./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_prepend_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_prepend_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e4cb0386e6b22b9d67dd4f4c4c33eb167dcf1836f99794e4424c5e73e6fc14d4 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 11:08:27,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:08:27,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:08:28,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:08:28,012 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:08:28,015 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:08:28,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:08:28,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:08:28,024 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:08:28,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:08:28,031 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:08:28,034 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:08:28,035 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:08:28,038 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:08:28,040 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:08:28,044 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:08:28,046 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:08:28,047 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:08:28,049 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:08:28,055 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:08:28,057 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:08:28,060 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:08:28,061 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:08:28,063 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:08:28,071 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:08:28,071 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:08:28,072 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:08:28,074 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:08:28,075 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:08:28,076 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:08:28,076 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:08:28,077 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:08:28,079 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:08:28,081 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:08:28,082 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:08:28,082 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:08:28,083 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:08:28,084 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:08:28,084 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:08:28,086 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:08:28,086 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:08:28,087 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-20 11:08:28,128 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:08:28,128 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:08:28,129 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:08:28,129 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:08:28,130 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:08:28,131 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:08:28,132 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:08:28,132 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:08:28,132 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:08:28,132 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:08:28,133 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:08:28,134 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 11:08:28,134 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:08:28,134 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:08:28,135 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:08:28,135 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 11:08:28,135 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 11:08:28,135 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 11:08:28,135 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:08:28,136 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 11:08:28,136 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:08:28,136 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:08:28,136 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:08:28,137 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:08:28,137 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:08:28,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:08:28,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:08:28,138 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:08:28,138 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:08:28,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:08:28,139 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4cb0386e6b22b9d67dd4f4c4c33eb167dcf1836f99794e4424c5e73e6fc14d4 [2022-11-20 11:08:28,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:08:28,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:08:28,505 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:08:28,507 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:08:28,508 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:08:28,509 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/list-simple/sll2n_prepend_equal.i [2022-11-20 11:08:31,572 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:08:31,852 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:08:31,867 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/sv-benchmarks/c/list-simple/sll2n_prepend_equal.i [2022-11-20 11:08:31,882 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/data/0ce676d75/b6f667aab3544c51b9ce8692c1d31cbd/FLAG3a15482dc [2022-11-20 11:08:31,899 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/data/0ce676d75/b6f667aab3544c51b9ce8692c1d31cbd [2022-11-20 11:08:31,901 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:08:31,903 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:08:31,904 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:08:31,905 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:08:31,909 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:08:31,910 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:08:31" (1/1) ... [2022-11-20 11:08:31,911 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ee4379f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:08:31, skipping insertion in model container [2022-11-20 11:08:31,912 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:08:31" (1/1) ... [2022-11-20 11:08:31,921 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:08:31,979 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:08:32,385 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/sv-benchmarks/c/list-simple/sll2n_prepend_equal.i[24076,24089] [2022-11-20 11:08:32,389 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:08:32,400 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:08:32,464 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/sv-benchmarks/c/list-simple/sll2n_prepend_equal.i[24076,24089] [2022-11-20 11:08:32,469 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:08:32,499 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:08:32,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:08:32 WrapperNode [2022-11-20 11:08:32,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:08:32,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:08:32,502 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:08:32,502 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:08:32,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:08:32" (1/1) ... [2022-11-20 11:08:32,523 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:08:32" (1/1) ... [2022-11-20 11:08:32,562 INFO L138 Inliner]: procedures = 127, calls = 30, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 106 [2022-11-20 11:08:32,562 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:08:32,563 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:08:32,563 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:08:32,563 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:08:32,573 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:08:32" (1/1) ... [2022-11-20 11:08:32,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:08:32" (1/1) ... [2022-11-20 11:08:32,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:08:32" (1/1) ... [2022-11-20 11:08:32,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:08:32" (1/1) ... [2022-11-20 11:08:32,602 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:08:32" (1/1) ... [2022-11-20 11:08:32,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:08:32" (1/1) ... [2022-11-20 11:08:32,614 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:08:32" (1/1) ... [2022-11-20 11:08:32,625 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:08:32" (1/1) ... [2022-11-20 11:08:32,627 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:08:32,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:08:32,629 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:08:32,629 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:08:32,630 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:08:32" (1/1) ... [2022-11-20 11:08:32,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:08:32,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:08:32,672 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:08:32,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:08:32,720 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 11:08:32,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 11:08:32,721 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-11-20 11:08:32,721 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-11-20 11:08:32,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 11:08:32,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:08:32,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 11:08:32,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 11:08:32,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 11:08:32,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 11:08:32,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-20 11:08:32,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:08:32,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:08:32,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:08:32,874 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:08:32,876 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:08:33,218 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:08:33,224 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:08:33,224 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 11:08:33,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:08:33 BoogieIcfgContainer [2022-11-20 11:08:33,227 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:08:33,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:08:33,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:08:33,240 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:08:33,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:08:31" (1/3) ... [2022-11-20 11:08:33,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a2f2703 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:08:33, skipping insertion in model container [2022-11-20 11:08:33,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:08:32" (2/3) ... [2022-11-20 11:08:33,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a2f2703 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:08:33, skipping insertion in model container [2022-11-20 11:08:33,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:08:33" (3/3) ... [2022-11-20 11:08:33,243 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_prepend_equal.i [2022-11-20 11:08:33,263 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:08:33,264 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2022-11-20 11:08:33,329 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:08:33,336 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@e4cdfa1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:08:33,337 INFO L358 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2022-11-20 11:08:33,342 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 69 states have internal predecessors, (78), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:08:33,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 11:08:33,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:08:33,349 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:08:33,351 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-20 11:08:33,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:08:33,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1813073593, now seen corresponding path program 1 times [2022-11-20 11:08:33,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:08:33,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642983208] [2022-11-20 11:08:33,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:08:33,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:08:33,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:33,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:08:33,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:08:33,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642983208] [2022-11-20 11:08:33,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642983208] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:08:33,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:08:33,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:08:33,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285658651] [2022-11-20 11:08:33,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:08:33,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:08:33,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:08:33,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:08:33,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:08:33,743 INFO L87 Difference]: Start difference. First operand has 73 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 69 states have internal predecessors, (78), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:08:33,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:08:33,862 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2022-11-20 11:08:33,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:08:33,865 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 11:08:33,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:08:33,874 INFO L225 Difference]: With dead ends: 71 [2022-11-20 11:08:33,874 INFO L226 Difference]: Without dead ends: 68 [2022-11-20 11:08:33,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:08:33,880 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 8 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:08:33,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 108 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:08:33,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-20 11:08:33,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-11-20 11:08:33,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 40 states have (on average 1.7) internal successors, (68), 64 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:08:33,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2022-11-20 11:08:33,923 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 7 [2022-11-20 11:08:33,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:08:33,923 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2022-11-20 11:08:33,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:08:33,924 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2022-11-20 11:08:33,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 11:08:33,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:08:33,925 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:08:33,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:08:33,925 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-20 11:08:33,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:08:33,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1813073594, now seen corresponding path program 1 times [2022-11-20 11:08:33,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:08:33,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469689035] [2022-11-20 11:08:33,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:08:33,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:08:33,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:34,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:08:34,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:08:34,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469689035] [2022-11-20 11:08:34,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469689035] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:08:34,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:08:34,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 11:08:34,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416398101] [2022-11-20 11:08:34,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:08:34,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 11:08:34,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:08:34,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 11:08:34,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:08:34,137 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:08:34,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:08:34,223 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2022-11-20 11:08:34,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 11:08:34,223 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 11:08:34,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:08:34,227 INFO L225 Difference]: With dead ends: 66 [2022-11-20 11:08:34,228 INFO L226 Difference]: Without dead ends: 66 [2022-11-20 11:08:34,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 11:08:34,233 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 4 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:08:34,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 108 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:08:34,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-20 11:08:34,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-11-20 11:08:34,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 40 states have (on average 1.65) internal successors, (66), 62 states have internal predecessors, (66), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:08:34,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2022-11-20 11:08:34,246 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 7 [2022-11-20 11:08:34,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:08:34,249 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2022-11-20 11:08:34,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:08:34,250 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2022-11-20 11:08:34,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:08:34,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:08:34,254 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:08:34,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:08:34,255 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-20 11:08:34,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:08:34,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1431584192, now seen corresponding path program 1 times [2022-11-20 11:08:34,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:08:34,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826134521] [2022-11-20 11:08:34,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:08:34,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:08:34,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:34,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:08:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:34,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:08:34,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:08:34,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826134521] [2022-11-20 11:08:34,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826134521] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:08:34,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:08:34,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:08:34,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484976882] [2022-11-20 11:08:34,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:08:34,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:08:34,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:08:34,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:08:34,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:08:34,608 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 11:08:34,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:08:34,813 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2022-11-20 11:08:34,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:08:34,814 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-11-20 11:08:34,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:08:34,816 INFO L225 Difference]: With dead ends: 70 [2022-11-20 11:08:34,816 INFO L226 Difference]: Without dead ends: 70 [2022-11-20 11:08:34,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:08:34,818 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 11 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:08:34,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 249 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:08:34,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-20 11:08:34,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2022-11-20 11:08:34,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 40 states have (on average 1.625) internal successors, (65), 61 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:08:34,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2022-11-20 11:08:34,834 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 13 [2022-11-20 11:08:34,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:08:34,834 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2022-11-20 11:08:34,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 11:08:34,835 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2022-11-20 11:08:34,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 11:08:34,835 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:08:34,836 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:08:34,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:08:34,836 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-20 11:08:34,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:08:34,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1431584193, now seen corresponding path program 1 times [2022-11-20 11:08:34,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:08:34,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133782244] [2022-11-20 11:08:34,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:08:34,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:08:34,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:34,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:08:34,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:35,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:08:35,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:08:35,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133782244] [2022-11-20 11:08:35,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133782244] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:08:35,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:08:35,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:08:35,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740387886] [2022-11-20 11:08:35,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:08:35,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:08:35,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:08:35,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:08:35,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:08:35,066 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 11:08:35,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:08:35,281 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2022-11-20 11:08:35,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:08:35,282 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-11-20 11:08:35,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:08:35,283 INFO L225 Difference]: With dead ends: 69 [2022-11-20 11:08:35,283 INFO L226 Difference]: Without dead ends: 69 [2022-11-20 11:08:35,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:08:35,285 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 9 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:08:35,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 265 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:08:35,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-20 11:08:35,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2022-11-20 11:08:35,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.6) internal successors, (64), 60 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:08:35,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2022-11-20 11:08:35,292 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 13 [2022-11-20 11:08:35,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:08:35,293 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2022-11-20 11:08:35,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 11:08:35,293 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2022-11-20 11:08:35,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 11:08:35,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:08:35,294 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:08:35,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:08:35,295 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-20 11:08:35,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:08:35,295 INFO L85 PathProgramCache]: Analyzing trace with hash 869381824, now seen corresponding path program 1 times [2022-11-20 11:08:35,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:08:35,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660033572] [2022-11-20 11:08:35,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:08:35,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:08:35,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:35,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-20 11:08:35,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:35,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:08:35,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:08:35,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660033572] [2022-11-20 11:08:35,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660033572] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:08:35,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:08:35,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:08:35,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707530502] [2022-11-20 11:08:35,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:08:35,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:08:35,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:08:35,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:08:35,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:08:35,391 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 11:08:35,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:08:35,485 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2022-11-20 11:08:35,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:08:35,486 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-11-20 11:08:35,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:08:35,487 INFO L225 Difference]: With dead ends: 70 [2022-11-20 11:08:35,487 INFO L226 Difference]: Without dead ends: 70 [2022-11-20 11:08:35,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:08:35,488 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 4 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:08:35,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 159 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:08:35,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-20 11:08:35,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2022-11-20 11:08:35,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 61 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:08:35,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2022-11-20 11:08:35,495 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 15 [2022-11-20 11:08:35,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:08:35,495 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2022-11-20 11:08:35,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 11:08:35,495 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2022-11-20 11:08:35,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 11:08:35,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:08:35,496 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:08:35,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:08:35,497 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-20 11:08:35,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:08:35,498 INFO L85 PathProgramCache]: Analyzing trace with hash -206453950, now seen corresponding path program 1 times [2022-11-20 11:08:35,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:08:35,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428960385] [2022-11-20 11:08:35,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:08:35,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:08:35,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:35,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:08:35,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:35,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-20 11:08:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:35,654 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 11:08:35,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:08:35,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428960385] [2022-11-20 11:08:35,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428960385] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:08:35,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331210636] [2022-11-20 11:08:35,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:08:35,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:08:35,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:08:35,659 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:08:35,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:08:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:35,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 11:08:35,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:08:35,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:08:35,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:08:35,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 11:08:35,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331210636] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:08:35,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:08:35,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2022-11-20 11:08:35,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126804868] [2022-11-20 11:08:35,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:08:35,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 11:08:35,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:08:35,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 11:08:35,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:08:35,954 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-20 11:08:36,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:08:36,031 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2022-11-20 11:08:36,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:08:36,032 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2022-11-20 11:08:36,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:08:36,033 INFO L225 Difference]: With dead ends: 71 [2022-11-20 11:08:36,034 INFO L226 Difference]: Without dead ends: 71 [2022-11-20 11:08:36,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-20 11:08:36,039 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 8 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:08:36,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 158 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:08:36,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-20 11:08:36,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-11-20 11:08:36,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 66 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:08:36,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2022-11-20 11:08:36,059 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 28 [2022-11-20 11:08:36,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:08:36,059 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2022-11-20 11:08:36,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-20 11:08:36,059 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2022-11-20 11:08:36,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-20 11:08:36,060 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:08:36,061 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:08:36,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 11:08:36,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-20 11:08:36,266 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-20 11:08:36,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:08:36,267 INFO L85 PathProgramCache]: Analyzing trace with hash 400923136, now seen corresponding path program 2 times [2022-11-20 11:08:36,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:08:36,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128982540] [2022-11-20 11:08:36,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:08:36,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:08:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:36,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:08:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:36,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 11:08:36,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:36,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 11:08:36,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:36,854 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-20 11:08:36,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:08:36,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128982540] [2022-11-20 11:08:36,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128982540] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:08:36,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:08:36,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:08:36,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299580495] [2022-11-20 11:08:36,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:08:36,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:08:36,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:08:36,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:08:36,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:08:36,856 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:08:37,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:08:37,025 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2022-11-20 11:08:37,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:08:37,025 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-11-20 11:08:37,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:08:37,026 INFO L225 Difference]: With dead ends: 79 [2022-11-20 11:08:37,026 INFO L226 Difference]: Without dead ends: 79 [2022-11-20 11:08:37,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:08:37,027 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 87 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:08:37,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 147 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:08:37,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-20 11:08:37,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2022-11-20 11:08:37,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.434782608695652) internal successors, (66), 62 states have internal predecessors, (66), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:08:37,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2022-11-20 11:08:37,032 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 41 [2022-11-20 11:08:37,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:08:37,032 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2022-11-20 11:08:37,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:08:37,033 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2022-11-20 11:08:37,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-20 11:08:37,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:08:37,034 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:08:37,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 11:08:37,034 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-20 11:08:37,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:08:37,035 INFO L85 PathProgramCache]: Analyzing trace with hash 400923137, now seen corresponding path program 1 times [2022-11-20 11:08:37,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:08:37,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78535528] [2022-11-20 11:08:37,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:08:37,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:08:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:37,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:08:37,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:37,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 11:08:37,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:37,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 11:08:38,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:38,128 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:08:38,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:08:38,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78535528] [2022-11-20 11:08:38,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78535528] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:08:38,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423323072] [2022-11-20 11:08:38,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:08:38,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:08:38,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:08:38,131 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:08:38,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:08:38,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:38,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-20 11:08:38,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:08:38,341 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 [2022-11-20 11:08:38,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 11:08:38,438 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_452 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_452))))) is different from true [2022-11-20 11:08:38,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:08:38,527 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 [2022-11-20 11:08:38,572 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 [2022-11-20 11:08:38,583 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_453 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_453) |c_#length|)))) is different from true [2022-11-20 11:08:38,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:08:38,638 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 [2022-11-20 11:08:38,719 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 [2022-11-20 11:08:38,732 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_454 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_454) |c_#length|)))) is different from true [2022-11-20 11:08:38,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:08:38,782 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 [2022-11-20 11:08:38,792 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 18 not checked. [2022-11-20 11:08:38,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:08:38,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423323072] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:08:38,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:08:38,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2022-11-20 11:08:38,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680468630] [2022-11-20 11:08:38,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:08:38,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:08:38,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:08:38,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:08:38,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=225, Unknown=3, NotChecked=96, Total=380 [2022-11-20 11:08:38,920 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 18 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 4 states have call successors, (4), 2 states have call predecessors, (4), 6 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 11:08:39,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:08:39,297 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2022-11-20 11:08:39,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 11:08:39,298 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 4 states have call successors, (4), 2 states have call predecessors, (4), 6 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 41 [2022-11-20 11:08:39,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:08:39,298 INFO L225 Difference]: With dead ends: 65 [2022-11-20 11:08:39,299 INFO L226 Difference]: Without dead ends: 65 [2022-11-20 11:08:39,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=343, Unknown=3, NotChecked=120, Total=552 [2022-11-20 11:08:39,300 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 47 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:08:39,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 232 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 145 Invalid, 0 Unknown, 168 Unchecked, 0.2s Time] [2022-11-20 11:08:39,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-20 11:08:39,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-11-20 11:08:39,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 46 states have (on average 1.391304347826087) internal successors, (64), 60 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:08:39,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2022-11-20 11:08:39,304 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 41 [2022-11-20 11:08:39,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:08:39,304 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2022-11-20 11:08:39,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 4 states have call successors, (4), 2 states have call predecessors, (4), 6 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 11:08:39,305 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2022-11-20 11:08:39,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-20 11:08:39,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:08:39,306 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:08:39,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 11:08:39,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:08:39,506 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-20 11:08:39,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:08:39,507 INFO L85 PathProgramCache]: Analyzing trace with hash -456284671, now seen corresponding path program 1 times [2022-11-20 11:08:39,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:08:39,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090977035] [2022-11-20 11:08:39,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:08:39,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:08:39,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:39,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:08:39,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:39,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 11:08:39,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:39,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 11:08:39,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:39,781 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 11:08:39,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:08:39,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090977035] [2022-11-20 11:08:39,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090977035] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:08:39,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:08:39,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:08:39,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564480486] [2022-11-20 11:08:39,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:08:39,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:08:39,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:08:39,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:08:39,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:08:39,783 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 11:08:39,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:08:39,912 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2022-11-20 11:08:39,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:08:39,913 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2022-11-20 11:08:39,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:08:39,914 INFO L225 Difference]: With dead ends: 64 [2022-11-20 11:08:39,914 INFO L226 Difference]: Without dead ends: 64 [2022-11-20 11:08:39,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:08:39,915 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 41 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:08:39,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 181 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:08:39,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-20 11:08:39,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-11-20 11:08:39,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 59 states have internal predecessors, (63), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:08:39,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2022-11-20 11:08:39,919 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 42 [2022-11-20 11:08:39,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:08:39,919 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2022-11-20 11:08:39,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 11:08:39,919 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2022-11-20 11:08:39,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-20 11:08:39,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:08:39,920 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:08:39,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 11:08:39,921 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-20 11:08:39,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:08:39,921 INFO L85 PathProgramCache]: Analyzing trace with hash -456284672, now seen corresponding path program 1 times [2022-11-20 11:08:39,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:08:39,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670214235] [2022-11-20 11:08:39,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:08:39,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:08:39,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:40,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:08:40,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:40,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 11:08:40,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:40,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 11:08:40,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:40,081 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 11:08:40,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:08:40,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670214235] [2022-11-20 11:08:40,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670214235] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:08:40,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:08:40,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 11:08:40,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155560806] [2022-11-20 11:08:40,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:08:40,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:08:40,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:08:40,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:08:40,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 11:08:40,084 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 11:08:40,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:08:40,213 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2022-11-20 11:08:40,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:08:40,214 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2022-11-20 11:08:40,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:08:40,215 INFO L225 Difference]: With dead ends: 75 [2022-11-20 11:08:40,215 INFO L226 Difference]: Without dead ends: 75 [2022-11-20 11:08:40,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:08:40,216 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 38 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:08:40,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 182 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:08:40,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-20 11:08:40,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 63. [2022-11-20 11:08:40,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 58 states have internal predecessors, (62), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:08:40,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2022-11-20 11:08:40,219 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 42 [2022-11-20 11:08:40,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:08:40,220 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2022-11-20 11:08:40,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-20 11:08:40,220 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2022-11-20 11:08:40,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 11:08:40,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:08:40,221 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:08:40,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 11:08:40,221 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-20 11:08:40,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:08:40,222 INFO L85 PathProgramCache]: Analyzing trace with hash -645131485, now seen corresponding path program 1 times [2022-11-20 11:08:40,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:08:40,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580469837] [2022-11-20 11:08:40,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:08:40,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:08:40,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:40,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:08:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:40,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 11:08:40,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:40,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 11:08:40,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:40,506 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-20 11:08:40,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:08:40,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580469837] [2022-11-20 11:08:40,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580469837] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:08:40,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:08:40,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 11:08:40,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895370310] [2022-11-20 11:08:40,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:08:40,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 11:08:40,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:08:40,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 11:08:40,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-20 11:08:40,509 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 8 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:08:40,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:08:40,604 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2022-11-20 11:08:40,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:08:40,605 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2022-11-20 11:08:40,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:08:40,607 INFO L225 Difference]: With dead ends: 61 [2022-11-20 11:08:40,607 INFO L226 Difference]: Without dead ends: 61 [2022-11-20 11:08:40,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-20 11:08:40,608 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 105 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:08:40,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 111 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:08:40,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-20 11:08:40,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-11-20 11:08:40,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 56 states have internal predecessors, (60), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:08:40,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2022-11-20 11:08:40,613 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 46 [2022-11-20 11:08:40,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:08:40,613 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2022-11-20 11:08:40,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:08:40,614 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2022-11-20 11:08:40,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-20 11:08:40,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:08:40,620 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:08:40,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 11:08:40,620 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-20 11:08:40,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:08:40,621 INFO L85 PathProgramCache]: Analyzing trace with hash 866562379, now seen corresponding path program 1 times [2022-11-20 11:08:40,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:08:40,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175113704] [2022-11-20 11:08:40,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:08:40,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:08:40,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:40,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:08:40,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:40,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 11:08:40,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:40,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 11:08:40,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:40,975 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 11:08:40,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:08:40,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175113704] [2022-11-20 11:08:40,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175113704] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:08:40,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:08:40,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 11:08:40,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201641737] [2022-11-20 11:08:40,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:08:40,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:08:40,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:08:40,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:08:40,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:08:40,979 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 11 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:08:41,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:08:41,212 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2022-11-20 11:08:41,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:08:41,213 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2022-11-20 11:08:41,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:08:41,214 INFO L225 Difference]: With dead ends: 92 [2022-11-20 11:08:41,214 INFO L226 Difference]: Without dead ends: 92 [2022-11-20 11:08:41,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:08:41,215 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 142 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:08:41,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 224 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:08:41,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-20 11:08:41,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 62. [2022-11-20 11:08:41,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 48 states have (on average 1.3125) internal successors, (63), 57 states have internal predecessors, (63), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:08:41,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2022-11-20 11:08:41,218 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 49 [2022-11-20 11:08:41,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:08:41,218 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2022-11-20 11:08:41,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:08:41,219 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2022-11-20 11:08:41,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-20 11:08:41,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:08:41,219 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:08:41,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 11:08:41,220 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-20 11:08:41,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:08:41,220 INFO L85 PathProgramCache]: Analyzing trace with hash 866562380, now seen corresponding path program 1 times [2022-11-20 11:08:41,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:08:41,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504922416] [2022-11-20 11:08:41,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:08:41,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:08:41,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:41,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:08:41,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:41,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 11:08:41,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:41,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 11:08:41,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:41,772 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 11:08:41,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:08:41,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504922416] [2022-11-20 11:08:41,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504922416] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:08:41,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:08:41,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 11:08:41,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495062986] [2022-11-20 11:08:41,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:08:41,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:08:41,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:08:41,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:08:41,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:08:41,775 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 11 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:08:42,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:08:42,030 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2022-11-20 11:08:42,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:08:42,030 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2022-11-20 11:08:42,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:08:42,031 INFO L225 Difference]: With dead ends: 84 [2022-11-20 11:08:42,031 INFO L226 Difference]: Without dead ends: 84 [2022-11-20 11:08:42,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:08:42,032 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 138 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:08:42,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 233 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:08:42,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-20 11:08:42,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 64. [2022-11-20 11:08:42,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.28) internal successors, (64), 59 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:08:42,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2022-11-20 11:08:42,035 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 49 [2022-11-20 11:08:42,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:08:42,036 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2022-11-20 11:08:42,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:08:42,036 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2022-11-20 11:08:42,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-20 11:08:42,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:08:42,037 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-11-20 11:08:42,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 11:08:42,037 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-20 11:08:42,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:08:42,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1093628647, now seen corresponding path program 1 times [2022-11-20 11:08:42,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:08:42,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180347814] [2022-11-20 11:08:42,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:08:42,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:08:42,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:42,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:08:42,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:42,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 11:08:42,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:42,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 11:08:42,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:42,411 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 11:08:42,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:08:42,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180347814] [2022-11-20 11:08:42,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180347814] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:08:42,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:08:42,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 11:08:42,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99181531] [2022-11-20 11:08:42,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:08:42,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:08:42,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:08:42,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:08:42,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:08:42,413 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 11 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:08:42,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:08:42,595 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2022-11-20 11:08:42,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:08:42,595 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2022-11-20 11:08:42,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:08:42,596 INFO L225 Difference]: With dead ends: 67 [2022-11-20 11:08:42,596 INFO L226 Difference]: Without dead ends: 67 [2022-11-20 11:08:42,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:08:42,597 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 86 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:08:42,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 291 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:08:42,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-20 11:08:42,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-11-20 11:08:42,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.26) internal successors, (63), 59 states have internal predecessors, (63), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:08:42,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2022-11-20 11:08:42,600 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 50 [2022-11-20 11:08:42,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:08:42,600 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2022-11-20 11:08:42,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:08:42,600 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2022-11-20 11:08:42,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-20 11:08:42,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:08:42,601 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:08:42,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 11:08:42,601 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-20 11:08:42,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:08:42,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1290611022, now seen corresponding path program 1 times [2022-11-20 11:08:42,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:08:42,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390530429] [2022-11-20 11:08:42,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:08:42,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:08:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:43,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:08:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:43,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 11:08:43,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:43,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 11:08:43,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:43,460 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 11:08:43,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:08:43,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390530429] [2022-11-20 11:08:43,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390530429] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:08:43,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:08:43,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-20 11:08:43,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778452609] [2022-11-20 11:08:43,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:08:43,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:08:43,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:08:43,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:08:43,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:08:43,463 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:08:43,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:08:43,907 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2022-11-20 11:08:43,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 11:08:43,908 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2022-11-20 11:08:43,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:08:43,909 INFO L225 Difference]: With dead ends: 65 [2022-11-20 11:08:43,909 INFO L226 Difference]: Without dead ends: 65 [2022-11-20 11:08:43,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-11-20 11:08:43,910 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 116 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:08:43,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 279 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:08:43,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-20 11:08:43,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-11-20 11:08:43,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 60 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:08:43,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2022-11-20 11:08:43,915 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 53 [2022-11-20 11:08:43,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:08:43,915 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2022-11-20 11:08:43,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:08:43,916 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2022-11-20 11:08:43,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-20 11:08:43,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:08:43,916 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-11-20 11:08:43,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 11:08:43,917 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-20 11:08:43,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:08:43,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1354235562, now seen corresponding path program 1 times [2022-11-20 11:08:43,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:08:43,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737416094] [2022-11-20 11:08:43,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:08:43,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:08:43,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:45,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:08:45,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:45,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 11:08:45,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:45,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 11:08:45,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:45,499 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 11:08:45,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:08:45,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737416094] [2022-11-20 11:08:45,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737416094] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:08:45,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295522826] [2022-11-20 11:08:45,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:08:45,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:08:45,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:08:45,503 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:08:45,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:08:45,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:08:45,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-20 11:08:45,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:08:46,058 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 9 treesize of output 5 [2022-11-20 11:08:46,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:08:46,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-20 11:08:46,432 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-20 11:08:46,432 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 16 treesize of output 18 [2022-11-20 11:08:46,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:08:46,697 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2022-11-20 11:08:46,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:08:46,822 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 0 case distinctions, treesize of input 32 treesize of output 23 [2022-11-20 11:08:46,834 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 [2022-11-20 11:08:46,922 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 [2022-11-20 11:08:47,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:08:47,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:08:47,121 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:08:47,121 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 45 treesize of output 25 [2022-11-20 11:08:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 11:08:47,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:08:47,451 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 114 treesize of output 106 [2022-11-20 11:08:53,708 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:09:02,138 WARN L233 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:09:08,552 WARN L233 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:09:10,608 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (+ |c_ULTIMATE.start_sll_prepend_#t~ret7#1.offset| 4))) (let ((.cse2 (let ((.cse4 (let ((.cse5 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|) .cse3 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset|))))) (store .cse5 |c_ULTIMATE.start_sll_prepend_~head#1.base| (store (select .cse5 |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|))))) (select .cse4 (select (select .cse4 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (.cse0 (= |c_ULTIMATE.start_sll_prepend_~head#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|)) (.cse1 (= |c_ULTIMATE.start_sll_prepend_~head#1.offset| |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (and .cse0 .cse1 (= (select |c_#valid| (select .cse2 .cse3)) 1)) (and (or (and .cse0 .cse1) (forall ((v_arrayElimCell_17 Int)) (or (= (select |c_#valid| (select .cse2 (+ 4 v_arrayElimCell_17))) 1) (not (<= 0 v_arrayElimCell_17))))) (or (not .cse0) (not (<= 0 |c_ULTIMATE.start_sll_prepend_#t~ret7#1.offset|)) (not .cse1)))))) is different from false [2022-11-20 11:09:10,853 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_arrayElimCell_17 Int) (v_ArrVal_1395 (Array Int Int)) (|v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_13| Int)) (or (not (< |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_13| |c_#StackHeapBarrier|)) (not (<= 0 v_arrayElimCell_17)) (= (select (store |c_#valid| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_13| 1) (select (let ((.cse9 (let ((.cse10 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_13| (store v_ArrVal_1395 4 (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_13| v_ArrVal_1395) |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset|))))) (store .cse10 |c_ULTIMATE.start_sll_prepend_~head#1.base| (store (select .cse10 |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_13|))))) (select .cse9 (select (select .cse9 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (+ 4 v_arrayElimCell_17))) 1)))) (.cse2 (= |c_ULTIMATE.start_sll_prepend_~head#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|)) (.cse1 (= |c_ULTIMATE.start_sll_prepend_~head#1.offset| |c_ULTIMATE.start_main_~#s~0#1.offset|))) (and (or .cse0 .cse1) (or .cse2 .cse0) (or (and .cse2 .cse1) (forall ((v_arrayElimCell_17 Int) (v_ArrVal_1395 (Array Int Int)) (|v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_13| Int)) (let ((.cse3 (store |c_#valid| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_13| 1)) (.cse4 (let ((.cse5 (let ((.cse6 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_13| (store v_ArrVal_1395 4 (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_13| v_ArrVal_1395) |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset|))))) (store .cse6 |c_ULTIMATE.start_sll_prepend_~head#1.base| (store (select .cse6 |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_13|))))) (select .cse5 (select (select .cse5 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))) (or (not (< |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_13| |c_#StackHeapBarrier|)) (= (select .cse3 (select .cse4 4)) 1) (not (<= 0 v_arrayElimCell_17)) (= (select .cse3 (select .cse4 (+ 4 v_arrayElimCell_17))) 1))))) (or (not .cse2) (not .cse1) (forall ((v_ArrVal_1395 (Array Int Int)) (|v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_13| Int)) (or (not (< |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_13| |c_#StackHeapBarrier|)) (= (select (store |c_#valid| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_13| 1) (select (let ((.cse7 (let ((.cse8 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_13| (store v_ArrVal_1395 4 (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_13| v_ArrVal_1395) |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset|))))) (store .cse8 |c_ULTIMATE.start_sll_prepend_~head#1.base| (store (select .cse8 |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset| |v_ULTIMATE.start_sll_prepend_#t~ret7#1.base_13|))))) (select .cse7 (select (select .cse7 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) 4)) 1)))))) is different from false [2022-11-20 11:09:10,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295522826] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:09:10,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:09:10,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 40 [2022-11-20 11:09:10,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914863553] [2022-11-20 11:09:10,860 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:09:10,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-20 11:09:10,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:09:10,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-20 11:09:10,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2202, Unknown=4, NotChecked=190, Total=2550 [2022-11-20 11:09:10,863 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 41 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 36 states have internal predecessors, (74), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-20 11:09:12,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:12,135 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2022-11-20 11:09:12,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 11:09:12,139 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 36 states have internal predecessors, (74), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 54 [2022-11-20 11:09:12,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:12,140 INFO L225 Difference]: With dead ends: 86 [2022-11-20 11:09:12,141 INFO L226 Difference]: Without dead ends: 86 [2022-11-20 11:09:12,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=249, Invalid=3293, Unknown=6, NotChecked=234, Total=3782 [2022-11-20 11:09:12,143 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 54 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:12,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 594 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 639 Invalid, 0 Unknown, 130 Unchecked, 0.6s Time] [2022-11-20 11:09:12,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-20 11:09:12,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 67. [2022-11-20 11:09:12,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 62 states have internal predecessors, (68), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:09:12,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2022-11-20 11:09:12,147 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 54 [2022-11-20 11:09:12,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:12,147 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2022-11-20 11:09:12,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 36 states have internal predecessors, (74), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-20 11:09:12,148 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2022-11-20 11:09:12,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-20 11:09:12,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:12,149 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-11-20 11:09:12,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:09:12,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:09:12,355 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-20 11:09:12,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:12,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1354235561, now seen corresponding path program 1 times [2022-11-20 11:09:12,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:09:12,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414525840] [2022-11-20 11:09:12,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:12,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:09:12,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:14,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:09:14,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:14,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 11:09:14,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:14,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 11:09:14,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:15,097 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:09:15,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:09:15,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414525840] [2022-11-20 11:09:15,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414525840] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:09:15,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41301429] [2022-11-20 11:09:15,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:15,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:09:15,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:09:15,099 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:09:15,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:09:15,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:15,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 112 conjunts are in the unsatisfiable core [2022-11-20 11:09:15,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:16,006 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 [2022-11-20 11:09:16,012 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 [2022-11-20 11:09:16,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:16,477 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 [2022-11-20 11:09:16,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:16,496 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 25 [2022-11-20 11:09:16,507 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-20 11:09:16,508 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 [2022-11-20 11:09:16,516 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 16 treesize of output 18 [2022-11-20 11:09:16,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:16,838 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-20 11:09:16,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:16,870 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 26 [2022-11-20 11:09:17,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:17,027 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 0 case distinctions, treesize of input 40 treesize of output 27 [2022-11-20 11:09:17,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:17,052 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 0 case distinctions, treesize of input 34 treesize of output 25 [2022-11-20 11:09:17,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:09:17,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:17,420 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:09:17,421 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 76 treesize of output 40 [2022-11-20 11:09:17,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:17,436 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 11:09:17,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 16 [2022-11-20 11:09:17,579 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:09:17,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:09:21,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41301429] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:09:21,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:09:21,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 46 [2022-11-20 11:09:21,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637537154] [2022-11-20 11:09:21,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:09:21,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-20 11:09:21,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:09:21,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-20 11:09:21,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=3224, Unknown=1, NotChecked=0, Total=3422 [2022-11-20 11:09:21,316 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 47 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 41 states have internal predecessors, (85), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 11:09:22,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:22,997 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2022-11-20 11:09:22,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 11:09:22,998 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 41 states have internal predecessors, (85), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 54 [2022-11-20 11:09:22,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:22,999 INFO L225 Difference]: With dead ends: 91 [2022-11-20 11:09:22,999 INFO L226 Difference]: Without dead ends: 91 [2022-11-20 11:09:23,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=310, Invalid=4657, Unknown=3, NotChecked=0, Total=4970 [2022-11-20 11:09:23,001 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 80 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:23,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 665 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 667 Invalid, 0 Unknown, 102 Unchecked, 0.6s Time] [2022-11-20 11:09:23,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-20 11:09:23,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 69. [2022-11-20 11:09:23,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 55 states have (on average 1.2545454545454546) internal successors, (69), 64 states have internal predecessors, (69), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:09:23,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2022-11-20 11:09:23,004 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 54 [2022-11-20 11:09:23,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:23,005 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2022-11-20 11:09:23,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 41 states have internal predecessors, (85), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 11:09:23,005 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2022-11-20 11:09:23,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-20 11:09:23,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:23,006 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:09:23,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-20 11:09:23,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 11:09:23,213 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-20 11:09:23,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:23,213 INFO L85 PathProgramCache]: Analyzing trace with hash 968369212, now seen corresponding path program 1 times [2022-11-20 11:09:23,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:09:23,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971697534] [2022-11-20 11:09:23,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:23,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:09:23,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:24,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:09:24,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:24,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 11:09:24,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:24,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 11:09:24,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:24,627 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:09:24,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:09:24,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971697534] [2022-11-20 11:09:24,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971697534] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:09:24,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906672037] [2022-11-20 11:09:24,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:24,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:09:24,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:09:24,631 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:09:24,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:09:24,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:24,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-20 11:09:24,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:25,281 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 [2022-11-20 11:09:25,322 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 [2022-11-20 11:09:25,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:25,614 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 15 treesize of output 17 [2022-11-20 11:09:25,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:25,856 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2022-11-20 11:09:25,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:25,963 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 0 case distinctions, treesize of input 31 treesize of output 22 [2022-11-20 11:09:26,285 INFO L321 Elim1Store]: treesize reduction 15, result has 34.8 percent of original size [2022-11-20 11:09:26,285 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 55 treesize of output 36 [2022-11-20 11:09:26,293 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 13 treesize of output 9 [2022-11-20 11:09:26,427 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:09:26,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:09:27,399 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 138 treesize of output 98 [2022-11-20 11:09:27,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906672037] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:09:27,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:09:27,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 44 [2022-11-20 11:09:27,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600693676] [2022-11-20 11:09:27,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:09:27,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-20 11:09:27,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:09:27,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-20 11:09:27,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2483, Unknown=20, NotChecked=0, Total=2652 [2022-11-20 11:09:27,841 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand has 44 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 38 states have internal predecessors, (81), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 11:09:28,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:28,937 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2022-11-20 11:09:28,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 11:09:28,938 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 38 states have internal predecessors, (81), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 55 [2022-11-20 11:09:28,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:28,938 INFO L225 Difference]: With dead ends: 72 [2022-11-20 11:09:28,938 INFO L226 Difference]: Without dead ends: 72 [2022-11-20 11:09:28,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=251, Invalid=3884, Unknown=25, NotChecked=0, Total=4160 [2022-11-20 11:09:28,941 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 38 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:28,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 827 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 520 Invalid, 0 Unknown, 101 Unchecked, 0.4s Time] [2022-11-20 11:09:28,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-20 11:09:28,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2022-11-20 11:09:28,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 64 states have internal predecessors, (68), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:09:28,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2022-11-20 11:09:28,945 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 55 [2022-11-20 11:09:28,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:28,945 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2022-11-20 11:09:28,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 38 states have internal predecessors, (81), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 11:09:28,946 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2022-11-20 11:09:28,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-20 11:09:28,947 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:28,947 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-11-20 11:09:28,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:09:29,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 11:09:29,153 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-20 11:09:29,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:29,154 INFO L85 PathProgramCache]: Analyzing trace with hash -567858883, now seen corresponding path program 1 times [2022-11-20 11:09:29,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:09:29,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912667175] [2022-11-20 11:09:29,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:29,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:09:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:30,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:09:30,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:30,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 11:09:30,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:31,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 11:09:31,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:32,085 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:09:32,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:09:32,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912667175] [2022-11-20 11:09:32,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912667175] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:09:32,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299864688] [2022-11-20 11:09:32,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:32,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:09:32,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:09:32,091 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:09:32,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:09:32,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:32,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 135 conjunts are in the unsatisfiable core [2022-11-20 11:09:32,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:32,565 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 [2022-11-20 11:09:32,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:32,865 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 [2022-11-20 11:09:33,298 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 30 treesize of output 18 [2022-11-20 11:09:33,304 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 [2022-11-20 11:09:33,309 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 [2022-11-20 11:09:33,317 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 [2022-11-20 11:09:33,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:33,738 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 38 treesize of output 29 [2022-11-20 11:09:33,757 INFO L321 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2022-11-20 11:09:33,757 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 20 treesize of output 23 [2022-11-20 11:09:33,762 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 [2022-11-20 11:09:33,778 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-20 11:09:33,779 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 [2022-11-20 11:09:33,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:33,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2022-11-20 11:09:34,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:34,201 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 33 [2022-11-20 11:09:34,214 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 [2022-11-20 11:09:34,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:34,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-20 11:09:34,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:34,423 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 0 case distinctions, treesize of input 51 treesize of output 34 [2022-11-20 11:09:34,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:34,442 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 0 case distinctions, treesize of input 34 treesize of output 25 [2022-11-20 11:09:34,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:34,453 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 22 treesize of output 24 [2022-11-20 11:09:34,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:09:34,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:34,942 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:09:34,943 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 91 treesize of output 47 [2022-11-20 11:09:34,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:34,957 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 11:09:34,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 16 [2022-11-20 11:09:35,309 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 [2022-11-20 11:09:35,374 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:09:35,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:09:38,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299864688] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:09:38,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:09:38,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 51 [2022-11-20 11:09:38,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798111524] [2022-11-20 11:09:38,057 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:09:38,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-20 11:09:38,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:09:38,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-20 11:09:38,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=3601, Unknown=0, NotChecked=0, Total=3782 [2022-11-20 11:09:38,059 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 51 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 45 states have internal predecessors, (91), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 11:09:41,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:09:41,034 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2022-11-20 11:09:41,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-20 11:09:41,035 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 45 states have internal predecessors, (91), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 58 [2022-11-20 11:09:41,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:09:41,036 INFO L225 Difference]: With dead ends: 70 [2022-11-20 11:09:41,036 INFO L226 Difference]: Without dead ends: 70 [2022-11-20 11:09:41,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=372, Invalid=6108, Unknown=0, NotChecked=0, Total=6480 [2022-11-20 11:09:41,038 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 55 mSDsluCounter, 888 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:09:41,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 925 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1165 Invalid, 0 Unknown, 41 Unchecked, 1.1s Time] [2022-11-20 11:09:41,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-20 11:09:41,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-11-20 11:09:41,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 56 states have (on average 1.2321428571428572) internal successors, (69), 65 states have internal predecessors, (69), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:09:41,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2022-11-20 11:09:41,042 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 58 [2022-11-20 11:09:41,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:09:41,042 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2022-11-20 11:09:41,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 49 states have (on average 1.8571428571428572) internal successors, (91), 45 states have internal predecessors, (91), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-20 11:09:41,043 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2022-11-20 11:09:41,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-20 11:09:41,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:09:41,044 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 11:09:41,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:09:41,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:09:41,250 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-20 11:09:41,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:09:41,251 INFO L85 PathProgramCache]: Analyzing trace with hash -423755733, now seen corresponding path program 2 times [2022-11-20 11:09:41,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:09:41,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531883292] [2022-11-20 11:09:41,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:09:41,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:09:41,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:43,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:09:43,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:43,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 11:09:43,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:43,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 11:09:43,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:09:44,242 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:09:44,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:09:44,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531883292] [2022-11-20 11:09:44,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531883292] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:09:44,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609151548] [2022-11-20 11:09:44,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:09:44,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:09:44,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:09:44,244 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:09:44,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:09:44,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:09:44,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:09:44,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 128 conjunts are in the unsatisfiable core [2022-11-20 11:09:44,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:09:44,545 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 [2022-11-20 11:09:44,609 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 [2022-11-20 11:09:44,655 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2179 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_~temp~0#1.base| v_ArrVal_2179))) is different from true [2022-11-20 11:09:44,665 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2179 Int)) (= |c_#valid| (store |c_old(#valid)| |c_node_create_#res#1.base| v_ArrVal_2179))) is different from true [2022-11-20 11:09:44,688 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 11:09:44,689 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 [2022-11-20 11:09:44,996 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 11:09:44,997 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 7 [2022-11-20 11:09:45,004 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 [2022-11-20 11:09:45,254 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-20 11:09:45,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2022-11-20 11:09:45,466 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 13 treesize of output 9 [2022-11-20 11:09:45,992 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:09:45,993 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 27 [2022-11-20 11:09:46,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-20 11:09:46,019 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 11:09:46,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 10 [2022-11-20 11:09:46,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:46,649 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-20 11:09:46,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 56 [2022-11-20 11:09:46,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:46,697 INFO L321 Elim1Store]: treesize reduction 88, result has 32.8 percent of original size [2022-11-20 11:09:46,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 65 [2022-11-20 11:09:46,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 16 treesize of output 18 [2022-11-20 11:09:47,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:47,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:09:47,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:47,257 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:09:47,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 58 [2022-11-20 11:09:47,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:09:47,491 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 11:09:47,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 55 [2022-11-20 11:09:47,516 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 [2022-11-20 11:09:47,685 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 [2022-11-20 11:09:48,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:09:48,950 INFO L321 Elim1Store]: treesize reduction 54, result has 22.9 percent of original size [2022-11-20 11:09:48,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 154 treesize of output 72 [2022-11-20 11:09:48,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-20 11:09:49,984 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 12 not checked. [2022-11-20 11:09:49,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:09:51,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-20 11:10:25,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609151548] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:10:25,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:10:25,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36] total 70 [2022-11-20 11:10:25,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965773848] [2022-11-20 11:10:25,891 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:10:25,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-20 11:10:25,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:10:25,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-20 11:10:25,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=6517, Unknown=11, NotChecked=326, Total=7140 [2022-11-20 11:10:25,894 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand has 71 states, 68 states have (on average 1.5441176470588236) internal successors, (105), 62 states have internal predecessors, (105), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 11:10:30,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:10:30,739 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2022-11-20 11:10:30,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-20 11:10:30,740 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 68 states have (on average 1.5441176470588236) internal successors, (105), 62 states have internal predecessors, (105), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 59 [2022-11-20 11:10:30,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:10:30,741 INFO L225 Difference]: With dead ends: 73 [2022-11-20 11:10:30,741 INFO L226 Difference]: Without dead ends: 73 [2022-11-20 11:10:30,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2941 ImplicationChecksByTransitivity, 44.0s TimeCoverageRelationStatistics Valid=541, Invalid=11010, Unknown=13, NotChecked=426, Total=11990 [2022-11-20 11:10:30,745 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 52 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 377 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:10:30,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 1024 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 997 Invalid, 0 Unknown, 377 Unchecked, 0.9s Time] [2022-11-20 11:10:30,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-20 11:10:30,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2022-11-20 11:10:30,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 67 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:10:30,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2022-11-20 11:10:30,749 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 59 [2022-11-20 11:10:30,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:10:30,749 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2022-11-20 11:10:30,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 68 states have (on average 1.5441176470588236) internal successors, (105), 62 states have internal predecessors, (105), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 11:10:30,750 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2022-11-20 11:10:30,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-20 11:10:30,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:10:30,751 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 11:10:30,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 11:10:30,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:10:30,968 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-20 11:10:30,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:10:30,968 INFO L85 PathProgramCache]: Analyzing trace with hash -423755732, now seen corresponding path program 2 times [2022-11-20 11:10:30,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:10:30,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069729388] [2022-11-20 11:10:30,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:10:30,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:10:31,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:33,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:10:33,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:33,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 11:10:33,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:33,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 11:10:33,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:10:34,570 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:10:34,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:10:34,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069729388] [2022-11-20 11:10:34,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069729388] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:10:34,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713253110] [2022-11-20 11:10:34,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:10:34,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:10:34,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:10:34,575 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:10:34,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:10:34,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:10:34,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:10:34,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 140 conjunts are in the unsatisfiable core [2022-11-20 11:10:34,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:10:35,518 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 11:10:35,519 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 [2022-11-20 11:10:35,528 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 [2022-11-20 11:10:35,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 11:10:35,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 11:10:36,425 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:10:36,426 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 41 [2022-11-20 11:10:36,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:10:36,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-11-20 11:10:36,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 11:10:37,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:10:37,194 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-20 11:10:37,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 76 [2022-11-20 11:10:37,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:10:37,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:10:37,220 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-20 11:10:37,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 57 [2022-11-20 11:10:37,259 INFO L321 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2022-11-20 11:10:37,260 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 1 case distinctions, treesize of input 24 treesize of output 38 [2022-11-20 11:10:37,280 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 15 treesize of output 11 [2022-11-20 11:10:37,345 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2022-11-20 11:10:37,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2022-11-20 11:10:38,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:10:38,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:10:38,030 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:10:38,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 62 [2022-11-20 11:10:38,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:10:38,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:10:38,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:10:38,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 52 [2022-11-20 11:10:38,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:10:38,304 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 11:10:38,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 96 treesize of output 61 [2022-11-20 11:10:38,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:10:38,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:10:38,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:10:38,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 68 [2022-11-20 11:10:38,335 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 19 treesize of output 15 [2022-11-20 11:10:40,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:10:40,114 INFO L321 Elim1Store]: treesize reduction 63, result has 20.3 percent of original size [2022-11-20 11:10:40,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 197 treesize of output 103 [2022-11-20 11:10:40,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:10:40,132 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:10:40,133 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2022-11-20 11:10:41,090 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 12 refuted. 6 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:10:41,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:10:56,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713253110] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:10:56,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:10:56,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 32] total 67 [2022-11-20 11:10:56,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064500966] [2022-11-20 11:10:56,119 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:10:56,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-20 11:10:56,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:10:56,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-20 11:10:56,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=6730, Unknown=13, NotChecked=0, Total=6972 [2022-11-20 11:10:56,122 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 68 states, 65 states have (on average 1.6153846153846154) internal successors, (105), 60 states have internal predecessors, (105), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 11:11:04,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:04,222 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2022-11-20 11:11:04,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 11:11:04,222 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 65 states have (on average 1.6153846153846154) internal successors, (105), 60 states have internal predecessors, (105), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 59 [2022-11-20 11:11:04,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:04,223 INFO L225 Difference]: With dead ends: 73 [2022-11-20 11:11:04,223 INFO L226 Difference]: Without dead ends: 73 [2022-11-20 11:11:04,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2021 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=516, Invalid=12353, Unknown=13, NotChecked=0, Total=12882 [2022-11-20 11:11:04,225 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 76 mSDsluCounter, 1302 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 1340 SdHoareTripleChecker+Invalid, 1625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 424 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:04,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 1340 Invalid, 1625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1190 Invalid, 0 Unknown, 424 Unchecked, 1.1s Time] [2022-11-20 11:11:04,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-20 11:11:04,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2022-11-20 11:11:04,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 67 states have internal predecessors, (72), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:11:04,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2022-11-20 11:11:04,229 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 59 [2022-11-20 11:11:04,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:04,229 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2022-11-20 11:11:04,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 65 states have (on average 1.6153846153846154) internal successors, (105), 60 states have internal predecessors, (105), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 11:11:04,230 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2022-11-20 11:11:04,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-20 11:11:04,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:04,231 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-11-20 11:11:04,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 11:11:04,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-20 11:11:04,437 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-20 11:11:04,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:04,438 INFO L85 PathProgramCache]: Analyzing trace with hash -251527161, now seen corresponding path program 2 times [2022-11-20 11:11:04,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:11:04,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905319561] [2022-11-20 11:11:04,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:04,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:11:04,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:06,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:11:06,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:06,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 11:11:06,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:06,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 11:11:06,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:07,183 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:11:07,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:11:07,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905319561] [2022-11-20 11:11:07,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905319561] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:07,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042226713] [2022-11-20 11:11:07,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:11:07,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:07,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:11:07,185 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:11:07,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 11:11:07,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:11:07,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:11:07,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 130 conjunts are in the unsatisfiable core [2022-11-20 11:11:07,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:08,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 11:11:08,442 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:11:08,442 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 18 [2022-11-20 11:11:08,452 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 [2022-11-20 11:11:08,457 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 [2022-11-20 11:11:08,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:08,840 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-20 11:11:08,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 36 [2022-11-20 11:11:08,853 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-20 11:11:08,854 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 [2022-11-20 11:11:08,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:08,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2022-11-20 11:11:09,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:09,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:11:09,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:09,256 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:11:09,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 40 [2022-11-20 11:11:09,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:09,285 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-20 11:11:09,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:09,449 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 11:11:09,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 41 [2022-11-20 11:11:09,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:09,459 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 0 case distinctions, treesize of input 30 treesize of output 25 [2022-11-20 11:11:09,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:09,935 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 11:11:09,936 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 16 [2022-11-20 11:11:10,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:11:10,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:10,482 INFO L321 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2022-11-20 11:11:10,482 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 31 [2022-11-20 11:11:10,610 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:11:10,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:11:12,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042226713] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:12,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:11:12,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 62 [2022-11-20 11:11:12,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88194317] [2022-11-20 11:11:12,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:11:12,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-20 11:11:12,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:11:12,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-20 11:11:12,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=5012, Unknown=0, NotChecked=0, Total=5256 [2022-11-20 11:11:12,400 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand has 62 states, 60 states have (on average 1.5666666666666667) internal successors, (94), 54 states have internal predecessors, (94), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 11:11:15,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:15,193 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2022-11-20 11:11:15,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 11:11:15,194 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 60 states have (on average 1.5666666666666667) internal successors, (94), 54 states have internal predecessors, (94), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 60 [2022-11-20 11:11:15,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:15,195 INFO L225 Difference]: With dead ends: 80 [2022-11-20 11:11:15,195 INFO L226 Difference]: Without dead ends: 80 [2022-11-20 11:11:15,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2148 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=513, Invalid=7859, Unknown=0, NotChecked=0, Total=8372 [2022-11-20 11:11:15,196 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 131 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1103 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:15,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 1103 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 984 Invalid, 0 Unknown, 195 Unchecked, 0.9s Time] [2022-11-20 11:11:15,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-20 11:11:15,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2022-11-20 11:11:15,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 67 states have internal predecessors, (71), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:11:15,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2022-11-20 11:11:15,200 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 60 [2022-11-20 11:11:15,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:15,200 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2022-11-20 11:11:15,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 60 states have (on average 1.5666666666666667) internal successors, (94), 54 states have internal predecessors, (94), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 11:11:15,201 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2022-11-20 11:11:15,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-20 11:11:15,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:15,202 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 11:11:15,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 11:11:15,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:15,402 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-20 11:11:15,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:15,403 INFO L85 PathProgramCache]: Analyzing trace with hash 792634509, now seen corresponding path program 1 times [2022-11-20 11:11:15,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:11:15,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344684618] [2022-11-20 11:11:15,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:15,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:11:15,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:17,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:11:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:17,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 11:11:17,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:17,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 11:11:17,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:17,726 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:11:17,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:11:17,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344684618] [2022-11-20 11:11:17,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344684618] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:17,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069834077] [2022-11-20 11:11:17,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:17,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:17,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:11:17,729 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:11:17,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 11:11:17,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:18,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 140 conjunts are in the unsatisfiable core [2022-11-20 11:11:18,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:18,448 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 [2022-11-20 11:11:18,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-11-20 11:11:18,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:18,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 11:11:18,814 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 [2022-11-20 11:11:19,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:19,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:19,330 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 44 treesize of output 39 [2022-11-20 11:11:19,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:19,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:19,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:19,358 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-20 11:11:19,358 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 33 treesize of output 39 [2022-11-20 11:11:19,378 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-20 11:11:19,379 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 [2022-11-20 11:11:19,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:19,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:19,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:11:19,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-11-20 11:11:19,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:19,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:11:19,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 36 [2022-11-20 11:11:19,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:19,994 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 0 case distinctions, treesize of input 51 treesize of output 34 [2022-11-20 11:11:20,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:20,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:20,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-20 11:11:20,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:11:20,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:20,471 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:11:20,471 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 91 treesize of output 47 [2022-11-20 11:11:21,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:21,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:21,287 INFO L321 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2022-11-20 11:11:21,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 27 [2022-11-20 11:11:21,420 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:11:21,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:11:21,491 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 8 treesize of output 6 [2022-11-20 11:11:24,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069834077] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:24,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:11:24,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 37] total 65 [2022-11-20 11:11:24,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025703334] [2022-11-20 11:11:24,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:11:24,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-20 11:11:24,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:11:24,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-20 11:11:24,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=6607, Unknown=0, NotChecked=0, Total=6972 [2022-11-20 11:11:24,643 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand has 66 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 58 states have internal predecessors, (96), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 11:11:26,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:26,903 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2022-11-20 11:11:26,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-20 11:11:26,904 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 58 states have internal predecessors, (96), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 61 [2022-11-20 11:11:26,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:26,905 INFO L225 Difference]: With dead ends: 76 [2022-11-20 11:11:26,905 INFO L226 Difference]: Without dead ends: 76 [2022-11-20 11:11:26,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3489 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=583, Invalid=9719, Unknown=0, NotChecked=0, Total=10302 [2022-11-20 11:11:26,907 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 67 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:26,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 917 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 570 Invalid, 0 Unknown, 62 Unchecked, 0.5s Time] [2022-11-20 11:11:26,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-20 11:11:26,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2022-11-20 11:11:26,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 69 states have internal predecessors, (73), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-20 11:11:26,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2022-11-20 11:11:26,910 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 61 [2022-11-20 11:11:26,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:26,910 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2022-11-20 11:11:26,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 58 states have internal predecessors, (96), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 11:11:26,910 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2022-11-20 11:11:26,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-20 11:11:26,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:26,911 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 11:11:26,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 11:11:27,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-20 11:11:27,119 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-20 11:11:27,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:27,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1512551826, now seen corresponding path program 2 times [2022-11-20 11:11:27,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:11:27,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838641773] [2022-11-20 11:11:27,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:27,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:11:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:30,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:11:30,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:30,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 11:11:30,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:30,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 11:11:30,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:31,591 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-20 11:11:31,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:11:31,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838641773] [2022-11-20 11:11:31,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838641773] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:31,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517796173] [2022-11-20 11:11:31,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:11:31,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:31,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:11:31,593 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:11:31,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 11:11:31,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:11:31,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:11:31,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 191 conjunts are in the unsatisfiable core [2022-11-20 11:11:31,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:11:31,946 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 [2022-11-20 11:11:32,041 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 [2022-11-20 11:11:32,220 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 [2022-11-20 11:11:32,465 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 11:11:32,466 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 [2022-11-20 11:11:32,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:32,698 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 [2022-11-20 11:11:32,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 11:11:33,569 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 11:11:33,569 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 14 treesize of output 20 [2022-11-20 11:11:33,586 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 5 treesize of output 3 [2022-11-20 11:11:33,621 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-20 11:11:33,621 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 4 case distinctions, treesize of input 22 treesize of output 33 [2022-11-20 11:11:33,953 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 11:11:33,960 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 20 treesize of output 22 [2022-11-20 11:11:33,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 11:11:34,767 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:11:34,768 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 40 [2022-11-20 11:11:34,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-20 11:11:34,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2022-11-20 11:11:35,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:35,390 INFO L321 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2022-11-20 11:11:35,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 68 [2022-11-20 11:11:35,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:35,412 INFO L321 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2022-11-20 11:11:35,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 33 [2022-11-20 11:11:35,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:35,450 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2022-11-20 11:11:35,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 33 [2022-11-20 11:11:35,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2022-11-20 11:11:36,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:36,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2022-11-20 11:11:36,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:36,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:11:36,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:36,181 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 11:11:36,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 61 [2022-11-20 11:11:36,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-20 11:11:36,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:36,500 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 11:11:36,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 97 treesize of output 58 [2022-11-20 11:11:36,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:36,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:36,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-20 11:11:36,538 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 26 treesize of output 28 [2022-11-20 11:11:38,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:11:38,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:38,338 INFO L321 Elim1Store]: treesize reduction 63, result has 14.9 percent of original size [2022-11-20 11:11:38,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 190 treesize of output 87 [2022-11-20 11:11:38,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:11:38,361 INFO L321 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2022-11-20 11:11:38,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 27 [2022-11-20 11:11:38,857 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 [2022-11-20 11:11:38,960 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 35 refuted. 6 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:11:38,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:11:51,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517796173] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:11:51,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:11:51,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 41] total 76 [2022-11-20 11:11:51,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369968751] [2022-11-20 11:11:51,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:11:51,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-20 11:11:51,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:11:51,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-20 11:11:51,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=8098, Unknown=11, NotChecked=0, Total=8372 [2022-11-20 11:11:51,032 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand has 76 states, 74 states have (on average 1.472972972972973) internal successors, (109), 66 states have internal predecessors, (109), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 11:11:54,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:11:54,944 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2022-11-20 11:11:54,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-20 11:11:54,945 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 74 states have (on average 1.472972972972973) internal successors, (109), 66 states have internal predecessors, (109), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 63 [2022-11-20 11:11:54,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:11:54,946 INFO L225 Difference]: With dead ends: 107 [2022-11-20 11:11:54,946 INFO L226 Difference]: Without dead ends: 107 [2022-11-20 11:11:54,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2184 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=405, Invalid=11353, Unknown=14, NotChecked=0, Total=11772 [2022-11-20 11:11:54,948 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 45 mSDsluCounter, 1319 mSDsCounter, 0 mSdLazyCounter, 1383 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1359 SdHoareTripleChecker+Invalid, 1652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 244 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:11:54,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 1359 Invalid, 1652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1383 Invalid, 0 Unknown, 244 Unchecked, 1.2s Time] [2022-11-20 11:11:54,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-20 11:11:54,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2022-11-20 11:11:54,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 90 states have (on average 1.1555555555555554) internal successors, (104), 99 states have internal predecessors, (104), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-20 11:11:54,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 114 transitions. [2022-11-20 11:11:54,953 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 114 transitions. Word has length 63 [2022-11-20 11:11:54,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:11:54,953 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 114 transitions. [2022-11-20 11:11:54,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 74 states have (on average 1.472972972972973) internal successors, (109), 66 states have internal predecessors, (109), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 11:11:54,954 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 114 transitions. [2022-11-20 11:11:54,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-20 11:11:54,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:11:54,955 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:11:54,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-20 11:11:55,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:11:55,167 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-20 11:11:55,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:11:55,167 INFO L85 PathProgramCache]: Analyzing trace with hash -355533194, now seen corresponding path program 3 times [2022-11-20 11:11:55,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:11:55,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194903527] [2022-11-20 11:11:55,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:11:55,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:11:55,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:59,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:11:59,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:11:59,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 11:11:59,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:00,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 11:12:00,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:00,579 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:12:00,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:00,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194903527] [2022-11-20 11:12:00,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194903527] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:12:00,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781990068] [2022-11-20 11:12:00,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:12:00,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:00,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:12:00,580 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:12:00,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 11:12:01,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 11:12:01,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:12:01,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 194 conjunts are in the unsatisfiable core [2022-11-20 11:12:01,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:01,436 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 [2022-11-20 11:12:01,539 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 [2022-11-20 11:12:01,818 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 11:12:01,818 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 [2022-11-20 11:12:02,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 11:12:02,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 11:12:02,394 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 7 treesize of output 3 [2022-11-20 11:12:02,399 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 7 treesize of output 3 [2022-11-20 11:12:02,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 11:12:03,086 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 11:12:03,086 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 16 treesize of output 22 [2022-11-20 11:12:03,095 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 [2022-11-20 11:12:03,114 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 11:12:03,114 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 16 treesize of output 22 [2022-11-20 11:12:03,122 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 [2022-11-20 11:12:03,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:03,146 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-20 11:12:03,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2022-11-20 11:12:03,487 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 [2022-11-20 11:12:03,495 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 27 treesize of output 26 [2022-11-20 11:12:04,315 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 11:12:04,316 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 45 [2022-11-20 11:12:04,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:04,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-20 11:12:04,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:04,330 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 0 case distinctions, treesize of input 22 treesize of output 10 [2022-11-20 11:12:04,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:04,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:04,871 INFO L321 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2022-11-20 11:12:04,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 33 [2022-11-20 11:12:04,970 WARN L837 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_sll_prepend_~head#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0) (= |c_ULTIMATE.start_main_~#s~0#1.offset| 0) (or (exists ((|v_old(#memory_$Pointer$.base)_AFTER_CALL_35| (Array Int (Array Int Int)))) (let ((.cse0 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_35| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (let ((.cse2 (@diff |v_old(#memory_$Pointer$.base)_AFTER_CALL_35| |c_#memory_$Pointer$.base|)) (.cse1 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_35| .cse0) 4))) (and (= (select (select |c_#memory_$Pointer$.offset| .cse0) 4) 0) (not (= .cse1 |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|)) (not (= .cse0 .cse1)) (= .cse2 |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|) (not (= .cse0 |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|)) (= |c_#memory_$Pointer$.base| (store |v_old(#memory_$Pointer$.base)_AFTER_CALL_35| .cse2 (select |c_#memory_$Pointer$.base| .cse2))) (<= (+ .cse0 2) |c_ULTIMATE.start_main_~#s~0#1.base|) (= 0 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_35| .cse1) 4)) (= (select (select |c_#memory_$Pointer$.offset| .cse1) 4) 0) (not (= .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|)))))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (let ((.cse4 (select (select |c_#memory_$Pointer$.base| .cse3) 4))) (and (<= (+ 2 .cse3) |c_ULTIMATE.start_main_~#s~0#1.base|) (not (= |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base| .cse3)) (= (select (select |c_#memory_$Pointer$.offset| .cse3) 4) 0) (not (= .cse4 .cse3)) (not (= .cse4 |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|)) (= (select (select |c_#memory_$Pointer$.base| .cse4) 4) 0) (= (select (select |c_#memory_$Pointer$.offset| .cse4) 4) 0) (not (= .cse4 |c_ULTIMATE.start_main_~#s~0#1.base|)))))) (= |c_ULTIMATE.start_sll_prepend_#t~ret7#1.offset| 0) (<= (+ 2 |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|) |c_ULTIMATE.start_main_~#s~0#1.base|) (= |c_ULTIMATE.start_sll_prepend_~head#1.offset| |c_ULTIMATE.start_main_~#s~0#1.offset|)) is different from false [2022-11-20 11:12:04,975 WARN L859 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_sll_prepend_~head#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0) (= |c_ULTIMATE.start_main_~#s~0#1.offset| 0) (or (exists ((|v_old(#memory_$Pointer$.base)_AFTER_CALL_35| (Array Int (Array Int Int)))) (let ((.cse0 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_35| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (let ((.cse2 (@diff |v_old(#memory_$Pointer$.base)_AFTER_CALL_35| |c_#memory_$Pointer$.base|)) (.cse1 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_35| .cse0) 4))) (and (= (select (select |c_#memory_$Pointer$.offset| .cse0) 4) 0) (not (= .cse1 |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|)) (not (= .cse0 .cse1)) (= .cse2 |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|) (not (= .cse0 |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|)) (= |c_#memory_$Pointer$.base| (store |v_old(#memory_$Pointer$.base)_AFTER_CALL_35| .cse2 (select |c_#memory_$Pointer$.base| .cse2))) (<= (+ .cse0 2) |c_ULTIMATE.start_main_~#s~0#1.base|) (= 0 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_35| .cse1) 4)) (= (select (select |c_#memory_$Pointer$.offset| .cse1) 4) 0) (not (= .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|)))))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (let ((.cse4 (select (select |c_#memory_$Pointer$.base| .cse3) 4))) (and (<= (+ 2 .cse3) |c_ULTIMATE.start_main_~#s~0#1.base|) (not (= |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base| .cse3)) (= (select (select |c_#memory_$Pointer$.offset| .cse3) 4) 0) (not (= .cse4 .cse3)) (not (= .cse4 |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|)) (= (select (select |c_#memory_$Pointer$.base| .cse4) 4) 0) (= (select (select |c_#memory_$Pointer$.offset| .cse4) 4) 0) (not (= .cse4 |c_ULTIMATE.start_main_~#s~0#1.base|)))))) (= |c_ULTIMATE.start_sll_prepend_#t~ret7#1.offset| 0) (<= (+ 2 |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|) |c_ULTIMATE.start_main_~#s~0#1.base|) (= |c_ULTIMATE.start_sll_prepend_~head#1.offset| |c_ULTIMATE.start_main_~#s~0#1.offset|)) is different from true [2022-11-20 11:12:05,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:05,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:05,485 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 52 [2022-11-20 11:12:05,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:05,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:12:05,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:05,510 INFO L321 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2022-11-20 11:12:05,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 116 treesize of output 75 [2022-11-20 11:12:05,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:05,819 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-20 11:12:05,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 113 treesize of output 72 [2022-11-20 11:12:05,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:05,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:05,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:05,850 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 68 treesize of output 65 [2022-11-20 11:12:09,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 11:12:09,321 INFO L321 Elim1Store]: treesize reduction 168, result has 7.7 percent of original size [2022-11-20 11:12:09,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 246 treesize of output 113 [2022-11-20 11:12:09,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:09,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:09,352 INFO L321 Elim1Store]: treesize reduction 15, result has 40.0 percent of original size [2022-11-20 11:12:09,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 36 [2022-11-20 11:12:09,820 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 40 refuted. 4 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:12:09,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:12:38,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781990068] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:12:38,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:12:38,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41] total 77 [2022-11-20 11:12:38,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091806661] [2022-11-20 11:12:38,090 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 11:12:38,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-20 11:12:38,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:38,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-20 11:12:38,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=8292, Unknown=8, NotChecked=182, Total=8742 [2022-11-20 11:12:38,093 INFO L87 Difference]: Start difference. First operand 106 states and 114 transitions. Second operand has 77 states, 75 states have (on average 1.44) internal successors, (108), 68 states have internal predecessors, (108), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 11:12:41,067 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset|))) (and (= |c_ULTIMATE.start_sll_prepend_~head#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0) (= |c_ULTIMATE.start_main_~#s~0#1.offset| 0) (not (= .cse0 |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|)) (or (exists ((|v_old(#memory_$Pointer$.base)_AFTER_CALL_35| (Array Int (Array Int Int)))) (let ((.cse1 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_35| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (let ((.cse3 (@diff |v_old(#memory_$Pointer$.base)_AFTER_CALL_35| |c_#memory_$Pointer$.base|)) (.cse2 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_35| .cse1) 4))) (and (= (select (select |c_#memory_$Pointer$.offset| .cse1) 4) 0) (not (= .cse2 |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|)) (not (= .cse1 .cse2)) (= .cse3 |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|) (not (= .cse1 |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|)) (= |c_#memory_$Pointer$.base| (store |v_old(#memory_$Pointer$.base)_AFTER_CALL_35| .cse3 (select |c_#memory_$Pointer$.base| .cse3))) (<= (+ .cse1 2) |c_ULTIMATE.start_main_~#s~0#1.base|) (= 0 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_35| .cse2) 4)) (= (select (select |c_#memory_$Pointer$.offset| .cse2) 4) 0) (not (= .cse2 |c_ULTIMATE.start_main_~#s~0#1.base|)))))) (let ((.cse4 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (let ((.cse5 (select (select |c_#memory_$Pointer$.base| .cse4) 4))) (and (<= (+ 2 .cse4) |c_ULTIMATE.start_main_~#s~0#1.base|) (not (= |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base| .cse4)) (= (select (select |c_#memory_$Pointer$.offset| .cse4) 4) 0) (not (= .cse5 .cse4)) (not (= .cse5 |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|)) (= (select (select |c_#memory_$Pointer$.base| .cse5) 4) 0) (= (select (select |c_#memory_$Pointer$.offset| .cse5) 4) 0) (not (= .cse5 |c_ULTIMATE.start_main_~#s~0#1.base|)))))) (= |c_ULTIMATE.start_sll_prepend_#t~ret7#1.offset| 0) (let ((.cse6 (select (select |c_#memory_$Pointer$.base| .cse0) 4))) (or (= |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base| .cse6) (and (= (select (select |c_#memory_$Pointer$.offset| .cse6) 4) 0) (= (select (select |c_#memory_$Pointer$.base| .cse6) 4) 0) (not (= |c_ULTIMATE.start_sll_prepend_~head#1.base| .cse6))))) (not (= |c_ULTIMATE.start_sll_prepend_~head#1.base| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|)) (<= (+ 2 |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|) |c_ULTIMATE.start_main_~#s~0#1.base|) (not (= |c_ULTIMATE.start_sll_prepend_~head#1.base| .cse0)) (= |c_ULTIMATE.start_sll_prepend_~head#1.offset| |c_ULTIMATE.start_main_~#s~0#1.offset|) (= (select (select |c_#memory_$Pointer$.offset| .cse0) 4) 0) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset|) |c_ULTIMATE.start_sll_prepend_#t~ret7#1.offset|))) is different from false [2022-11-20 11:12:41,095 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset|))) (and (= |c_ULTIMATE.start_sll_prepend_~head#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 0) (= |c_ULTIMATE.start_main_~#s~0#1.offset| 0) (not (= .cse0 |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|)) (or (exists ((|v_old(#memory_$Pointer$.base)_AFTER_CALL_35| (Array Int (Array Int Int)))) (let ((.cse1 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_35| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (let ((.cse3 (@diff |v_old(#memory_$Pointer$.base)_AFTER_CALL_35| |c_#memory_$Pointer$.base|)) (.cse2 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_35| .cse1) 4))) (and (= (select (select |c_#memory_$Pointer$.offset| .cse1) 4) 0) (not (= .cse2 |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|)) (not (= .cse1 .cse2)) (= .cse3 |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|) (not (= .cse1 |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|)) (= |c_#memory_$Pointer$.base| (store |v_old(#memory_$Pointer$.base)_AFTER_CALL_35| .cse3 (select |c_#memory_$Pointer$.base| .cse3))) (<= (+ .cse1 2) |c_ULTIMATE.start_main_~#s~0#1.base|) (= 0 (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_35| .cse2) 4)) (= (select (select |c_#memory_$Pointer$.offset| .cse2) 4) 0) (not (= .cse2 |c_ULTIMATE.start_main_~#s~0#1.base|)))))) (let ((.cse4 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (let ((.cse5 (select (select |c_#memory_$Pointer$.base| .cse4) 4))) (and (<= (+ 2 .cse4) |c_ULTIMATE.start_main_~#s~0#1.base|) (not (= |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base| .cse4)) (= (select (select |c_#memory_$Pointer$.offset| .cse4) 4) 0) (not (= .cse5 .cse4)) (not (= .cse5 |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|)) (= (select (select |c_#memory_$Pointer$.base| .cse5) 4) 0) (= (select (select |c_#memory_$Pointer$.offset| .cse5) 4) 0) (not (= .cse5 |c_ULTIMATE.start_main_~#s~0#1.base|)))))) (= |c_ULTIMATE.start_sll_prepend_#t~ret7#1.offset| 0) (let ((.cse6 (select (select |c_#memory_$Pointer$.base| .cse0) 4))) (or (= |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base| .cse6) (and (= (select (select |c_#memory_$Pointer$.offset| .cse6) 4) 0) (= (select (select |c_#memory_$Pointer$.base| .cse6) 4) 0) (not (= |c_ULTIMATE.start_sll_prepend_~head#1.base| .cse6))))) (not (= |c_ULTIMATE.start_sll_prepend_~head#1.base| |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|)) (<= (+ 2 |c_ULTIMATE.start_sll_prepend_#t~ret7#1.base|) |c_ULTIMATE.start_main_~#s~0#1.base|) (not (= |c_ULTIMATE.start_sll_prepend_~head#1.base| .cse0)) (= |c_ULTIMATE.start_sll_prepend_~head#1.offset| |c_ULTIMATE.start_main_~#s~0#1.offset|) (= (select (select |c_#memory_$Pointer$.offset| .cse0) 4) 0) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_prepend_~head#1.base|) |c_ULTIMATE.start_sll_prepend_~head#1.offset|) |c_ULTIMATE.start_sll_prepend_#t~ret7#1.offset|))) is different from true [2022-11-20 11:12:43,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:43,645 INFO L93 Difference]: Finished difference Result 129 states and 137 transitions. [2022-11-20 11:12:43,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-20 11:12:43,646 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 75 states have (on average 1.44) internal successors, (108), 68 states have internal predecessors, (108), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 64 [2022-11-20 11:12:43,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:43,647 INFO L225 Difference]: With dead ends: 129 [2022-11-20 11:12:43,647 INFO L226 Difference]: Without dead ends: 129 [2022-11-20 11:12:43,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 111 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2329 ImplicationChecksByTransitivity, 39.8s TimeCoverageRelationStatistics Valid=403, Invalid=11803, Unknown=12, NotChecked=438, Total=12656 [2022-11-20 11:12:43,649 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 110 mSDsluCounter, 1393 mSDsCounter, 0 mSdLazyCounter, 1538 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1433 SdHoareTripleChecker+Invalid, 1902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 346 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:43,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 1433 Invalid, 1902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1538 Invalid, 0 Unknown, 346 Unchecked, 1.7s Time] [2022-11-20 11:12:43,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-20 11:12:43,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 107. [2022-11-20 11:12:43,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 91 states have (on average 1.1538461538461537) internal successors, (105), 100 states have internal predecessors, (105), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-20 11:12:43,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 115 transitions. [2022-11-20 11:12:43,656 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 115 transitions. Word has length 64 [2022-11-20 11:12:43,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:43,657 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 115 transitions. [2022-11-20 11:12:43,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 75 states have (on average 1.44) internal successors, (108), 68 states have internal predecessors, (108), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-20 11:12:43,658 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 115 transitions. [2022-11-20 11:12:43,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-20 11:12:43,659 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:43,659 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 11:12:43,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-20 11:12:43,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:43,863 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-20 11:12:43,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:43,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1863371548, now seen corresponding path program 3 times [2022-11-20 11:12:43,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:43,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087387170] [2022-11-20 11:12:43,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:43,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:44,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:12:44,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:44,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 11:12:44,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:44,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 11:12:44,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:44,060 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 11:12:44,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:44,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087387170] [2022-11-20 11:12:44,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087387170] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:12:44,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501320529] [2022-11-20 11:12:44,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:12:44,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:44,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:12:44,062 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:12:44,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 11:12:44,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 11:12:44,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:12:44,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 11:12:44,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:45,189 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-20 11:12:45,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:12:45,363 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-20 11:12:45,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501320529] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:12:45,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:12:45,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 13 [2022-11-20 11:12:45,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765317743] [2022-11-20 11:12:45,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:12:45,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 11:12:45,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:45,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 11:12:45,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:12:45,365 INFO L87 Difference]: Start difference. First operand 107 states and 115 transitions. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 11:12:45,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:45,497 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2022-11-20 11:12:45,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:12:45,498 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2022-11-20 11:12:45,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:45,499 INFO L225 Difference]: With dead ends: 121 [2022-11-20 11:12:45,499 INFO L226 Difference]: Without dead ends: 121 [2022-11-20 11:12:45,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-20 11:12:45,500 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 111 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:45,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 474 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:12:45,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-20 11:12:45,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 110. [2022-11-20 11:12:45,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 94 states have (on average 1.1702127659574468) internal successors, (110), 103 states have internal predecessors, (110), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-20 11:12:45,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 120 transitions. [2022-11-20 11:12:45,510 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 120 transitions. Word has length 65 [2022-11-20 11:12:45,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:45,510 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 120 transitions. [2022-11-20 11:12:45,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 12 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-20 11:12:45,511 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 120 transitions. [2022-11-20 11:12:45,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-20 11:12:45,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:45,511 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:12:45,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 11:12:45,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-20 11:12:45,715 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-20 11:12:45,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:45,715 INFO L85 PathProgramCache]: Analyzing trace with hash -749426673, now seen corresponding path program 1 times [2022-11-20 11:12:45,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:45,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805865002] [2022-11-20 11:12:45,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:45,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:45,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:45,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:12:45,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:45,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 11:12:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:45,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 11:12:45,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:45,980 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-20 11:12:45,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:45,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805865002] [2022-11-20 11:12:45,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805865002] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:45,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:45,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 11:12:45,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231820027] [2022-11-20 11:12:45,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:45,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:12:45,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:45,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:12:45,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:12:45,983 INFO L87 Difference]: Start difference. First operand 110 states and 120 transitions. Second operand has 11 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:12:46,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:46,267 INFO L93 Difference]: Finished difference Result 119 states and 130 transitions. [2022-11-20 11:12:46,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:12:46,268 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 68 [2022-11-20 11:12:46,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:46,269 INFO L225 Difference]: With dead ends: 119 [2022-11-20 11:12:46,269 INFO L226 Difference]: Without dead ends: 119 [2022-11-20 11:12:46,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-20 11:12:46,270 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 87 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:46,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 225 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:12:46,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-20 11:12:46,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2022-11-20 11:12:46,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 104 states have internal predecessors, (113), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-20 11:12:46,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2022-11-20 11:12:46,281 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 68 [2022-11-20 11:12:46,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:46,282 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2022-11-20 11:12:46,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:12:46,282 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2022-11-20 11:12:46,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-20 11:12:46,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:46,283 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:12:46,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-20 11:12:46,284 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-20 11:12:46,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:46,284 INFO L85 PathProgramCache]: Analyzing trace with hash -749426672, now seen corresponding path program 1 times [2022-11-20 11:12:46,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:46,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432548763] [2022-11-20 11:12:46,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:46,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:46,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:46,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:12:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:46,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 11:12:46,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:46,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 11:12:46,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:46,732 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-20 11:12:46,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:46,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432548763] [2022-11-20 11:12:46,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432548763] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:46,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:46,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 11:12:46,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152861720] [2022-11-20 11:12:46,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:46,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:12:46,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:46,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:12:46,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:12:46,735 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand has 11 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:12:47,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:47,029 INFO L93 Difference]: Finished difference Result 119 states and 129 transitions. [2022-11-20 11:12:47,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 11:12:47,030 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 68 [2022-11-20 11:12:47,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:47,031 INFO L225 Difference]: With dead ends: 119 [2022-11-20 11:12:47,031 INFO L226 Difference]: Without dead ends: 119 [2022-11-20 11:12:47,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:12:47,032 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 99 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:47,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 207 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:12:47,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-20 11:12:47,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 113. [2022-11-20 11:12:47,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 98 states have (on average 1.163265306122449) internal successors, (114), 106 states have internal predecessors, (114), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-20 11:12:47,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 124 transitions. [2022-11-20 11:12:47,037 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 124 transitions. Word has length 68 [2022-11-20 11:12:47,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:47,037 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 124 transitions. [2022-11-20 11:12:47,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:12:47,038 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 124 transitions. [2022-11-20 11:12:47,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-20 11:12:47,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:47,039 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:12:47,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-20 11:12:47,039 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-20 11:12:47,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:47,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1757391830, now seen corresponding path program 1 times [2022-11-20 11:12:47,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:47,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10513417] [2022-11-20 11:12:47,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:47,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:47,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:47,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:12:47,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:47,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 11:12:47,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:47,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 11:12:47,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:47,347 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-20 11:12:47,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:47,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10513417] [2022-11-20 11:12:47,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10513417] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:47,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:47,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-20 11:12:47,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156941785] [2022-11-20 11:12:47,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:47,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:12:47,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:47,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:12:47,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:12:47,349 INFO L87 Difference]: Start difference. First operand 113 states and 124 transitions. Second operand has 11 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:12:47,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:47,610 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2022-11-20 11:12:47,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:12:47,611 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2022-11-20 11:12:47,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:47,613 INFO L225 Difference]: With dead ends: 116 [2022-11-20 11:12:47,613 INFO L226 Difference]: Without dead ends: 116 [2022-11-20 11:12:47,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:12:47,614 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 131 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:47,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 242 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:12:47,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-20 11:12:47,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2022-11-20 11:12:47,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 98 states have (on average 1.153061224489796) internal successors, (113), 106 states have internal predecessors, (113), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-20 11:12:47,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 123 transitions. [2022-11-20 11:12:47,622 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 123 transitions. Word has length 69 [2022-11-20 11:12:47,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:47,622 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 123 transitions. [2022-11-20 11:12:47,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:12:47,623 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 123 transitions. [2022-11-20 11:12:47,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-20 11:12:47,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:47,625 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:12:47,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-20 11:12:47,625 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-20 11:12:47,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:47,626 INFO L85 PathProgramCache]: Analyzing trace with hash -929953077, now seen corresponding path program 1 times [2022-11-20 11:12:47,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:47,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480224373] [2022-11-20 11:12:47,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:47,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:47,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:48,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:12:48,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:48,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 11:12:48,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:48,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 11:12:48,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:48,139 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-20 11:12:48,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:48,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480224373] [2022-11-20 11:12:48,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480224373] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:12:48,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:12:48,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 11:12:48,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222982584] [2022-11-20 11:12:48,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:12:48,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-20 11:12:48,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:12:48,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-20 11:12:48,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:12:48,143 INFO L87 Difference]: Start difference. First operand 113 states and 123 transitions. Second operand has 11 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:12:48,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:12:48,508 INFO L93 Difference]: Finished difference Result 114 states and 124 transitions. [2022-11-20 11:12:48,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 11:12:48,509 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-11-20 11:12:48,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:12:48,510 INFO L225 Difference]: With dead ends: 114 [2022-11-20 11:12:48,510 INFO L226 Difference]: Without dead ends: 114 [2022-11-20 11:12:48,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:12:48,511 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 118 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:12:48,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 227 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:12:48,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-20 11:12:48,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-11-20 11:12:48,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 99 states have (on average 1.1515151515151516) internal successors, (114), 107 states have internal predecessors, (114), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-20 11:12:48,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 124 transitions. [2022-11-20 11:12:48,526 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 124 transitions. Word has length 71 [2022-11-20 11:12:48,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:12:48,527 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 124 transitions. [2022-11-20 11:12:48,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-20 11:12:48,527 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 124 transitions. [2022-11-20 11:12:48,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-20 11:12:48,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:12:48,528 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:12:48,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-20 11:12:48,528 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 24 more)] === [2022-11-20 11:12:48,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:12:48,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1692934892, now seen corresponding path program 1 times [2022-11-20 11:12:48,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:12:48,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804364499] [2022-11-20 11:12:48,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:48,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:12:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:50,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-20 11:12:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:50,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 11:12:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:50,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-20 11:12:50,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:50,785 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 11:12:50,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:12:50,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804364499] [2022-11-20 11:12:50,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804364499] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:12:50,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176934645] [2022-11-20 11:12:50,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:12:50,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:12:50,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:12:50,789 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:12:50,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0e5d083-d757-4f05-bc22-c6103e2e81a3/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 11:12:51,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:12:51,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-20 11:12:51,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:12:51,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 11:12:51,542 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 [2022-11-20 11:12:52,163 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:12:52,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-11-20 11:12:53,495 INFO L321 Elim1Store]: treesize reduction 32, result has 28.9 percent of original size [2022-11-20 11:12:53,496 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 6 new quantified variables, introduced 3 case distinctions, treesize of input 205 treesize of output 111 [2022-11-20 11:12:54,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 11:12:54,684 INFO L321 Elim1Store]: treesize reduction 56, result has 84.5 percent of original size [2022-11-20 11:12:54,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 15 new quantified variables, introduced 36 case distinctions, treesize of input 160 treesize of output 382 [2022-11-20 11:13:17,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-11-20 11:13:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-20 11:13:17,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:13:18,425 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 11:13:18,426 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 37 treesize of output 41 [2022-11-20 11:13:19,953 INFO L321 Elim1Store]: treesize reduction 7, result has 83.3 percent of original size [2022-11-20 11:13:19,954 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 6 new quantified variables, introduced 3 case distinctions, treesize of input 218 treesize of output 152 [2022-11-20 11:13:28,823 WARN L233 SmtUtils]: Spent 8.26s on a formula simplification. DAG size of input: 65 DAG size of output: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 11:13:57,286 WARN L233 SmtUtils]: Spent 28.25s on a formula simplification. DAG size of input: 1847 DAG size of output: 1005 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-20 11:13:57,291 INFO L321 Elim1Store]: treesize reduction 3083, result has 46.9 percent of original size [2022-11-20 11:13:57,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 33 select indices, 33 select index equivalence classes, 0 disjoint index pairs (out of 528 index pairs), introduced 50 new quantified variables, introduced 528 case distinctions, treesize of input 3450 treesize of output 5199