253 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 122 transitions. Word has length 18 [2022-12-13 15:18:04,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:18:04,254 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 122 transitions. [2022-12-13 15:18:04,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:18:04,254 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 122 transitions. [2022-12-13 15:18:04,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-13 15:18:04,255 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:18:04,255 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 15:18:04,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 15:18:04,255 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:18:04,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:18:04,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1381030048, now seen corresponding path program 1 times [2022-12-13 15:18:04,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:18:04,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968330526] [2022-12-13 15:18:04,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:04,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:18:04,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:04,298 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 15:18:04,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:18:04,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968330526] [2022-12-13 15:18:04,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968330526] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:18:04,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:18:04,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:18:04,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443454119] [2022-12-13 15:18:04,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:18:04,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:18:04,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:18:04,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:18:04,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:18:04,301 INFO L87 Difference]: Start difference. First operand 102 states and 122 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:18:04,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:18:04,345 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2022-12-13 15:18:04,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:18:04,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-13 15:18:04,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:18:04,346 INFO L225 Difference]: With dead ends: 98 [2022-12-13 15:18:04,346 INFO L226 Difference]: Without dead ends: 98 [2022-12-13 15:18:04,346 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 15:18:04,347 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 14 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:18:04,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 102 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:18:04,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-12-13 15:18:04,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-12-13 15:18:04,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 75 states have (on average 1.52) internal successors, (114), 97 states have internal predecessors, (114), 0 states have call successors, (0), 0 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 15:18:04,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 114 transitions. [2022-12-13 15:18:04,354 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 114 transitions. Word has length 18 [2022-12-13 15:18:04,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:18:04,354 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 114 transitions. [2022-12-13 15:18:04,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:18:04,354 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 114 transitions. [2022-12-13 15:18:04,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-13 15:18:04,355 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:18:04,355 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 15:18:04,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 15:18:04,355 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:18:04,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:18:04,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1381030049, now seen corresponding path program 1 times [2022-12-13 15:18:04,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:18:04,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743880334] [2022-12-13 15:18:04,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:04,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:18:04,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:04,420 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 15:18:04,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:18:04,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743880334] [2022-12-13 15:18:04,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743880334] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:18:04,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:18:04,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:18:04,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098276008] [2022-12-13 15:18:04,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:18:04,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 15:18:04,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:18:04,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 15:18:04,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 15:18:04,422 INFO L87 Difference]: Start difference. First operand 98 states and 114 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:18:04,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:18:04,461 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2022-12-13 15:18:04,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 15:18:04,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-13 15:18:04,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:18:04,462 INFO L225 Difference]: With dead ends: 94 [2022-12-13 15:18:04,463 INFO L226 Difference]: Without dead ends: 94 [2022-12-13 15:18:04,463 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 15:18:04,464 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 10 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:18:04,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 107 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:18:04,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-12-13 15:18:04,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-12-13 15:18:04,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 75 states have (on average 1.4133333333333333) internal successors, (106), 93 states have internal predecessors, (106), 0 states have call successors, (0), 0 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 15:18:04,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 106 transitions. [2022-12-13 15:18:04,469 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 106 transitions. Word has length 18 [2022-12-13 15:18:04,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:18:04,469 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 106 transitions. [2022-12-13 15:18:04,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:18:04,470 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 106 transitions. [2022-12-13 15:18:04,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 15:18:04,470 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:18:04,470 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 15:18:04,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 15:18:04,471 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:18:04,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:18:04,471 INFO L85 PathProgramCache]: Analyzing trace with hash 774470346, now seen corresponding path program 1 times [2022-12-13 15:18:04,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:18:04,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063082245] [2022-12-13 15:18:04,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:04,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:18:04,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:04,656 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 15:18:04,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:18:04,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063082245] [2022-12-13 15:18:04,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063082245] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:18:04,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:18:04,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 15:18:04,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376602193] [2022-12-13 15:18:04,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:18:04,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:18:04,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:18:04,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:18:04,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:18:04,658 INFO L87 Difference]: Start difference. First operand 94 states and 106 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:18:04,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:18:04,787 INFO L93 Difference]: Finished difference Result 168 states and 190 transitions. [2022-12-13 15:18:04,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:18:04,788 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-13 15:18:04,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:18:04,788 INFO L225 Difference]: With dead ends: 168 [2022-12-13 15:18:04,788 INFO L226 Difference]: Without dead ends: 168 [2022-12-13 15:18:04,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-13 15:18:04,789 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 54 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:18:04,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 235 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:18:04,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-12-13 15:18:04,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 112. [2022-12-13 15:18:04,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 93 states have (on average 1.3978494623655915) internal successors, (130), 111 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 15:18:04,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 130 transitions. [2022-12-13 15:18:04,793 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 130 transitions. Word has length 21 [2022-12-13 15:18:04,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:18:04,793 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 130 transitions. [2022-12-13 15:18:04,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:18:04,794 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 130 transitions. [2022-12-13 15:18:04,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 15:18:04,794 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:18:04,794 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 15:18:04,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 15:18:04,795 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:18:04,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:18:04,795 INFO L85 PathProgramCache]: Analyzing trace with hash 774470347, now seen corresponding path program 1 times [2022-12-13 15:18:04,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:18:04,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573700105] [2022-12-13 15:18:04,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:04,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:18:04,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:05,220 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 15:18:05,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:18:05,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573700105] [2022-12-13 15:18:05,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573700105] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:18:05,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:18:05,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 15:18:05,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137425328] [2022-12-13 15:18:05,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:18:05,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 15:18:05,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:18:05,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 15:18:05,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-12-13 15:18:05,223 INFO L87 Difference]: Start difference. First operand 112 states and 130 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:18:05,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:18:05,577 INFO L93 Difference]: Finished difference Result 198 states and 221 transitions. [2022-12-13 15:18:05,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 15:18:05,577 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-13 15:18:05,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:18:05,578 INFO L225 Difference]: With dead ends: 198 [2022-12-13 15:18:05,578 INFO L226 Difference]: Without dead ends: 198 [2022-12-13 15:18:05,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2022-12-13 15:18:05,579 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 312 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 15:18:05,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 246 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 15:18:05,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-12-13 15:18:05,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 112. [2022-12-13 15:18:05,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 93 states have (on average 1.3763440860215055) internal successors, (128), 111 states have internal predecessors, (128), 0 states have call successors, (0), 0 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 15:18:05,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 128 transitions. [2022-12-13 15:18:05,581 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 128 transitions. Word has length 21 [2022-12-13 15:18:05,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:18:05,582 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 128 transitions. [2022-12-13 15:18:05,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:18:05,582 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 128 transitions. [2022-12-13 15:18:05,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-13 15:18:05,582 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:18:05,582 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] [2022-12-13 15:18:05,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 15:18:05,583 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:18:05,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:18:05,583 INFO L85 PathProgramCache]: Analyzing trace with hash -181494867, now seen corresponding path program 1 times [2022-12-13 15:18:05,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:18:05,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272334764] [2022-12-13 15:18:05,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:05,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:18:05,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:05,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:18:05,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:18:05,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272334764] [2022-12-13 15:18:05,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272334764] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:18:05,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:18:05,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:18:05,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648946451] [2022-12-13 15:18:05,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:18:05,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:18:05,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:18:05,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:18:05,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:18:05,636 INFO L87 Difference]: Start difference. First operand 112 states and 128 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:18:05,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:18:05,725 INFO L93 Difference]: Finished difference Result 146 states and 162 transitions. [2022-12-13 15:18:05,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:18:05,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-13 15:18:05,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:18:05,726 INFO L225 Difference]: With dead ends: 146 [2022-12-13 15:18:05,726 INFO L226 Difference]: Without dead ends: 146 [2022-12-13 15:18:05,726 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 15:18:05,727 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 95 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:18:05,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 112 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:18:05,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-12-13 15:18:05,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 114. [2022-12-13 15:18:05,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 95 states have (on average 1.3894736842105264) internal successors, (132), 113 states have internal predecessors, (132), 0 states have call successors, (0), 0 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 15:18:05,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 132 transitions. [2022-12-13 15:18:05,730 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 132 transitions. Word has length 22 [2022-12-13 15:18:05,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:18:05,730 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 132 transitions. [2022-12-13 15:18:05,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:18:05,731 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 132 transitions. [2022-12-13 15:18:05,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-13 15:18:05,731 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:18:05,731 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] [2022-12-13 15:18:05,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 15:18:05,732 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:18:05,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:18:05,732 INFO L85 PathProgramCache]: Analyzing trace with hash -181494866, now seen corresponding path program 1 times [2022-12-13 15:18:05,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:18:05,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262046754] [2022-12-13 15:18:05,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:05,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:18:05,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:05,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:18:05,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:18:05,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262046754] [2022-12-13 15:18:05,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262046754] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:18:05,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:18:05,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:18:05,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241352304] [2022-12-13 15:18:05,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:18:05,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:18:05,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:18:05,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:18:05,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:18:05,827 INFO L87 Difference]: Start difference. First operand 114 states and 132 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:18:05,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:18:05,922 INFO L93 Difference]: Finished difference Result 187 states and 217 transitions. [2022-12-13 15:18:05,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:18:05,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-13 15:18:05,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:18:05,923 INFO L225 Difference]: With dead ends: 187 [2022-12-13 15:18:05,923 INFO L226 Difference]: Without dead ends: 187 [2022-12-13 15:18:05,924 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 15:18:05,924 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 86 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:18:05,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 151 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:18:05,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-12-13 15:18:05,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 138. [2022-12-13 15:18:05,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 119 states have (on average 1.3865546218487395) internal successors, (165), 137 states have internal predecessors, (165), 0 states have call successors, (0), 0 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 15:18:05,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 165 transitions. [2022-12-13 15:18:05,927 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 165 transitions. Word has length 22 [2022-12-13 15:18:05,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:18:05,927 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 165 transitions. [2022-12-13 15:18:05,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:18:05,927 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 165 transitions. [2022-12-13 15:18:05,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-13 15:18:05,928 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:18:05,928 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] [2022-12-13 15:18:05,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 15:18:05,928 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:18:05,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:18:05,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1331373881, now seen corresponding path program 1 times [2022-12-13 15:18:05,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:18:05,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99917882] [2022-12-13 15:18:05,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:05,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:18:05,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:18:05,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:18:05,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99917882] [2022-12-13 15:18:05,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99917882] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:18:05,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854265510] [2022-12-13 15:18:05,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:05,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:18:05,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:18:05,971 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:18:05,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 15:18:06,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:06,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 15:18:06,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:18:06,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:18:06,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:18:06,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854265510] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:18:06,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 15:18:06,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-12-13 15:18:06,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199722866] [2022-12-13 15:18:06,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:18:06,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:18:06,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:18:06,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:18:06,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:18:06,110 INFO L87 Difference]: Start difference. First operand 138 states and 165 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 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 15:18:06,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:18:06,126 INFO L93 Difference]: Finished difference Result 138 states and 163 transitions. [2022-12-13 15:18:06,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:18:06,127 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-12-13 15:18:06,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:18:06,127 INFO L225 Difference]: With dead ends: 138 [2022-12-13 15:18:06,127 INFO L226 Difference]: Without dead ends: 138 [2022-12-13 15:18:06,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 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 15:18:06,128 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 57 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:18:06,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 108 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:18:06,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-12-13 15:18:06,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-12-13 15:18:06,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 119 states have (on average 1.3697478991596639) internal successors, (163), 137 states have internal predecessors, (163), 0 states have call successors, (0), 0 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 15:18:06,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 163 transitions. [2022-12-13 15:18:06,132 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 163 transitions. Word has length 23 [2022-12-13 15:18:06,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:18:06,132 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 163 transitions. [2022-12-13 15:18:06,132 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), 0 states have call successors, (0), 0 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 15:18:06,133 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 163 transitions. [2022-12-13 15:18:06,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 15:18:06,133 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:18:06,133 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] [2022-12-13 15:18:06,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 15:18:06,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 15:18:06,334 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:18:06,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:18:06,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1677094766, now seen corresponding path program 1 times [2022-12-13 15:18:06,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:18:06,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102631797] [2022-12-13 15:18:06,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:06,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:18:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:06,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:18:06,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:18:06,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102631797] [2022-12-13 15:18:06,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102631797] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:18:06,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:18:06,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:18:06,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766708799] [2022-12-13 15:18:06,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:18:06,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 15:18:06,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:18:06,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 15:18:06,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:18:06,400 INFO L87 Difference]: Start difference. First operand 138 states and 163 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 15:18:06,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:18:06,534 INFO L93 Difference]: Finished difference Result 185 states and 211 transitions. [2022-12-13 15:18:06,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:18:06,534 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-12-13 15:18:06,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:18:06,535 INFO L225 Difference]: With dead ends: 185 [2022-12-13 15:18:06,535 INFO L226 Difference]: Without dead ends: 185 [2022-12-13 15:18:06,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:18:06,536 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 133 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:18:06,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 162 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:18:06,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-12-13 15:18:06,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 148. [2022-12-13 15:18:06,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 129 states have (on average 1.4108527131782946) internal successors, (182), 147 states have internal predecessors, (182), 0 states have call successors, (0), 0 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 15:18:06,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 182 transitions. [2022-12-13 15:18:06,540 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 182 transitions. Word has length 24 [2022-12-13 15:18:06,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:18:06,540 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 182 transitions. [2022-12-13 15:18:06,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 15:18:06,541 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 182 transitions. [2022-12-13 15:18:06,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 15:18:06,541 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:18:06,541 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] [2022-12-13 15:18:06,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 15:18:06,541 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:18:06,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:18:06,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1677094767, now seen corresponding path program 1 times [2022-12-13 15:18:06,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:18:06,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105540892] [2022-12-13 15:18:06,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:06,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:18:06,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:06,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:18:06,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:18:06,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105540892] [2022-12-13 15:18:06,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105540892] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:18:06,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:18:06,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:18:06,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751622568] [2022-12-13 15:18:06,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:18:06,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 15:18:06,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:18:06,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 15:18:06,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:18:06,644 INFO L87 Difference]: Start difference. First operand 148 states and 182 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 15:18:06,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:18:06,788 INFO L93 Difference]: Finished difference Result 238 states and 293 transitions. [2022-12-13 15:18:06,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 15:18:06,789 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-12-13 15:18:06,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:18:06,790 INFO L225 Difference]: With dead ends: 238 [2022-12-13 15:18:06,790 INFO L226 Difference]: Without dead ends: 238 [2022-12-13 15:18:06,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:18:06,790 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 136 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:18:06,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 180 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:18:06,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-12-13 15:18:06,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 166. [2022-12-13 15:18:06,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 147 states have (on average 1.4625850340136055) internal successors, (215), 165 states have internal predecessors, (215), 0 states have call successors, (0), 0 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 15:18:06,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 215 transitions. [2022-12-13 15:18:06,795 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 215 transitions. Word has length 24 [2022-12-13 15:18:06,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:18:06,796 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 215 transitions. [2022-12-13 15:18:06,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 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 15:18:06,796 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 215 transitions. [2022-12-13 15:18:06,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 15:18:06,796 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:18:06,796 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] [2022-12-13 15:18:06,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 15:18:06,797 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:18:06,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:18:06,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1024288817, now seen corresponding path program 1 times [2022-12-13 15:18:06,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:18:06,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890339683] [2022-12-13 15:18:06,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:06,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:18:06,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:07,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:18:07,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:18:07,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890339683] [2022-12-13 15:18:07,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890339683] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:18:07,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:18:07,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 15:18:07,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101036063] [2022-12-13 15:18:07,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:18:07,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:18:07,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:18:07,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:18:07,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:18:07,004 INFO L87 Difference]: Start difference. First operand 166 states and 215 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 15:18:07,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:18:07,177 INFO L93 Difference]: Finished difference Result 238 states and 303 transitions. [2022-12-13 15:18:07,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 15:18:07,177 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2022-12-13 15:18:07,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:18:07,178 INFO L225 Difference]: With dead ends: 238 [2022-12-13 15:18:07,178 INFO L226 Difference]: Without dead ends: 238 [2022-12-13 15:18:07,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-12-13 15:18:07,179 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 108 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:18:07,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 310 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:18:07,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-12-13 15:18:07,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 175. [2022-12-13 15:18:07,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 156 states have (on average 1.4487179487179487) internal successors, (226), 174 states have internal predecessors, (226), 0 states have call successors, (0), 0 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 15:18:07,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 226 transitions. [2022-12-13 15:18:07,184 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 226 transitions. Word has length 27 [2022-12-13 15:18:07,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:18:07,184 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 226 transitions. [2022-12-13 15:18:07,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 15:18:07,184 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 226 transitions. [2022-12-13 15:18:07,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 15:18:07,185 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:18:07,185 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] [2022-12-13 15:18:07,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 15:18:07,185 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:18:07,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:18:07,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1688183339, now seen corresponding path program 1 times [2022-12-13 15:18:07,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:18:07,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433563770] [2022-12-13 15:18:07,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:07,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:18:07,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:07,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:18:07,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:18:07,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433563770] [2022-12-13 15:18:07,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433563770] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:18:07,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:18:07,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:18:07,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426528278] [2022-12-13 15:18:07,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:18:07,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 15:18:07,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:18:07,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 15:18:07,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:18:07,246 INFO L87 Difference]: Start difference. First operand 175 states and 226 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:18:07,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:18:07,342 INFO L93 Difference]: Finished difference Result 205 states and 261 transitions. [2022-12-13 15:18:07,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 15:18:07,342 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-12-13 15:18:07,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:18:07,343 INFO L225 Difference]: With dead ends: 205 [2022-12-13 15:18:07,343 INFO L226 Difference]: Without dead ends: 205 [2022-12-13 15:18:07,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:18:07,344 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 131 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 203 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 15:18:07,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 203 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:18:07,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-12-13 15:18:07,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 193. [2022-12-13 15:18:07,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 174 states have (on average 1.5) internal successors, (261), 192 states have internal predecessors, (261), 0 states have call successors, (0), 0 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 15:18:07,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 261 transitions. [2022-12-13 15:18:07,349 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 261 transitions. Word has length 28 [2022-12-13 15:18:07,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:18:07,349 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 261 transitions. [2022-12-13 15:18:07,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:18:07,350 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 261 transitions. [2022-12-13 15:18:07,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-13 15:18:07,350 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:18:07,350 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] [2022-12-13 15:18:07,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 15:18:07,350 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:18:07,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:18:07,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1397370251, now seen corresponding path program 1 times [2022-12-13 15:18:07,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:18:07,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176953211] [2022-12-13 15:18:07,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:07,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:18:07,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:07,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:18:07,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:18:07,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176953211] [2022-12-13 15:18:07,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176953211] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:18:07,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165484433] [2022-12-13 15:18:07,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:07,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:18:07,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:18:07,407 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:18:07,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 15:18:07,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:07,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 15:18:07,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:18:07,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:18:07,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:18:07,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:18:07,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165484433] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:18:07,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:18:07,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-12-13 15:18:07,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955345160] [2022-12-13 15:18:07,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:18:07,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 15:18:07,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:18:07,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 15:18:07,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:18:07,559 INFO L87 Difference]: Start difference. First operand 193 states and 261 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 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 15:18:07,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:18:07,580 INFO L93 Difference]: Finished difference Result 247 states and 325 transitions. [2022-12-13 15:18:07,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:18:07,580 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 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 31 [2022-12-13 15:18:07,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:18:07,581 INFO L225 Difference]: With dead ends: 247 [2022-12-13 15:18:07,581 INFO L226 Difference]: Without dead ends: 247 [2022-12-13 15:18:07,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:18:07,582 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 50 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:18:07,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 269 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:18:07,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-12-13 15:18:07,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 231. [2022-12-13 15:18:07,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 212 states have (on average 1.5235849056603774) internal successors, (323), 230 states have internal predecessors, (323), 0 states have call successors, (0), 0 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 15:18:07,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 323 transitions. [2022-12-13 15:18:07,588 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 323 transitions. Word has length 31 [2022-12-13 15:18:07,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:18:07,588 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 323 transitions. [2022-12-13 15:18:07,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 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 15:18:07,588 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 323 transitions. [2022-12-13 15:18:07,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-13 15:18:07,589 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:18:07,589 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] [2022-12-13 15:18:07,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 15:18:07,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:18:07,790 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:18:07,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:18:07,790 INFO L85 PathProgramCache]: Analyzing trace with hash 368804521, now seen corresponding path program 1 times [2022-12-13 15:18:07,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:18:07,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881624696] [2022-12-13 15:18:07,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:07,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:18:07,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:07,890 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 15:18:07,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:18:07,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881624696] [2022-12-13 15:18:07,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881624696] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:18:07,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884048208] [2022-12-13 15:18:07,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:07,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:18:07,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:18:07,892 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:18:07,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 15:18:07,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:07,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 15:18:07,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:18:08,053 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 13 treesize of output 9 [2022-12-13 15:18:08,073 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 15:18:08,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:18:08,115 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~x~0#1.base_35| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_main_~x~0#1.base_35|) 0)) (= (store |c_#valid| |v_ULTIMATE.start_main_~x~0#1.base_35| 0) |c_ULTIMATE.start_main_old_#valid#1|))) is different from false [2022-12-13 15:18:08,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-12-13 15:18:08,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884048208] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:18:08,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:18:08,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 7 [2022-12-13 15:18:08,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745003370] [2022-12-13 15:18:08,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:18:08,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 15:18:08,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:18:08,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 15:18:08,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=31, Unknown=1, NotChecked=10, Total=56 [2022-12-13 15:18:08,132 INFO L87 Difference]: Start difference. First operand 231 states and 323 transitions. Second operand has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 15:18:08,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:18:08,315 INFO L93 Difference]: Finished difference Result 236 states and 327 transitions. [2022-12-13 15:18:08,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:18:08,316 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 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 32 [2022-12-13 15:18:08,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:18:08,317 INFO L225 Difference]: With dead ends: 236 [2022-12-13 15:18:08,317 INFO L226 Difference]: Without dead ends: 224 [2022-12-13 15:18:08,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=77, Unknown=1, NotChecked=18, Total=132 [2022-12-13 15:18:08,317 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 22 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:18:08,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 281 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 213 Invalid, 0 Unknown, 57 Unchecked, 0.1s Time] [2022-12-13 15:18:08,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-12-13 15:18:08,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2022-12-13 15:18:08,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 205 states have (on average 1.5365853658536586) internal successors, (315), 223 states have internal predecessors, (315), 0 states have call successors, (0), 0 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 15:18:08,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 315 transitions. [2022-12-13 15:18:08,322 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 315 transitions. Word has length 32 [2022-12-13 15:18:08,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:18:08,323 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 315 transitions. [2022-12-13 15:18:08,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.714285714285714) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 15:18:08,323 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 315 transitions. [2022-12-13 15:18:08,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-13 15:18:08,323 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:18:08,323 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-12-13 15:18:08,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 15:18:08,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:18:08,525 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:18:08,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:18:08,526 INFO L85 PathProgramCache]: Analyzing trace with hash -917642468, now seen corresponding path program 1 times [2022-12-13 15:18:08,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:18:08,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873132644] [2022-12-13 15:18:08,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:08,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:18:08,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:08,732 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:18:08,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:18:08,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873132644] [2022-12-13 15:18:08,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873132644] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:18:08,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184597935] [2022-12-13 15:18:08,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:08,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:18:08,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:18:08,734 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:18:08,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 15:18:08,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:08,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 15:18:08,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:18:08,850 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 15:18:08,888 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-13 15:18:08,888 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 17 treesize of output 21 [2022-12-13 15:18:08,907 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:18:08,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:18:09,069 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:18:09,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184597935] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:18:09,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:18:09,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 6 [2022-12-13 15:18:09,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191958857] [2022-12-13 15:18:09,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:18:09,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:18:09,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:18:09,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:18:09,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:18:09,071 INFO L87 Difference]: Start difference. First operand 224 states and 315 transitions. Second operand has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 15:18:09,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:18:09,181 INFO L93 Difference]: Finished difference Result 245 states and 332 transitions. [2022-12-13 15:18:09,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:18:09,181 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 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 33 [2022-12-13 15:18:09,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:18:09,183 INFO L225 Difference]: With dead ends: 245 [2022-12-13 15:18:09,183 INFO L226 Difference]: Without dead ends: 245 [2022-12-13 15:18:09,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:18:09,184 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 140 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:18:09,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 181 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:18:09,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-12-13 15:18:09,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 223. [2022-12-13 15:18:09,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 205 states have (on average 1.526829268292683) internal successors, (313), 222 states have internal predecessors, (313), 0 states have call successors, (0), 0 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 15:18:09,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 313 transitions. [2022-12-13 15:18:09,191 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 313 transitions. Word has length 33 [2022-12-13 15:18:09,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:18:09,191 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 313 transitions. [2022-12-13 15:18:09,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 15:18:09,191 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 313 transitions. [2022-12-13 15:18:09,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-13 15:18:09,192 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:18:09,192 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-12-13 15:18:09,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-13 15:18:09,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-13 15:18:09,392 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:18:09,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:18:09,393 INFO L85 PathProgramCache]: Analyzing trace with hash -917642467, now seen corresponding path program 1 times [2022-12-13 15:18:09,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:18:09,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143613158] [2022-12-13 15:18:09,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:09,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:18:09,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:09,505 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:18:09,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:18:09,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143613158] [2022-12-13 15:18:09,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143613158] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:18:09,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211418551] [2022-12-13 15:18:09,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:09,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:18:09,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:18:09,507 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:18:09,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 15:18:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:09,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 15:18:09,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:18:09,624 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 15:18:09,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:18:09,719 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 14 treesize of output 16 [2022-12-13 15:18:09,726 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 15:18:09,726 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 15:18:09,775 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:18:09,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:18:12,090 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 50 treesize of output 46 [2022-12-13 15:18:12,141 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:18:12,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211418551] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:18:12,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:18:12,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 11 [2022-12-13 15:18:12,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133475833] [2022-12-13 15:18:12,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:18:12,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 15:18:12,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:18:12,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 15:18:12,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-12-13 15:18:12,143 INFO L87 Difference]: Start difference. First operand 223 states and 313 transitions. Second operand has 12 states, 11 states have (on average 8.272727272727273) internal successors, (91), 12 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 15:18:12,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:18:12,382 INFO L93 Difference]: Finished difference Result 244 states and 330 transitions. [2022-12-13 15:18:12,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:18:12,383 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 8.272727272727273) internal successors, (91), 12 states have internal predecessors, (91), 0 states have call successors, (0), 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 33 [2022-12-13 15:18:12,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:18:12,384 INFO L225 Difference]: With dead ends: 244 [2022-12-13 15:18:12,384 INFO L226 Difference]: Without dead ends: 244 [2022-12-13 15:18:12,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-12-13 15:18:12,385 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 274 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 15:18:12,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 215 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 15:18:12,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-12-13 15:18:12,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 222. [2022-12-13 15:18:12,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 205 states have (on average 1.5170731707317073) internal successors, (311), 221 states have internal predecessors, (311), 0 states have call successors, (0), 0 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 15:18:12,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 311 transitions. [2022-12-13 15:18:12,391 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 311 transitions. Word has length 33 [2022-12-13 15:18:12,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:18:12,392 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 311 transitions. [2022-12-13 15:18:12,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 8.272727272727273) internal successors, (91), 12 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 15:18:12,392 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 311 transitions. [2022-12-13 15:18:12,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-13 15:18:12,392 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:18:12,392 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 15:18:12,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 15:18:12,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-13 15:18:12,594 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:18:12,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:18:12,596 INFO L85 PathProgramCache]: Analyzing trace with hash -499896363, now seen corresponding path program 1 times [2022-12-13 15:18:12,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:18:12,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539835744] [2022-12-13 15:18:12,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:12,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:18:12,670 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 15:18:12,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851294539] [2022-12-13 15:18:12,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:12,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:18:12,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:18:12,674 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:18:12,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 15:18:12,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:12,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 15:18:12,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:18:12,873 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 15:18:12,891 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 11 treesize of output 7 [2022-12-13 15:18:12,914 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-12-13 15:18:12,915 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 15:18:12,957 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-13 15:18:12,957 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 33 treesize of output 24 [2022-12-13 15:18:12,984 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 15:18:12,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:18:12,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:18:13,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:18:13,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:18:13,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539835744] [2022-12-13 15:18:13,121 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 15:18:13,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851294539] [2022-12-13 15:18:13,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851294539] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:18:13,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:18:13,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-12-13 15:18:13,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613904797] [2022-12-13 15:18:13,121 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:18:13,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 15:18:13,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:18:13,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 15:18:13,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-12-13 15:18:13,122 INFO L87 Difference]: Start difference. First operand 222 states and 311 transitions. Second operand has 12 states, 11 states have (on average 5.0) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 15:18:13,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:18:13,379 INFO L93 Difference]: Finished difference Result 241 states and 328 transitions. [2022-12-13 15:18:13,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 15:18:13,379 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.0) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 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 35 [2022-12-13 15:18:13,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:18:13,381 INFO L225 Difference]: With dead ends: 241 [2022-12-13 15:18:13,381 INFO L226 Difference]: Without dead ends: 241 [2022-12-13 15:18:13,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:18:13,382 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 55 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 15:18:13,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 354 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 15:18:13,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-12-13 15:18:13,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 221. [2022-12-13 15:18:13,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 205 states have (on average 1.5073170731707317) internal successors, (309), 220 states have internal predecessors, (309), 0 states have call successors, (0), 0 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 15:18:13,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 309 transitions. [2022-12-13 15:18:13,385 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 309 transitions. Word has length 35 [2022-12-13 15:18:13,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:18:13,385 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 309 transitions. [2022-12-13 15:18:13,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.0) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 15:18:13,385 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 309 transitions. [2022-12-13 15:18:13,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-13 15:18:13,385 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:18:13,385 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 15:18:13,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-13 15:18:13,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-13 15:18:13,586 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:18:13,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:18:13,586 INFO L85 PathProgramCache]: Analyzing trace with hash -499896362, now seen corresponding path program 1 times [2022-12-13 15:18:13,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:18:13,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556613756] [2022-12-13 15:18:13,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:13,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:18:13,607 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 15:18:13,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1169093327] [2022-12-13 15:18:13,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:13,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:18:13,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:18:13,608 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:18:13,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 15:18:13,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:13,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 15:18:13,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:18:13,723 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 15:18:13,766 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 11 treesize of output 7 [2022-12-13 15:18:13,771 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 11 treesize of output 7 [2022-12-13 15:18:13,816 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-13 15:18:13,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 32 [2022-12-13 15:18:13,830 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-12-13 15:18:13,831 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 15:18:13,895 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-13 15:18:13,896 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 39 treesize of output 30 [2022-12-13 15:18:13,912 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-12-13 15:18:13,912 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 38 treesize of output 29 [2022-12-13 15:18:13,955 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 31 treesize of output 19 [2022-12-13 15:18:13,959 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 26 treesize of output 14 [2022-12-13 15:18:13,973 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:18:13,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:18:20,259 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 50 treesize of output 46 [2022-12-13 15:18:20,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:18:20,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:18:20,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556613756] [2022-12-13 15:18:20,331 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 15:18:20,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169093327] [2022-12-13 15:18:20,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169093327] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:18:20,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:18:20,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-12-13 15:18:20,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124429770] [2022-12-13 15:18:20,332 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:18:20,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 15:18:20,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:18:20,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 15:18:20,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-12-13 15:18:20,333 INFO L87 Difference]: Start difference. First operand 221 states and 309 transitions. Second operand has 16 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 15:18:20,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:18:20,987 INFO L93 Difference]: Finished difference Result 314 states and 428 transitions. [2022-12-13 15:18:20,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 15:18:20,987 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 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 35 [2022-12-13 15:18:20,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:18:20,988 INFO L225 Difference]: With dead ends: 314 [2022-12-13 15:18:20,988 INFO L226 Difference]: Without dead ends: 314 [2022-12-13 15:18:20,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2022-12-13 15:18:20,989 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 162 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 15:18:20,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 575 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 15:18:20,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-12-13 15:18:20,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 208. [2022-12-13 15:18:20,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 193 states have (on average 1.528497409326425) internal successors, (295), 207 states have internal predecessors, (295), 0 states have call successors, (0), 0 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 15:18:20,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 295 transitions. [2022-12-13 15:18:20,994 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 295 transitions. Word has length 35 [2022-12-13 15:18:20,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:18:20,994 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 295 transitions. [2022-12-13 15:18:20,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 15:18:20,994 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 295 transitions. [2022-12-13 15:18:20,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-13 15:18:20,995 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:18:20,995 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] [2022-12-13 15:18:20,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 15:18:21,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:18:21,196 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:18:21,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:18:21,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1032157181, now seen corresponding path program 1 times [2022-12-13 15:18:21,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:18:21,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775924608] [2022-12-13 15:18:21,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:21,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:18:21,211 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 15:18:21,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1171613918] [2022-12-13 15:18:21,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:21,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:18:21,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:18:21,212 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:18:21,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 15:18:21,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:21,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 15:18:21,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:18:21,336 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 15:18:21,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:18:21,388 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 14 treesize of output 16 [2022-12-13 15:18:21,396 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 15:18:21,396 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 15:18:21,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:18:21,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:18:21,629 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 50 treesize of output 46 [2022-12-13 15:18:21,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:18:21,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:18:21,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775924608] [2022-12-13 15:18:21,667 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 15:18:21,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171613918] [2022-12-13 15:18:21,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171613918] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:18:21,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:18:21,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2022-12-13 15:18:21,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849617672] [2022-12-13 15:18:21,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:18:21,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 15:18:21,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:18:21,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 15:18:21,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-12-13 15:18:21,669 INFO L87 Difference]: Start difference. First operand 208 states and 295 transitions. Second operand has 10 states, 9 states have (on average 7.555555555555555) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 15:18:21,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:18:21,769 INFO L93 Difference]: Finished difference Result 234 states and 321 transitions. [2022-12-13 15:18:21,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:18:21,770 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.555555555555555) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 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 36 [2022-12-13 15:18:21,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:18:21,771 INFO L225 Difference]: With dead ends: 234 [2022-12-13 15:18:21,771 INFO L226 Difference]: Without dead ends: 234 [2022-12-13 15:18:21,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-12-13 15:18:21,771 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 336 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:18:21,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 102 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:18:21,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-12-13 15:18:21,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 213. [2022-12-13 15:18:21,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 198 states have (on average 1.52020202020202) internal successors, (301), 212 states have internal predecessors, (301), 0 states have call successors, (0), 0 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 15:18:21,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 301 transitions. [2022-12-13 15:18:21,776 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 301 transitions. Word has length 36 [2022-12-13 15:18:21,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:18:21,776 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 301 transitions. [2022-12-13 15:18:21,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.555555555555555) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 15:18:21,776 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 301 transitions. [2022-12-13 15:18:21,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-13 15:18:21,777 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:18:21,777 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] [2022-12-13 15:18:21,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 15:18:21,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:18:21,978 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:18:21,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:18:21,978 INFO L85 PathProgramCache]: Analyzing trace with hash 234396292, now seen corresponding path program 1 times [2022-12-13 15:18:21,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:18:21,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17035600] [2022-12-13 15:18:21,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:21,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:18:21,990 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 15:18:21,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1038513567] [2022-12-13 15:18:21,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:21,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:18:21,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:18:21,991 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:18:21,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 15:18:22,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:22,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 15:18:22,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:18:22,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:18:22,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:18:22,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:18:22,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17035600] [2022-12-13 15:18:22,167 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 15:18:22,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038513567] [2022-12-13 15:18:22,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038513567] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:18:22,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:18:22,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 15:18:22,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773332002] [2022-12-13 15:18:22,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:18:22,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:18:22,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:18:22,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:18:22,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:18:22,169 INFO L87 Difference]: Start difference. First operand 213 states and 301 transitions. Second operand has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:18:22,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:18:22,292 INFO L93 Difference]: Finished difference Result 229 states and 306 transitions. [2022-12-13 15:18:22,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:18:22,292 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-12-13 15:18:22,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:18:22,293 INFO L225 Difference]: With dead ends: 229 [2022-12-13 15:18:22,293 INFO L226 Difference]: Without dead ends: 229 [2022-12-13 15:18:22,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-12-13 15:18:22,293 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 135 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:18:22,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 146 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:18:22,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-12-13 15:18:22,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 213. [2022-12-13 15:18:22,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 198 states have (on average 1.5101010101010102) internal successors, (299), 212 states have internal predecessors, (299), 0 states have call successors, (0), 0 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 15:18:22,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 299 transitions. [2022-12-13 15:18:22,297 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 299 transitions. Word has length 38 [2022-12-13 15:18:22,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:18:22,298 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 299 transitions. [2022-12-13 15:18:22,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:18:22,298 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 299 transitions. [2022-12-13 15:18:22,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-13 15:18:22,298 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:18:22,298 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] [2022-12-13 15:18:22,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 15:18:22,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:18:22,499 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:18:22,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:18:22,500 INFO L85 PathProgramCache]: Analyzing trace with hash -716826511, now seen corresponding path program 1 times [2022-12-13 15:18:22,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:18:22,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616603344] [2022-12-13 15:18:22,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:22,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:18:22,560 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 15:18:22,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [509104288] [2022-12-13 15:18:22,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:22,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:18:22,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:18:22,562 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:18:22,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 15:18:22,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:22,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 15:18:22,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:18:22,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 15:18:22,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:18:22,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:18:22,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616603344] [2022-12-13 15:18:22,709 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 15:18:22,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509104288] [2022-12-13 15:18:22,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509104288] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:18:22,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:18:22,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 15:18:22,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849699483] [2022-12-13 15:18:22,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:18:22,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 15:18:22,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:18:22,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 15:18:22,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 15:18:22,711 INFO L87 Difference]: Start difference. First operand 213 states and 299 transitions. Second operand has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 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 15:18:22,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:18:22,768 INFO L93 Difference]: Finished difference Result 221 states and 295 transitions. [2022-12-13 15:18:22,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:18:22,768 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 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 41 [2022-12-13 15:18:22,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:18:22,769 INFO L225 Difference]: With dead ends: 221 [2022-12-13 15:18:22,769 INFO L226 Difference]: Without dead ends: 221 [2022-12-13 15:18:22,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-13 15:18:22,770 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 126 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:18:22,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 134 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:18:22,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-12-13 15:18:22,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 193. [2022-12-13 15:18:22,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 178 states have (on average 1.4606741573033708) internal successors, (260), 192 states have internal predecessors, (260), 0 states have call successors, (0), 0 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 15:18:22,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 260 transitions. [2022-12-13 15:18:22,774 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 260 transitions. Word has length 41 [2022-12-13 15:18:22,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:18:22,774 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 260 transitions. [2022-12-13 15:18:22,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 0 states have call successors, (0), 0 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 15:18:22,774 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 260 transitions. [2022-12-13 15:18:22,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-13 15:18:22,775 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:18:22,775 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] [2022-12-13 15:18:22,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-13 15:18:22,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:18:22,975 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:18:22,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:18:22,975 INFO L85 PathProgramCache]: Analyzing trace with hash -716826470, now seen corresponding path program 1 times [2022-12-13 15:18:22,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:18:22,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646637138] [2022-12-13 15:18:22,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:22,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:18:22,990 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 15:18:22,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1681645354] [2022-12-13 15:18:22,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:22,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:18:22,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:18:22,991 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:18:22,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 15:18:23,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:23,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 15:18:23,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:18:23,144 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 15:18:23,172 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 11 treesize of output 7 [2022-12-13 15:18:23,226 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 17 treesize of output 9 [2022-12-13 15:18:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:18:23,239 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:18:23,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:18:23,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646637138] [2022-12-13 15:18:23,240 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 15:18:23,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681645354] [2022-12-13 15:18:23,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681645354] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:18:23,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:18:23,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 15:18:23,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279502127] [2022-12-13 15:18:23,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:18:23,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 15:18:23,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:18:23,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 15:18:23,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-12-13 15:18:23,241 INFO L87 Difference]: Start difference. First operand 193 states and 260 transitions. Second operand has 9 states, 8 states have (on average 5.125) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 15:18:23,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:18:23,507 INFO L93 Difference]: Finished difference Result 271 states and 347 transitions. [2022-12-13 15:18:23,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 15:18:23,507 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2022-12-13 15:18:23,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:18:23,508 INFO L225 Difference]: With dead ends: 271 [2022-12-13 15:18:23,508 INFO L226 Difference]: Without dead ends: 271 [2022-12-13 15:18:23,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-12-13 15:18:23,509 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 146 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 15:18:23,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 252 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 15:18:23,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-12-13 15:18:23,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 202. [2022-12-13 15:18:23,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 187 states have (on average 1.4598930481283423) internal successors, (273), 201 states have internal predecessors, (273), 0 states have call successors, (0), 0 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 15:18:23,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 273 transitions. [2022-12-13 15:18:23,513 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 273 transitions. Word has length 41 [2022-12-13 15:18:23,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:18:23,514 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 273 transitions. [2022-12-13 15:18:23,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 15:18:23,514 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 273 transitions. [2022-12-13 15:18:23,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-13 15:18:23,514 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:18:23,514 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] [2022-12-13 15:18:23,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 15:18:23,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 15:18:23,715 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:18:23,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:18:23,716 INFO L85 PathProgramCache]: Analyzing trace with hash -716826469, now seen corresponding path program 1 times [2022-12-13 15:18:23,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:18:23,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878571728] [2022-12-13 15:18:23,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:23,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:18:23,769 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 15:18:23,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1527243335] [2022-12-13 15:18:23,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:23,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:18:23,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:18:23,771 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:18:23,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 15:18:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:23,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-13 15:18:23,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:18:23,946 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 11 treesize of output 7 [2022-12-13 15:18:23,951 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 11 treesize of output 7 [2022-12-13 15:18:24,021 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 17 treesize of output 9 [2022-12-13 15:18:24,024 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 15 treesize of output 7 [2022-12-13 15:18:24,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:18:24,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:18:24,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:18:24,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878571728] [2022-12-13 15:18:24,045 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 15:18:24,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527243335] [2022-12-13 15:18:24,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527243335] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:18:24,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:18:24,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 15:18:24,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031554631] [2022-12-13 15:18:24,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:18:24,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 15:18:24,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:18:24,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 15:18:24,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-13 15:18:24,047 INFO L87 Difference]: Start difference. First operand 202 states and 273 transitions. Second operand has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 15:18:24,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:18:24,421 INFO L93 Difference]: Finished difference Result 306 states and 393 transitions. [2022-12-13 15:18:24,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:18:24,422 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2022-12-13 15:18:24,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:18:24,423 INFO L225 Difference]: With dead ends: 306 [2022-12-13 15:18:24,423 INFO L226 Difference]: Without dead ends: 306 [2022-12-13 15:18:24,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2022-12-13 15:18:24,424 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 241 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 15:18:24,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 376 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 15:18:24,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-12-13 15:18:24,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 202. [2022-12-13 15:18:24,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 187 states have (on average 1.4491978609625669) internal successors, (271), 201 states have internal predecessors, (271), 0 states have call successors, (0), 0 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 15:18:24,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 271 transitions. [2022-12-13 15:18:24,427 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 271 transitions. Word has length 41 [2022-12-13 15:18:24,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:18:24,427 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 271 transitions. [2022-12-13 15:18:24,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 15:18:24,427 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 271 transitions. [2022-12-13 15:18:24,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-13 15:18:24,427 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:18:24,427 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] [2022-12-13 15:18:24,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 15:18:24,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-13 15:18:24,628 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:18:24,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:18:24,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1675466949, now seen corresponding path program 1 times [2022-12-13 15:18:24,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:18:24,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419736694] [2022-12-13 15:18:24,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:24,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:18:24,694 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 15:18:24,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [781473512] [2022-12-13 15:18:24,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:24,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:18:24,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:18:24,697 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:18:24,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 15:18:24,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:24,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 15:18:24,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:18:24,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:18:24,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:18:24,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:18:24,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419736694] [2022-12-13 15:18:24,865 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 15:18:24,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781473512] [2022-12-13 15:18:24,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781473512] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:18:24,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:18:24,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:18:24,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846485545] [2022-12-13 15:18:24,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:18:24,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:18:24,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:18:24,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:18:24,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:18:24,866 INFO L87 Difference]: Start difference. First operand 202 states and 271 transitions. Second operand has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 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 15:18:24,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:18:24,918 INFO L93 Difference]: Finished difference Result 224 states and 294 transitions. [2022-12-13 15:18:24,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:18:24,919 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 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 43 [2022-12-13 15:18:24,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:18:24,919 INFO L225 Difference]: With dead ends: 224 [2022-12-13 15:18:24,919 INFO L226 Difference]: Without dead ends: 224 [2022-12-13 15:18:24,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 40 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 15:18:24,920 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 17 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:18:24,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 157 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:18:24,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-12-13 15:18:24,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 200. [2022-12-13 15:18:24,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 187 states have (on average 1.4010695187165776) internal successors, (262), 199 states have internal predecessors, (262), 0 states have call successors, (0), 0 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 15:18:24,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 262 transitions. [2022-12-13 15:18:24,922 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 262 transitions. Word has length 43 [2022-12-13 15:18:24,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:18:24,923 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 262 transitions. [2022-12-13 15:18:24,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 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 15:18:24,923 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 262 transitions. [2022-12-13 15:18:24,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-13 15:18:24,923 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:18:24,923 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] [2022-12-13 15:18:24,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 15:18:25,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:18:25,125 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:18:25,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:18:25,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1675466948, now seen corresponding path program 1 times [2022-12-13 15:18:25,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:18:25,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298921788] [2022-12-13 15:18:25,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:25,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:18:25,180 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 15:18:25,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40547754] [2022-12-13 15:18:25,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:25,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:18:25,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:18:25,183 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:18:25,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 15:18:25,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:25,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 15:18:25,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:18:25,378 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 11 treesize of output 7 [2022-12-13 15:18:25,381 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 11 treesize of output 7 [2022-12-13 15:18:25,448 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 23 treesize of output 15 [2022-12-13 15:18:25,450 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 11 [2022-12-13 15:18:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:18:25,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:18:25,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:18:25,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298921788] [2022-12-13 15:18:25,498 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 15:18:25,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40547754] [2022-12-13 15:18:25,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40547754] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:18:25,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:18:25,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 15:18:25,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889506096] [2022-12-13 15:18:25,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:18:25,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 15:18:25,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:18:25,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 15:18:25,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-12-13 15:18:25,499 INFO L87 Difference]: Start difference. First operand 200 states and 262 transitions. Second operand has 11 states, 10 states have (on average 4.3) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 15:18:25,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:18:25,989 INFO L93 Difference]: Finished difference Result 342 states and 430 transitions. [2022-12-13 15:18:25,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 15:18:25,990 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.3) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2022-12-13 15:18:25,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:18:25,990 INFO L225 Difference]: With dead ends: 342 [2022-12-13 15:18:25,990 INFO L226 Difference]: Without dead ends: 342 [2022-12-13 15:18:25,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-12-13 15:18:25,991 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 298 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 15:18:25,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 471 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 15:18:25,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-12-13 15:18:25,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 204. [2022-12-13 15:18:25,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 191 states have (on average 1.3926701570680629) internal successors, (266), 203 states have internal predecessors, (266), 0 states have call successors, (0), 0 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 15:18:25,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 266 transitions. [2022-12-13 15:18:25,993 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 266 transitions. Word has length 43 [2022-12-13 15:18:25,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:18:25,994 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 266 transitions. [2022-12-13 15:18:25,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.3) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 15:18:25,994 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 266 transitions. [2022-12-13 15:18:25,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-13 15:18:25,994 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:18:25,994 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-12-13 15:18:25,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 15:18:26,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-13 15:18:26,195 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:18:26,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:18:26,196 INFO L85 PathProgramCache]: Analyzing trace with hash 829486443, now seen corresponding path program 1 times [2022-12-13 15:18:26,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:18:26,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245607980] [2022-12-13 15:18:26,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:26,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:18:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:26,717 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:18:26,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:18:26,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245607980] [2022-12-13 15:18:26,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245607980] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:18:26,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899256515] [2022-12-13 15:18:26,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:18:26,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:18:26,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:18:26,719 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:18:26,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 15:18:26,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:18:26,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 68 conjunts are in the unsatisfiable core [2022-12-13 15:18:26,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:18:26,886 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 15:18:26,897 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 11 treesize of output 7 [2022-12-13 15:18:26,902 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 11 treesize of output 7 [2022-12-13 15:18:26,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:18:26,928 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 21 treesize of output 20 [2022-12-13 15:18:26,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:18:26,933 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 21 treesize of output 20 [2022-12-13 15:18:26,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:18:26,944 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 21 treesize of output 20 [2022-12-13 15:18:26,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:18:26,951 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 21 treesize of output 20 [2022-12-13 15:18:27,045 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-13 15:18:27,045 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 17 treesize of output 21 [2022-12-13 15:18:27,106 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 14 treesize of output 16 [2022-12-13 15:18:27,111 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 14 treesize of output 16 [2022-12-13 15:18:27,124 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 14 treesize of output 16 [2022-12-13 15:18:27,135 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 14 treesize of output 16 [2022-12-13 15:18:27,149 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 14 treesize of output 16 [2022-12-13 15:18:27,160 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 14 treesize of output 16 [2022-12-13 15:18:27,173 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 14 treesize of output 16 [2022-12-13 15:18:27,179 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 14 treesize of output 16 [2022-12-13 15:18:27,197 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 14 treesize of output 16 [2022-12-13 15:18:27,210 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 14 treesize of output 16 [2022-12-13 15:18:27,330 INFO L321 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-12-13 15:18:27,331 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 15:18:27,342 INFO L321 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-12-13 15:18:27,343 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 20 [2022-12-13 15:18:27,418 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 41 treesize of output 39 [2022-12-13 15:18:27,423 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 48 treesize of output 48 [2022-12-13 15:18:27,695 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:18:27,695 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 72 treesize of output 68 [2022-12-13 15:18:27,705 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:18:27,705 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 59 treesize of output 41 [2022-12-13 15:18:27,844 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:18:27,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:18:27,986 WARN L837 $PredicateComparison]: unable to prove that (and (or (forall ((v_ArrVal_2269 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2269) |c_ULTIMATE.start_main_~first~0#1.base|) |c_ULTIMATE.start_main_~first~0#1.offset|)) 1)) (forall ((v_ArrVal_2268 (Array Int Int))) (= |c_ULTIMATE.start_main_~first~0#1.offset| (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2268) |c_ULTIMATE.start_main_~first~0#1.base|) |c_ULTIMATE.start_main_~first~0#1.offset|)))) (forall ((v_ArrVal_2269 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2269) |c_ULTIMATE.start_main_~first~0#1.base|) |c_ULTIMATE.start_main_~first~0#1.offset|))) (or (= .cse0 |c_ULTIMATE.start_main_~first~0#1.base|) (= (select |c_#valid| .cse0) 1))))) is different from false [2022-12-13 15:18:30,279 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2269 (Array Int Int)) (|ULTIMATE.start_main_~last~0#1.offset| Int) (v_ArrVal_2262 (Array Int Int))) (let ((.cse0 (select (select (store (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2262))) (store .cse1 |c_ULTIMATE.start_main_~last~0#1.base| (store (select .cse1 |c_ULTIMATE.start_main_~last~0#1.base|) (+ |ULTIMATE.start_main_~last~0#1.offset| 12) |c_ULTIMATE.start_main_~x~0#1.base|))) |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2269) |c_ULTIMATE.start_main_~first~0#1.base|) |c_ULTIMATE.start_main_~first~0#1.offset|))) (or (= (select |c_#valid| .cse0) 1) (= .cse0 |c_ULTIMATE.start_main_~first~0#1.base|)))) (forall ((|ULTIMATE.start_main_~last~0#1.offset| Int) (v_ArrVal_2263 (Array Int Int)) (v_ArrVal_2262 (Array Int Int))) (let ((.cse3 (+ |ULTIMATE.start_main_~last~0#1.offset| 12))) (or (forall ((v_ArrVal_2269 (Array Int Int))) (= (select |c_#valid| (select (select (store (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2262))) (store .cse2 |c_ULTIMATE.start_main_~last~0#1.base| (store (select .cse2 |c_ULTIMATE.start_main_~last~0#1.base|) .cse3 |c_ULTIMATE.start_main_~x~0#1.base|))) |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2269) |c_ULTIMATE.start_main_~first~0#1.base|) |c_ULTIMATE.start_main_~first~0#1.offset|)) 1)) (forall ((v_ArrVal_2268 (Array Int Int))) (= |c_ULTIMATE.start_main_~first~0#1.offset| (select (select (store (let ((.cse4 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2263))) (store .cse4 |c_ULTIMATE.start_main_~last~0#1.base| (store (select .cse4 |c_ULTIMATE.start_main_~last~0#1.base|) .cse3 |c_ULTIMATE.start_main_~x~0#1.offset|))) |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_2268) |c_ULTIMATE.start_main_~first~0#1.base|) |c_ULTIMATE.start_main_~first~0#1.offset|))))))) is different from false [2022-12-13 15:18:31,478 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:18:31,478 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 90 treesize of output 66 [2022-12-13 15:18:31,482 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 151 treesize of output 145 [2022-12-13 15:18:31,488 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 97 treesize of output 91 [2022-12-13 15:18:31,497 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 89 treesize of output 85 [2022-12-13 15:18:31,501 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 143 treesize of output 135 [2022-12-13 15:18:31,537 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:18:31,537 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 47 treesize of output 40 [2022-12-13 15:18:31,543 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 90 treesize of output 86 [2022-12-13 15:18:31,550 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 55 treesize of output 51 [2022-12-13 15:18:31,559 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 47 treesize of output 45 [2022-12-13 15:18:31,567 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:18:31,568 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 42 treesize of output 35 [2022-12-13 15:18:31,574 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 70 treesize of output 66 [2022-12-13 15:18:31,580 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 78 treesize of output 74 [2022-12-13 15:18:31,589 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 49 treesize of output 45 [2022-12-13 15:18:31,599 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 41 treesize of output 39 [2022-12-13 15:18:31,604 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 70 treesize of output 66 [2022-12-13 15:18:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2022-12-13 15:18:35,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899256515] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:18:35,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:18:35,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 31 [2022-12-13 15:18:35,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245380859] [2022-12-13 15:18:35,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:18:35,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 15:18:35,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:18:35,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 15:18:35,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=764, Unknown=4, NotChecked=114, Total=992 [2022-12-13 15:18:35,728 INFO L87 Difference]: Start difference. First operand 204 states and 266 transitions. Second operand has 32 states, 31 states have (on average 4.032258064516129) internal successors, (125), 32 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 15:18:41,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 15:18:43,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:18:48,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:18:54,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 15:19:00,551 WARN L233 SmtUtils]: Spent 6.19s on a formula simplification. DAG size of input: 46 DAG size of output: 42 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 15:19:01,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:19:01,310 INFO L93 Difference]: Finished difference Result 351 states and 431 transitions. [2022-12-13 15:19:01,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-13 15:19:01,310 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.032258064516129) internal successors, (125), 32 states have internal predecessors, (125), 0 states have call successors, (0), 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 45 [2022-12-13 15:19:01,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:19:01,311 INFO L225 Difference]: With dead ends: 351 [2022-12-13 15:19:01,311 INFO L226 Difference]: Without dead ends: 351 [2022-12-13 15:19:01,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=640, Invalid=3390, Unknown=10, NotChecked=250, Total=4290 [2022-12-13 15:19:01,312 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 389 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 1605 mSolverCounterSat, 59 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 2018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1605 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 345 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2022-12-13 15:19:01,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 1127 Invalid, 2018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1605 Invalid, 9 Unknown, 345 Unchecked, 11.8s Time] [2022-12-13 15:19:01,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-12-13 15:19:01,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 247. [2022-12-13 15:19:01,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 234 states have (on average 1.3717948717948718) internal successors, (321), 246 states have internal predecessors, (321), 0 states have call successors, (0), 0 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 15:19:01,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 321 transitions. [2022-12-13 15:19:01,316 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 321 transitions. Word has length 45 [2022-12-13 15:19:01,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:19:01,316 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 321 transitions. [2022-12-13 15:19:01,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.032258064516129) internal successors, (125), 32 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 15:19:01,316 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 321 transitions. [2022-12-13 15:19:01,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-13 15:19:01,317 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:19:01,317 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-12-13 15:19:01,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 15:19:01,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:19:01,518 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:19:01,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:19:01,519 INFO L85 PathProgramCache]: Analyzing trace with hash 829486444, now seen corresponding path program 1 times [2022-12-13 15:19:01,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:19:01,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858755733] [2022-12-13 15:19:01,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:19:01,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:19:01,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:19:02,225 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:19:02,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:19:02,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858755733] [2022-12-13 15:19:02,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858755733] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:19:02,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128996718] [2022-12-13 15:19:02,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:19:02,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:19:02,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:19:02,227 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:19:02,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 15:19:02,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:19:02,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-13 15:19:02,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:19:02,397 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 15:19:02,414 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 11 treesize of output 7 [2022-12-13 15:19:02,420 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 11 treesize of output 7 [2022-12-13 15:19:02,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:19:02,428 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 21 treesize of output 20 [2022-12-13 15:19:02,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:19:02,437 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 21 treesize of output 20 [2022-12-13 15:19:02,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:19:02,447 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 21 treesize of output 20 [2022-12-13 15:19:02,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:19:02,454 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 21 treesize of output 20 [2022-12-13 15:19:02,557 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 15:19:02,558 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 15:19:02,602 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 14 treesize of output 16 [2022-12-13 15:19:02,607 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 14 treesize of output 16 [2022-12-13 15:19:02,620 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 14 treesize of output 16 [2022-12-13 15:19:02,625 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 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 15:19:02,633 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 14 treesize of output 16 [2022-12-13 15:19:02,639 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 14 treesize of output 16 [2022-12-13 15:19:02,653 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 14 treesize of output 16 [2022-12-13 15:19:02,663 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 14 treesize of output 16 [2022-12-13 15:19:02,671 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 14 treesize of output 16 [2022-12-13 15:19:02,678 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 14 treesize of output 16 [2022-12-13 15:19:02,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:19:02,764 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 21 treesize of output 20 [2022-12-13 15:19:02,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:19:02,770 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 21 treesize of output 20 [2022-12-13 15:19:02,798 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 14 treesize of output 16 [2022-12-13 15:19:02,803 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 14 treesize of output 16 [2022-12-13 15:19:02,873 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:19:02,874 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 15 treesize of output 10 [2022-12-13 15:19:02,879 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:19:02,879 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 15 treesize of output 10 [2022-12-13 15:19:02,910 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:19:02,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:19:33,739 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:19:33,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 55 [2022-12-13 15:19:33,744 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 70 treesize of output 66 [2022-12-13 15:19:33,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:19:33,749 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 32 treesize of output 28 [2022-12-13 15:19:33,754 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 5 treesize of output 3 [2022-12-13 15:19:33,761 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-12-13 15:19:33,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 1 [2022-12-13 15:19:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:19:33,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128996718] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:19:33,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:19:33,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 14] total 27 [2022-12-13 15:19:33,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146729735] [2022-12-13 15:19:33,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:19:33,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 15:19:33,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:19:33,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 15:19:33,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=584, Unknown=23, NotChecked=0, Total=702 [2022-12-13 15:19:33,827 INFO L87 Difference]: Start difference. First operand 247 states and 321 transitions. Second operand has 27 states, 27 states have (on average 3.925925925925926) internal successors, (106), 27 states have internal predecessors, (106), 0 states have call successors, (0), 0 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 15:19:36,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:19:36,206 INFO L93 Difference]: Finished difference Result 310 states and 384 transitions. [2022-12-13 15:19:36,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 15:19:36,207 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.925925925925926) internal successors, (106), 27 states have internal predecessors, (106), 0 states have call successors, (0), 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 45 [2022-12-13 15:19:36,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:19:36,208 INFO L225 Difference]: With dead ends: 310 [2022-12-13 15:19:36,208 INFO L226 Difference]: Without dead ends: 310 [2022-12-13 15:19:36,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 31.6s TimeCoverageRelationStatistics Valid=330, Invalid=1537, Unknown=25, NotChecked=0, Total=1892 [2022-12-13 15:19:36,210 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 345 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 76 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-13 15:19:36,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 692 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 753 Invalid, 1 Unknown, 0 Unchecked, 1.5s Time] [2022-12-13 15:19:36,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-12-13 15:19:36,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 199. [2022-12-13 15:19:36,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 186 states have (on average 1.39247311827957) internal successors, (259), 198 states have internal predecessors, (259), 0 states have call successors, (0), 0 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 15:19:36,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 259 transitions. [2022-12-13 15:19:36,215 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 259 transitions. Word has length 45 [2022-12-13 15:19:36,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:19:36,215 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 259 transitions. [2022-12-13 15:19:36,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.925925925925926) internal successors, (106), 27 states have internal predecessors, (106), 0 states have call successors, (0), 0 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 15:19:36,215 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 259 transitions. [2022-12-13 15:19:36,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-13 15:19:36,215 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:19:36,216 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] [2022-12-13 15:19:36,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 15:19:36,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:19:36,416 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:19:36,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:19:36,417 INFO L85 PathProgramCache]: Analyzing trace with hash 489001563, now seen corresponding path program 1 times [2022-12-13 15:19:36,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:19:36,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825534489] [2022-12-13 15:19:36,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:19:36,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:19:36,433 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 15:19:36,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1807156772] [2022-12-13 15:19:36,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:19:36,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:19:36,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:19:36,435 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:19:36,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 15:19:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:19:36,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 15:19:36,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:19:36,609 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 11 treesize of output 7 [2022-12-13 15:19:36,659 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 15 treesize of output 7 [2022-12-13 15:19:36,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:19:36,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:19:36,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:19:36,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825534489] [2022-12-13 15:19:36,682 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 15:19:36,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807156772] [2022-12-13 15:19:36,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807156772] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:19:36,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:19:36,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 15:19:36,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080357128] [2022-12-13 15:19:36,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:19:36,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 15:19:36,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:19:36,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 15:19:36,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-12-13 15:19:36,683 INFO L87 Difference]: Start difference. First operand 199 states and 259 transitions. Second operand has 10 states, 9 states have (on average 5.0) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 15:19:37,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:19:37,042 INFO L93 Difference]: Finished difference Result 330 states and 415 transitions. [2022-12-13 15:19:37,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 15:19:37,042 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.0) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2022-12-13 15:19:37,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:19:37,044 INFO L225 Difference]: With dead ends: 330 [2022-12-13 15:19:37,044 INFO L226 Difference]: Without dead ends: 330 [2022-12-13 15:19:37,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2022-12-13 15:19:37,044 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 323 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 15:19:37,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 364 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 15:19:37,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-12-13 15:19:37,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 230. [2022-12-13 15:19:37,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 217 states have (on average 1.391705069124424) internal successors, (302), 229 states have internal predecessors, (302), 0 states have call successors, (0), 0 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 15:19:37,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 302 transitions. [2022-12-13 15:19:37,049 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 302 transitions. Word has length 45 [2022-12-13 15:19:37,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:19:37,049 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 302 transitions. [2022-12-13 15:19:37,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.0) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 15:19:37,049 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 302 transitions. [2022-12-13 15:19:37,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-13 15:19:37,050 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:19:37,050 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-12-13 15:19:37,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 15:19:37,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-13 15:19:37,251 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:19:37,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:19:37,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1360903564, now seen corresponding path program 2 times [2022-12-13 15:19:37,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:19:37,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371051803] [2022-12-13 15:19:37,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:19:37,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:19:37,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:19:37,299 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 15:19:37,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:19:37,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371051803] [2022-12-13 15:19:37,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371051803] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:19:37,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145332541] [2022-12-13 15:19:37,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:19:37,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:19:37,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:19:37,300 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:19:37,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 15:19:37,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:19:37,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:19:37,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 15:19:37,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:19:37,498 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 15:19:37,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:19:37,520 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 15:19:37,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145332541] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:19:37,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:19:37,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-12-13 15:19:37,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476284048] [2022-12-13 15:19:37,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:19:37,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:19:37,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:19:37,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:19:37,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:19:37,521 INFO L87 Difference]: Start difference. First operand 230 states and 302 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 15:19:37,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:19:37,558 INFO L93 Difference]: Finished difference Result 219 states and 283 transitions. [2022-12-13 15:19:37,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:19:37,559 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 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 46 [2022-12-13 15:19:37,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:19:37,560 INFO L225 Difference]: With dead ends: 219 [2022-12-13 15:19:37,560 INFO L226 Difference]: Without dead ends: 219 [2022-12-13 15:19:37,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 93 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 15:19:37,561 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 80 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:19:37,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 124 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:19:37,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-12-13 15:19:37,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 213. [2022-12-13 15:19:37,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 200 states have (on average 1.38) internal successors, (276), 212 states have internal predecessors, (276), 0 states have call successors, (0), 0 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 15:19:37,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 276 transitions. [2022-12-13 15:19:37,564 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 276 transitions. Word has length 46 [2022-12-13 15:19:37,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:19:37,564 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 276 transitions. [2022-12-13 15:19:37,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 15:19:37,564 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 276 transitions. [2022-12-13 15:19:37,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-13 15:19:37,565 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:19:37,565 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] [2022-12-13 15:19:37,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 15:19:37,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-12-13 15:19:37,765 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:19:37,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:19:37,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1178585278, now seen corresponding path program 1 times [2022-12-13 15:19:37,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:19:37,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618490193] [2022-12-13 15:19:37,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:19:37,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:19:37,779 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 15:19:37,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1251036332] [2022-12-13 15:19:37,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:19:37,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:19:37,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:19:37,780 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:19:37,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 15:19:37,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:19:37,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 15:19:37,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:19:37,921 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 15:19:37,945 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 15:19:37,946 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 15:19:37,968 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 11 treesize of output 7 [2022-12-13 15:19:37,993 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:19:37,993 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 16 treesize of output 16 [2022-12-13 15:19:38,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:19:38,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:19:38,087 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 11 treesize of output 9 [2022-12-13 15:19:38,089 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 20 treesize of output 18 [2022-12-13 15:19:38,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:19:38,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:19:38,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618490193] [2022-12-13 15:19:38,190 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 15:19:38,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251036332] [2022-12-13 15:19:38,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251036332] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:19:38,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:19:38,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2022-12-13 15:19:38,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745129651] [2022-12-13 15:19:38,190 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:19:38,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 15:19:38,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:19:38,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 15:19:38,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-12-13 15:19:38,191 INFO L87 Difference]: Start difference. First operand 213 states and 276 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 15:19:38,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:19:38,567 INFO L93 Difference]: Finished difference Result 271 states and 321 transitions. [2022-12-13 15:19:38,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 15:19:38,567 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 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 46 [2022-12-13 15:19:38,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:19:38,568 INFO L225 Difference]: With dead ends: 271 [2022-12-13 15:19:38,568 INFO L226 Difference]: Without dead ends: 270 [2022-12-13 15:19:38,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2022-12-13 15:19:38,569 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 254 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 15:19:38,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 443 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 15:19:38,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-12-13 15:19:38,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 213. [2022-12-13 15:19:38,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 200 states have (on average 1.375) internal successors, (275), 212 states have internal predecessors, (275), 0 states have call successors, (0), 0 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 15:19:38,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 275 transitions. [2022-12-13 15:19:38,571 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 275 transitions. Word has length 46 [2022-12-13 15:19:38,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:19:38,572 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 275 transitions. [2022-12-13 15:19:38,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 15:19:38,572 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 275 transitions. [2022-12-13 15:19:38,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-13 15:19:38,572 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:19:38,573 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2022-12-13 15:19:38,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 15:19:38,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:19:38,774 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:19:38,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:19:38,774 INFO L85 PathProgramCache]: Analyzing trace with hash -2020813251, now seen corresponding path program 1 times [2022-12-13 15:19:38,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:19:38,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351534966] [2022-12-13 15:19:38,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:19:38,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:19:38,809 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 15:19:38,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786460582] [2022-12-13 15:19:38,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:19:38,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:19:38,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:19:38,812 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:19:38,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 15:19:38,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:19:38,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 59 conjunts are in the unsatisfiable core [2022-12-13 15:19:38,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:19:39,005 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 11 treesize of output 7 [2022-12-13 15:19:39,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:19:39,017 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 21 treesize of output 20 [2022-12-13 15:19:39,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:19:39,024 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 21 treesize of output 20 [2022-12-13 15:19:39,074 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 15:19:39,074 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 23 treesize of output 18 [2022-12-13 15:19:39,139 INFO L321 Elim1Store]: treesize reduction 29, result has 38.3 percent of original size [2022-12-13 15:19:39,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 40 [2022-12-13 15:19:39,146 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 11 treesize of output 7 [2022-12-13 15:19:39,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:19:39,172 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 15:19:39,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:19:39,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:19:39,205 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:19:39,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-12-13 15:19:39,217 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 11 treesize of output 7 [2022-12-13 15:19:39,230 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-13 15:19:39,230 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 36 [2022-12-13 15:19:39,404 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 15 treesize of output 7 [2022-12-13 15:19:39,499 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 15:19:39,499 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 42 treesize of output 17 [2022-12-13 15:19:39,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:19:39,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:19:39,642 INFO L321 Elim1Store]: treesize reduction 5, result has 75.0 percent of original size [2022-12-13 15:19:39,643 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 24 treesize of output 23 [2022-12-13 15:19:44,120 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~y~0#1.base| Int) (v_ArrVal_2982 (Array Int Int)) (v_ArrVal_2979 Int)) (= (select (select (let ((.cse0 (let ((.cse3 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|))) (let ((.cse2 (select .cse3 |c_ULTIMATE.start_main_~x~0#1.offset|))) (store (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| (store .cse3 (+ |c_ULTIMATE.start_main_~x~0#1.offset| 8) v_ArrVal_2979)))) (store .cse1 |ULTIMATE.start_main_~y~0#1.base| (store (select .cse1 |ULTIMATE.start_main_~y~0#1.base|) 0 .cse2))) .cse2 v_ArrVal_2982))))) (store .cse0 |c_ULTIMATE.start_main_~x~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset| |ULTIMATE.start_main_~y~0#1.base|))) |ULTIMATE.start_main_~y~0#1.base|) 0) |c_ULTIMATE.start_main_~x~0#1.base|)) is different from false [2022-12-13 15:19:44,133 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~y~0#1.base| Int) (v_ArrVal_2982 (Array Int Int)) (v_ArrVal_2977 Int) (v_ArrVal_2979 Int)) (= (select (select (let ((.cse0 (let ((.cse3 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|))) (let ((.cse2 (select .cse3 |c_ULTIMATE.start_main_~x~0#1.offset|))) (store (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| (store (store .cse3 (+ |c_ULTIMATE.start_main_~x~0#1.offset| 4) v_ArrVal_2977) (+ |c_ULTIMATE.start_main_~x~0#1.offset| 8) v_ArrVal_2979)))) (store .cse1 |ULTIMATE.start_main_~y~0#1.base| (store (select .cse1 |ULTIMATE.start_main_~y~0#1.base|) 0 .cse2))) .cse2 v_ArrVal_2982))))) (store .cse0 |c_ULTIMATE.start_main_~x~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset| |ULTIMATE.start_main_~y~0#1.base|))) |ULTIMATE.start_main_~y~0#1.base|) 0) |c_ULTIMATE.start_main_~x~0#1.base|)) is different from false [2022-12-13 15:19:44,172 INFO L321 Elim1Store]: treesize reduction 73, result has 41.1 percent of original size [2022-12-13 15:19:44,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 57 treesize of output 64 [2022-12-13 15:19:44,177 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:19:44,178 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 21 treesize of output 25 [2022-12-13 15:19:44,192 INFO L321 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2022-12-13 15:19:44,192 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 68 [2022-12-13 15:19:44,199 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 15:19:44,200 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 32 treesize of output 27 [2022-12-13 15:19:44,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:19:44,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:19:44,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351534966] [2022-12-13 15:19:44,211 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 15:19:44,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786460582] [2022-12-13 15:19:44,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786460582] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:19:44,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:19:44,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 33 [2022-12-13 15:19:44,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369301484] [2022-12-13 15:19:44,211 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:19:44,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 15:19:44,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:19:44,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 15:19:44,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=835, Unknown=52, NotChecked=122, Total=1122 [2022-12-13 15:19:44,212 INFO L87 Difference]: Start difference. First operand 213 states and 275 transitions. Second operand has 34 states, 33 states have (on average 2.393939393939394) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 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 15:19:51,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:19:51,909 INFO L93 Difference]: Finished difference Result 386 states and 485 transitions. [2022-12-13 15:19:51,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 15:19:51,909 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.393939393939394) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 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 46 [2022-12-13 15:19:51,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:19:51,910 INFO L225 Difference]: With dead ends: 386 [2022-12-13 15:19:51,910 INFO L226 Difference]: Without dead ends: 386 [2022-12-13 15:19:51,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=340, Invalid=2457, Unknown=73, NotChecked=210, Total=3080 [2022-12-13 15:19:51,911 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 491 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 1353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 15:19:51,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [491 Valid, 933 Invalid, 1353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1058 Invalid, 0 Unknown, 269 Unchecked, 0.7s Time] [2022-12-13 15:19:51,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-12-13 15:19:51,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 244. [2022-12-13 15:19:51,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 231 states have (on average 1.354978354978355) internal successors, (313), 243 states have internal predecessors, (313), 0 states have call successors, (0), 0 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 15:19:51,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 313 transitions. [2022-12-13 15:19:51,916 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 313 transitions. Word has length 46 [2022-12-13 15:19:51,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:19:51,916 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 313 transitions. [2022-12-13 15:19:51,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.393939393939394) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 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 15:19:51,916 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 313 transitions. [2022-12-13 15:19:51,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-13 15:19:51,917 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:19:51,917 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2022-12-13 15:19:51,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 15:19:52,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-13 15:19:52,117 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:19:52,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:19:52,118 INFO L85 PathProgramCache]: Analyzing trace with hash -2020813250, now seen corresponding path program 1 times [2022-12-13 15:19:52,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:19:52,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768441313] [2022-12-13 15:19:52,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:19:52,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:19:52,129 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 15:19:52,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [168257584] [2022-12-13 15:19:52,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:19:52,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:19:52,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:19:52,130 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:19:52,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 15:19:52,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:19:52,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 78 conjunts are in the unsatisfiable core [2022-12-13 15:19:52,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:19:52,326 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 11 treesize of output 7 [2022-12-13 15:19:52,330 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 11 treesize of output 7 [2022-12-13 15:19:52,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:19:52,344 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 21 treesize of output 20 [2022-12-13 15:19:52,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:19:52,356 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 21 treesize of output 20 [2022-12-13 15:19:52,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:19:52,366 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 21 treesize of output 20 [2022-12-13 15:19:52,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:19:52,371 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 21 treesize of output 20 [2022-12-13 15:19:52,443 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 15:19:52,444 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 23 treesize of output 18 [2022-12-13 15:19:52,459 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-13 15:19:52,459 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 23 treesize of output 18 [2022-12-13 15:19:52,547 INFO L321 Elim1Store]: treesize reduction 29, result has 38.3 percent of original size [2022-12-13 15:19:52,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 48 [2022-12-13 15:19:52,569 INFO L321 Elim1Store]: treesize reduction 12, result has 64.7 percent of original size [2022-12-13 15:19:52,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 39 [2022-12-13 15:19:52,578 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 5 treesize of output 3 [2022-12-13 15:19:52,586 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 7 treesize of output 5 [2022-12-13 15:19:52,595 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 5 treesize of output 3 [2022-12-13 15:19:52,605 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 11 treesize of output 7 [2022-12-13 15:19:52,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:19:52,655 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 15:19:52,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:19:52,658 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 15:19:52,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:19:52,670 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 15:19:52,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:19:52,673 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 33 treesize of output 32 [2022-12-13 15:19:52,690 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-13 15:19:52,691 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 31 treesize of output 34 [2022-12-13 15:19:52,702 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-12-13 15:19:52,702 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 35 treesize of output 42 [2022-12-13 15:19:52,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:19:52,885 INFO L321 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2022-12-13 15:19:52,885 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 5 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 38 [2022-12-13 15:19:52,894 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 15:19:52,895 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 4 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 16 [2022-12-13 15:19:52,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:19:52,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:20:04,010 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse7 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|))) (let ((.cse3 (+ |c_ULTIMATE.start_main_~x~0#1.offset| 8)) (.cse4 (select .cse7 |c_ULTIMATE.start_main_~x~0#1.offset|))) (and (forall ((|ULTIMATE.start_main_~y~0#1.base| Int) (v_ArrVal_3135 (Array Int Int)) (v_ArrVal_3127 Int)) (= |c_ULTIMATE.start_main_~x~0#1.offset| (select (select (let ((.cse0 (store (let ((.cse2 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base|))) (let ((.cse1 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| (store .cse2 .cse3 v_ArrVal_3127)))) (store .cse1 |ULTIMATE.start_main_~y~0#1.base| (store (select .cse1 |ULTIMATE.start_main_~y~0#1.base|) 0 (select .cse2 |c_ULTIMATE.start_main_~x~0#1.offset|))))) .cse4 v_ArrVal_3135))) (store .cse0 |c_ULTIMATE.start_main_~x~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset| 0))) |ULTIMATE.start_main_~y~0#1.base|) 0))) (forall ((v_ArrVal_3129 Int) (|ULTIMATE.start_main_~y~0#1.base| Int) (v_ArrVal_3136 (Array Int Int))) (= (select (select (let ((.cse5 (store (let ((.cse6 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| (store .cse7 .cse3 v_ArrVal_3129)))) (store .cse6 |ULTIMATE.start_main_~y~0#1.base| (store (select .cse6 |ULTIMATE.start_main_~y~0#1.base|) 0 .cse4))) .cse4 v_ArrVal_3136))) (store .cse5 |c_ULTIMATE.start_main_~x~0#1.base| (store (select .cse5 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset| |ULTIMATE.start_main_~y~0#1.base|))) |ULTIMATE.start_main_~y~0#1.base|) 0) |c_ULTIMATE.start_main_~x~0#1.base|))))) is different from false [2022-12-13 15:20:04,030 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base|))) (let ((.cse4 (+ |c_ULTIMATE.start_main_~x~0#1.offset| 4)) (.cse5 (+ |c_ULTIMATE.start_main_~x~0#1.offset| 8)) (.cse2 (select .cse3 |c_ULTIMATE.start_main_~x~0#1.offset|))) (and (forall ((v_ArrVal_3129 Int) (v_ArrVal_3126 Int) (|ULTIMATE.start_main_~y~0#1.base| Int) (v_ArrVal_3136 (Array Int Int))) (= (select (select (let ((.cse0 (store (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| (store (store .cse3 .cse4 v_ArrVal_3126) .cse5 v_ArrVal_3129)))) (store .cse1 |ULTIMATE.start_main_~y~0#1.base| (store (select .cse1 |ULTIMATE.start_main_~y~0#1.base|) 0 .cse2))) .cse2 v_ArrVal_3136))) (store .cse0 |c_ULTIMATE.start_main_~x~0#1.base| (store (select .cse0 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset| |ULTIMATE.start_main_~y~0#1.base|))) |ULTIMATE.start_main_~y~0#1.base|) 0) |c_ULTIMATE.start_main_~x~0#1.base|)) (forall ((|ULTIMATE.start_main_~y~0#1.base| Int) (v_ArrVal_3135 (Array Int Int)) (v_ArrVal_3127 Int) (v_ArrVal_3124 Int)) (= (select (select (let ((.cse6 (store (let ((.cse8 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base|))) (let ((.cse7 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| (store (store .cse8 .cse4 v_ArrVal_3124) .cse5 v_ArrVal_3127)))) (store .cse7 |ULTIMATE.start_main_~y~0#1.base| (store (select .cse7 |ULTIMATE.start_main_~y~0#1.base|) 0 (select .cse8 |c_ULTIMATE.start_main_~x~0#1.offset|))))) .cse2 v_ArrVal_3135))) (store .cse6 |c_ULTIMATE.start_main_~x~0#1.base| (store (select .cse6 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset| 0))) |ULTIMATE.start_main_~y~0#1.base|) 0) |c_ULTIMATE.start_main_~x~0#1.offset|))))) is different from false [2022-12-13 15:20:04,084 INFO L321 Elim1Store]: treesize reduction 73, result has 41.1 percent of original size [2022-12-13 15:20:04,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 57 treesize of output 64 [2022-12-13 15:20:04,096 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:20:04,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2022-12-13 15:20:04,120 INFO L321 Elim1Store]: treesize reduction 17, result has 55.3 percent of original size [2022-12-13 15:20:04,120 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 6 case distinctions, treesize of input 72 treesize of output 68 [2022-12-13 15:20:04,132 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 15:20:04,132 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 12 treesize of output 11 [2022-12-13 15:20:04,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:20:04,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:20:04,140 INFO L321 Elim1Store]: treesize reduction 53, result has 1.9 percent of original size [2022-12-13 15:20:04,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 57 treesize of output 1 [2022-12-13 15:20:04,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:20:04,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:20:04,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768441313] [2022-12-13 15:20:04,145 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 15:20:04,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168257584] [2022-12-13 15:20:04,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168257584] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:20:04,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:20:04,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 33 [2022-12-13 15:20:04,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132551529] [2022-12-13 15:20:04,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:20:04,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 15:20:04,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:20:04,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 15:20:04,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=759, Unknown=52, NotChecked=118, Total=1056 [2022-12-13 15:20:04,147 INFO L87 Difference]: Start difference. First operand 244 states and 313 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 15:20:08,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:20:08,042 INFO L93 Difference]: Finished difference Result 428 states and 546 transitions. [2022-12-13 15:20:08,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 15:20:08,042 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 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 46 [2022-12-13 15:20:08,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:20:08,044 INFO L225 Difference]: With dead ends: 428 [2022-12-13 15:20:08,044 INFO L226 Difference]: Without dead ends: 428 [2022-12-13 15:20:08,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=334, Invalid=2053, Unknown=71, NotChecked=194, Total=2652 [2022-12-13 15:20:08,044 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 375 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 939 SdHoareTripleChecker+Invalid, 1241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 339 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-13 15:20:08,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 939 Invalid, 1241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 872 Invalid, 1 Unknown, 339 Unchecked, 0.9s Time] [2022-12-13 15:20:08,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-12-13 15:20:08,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 247. [2022-12-13 15:20:08,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 234 states have (on average 1.3461538461538463) internal successors, (315), 246 states have internal predecessors, (315), 0 states have call successors, (0), 0 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 15:20:08,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 315 transitions. [2022-12-13 15:20:08,047 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 315 transitions. Word has length 46 [2022-12-13 15:20:08,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:20:08,047 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 315 transitions. [2022-12-13 15:20:08,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 15:20:08,048 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 315 transitions. [2022-12-13 15:20:08,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-13 15:20:08,048 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:20:08,048 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] [2022-12-13 15:20:08,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 15:20:08,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-13 15:20:08,249 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:20:08,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:20:08,250 INFO L85 PathProgramCache]: Analyzing trace with hash -2020820556, now seen corresponding path program 1 times [2022-12-13 15:20:08,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:20:08,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031568230] [2022-12-13 15:20:08,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:20:08,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:20:08,299 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 15:20:08,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1076667575] [2022-12-13 15:20:08,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:20:08,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:20:08,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:20:08,301 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:20:08,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 15:20:08,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:20:08,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 15:20:08,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:20:08,548 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 11 treesize of output 7 [2022-12-13 15:20:08,617 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 17 treesize of output 9 [2022-12-13 15:20:08,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:20:08,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 15:20:08,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:20:08,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031568230] [2022-12-13 15:20:08,652 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 15:20:08,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076667575] [2022-12-13 15:20:08,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076667575] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:20:08,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:20:08,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-13 15:20:08,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750789310] [2022-12-13 15:20:08,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:20:08,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 15:20:08,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:20:08,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 15:20:08,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-12-13 15:20:08,654 INFO L87 Difference]: Start difference. First operand 247 states and 315 transitions. Second operand has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 15:20:09,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:20:09,066 INFO L93 Difference]: Finished difference Result 309 states and 377 transitions. [2022-12-13 15:20:09,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 15:20:09,067 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2022-12-13 15:20:09,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:20:09,068 INFO L225 Difference]: With dead ends: 309 [2022-12-13 15:20:09,068 INFO L226 Difference]: Without dead ends: 309 [2022-12-13 15:20:09,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-12-13 15:20:09,068 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 180 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 15:20:09,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 459 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 15:20:09,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-12-13 15:20:09,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 248. [2022-12-13 15:20:09,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 235 states have (on average 1.3404255319148937) internal successors, (315), 247 states have internal predecessors, (315), 0 states have call successors, (0), 0 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 15:20:09,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 315 transitions. [2022-12-13 15:20:09,071 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 315 transitions. Word has length 46 [2022-12-13 15:20:09,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:20:09,071 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 315 transitions. [2022-12-13 15:20:09,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 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 15:20:09,071 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 315 transitions. [2022-12-13 15:20:09,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-13 15:20:09,072 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:20:09,072 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-12-13 15:20:09,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-13 15:20:09,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-13 15:20:09,273 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:20:09,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:20:09,274 INFO L85 PathProgramCache]: Analyzing trace with hash 2045271335, now seen corresponding path program 1 times [2022-12-13 15:20:09,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:20:09,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587805883] [2022-12-13 15:20:09,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:20:09,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:20:09,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:20:09,700 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:20:09,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:20:09,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587805883] [2022-12-13 15:20:09,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587805883] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:20:09,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74072794] [2022-12-13 15:20:09,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:20:09,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:20:09,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:20:09,701 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:20:09,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 15:20:09,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:20:09,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-13 15:20:09,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:20:09,898 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 15:20:09,986 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-13 15:20:09,986 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 17 treesize of output 21 [2022-12-13 15:20:10,124 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 11 treesize of output 7 [2022-12-13 15:20:10,157 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 15:20:10,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-12-13 15:20:10,229 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 15:20:10,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-12-13 15:20:10,296 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:20:10,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:20:10,375 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~first~0#1.offset| 12))) (and (forall ((v_ArrVal_3440 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_3440) |c_ULTIMATE.start_main_~first~0#1.base|) .cse0)) 1)) (forall ((v_ArrVal_3440 (Array Int Int))) (not (= |c_ULTIMATE.start_main_~first~0#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_3440) |c_ULTIMATE.start_main_~first~0#1.base|) .cse0)))))) is different from false [2022-12-13 15:20:10,382 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:20:10,382 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 24 treesize of output 25 [2022-12-13 15:20:10,390 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:20:10,390 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 40 treesize of output 39 [2022-12-13 15:20:10,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2022-12-13 15:20:10,416 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:20:10,416 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 23 treesize of output 24 [2022-12-13 15:20:10,427 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:20:10,428 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 39 treesize of output 38 [2022-12-13 15:20:10,432 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 22 treesize of output 18 [2022-12-13 15:20:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:20:10,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74072794] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:20:10,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:20:10,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 23 [2022-12-13 15:20:10,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238048414] [2022-12-13 15:20:10,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:20:10,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 15:20:10,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:20:10,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 15:20:10,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=420, Unknown=1, NotChecked=42, Total=552 [2022-12-13 15:20:10,656 INFO L87 Difference]: Start difference. First operand 248 states and 315 transitions. Second operand has 24 states, 23 states have (on average 4.913043478260869) internal successors, (113), 24 states have internal predecessors, (113), 0 states have call successors, (0), 0 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 15:20:13,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:20:13,551 INFO L93 Difference]: Finished difference Result 370 states and 455 transitions. [2022-12-13 15:20:13,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 15:20:13,551 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.913043478260869) internal successors, (113), 24 states have internal predecessors, (113), 0 states have call successors, (0), 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 49 [2022-12-13 15:20:13,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:20:13,552 INFO L225 Difference]: With dead ends: 370 [2022-12-13 15:20:13,552 INFO L226 Difference]: Without dead ends: 370 [2022-12-13 15:20:13,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=228, Invalid=831, Unknown=1, NotChecked=62, Total=1122 [2022-12-13 15:20:13,552 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 237 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 15:20:13,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 836 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 933 Invalid, 0 Unknown, 129 Unchecked, 0.6s Time] [2022-12-13 15:20:13,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-12-13 15:20:13,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 337. [2022-12-13 15:20:13,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 324 states have (on average 1.3271604938271604) internal successors, (430), 336 states have internal predecessors, (430), 0 states have call successors, (0), 0 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 15:20:13,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 430 transitions. [2022-12-13 15:20:13,557 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 430 transitions. Word has length 49 [2022-12-13 15:20:13,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:20:13,558 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 430 transitions. [2022-12-13 15:20:13,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.913043478260869) internal successors, (113), 24 states have internal predecessors, (113), 0 states have call successors, (0), 0 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 15:20:13,558 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 430 transitions. [2022-12-13 15:20:13,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-13 15:20:13,558 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:20:13,558 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-12-13 15:20:13,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-13 15:20:13,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-13 15:20:13,759 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:20:13,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:20:13,760 INFO L85 PathProgramCache]: Analyzing trace with hash 2045271336, now seen corresponding path program 1 times [2022-12-13 15:20:13,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:20:13,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93699908] [2022-12-13 15:20:13,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:20:13,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:20:13,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:20:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:20:14,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:20:14,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93699908] [2022-12-13 15:20:14,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93699908] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:20:14,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4498761] [2022-12-13 15:20:14,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:20:14,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:20:14,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:20:14,626 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:20:14,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 15:20:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:20:14,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-13 15:20:14,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:20:14,788 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 15:20:14,875 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 15:20:14,889 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 15:20:14,890 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 15:20:15,039 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 11 treesize of output 7 [2022-12-13 15:20:15,049 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 11 treesize of output 7 [2022-12-13 15:20:15,086 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 15:20:15,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-12-13 15:20:15,091 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 15:20:15,168 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 15:20:15,171 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 15 treesize of output 7 [2022-12-13 15:20:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:20:15,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:20:15,297 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~first~0#1.offset| 12))) (and (forall ((v_ArrVal_3604 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_3604) |c_ULTIMATE.start_main_~first~0#1.base|) .cse0) 12))) (forall ((v_ArrVal_3603 (Array Int Int)) (v_ArrVal_3604 (Array Int Int))) (<= (+ 16 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_3604) |c_ULTIMATE.start_main_~first~0#1.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_3603) |c_ULTIMATE.start_main_~first~0#1.base|) .cse0)))))) is different from false [2022-12-13 15:20:15,303 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:20:15,304 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 24 treesize of output 25 [2022-12-13 15:20:15,310 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:20:15,311 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 40 treesize of output 39 [2022-12-13 15:20:15,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2022-12-13 15:20:15,328 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:20:15,328 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 45 treesize of output 46 [2022-12-13 15:20:15,334 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:20:15,334 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 35 treesize of output 36 [2022-12-13 15:20:15,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:20:15,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:20:15,339 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2022-12-13 15:20:15,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 15:20:15,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:20:15,343 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2022-12-13 15:20:15,589 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:20:15,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4498761] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:20:15,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:20:15,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 23 [2022-12-13 15:20:15,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563121804] [2022-12-13 15:20:15,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:20:15,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 15:20:15,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:20:15,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 15:20:15,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=438, Unknown=1, NotChecked=42, Total=552 [2022-12-13 15:20:15,590 INFO L87 Difference]: Start difference. First operand 337 states and 430 transitions. Second operand has 24 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 24 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 15:20:16,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:20:16,835 INFO L93 Difference]: Finished difference Result 413 states and 503 transitions. [2022-12-13 15:20:16,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 15:20:16,836 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 24 states have internal predecessors, (130), 0 states have call successors, (0), 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 49 [2022-12-13 15:20:16,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:20:16,837 INFO L225 Difference]: With dead ends: 413 [2022-12-13 15:20:16,837 INFO L226 Difference]: Without dead ends: 413 [2022-12-13 15:20:16,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=300, Invalid=963, Unknown=1, NotChecked=68, Total=1332 [2022-12-13 15:20:16,837 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 369 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 26 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 15:20:16,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 822 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 846 Invalid, 3 Unknown, 178 Unchecked, 0.6s Time] [2022-12-13 15:20:16,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-12-13 15:20:16,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 371. [2022-12-13 15:20:16,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 358 states have (on average 1.324022346368715) internal successors, (474), 370 states have internal predecessors, (474), 0 states have call successors, (0), 0 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 15:20:16,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 474 transitions. [2022-12-13 15:20:16,840 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 474 transitions. Word has length 49 [2022-12-13 15:20:16,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:20:16,841 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 474 transitions. [2022-12-13 15:20:16,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 24 states have internal predecessors, (130), 0 states have call successors, (0), 0 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 15:20:16,841 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 474 transitions. [2022-12-13 15:20:16,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-13 15:20:16,841 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:20:16,841 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-12-13 15:20:16,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-13 15:20:17,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:20:17,042 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:20:17,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:20:17,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1021098355, now seen corresponding path program 1 times [2022-12-13 15:20:17,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:20:17,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222370964] [2022-12-13 15:20:17,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:20:17,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:20:17,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:20:17,144 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:20:17,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:20:17,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222370964] [2022-12-13 15:20:17,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222370964] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:20:17,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694006576] [2022-12-13 15:20:17,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:20:17,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:20:17,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:20:17,146 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:20:17,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 15:20:17,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:20:17,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 15:20:17,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:20:17,421 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:20:17,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:20:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:20:17,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694006576] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:20:17,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:20:17,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-12-13 15:20:17,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445178170] [2022-12-13 15:20:17,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:20:17,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:20:17,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:20:17,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:20:17,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:20:17,499 INFO L87 Difference]: Start difference. First operand 371 states and 474 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:20:17,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:20:17,538 INFO L93 Difference]: Finished difference Result 381 states and 476 transitions. [2022-12-13 15:20:17,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 15:20:17,538 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-12-13 15:20:17,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:20:17,540 INFO L225 Difference]: With dead ends: 381 [2022-12-13 15:20:17,540 INFO L226 Difference]: Without dead ends: 381 [2022-12-13 15:20:17,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 96 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:20:17,541 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 96 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:20:17,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 327 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:20:17,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-12-13 15:20:17,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 374. [2022-12-13 15:20:17,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 361 states have (on average 1.3185595567867037) internal successors, (476), 373 states have internal predecessors, (476), 0 states have call successors, (0), 0 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 15:20:17,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 476 transitions. [2022-12-13 15:20:17,547 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 476 transitions. Word has length 50 [2022-12-13 15:20:17,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:20:17,547 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 476 transitions. [2022-12-13 15:20:17,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:20:17,547 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 476 transitions. [2022-12-13 15:20:17,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 15:20:17,548 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:20:17,548 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-12-13 15:20:17,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-13 15:20:17,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:20:17,749 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:20:17,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:20:17,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1589265816, now seen corresponding path program 1 times [2022-12-13 15:20:17,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:20:17,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947397374] [2022-12-13 15:20:17,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:20:17,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:20:17,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:20:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-13 15:20:17,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:20:17,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947397374] [2022-12-13 15:20:17,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947397374] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:20:17,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:20:17,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:20:17,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215819134] [2022-12-13 15:20:17,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:20:17,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:20:17,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:20:17,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:20:17,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:20:17,806 INFO L87 Difference]: Start difference. First operand 374 states and 476 transitions. Second operand has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 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 15:20:17,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:20:17,881 INFO L93 Difference]: Finished difference Result 392 states and 495 transitions. [2022-12-13 15:20:17,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 15:20:17,882 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 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 51 [2022-12-13 15:20:17,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:20:17,883 INFO L225 Difference]: With dead ends: 392 [2022-12-13 15:20:17,884 INFO L226 Difference]: Without dead ends: 392 [2022-12-13 15:20:17,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 15:20:17,884 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 24 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:20:17,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 115 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:20:17,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-12-13 15:20:17,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 373. [2022-12-13 15:20:17,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 361 states have (on average 1.3157894736842106) internal successors, (475), 372 states have internal predecessors, (475), 0 states have call successors, (0), 0 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 15:20:17,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 475 transitions. [2022-12-13 15:20:17,889 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 475 transitions. Word has length 51 [2022-12-13 15:20:17,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:20:17,889 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 475 transitions. [2022-12-13 15:20:17,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 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 15:20:17,889 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 475 transitions. [2022-12-13 15:20:17,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 15:20:17,890 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:20:17,890 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-12-13 15:20:17,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-12-13 15:20:17,890 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:20:17,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:20:17,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1589265815, now seen corresponding path program 1 times [2022-12-13 15:20:17,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:20:17,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054342827] [2022-12-13 15:20:17,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:20:17,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:20:17,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:20:18,450 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:20:18,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:20:18,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054342827] [2022-12-13 15:20:18,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054342827] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:20:18,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640118014] [2022-12-13 15:20:18,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:20:18,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:20:18,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:20:18,451 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:20:18,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 15:20:18,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:20:18,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 15:20:18,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:20:18,664 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 15:20:18,721 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 15:20:18,722 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 15:20:18,824 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 11 treesize of output 7 [2022-12-13 15:20:18,843 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 14 treesize of output 16 [2022-12-13 15:20:18,873 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 15 treesize of output 7 [2022-12-13 15:20:18,930 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:20:18,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:20:18,959 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:20:18,959 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 20 treesize of output 24 [2022-12-13 15:20:19,045 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3994 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_3994) |c_ULTIMATE.start_main_~first~0#1.base|) (+ |c_ULTIMATE.start_main_~first~0#1.offset| 12)) 1))) is different from false [2022-12-13 15:20:19,054 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:20:19,054 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 24 treesize of output 25 [2022-12-13 15:20:19,063 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:20:19,063 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 40 treesize of output 39 [2022-12-13 15:20:19,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2022-12-13 15:20:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:20:19,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640118014] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:20:19,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:20:19,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 25 [2022-12-13 15:20:19,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050484235] [2022-12-13 15:20:19,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:20:19,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 15:20:19,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:20:19,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 15:20:19,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=522, Unknown=1, NotChecked=46, Total=650 [2022-12-13 15:20:19,289 INFO L87 Difference]: Start difference. First operand 373 states and 475 transitions. Second operand has 26 states, 25 states have (on average 4.96) internal successors, (124), 26 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 15:20:20,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:20:20,826 INFO L93 Difference]: Finished difference Result 468 states and 583 transitions. [2022-12-13 15:20:20,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 15:20:20,826 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.96) internal successors, (124), 26 states have internal predecessors, (124), 0 states have call successors, (0), 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 51 [2022-12-13 15:20:20,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:20:20,829 INFO L225 Difference]: With dead ends: 468 [2022-12-13 15:20:20,829 INFO L226 Difference]: Without dead ends: 468 [2022-12-13 15:20:20,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 93 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=436, Invalid=1823, Unknown=1, NotChecked=92, Total=2352 [2022-12-13 15:20:20,830 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 553 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 1362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 15:20:20,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 830 Invalid, 1362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1115 Invalid, 0 Unknown, 219 Unchecked, 0.8s Time] [2022-12-13 15:20:20,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-12-13 15:20:20,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 399. [2022-12-13 15:20:20,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 387 states have (on average 1.3333333333333333) internal successors, (516), 398 states have internal predecessors, (516), 0 states have call successors, (0), 0 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 15:20:20,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 516 transitions. [2022-12-13 15:20:20,837 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 516 transitions. Word has length 51 [2022-12-13 15:20:20,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:20:20,837 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 516 transitions. [2022-12-13 15:20:20,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.96) internal successors, (124), 26 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 15:20:20,838 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 516 transitions. [2022-12-13 15:20:20,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 15:20:20,838 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:20:20,838 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] [2022-12-13 15:20:20,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-13 15:20:21,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-12-13 15:20:21,039 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:20:21,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:20:21,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1446176517, now seen corresponding path program 1 times [2022-12-13 15:20:21,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:20:21,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826844683] [2022-12-13 15:20:21,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:20:21,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:20:21,093 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 15:20:21,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [766212126] [2022-12-13 15:20:21,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:20:21,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:20:21,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:20:21,095 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:20:21,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 15:20:21,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:20:21,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-13 15:20:21,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:20:21,345 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 13 treesize of output 9 [2022-12-13 15:20:21,368 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 11 treesize of output 7 [2022-12-13 15:20:21,387 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 15:20:21,387 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 16 treesize of output 22 [2022-12-13 15:20:21,392 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 11 treesize of output 7 [2022-12-13 15:20:21,401 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 7 treesize of output 5 [2022-12-13 15:20:21,969 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:20:21,970 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 15 treesize of output 15 [2022-12-13 15:20:21,982 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:20:21,983 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 39 treesize of output 35 [2022-12-13 15:20:22,402 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:20:22,402 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 34 treesize of output 32 [2022-12-13 15:20:22,537 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:20:22,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:20:23,386 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 48 treesize of output 44 [2022-12-13 15:20:23,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 75 [2022-12-13 15:20:23,395 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 85 treesize of output 77 [2022-12-13 15:20:23,400 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 134 treesize of output 126 [2022-12-13 15:20:25,469 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:20:25,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 176 treesize of output 117 [2022-12-13 15:20:25,584 INFO L321 Elim1Store]: treesize reduction 66, result has 54.5 percent of original size [2022-12-13 15:20:25,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 210 treesize of output 240 [2022-12-13 15:20:25,606 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:20:25,607 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 91 treesize of output 88 [2022-12-13 15:20:25,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:20:25,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:20:25,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826844683] [2022-12-13 15:20:25,926 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 15:20:25,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766212126] [2022-12-13 15:20:25,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766212126] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:20:25,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:20:25,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2022-12-13 15:20:25,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874669172] [2022-12-13 15:20:25,927 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:20:25,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 15:20:25,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:20:25,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 15:20:25,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=885, Unknown=5, NotChecked=0, Total=992 [2022-12-13 15:20:25,928 INFO L87 Difference]: Start difference. First operand 399 states and 516 transitions. Second operand has 32 states, 32 states have (on average 2.53125) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 15:20:39,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:20:39,539 INFO L93 Difference]: Finished difference Result 596 states and 758 transitions. [2022-12-13 15:20:39,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-13 15:20:39,540 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.53125) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 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 51 [2022-12-13 15:20:39,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:20:39,542 INFO L225 Difference]: With dead ends: 596 [2022-12-13 15:20:39,542 INFO L226 Difference]: Without dead ends: 593 [2022-12-13 15:20:39,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=761, Invalid=4204, Unknown=5, NotChecked=0, Total=4970 [2022-12-13 15:20:39,544 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 526 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 1237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-13 15:20:39,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 505 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1177 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-13 15:20:39,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-12-13 15:20:39,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 439. [2022-12-13 15:20:39,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 427 states have (on average 1.3325526932084308) internal successors, (569), 438 states have internal predecessors, (569), 0 states have call successors, (0), 0 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 15:20:39,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 569 transitions. [2022-12-13 15:20:39,548 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 569 transitions. Word has length 51 [2022-12-13 15:20:39,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:20:39,548 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 569 transitions. [2022-12-13 15:20:39,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.53125) internal successors, (81), 32 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 15:20:39,548 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 569 transitions. [2022-12-13 15:20:39,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 15:20:39,548 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:20:39,549 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] [2022-12-13 15:20:39,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-13 15:20:39,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-12-13 15:20:39,750 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:20:39,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:20:39,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1034980313, now seen corresponding path program 1 times [2022-12-13 15:20:39,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:20:39,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140483715] [2022-12-13 15:20:39,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:20:39,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:20:39,771 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 15:20:39,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [933572370] [2022-12-13 15:20:39,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:20:39,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:20:39,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:20:39,772 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:20:39,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 15:20:39,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:20:39,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 15:20:39,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:20:39,962 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 7 treesize of output 3 [2022-12-13 15:20:40,060 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-13 15:20:40,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-12-13 15:20:40,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:20:40,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:20:40,298 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 8 treesize of output 4 [2022-12-13 15:20:40,302 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 32 treesize of output 28 [2022-12-13 15:20:40,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 15:20:40,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:20:40,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140483715] [2022-12-13 15:20:40,305 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 15:20:40,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933572370] [2022-12-13 15:20:40,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933572370] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:20:40,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:20:40,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2022-12-13 15:20:40,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165621615] [2022-12-13 15:20:40,305 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:20:40,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 15:20:40,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:20:40,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 15:20:40,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-12-13 15:20:40,306 INFO L87 Difference]: Start difference. First operand 439 states and 569 transitions. Second operand has 12 states, 11 states have (on average 5.363636363636363) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 15:20:40,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:20:40,559 INFO L93 Difference]: Finished difference Result 507 states and 653 transitions. [2022-12-13 15:20:40,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:20:40,559 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.363636363636363) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 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 51 [2022-12-13 15:20:40,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:20:40,560 INFO L225 Difference]: With dead ends: 507 [2022-12-13 15:20:40,560 INFO L226 Difference]: Without dead ends: 507 [2022-12-13 15:20:40,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2022-12-13 15:20:40,560 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 103 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 15:20:40,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 174 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 15:20:40,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-12-13 15:20:40,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 405. [2022-12-13 15:20:40,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 394 states have (on average 1.2918781725888324) internal successors, (509), 404 states have internal predecessors, (509), 0 states have call successors, (0), 0 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 15:20:40,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 509 transitions. [2022-12-13 15:20:40,564 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 509 transitions. Word has length 51 [2022-12-13 15:20:40,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:20:40,564 INFO L495 AbstractCegarLoop]: Abstraction has 405 states and 509 transitions. [2022-12-13 15:20:40,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.363636363636363) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 15:20:40,564 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 509 transitions. [2022-12-13 15:20:40,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 15:20:40,565 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:20:40,565 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] [2022-12-13 15:20:40,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-13 15:20:40,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:20:40,766 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:20:40,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:20:40,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1159847037, now seen corresponding path program 1 times [2022-12-13 15:20:40,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:20:40,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469793672] [2022-12-13 15:20:40,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:20:40,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:20:40,817 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 15:20:40,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [81795309] [2022-12-13 15:20:40,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:20:40,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:20:40,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:20:40,819 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:20:40,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 15:20:40,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:20:40,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 15:20:40,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:20:41,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 15:20:41,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:20:41,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 15:20:41,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:20:41,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469793672] [2022-12-13 15:20:41,101 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 15:20:41,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81795309] [2022-12-13 15:20:41,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81795309] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:20:41,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:20:41,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2022-12-13 15:20:41,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337091233] [2022-12-13 15:20:41,101 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:20:41,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 15:20:41,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:20:41,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 15:20:41,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-13 15:20:41,102 INFO L87 Difference]: Start difference. First operand 405 states and 509 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 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 15:20:41,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:20:41,186 INFO L93 Difference]: Finished difference Result 566 states and 693 transitions. [2022-12-13 15:20:41,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 15:20:41,186 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 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 51 [2022-12-13 15:20:41,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:20:41,189 INFO L225 Difference]: With dead ends: 566 [2022-12-13 15:20:41,189 INFO L226 Difference]: Without dead ends: 566 [2022-12-13 15:20:41,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-12-13 15:20:41,190 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 170 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:20:41,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 297 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:20:41,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-12-13 15:20:41,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 477. [2022-12-13 15:20:41,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 466 states have (on average 1.2446351931330473) internal successors, (580), 476 states have internal predecessors, (580), 0 states have call successors, (0), 0 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 15:20:41,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 580 transitions. [2022-12-13 15:20:41,198 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 580 transitions. Word has length 51 [2022-12-13 15:20:41,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:20:41,198 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 580 transitions. [2022-12-13 15:20:41,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 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 15:20:41,198 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 580 transitions. [2022-12-13 15:20:41,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 15:20:41,199 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:20:41,199 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] [2022-12-13 15:20:41,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-13 15:20:41,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-12-13 15:20:41,400 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:20:41,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:20:41,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1580190023, now seen corresponding path program 1 times [2022-12-13 15:20:41,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:20:41,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898674665] [2022-12-13 15:20:41,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:20:41,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:20:41,456 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 15:20:41,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [927526993] [2022-12-13 15:20:41,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:20:41,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:20:41,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:20:41,458 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:20:41,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 15:20:41,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:20:41,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 15:20:41,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:20:41,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 15:20:41,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:20:41,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 15:20:41,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:20:41,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898674665] [2022-12-13 15:20:41,740 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 15:20:41,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927526993] [2022-12-13 15:20:41,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927526993] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:20:41,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:20:41,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-12-13 15:20:41,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646355658] [2022-12-13 15:20:41,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 15:20:41,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 15:20:41,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:20:41,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 15:20:41,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 15:20:41,741 INFO L87 Difference]: Start difference. First operand 477 states and 580 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 15:20:41,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:20:41,781 INFO L93 Difference]: Finished difference Result 570 states and 668 transitions. [2022-12-13 15:20:41,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 15:20:41,781 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 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 51 [2022-12-13 15:20:41,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:20:41,784 INFO L225 Difference]: With dead ends: 570 [2022-12-13 15:20:41,784 INFO L226 Difference]: Without dead ends: 570 [2022-12-13 15:20:41,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-12-13 15:20:41,785 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 82 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:20:41,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 161 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:20:41,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-12-13 15:20:41,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 558. [2022-12-13 15:20:41,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 547 states have (on average 1.1919561243144423) internal successors, (652), 557 states have internal predecessors, (652), 0 states have call successors, (0), 0 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 15:20:41,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 652 transitions. [2022-12-13 15:20:41,792 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 652 transitions. Word has length 51 [2022-12-13 15:20:41,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:20:41,792 INFO L495 AbstractCegarLoop]: Abstraction has 558 states and 652 transitions. [2022-12-13 15:20:41,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 15:20:41,792 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 652 transitions. [2022-12-13 15:20:41,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-13 15:20:41,792 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:20:41,792 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 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] [2022-12-13 15:20:41,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-13 15:20:41,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-12-13 15:20:41,993 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:20:41,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:20:41,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1901638252, now seen corresponding path program 1 times [2022-12-13 15:20:41,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:20:41,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957595400] [2022-12-13 15:20:41,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:20:41,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:20:42,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:20:42,367 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:20:42,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:20:42,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957595400] [2022-12-13 15:20:42,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957595400] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:20:42,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045925028] [2022-12-13 15:20:42,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:20:42,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:20:42,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:20:42,368 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:20:42,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-13 15:20:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:20:42,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-13 15:20:42,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:20:42,572 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 15:20:42,660 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 15:20:42,660 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 15:20:42,776 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 11 treesize of output 7 [2022-12-13 15:20:42,800 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 14 treesize of output 16 [2022-12-13 15:20:42,842 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 15 treesize of output 7 [2022-12-13 15:20:42,880 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:20:42,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:20:42,941 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4682 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_4682) |c_ULTIMATE.start_main_~first~0#1.base|) (+ |c_ULTIMATE.start_main_~first~0#1.offset| 12)) 0)) is different from false [2022-12-13 15:20:42,947 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:20:42,947 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 22 treesize of output 23 [2022-12-13 15:20:42,955 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:20:42,955 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 36 treesize of output 35 [2022-12-13 15:20:42,966 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 7 treesize of output 3 [2022-12-13 15:20:43,140 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:20:43,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045925028] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:20:43,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:20:43,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 19 [2022-12-13 15:20:43,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337331185] [2022-12-13 15:20:43,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:20:43,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 15:20:43,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:20:43,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 15:20:43,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=289, Unknown=1, NotChecked=34, Total=380 [2022-12-13 15:20:43,141 INFO L87 Difference]: Start difference. First operand 558 states and 652 transitions. Second operand has 20 states, 19 states have (on average 5.894736842105263) internal successors, (112), 20 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 15:20:43,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:20:43,775 INFO L93 Difference]: Finished difference Result 638 states and 745 transitions. [2022-12-13 15:20:43,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 15:20:43,776 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.894736842105263) internal successors, (112), 20 states have internal predecessors, (112), 0 states have call successors, (0), 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 54 [2022-12-13 15:20:43,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:20:43,777 INFO L225 Difference]: With dead ends: 638 [2022-12-13 15:20:43,777 INFO L226 Difference]: Without dead ends: 638 [2022-12-13 15:20:43,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 100 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=230, Invalid=765, Unknown=1, NotChecked=60, Total=1056 [2022-12-13 15:20:43,777 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 427 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 15:20:43,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 668 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 665 Invalid, 0 Unknown, 175 Unchecked, 0.4s Time] [2022-12-13 15:20:43,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-12-13 15:20:43,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 568. [2022-12-13 15:20:43,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 557 states have (on average 1.2010771992818672) internal successors, (669), 567 states have internal predecessors, (669), 0 states have call successors, (0), 0 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 15:20:43,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 669 transitions. [2022-12-13 15:20:43,782 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 669 transitions. Word has length 54 [2022-12-13 15:20:43,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:20:43,782 INFO L495 AbstractCegarLoop]: Abstraction has 568 states and 669 transitions. [2022-12-13 15:20:43,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.894736842105263) internal successors, (112), 20 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 15:20:43,782 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 669 transitions. [2022-12-13 15:20:43,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-13 15:20:43,783 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:20:43,783 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 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] [2022-12-13 15:20:43,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-13 15:20:43,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-12-13 15:20:43,984 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-13 15:20:43,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:20:43,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1901638293, now seen corresponding path program 1 times [2022-12-13 15:20:43,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:20:43,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901521126] [2022-12-13 15:20:43,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:20:43,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:20:44,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:20:44,887 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:20:44,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:20:44,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901521126] [2022-12-13 15:20:44,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901521126] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:20:44,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111530268] [2022-12-13 15:20:44,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:20:44,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:20:44,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:20:44,888 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:20:44,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c9f9de2-868a-475d-ab98-81f996fcac28/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-13 15:20:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:20:45,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 92 conjunts are in the unsatisfiable core [2022-12-13 15:20:45,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:20:45,127 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 12 treesize of output 14 [2022-12-13 15:20:45,166 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 13 treesize of output 9 [2022-12-13 15:20:45,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-12-13 15:20:45,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:20:45,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:20:45,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-12-13 15:20:45,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:20:45,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:20:45,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:20:45,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2022-12-13 15:20:45,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:20:45,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:20:45,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:20:45,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2022-12-13 15:20:45,432 INFO L321 Elim1Store]: treesize reduction 26, result has 27.8 percent of original size [2022-12-13 15:20:45,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 29 [2022-12-13 15:20:45,503 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 28 treesize of output 26 [2022-12-13 15:20:45,531 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 28 treesize of output 26 [2022-12-13 15:20:45,566 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 15:20:45,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2022-12-13 15:20:45,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:20:45,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 50 [2022-12-13 15:20:45,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:20:45,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-13 15:20:45,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:20:45,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-12-13 15:20:45,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 15:20:45,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 50 [2022-12-13 15:20:45,980 INFO L321 Elim1Store]: treesize reduction 38, result has 48.6 percent of original size [2022-12-13 15:20:45,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 64 [2022-12-13 15:20:45,990 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 21 treesize of output 20 [2022-12-13 15:20:46,218 INFO L321 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2022-12-13 15:20:46,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 130 treesize of output 117 [2022-12-13 15:20:46,229 INFO L321 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2022-12-13 15:20:46,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 130 treesize of output 141 [2022-12-13 15:20:48,392 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-13 15:20:48,392 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 17 treesize of output 21 [2022-12-13 15:20:48,980 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 15:20:48,980 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 15:20:49,151 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 15:20:49,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 16 [2022-12-13 15:20:49,171 INFO L321 Elim1Store]: treesize reduction 49, result has 14.0 percent of original size [2022-12-13 15:20:49,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 52 treesize of output 31 [2022-12-13 15:20:49,270 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:20:49,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:21:28,446 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 15:21:28,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 1187913753 treesize of output 1119670986