./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/prefixsum_iter.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_iter.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 20:20:51,976 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 20:20:51,978 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 20:20:51,995 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 20:20:51,996 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 20:20:51,997 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 20:20:51,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 20:20:51,999 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 20:20:52,001 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 20:20:52,001 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 20:20:52,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 20:20:52,003 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 20:20:52,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 20:20:52,004 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 20:20:52,005 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 20:20:52,006 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 20:20:52,007 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 20:20:52,008 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 20:20:52,010 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 20:20:52,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 20:20:52,012 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 20:20:52,014 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 20:20:52,015 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 20:20:52,015 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 20:20:52,018 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 20:20:52,019 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 20:20:52,019 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 20:20:52,020 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 20:20:52,020 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 20:20:52,021 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 20:20:52,022 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 20:20:52,022 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 20:20:52,023 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 20:20:52,024 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 20:20:52,024 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 20:20:52,025 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 20:20:52,025 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 20:20:52,025 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 20:20:52,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 20:20:52,026 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 20:20:52,027 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 20:20:52,028 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 20:20:52,046 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 20:20:52,047 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 20:20:52,047 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 20:20:52,047 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 20:20:52,048 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 20:20:52,048 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 20:20:52,048 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 20:20:52,049 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 20:20:52,049 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 20:20:52,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 20:20:52,049 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 20:20:52,049 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 20:20:52,050 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 20:20:52,050 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 20:20:52,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 20:20:52,050 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 20:20:52,050 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 20:20:52,050 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 20:20:52,050 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 20:20:52,051 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 20:20:52,051 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 20:20:52,051 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 20:20:52,051 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 20:20:52,051 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 20:20:52,051 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 20:20:52,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:20:52,052 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 20:20:52,052 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 20:20:52,052 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 20:20:52,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 20:20:52,053 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 20:20:52,053 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 20:20:52,053 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 20:20:52,053 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 20:20:52,053 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d [2022-12-13 20:20:52,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 20:20:52,273 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 20:20:52,275 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 20:20:52,276 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 20:20:52,277 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 20:20:52,278 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/verifythis/prefixsum_iter.c [2022-12-13 20:20:54,801 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 20:20:54,947 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 20:20:54,948 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/sv-benchmarks/c/verifythis/prefixsum_iter.c [2022-12-13 20:20:54,952 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/data/e509246ee/2c3283e0a95d4faaa3b294d69f98d131/FLAG52c201a77 [2022-12-13 20:20:55,367 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/data/e509246ee/2c3283e0a95d4faaa3b294d69f98d131 [2022-12-13 20:20:55,369 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 20:20:55,370 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 20:20:55,371 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 20:20:55,371 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 20:20:55,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 20:20:55,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:20:55" (1/1) ... [2022-12-13 20:20:55,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4345162a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:20:55, skipping insertion in model container [2022-12-13 20:20:55,375 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:20:55" (1/1) ... [2022-12-13 20:20:55,380 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 20:20:55,391 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 20:20:55,484 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_69666539-ca1a-417a-a624-d6f636560e36/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2022-12-13 20:20:55,503 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:20:55,510 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 20:20:55,519 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_69666539-ca1a-417a-a624-d6f636560e36/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2022-12-13 20:20:55,527 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:20:55,537 INFO L208 MainTranslator]: Completed translation [2022-12-13 20:20:55,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:20:55 WrapperNode [2022-12-13 20:20:55,538 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 20:20:55,538 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 20:20:55,538 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 20:20:55,538 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 20:20:55,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:20:55" (1/1) ... [2022-12-13 20:20:55,550 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:20:55" (1/1) ... [2022-12-13 20:20:55,565 INFO L138 Inliner]: procedures = 22, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 131 [2022-12-13 20:20:55,565 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 20:20:55,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 20:20:55,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 20:20:55,566 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 20:20:55,572 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:20:55" (1/1) ... [2022-12-13 20:20:55,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:20:55" (1/1) ... [2022-12-13 20:20:55,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:20:55" (1/1) ... [2022-12-13 20:20:55,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:20:55" (1/1) ... [2022-12-13 20:20:55,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:20:55" (1/1) ... [2022-12-13 20:20:55,582 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:20:55" (1/1) ... [2022-12-13 20:20:55,583 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:20:55" (1/1) ... [2022-12-13 20:20:55,584 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:20:55" (1/1) ... [2022-12-13 20:20:55,585 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 20:20:55,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 20:20:55,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 20:20:55,586 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 20:20:55,587 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:20:55" (1/1) ... [2022-12-13 20:20:55,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:20:55,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:20:55,611 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 20:20:55,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 20:20:55,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 20:20:55,646 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-12-13 20:20:55,646 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-12-13 20:20:55,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 20:20:55,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 20:20:55,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 20:20:55,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 20:20:55,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 20:20:55,646 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 20:20:55,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-12-13 20:20:55,646 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-12-13 20:20:55,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 20:20:55,720 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 20:20:55,722 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 20:20:56,029 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 20:20:56,035 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 20:20:56,035 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2022-12-13 20:20:56,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:20:56 BoogieIcfgContainer [2022-12-13 20:20:56,036 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 20:20:56,039 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 20:20:56,039 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 20:20:56,043 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 20:20:56,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 08:20:55" (1/3) ... [2022-12-13 20:20:56,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d65ad50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:20:56, skipping insertion in model container [2022-12-13 20:20:56,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:20:55" (2/3) ... [2022-12-13 20:20:56,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d65ad50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:20:56, skipping insertion in model container [2022-12-13 20:20:56,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:20:56" (3/3) ... [2022-12-13 20:20:56,046 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2022-12-13 20:20:56,065 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 20:20:56,066 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2022-12-13 20:20:56,111 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 20:20:56,118 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2cb0b6b5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 20:20:56,118 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2022-12-13 20:20:56,122 INFO L276 IsEmpty]: Start isEmpty. Operand has 102 states, 61 states have (on average 1.819672131147541) internal successors, (111), 95 states have internal predecessors, (111), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 20:20:56,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-13 20:20:56,130 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:20:56,131 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:20:56,131 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:20:56,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:20:56,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1116940539, now seen corresponding path program 1 times [2022-12-13 20:20:56,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:20:56,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861922363] [2022-12-13 20:20:56,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:20:56,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:20:56,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:20:56,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:20:56,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:20:56,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 20:20:56,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:20:56,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 20:20:56,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:20:56,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 20:20:56,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:20:56,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:20:56,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:20:56,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861922363] [2022-12-13 20:20:56,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861922363] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:20:56,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:20:56,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 20:20:56,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204023128] [2022-12-13 20:20:56,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:20:56,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:20:56,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:20:56,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:20:56,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:20:56,368 INFO L87 Difference]: Start difference. First operand has 102 states, 61 states have (on average 1.819672131147541) internal successors, (111), 95 states have internal predecessors, (111), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 20:20:56,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:20:56,433 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2022-12-13 20:20:56,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:20:56,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-12-13 20:20:56,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:20:56,441 INFO L225 Difference]: With dead ends: 102 [2022-12-13 20:20:56,441 INFO L226 Difference]: Without dead ends: 100 [2022-12-13 20:20:56,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:20:56,445 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 3 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:20:56,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 192 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:20:56,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-12-13 20:20:56,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-12-13 20:20:56,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 60 states have (on average 1.6666666666666667) internal successors, (100), 93 states have internal predecessors, (100), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 20:20:56,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2022-12-13 20:20:56,474 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 29 [2022-12-13 20:20:56,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:20:56,475 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2022-12-13 20:20:56,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 20:20:56,475 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2022-12-13 20:20:56,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-13 20:20:56,476 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:20:56,476 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:20:56,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 20:20:56,477 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:20:56,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:20:56,479 INFO L85 PathProgramCache]: Analyzing trace with hash 236420795, now seen corresponding path program 1 times [2022-12-13 20:20:56,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:20:56,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613411091] [2022-12-13 20:20:56,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:20:56,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:20:56,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:20:56,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:20:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:20:56,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 20:20:56,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:20:56,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 20:20:56,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:20:56,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 20:20:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:20:56,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:20:56,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:20:56,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613411091] [2022-12-13 20:20:56,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613411091] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:20:56,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:20:56,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 20:20:56,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321124649] [2022-12-13 20:20:56,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:20:56,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:20:56,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:20:56,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:20:56,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:20:56,717 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 20:20:56,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:20:56,818 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2022-12-13 20:20:56,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:20:56,819 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2022-12-13 20:20:56,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:20:56,820 INFO L225 Difference]: With dead ends: 98 [2022-12-13 20:20:56,820 INFO L226 Difference]: Without dead ends: 98 [2022-12-13 20:20:56,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:20:56,822 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 153 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:20:56,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 155 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:20:56,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-12-13 20:20:56,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-12-13 20:20:56,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 60 states have (on average 1.6333333333333333) internal successors, (98), 91 states have internal predecessors, (98), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 20:20:56,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2022-12-13 20:20:56,828 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 29 [2022-12-13 20:20:56,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:20:56,829 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2022-12-13 20:20:56,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 20:20:56,830 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2022-12-13 20:20:56,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-13 20:20:56,830 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:20:56,830 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:20:56,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 20:20:56,831 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:20:56,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:20:56,831 INFO L85 PathProgramCache]: Analyzing trace with hash 236420796, now seen corresponding path program 1 times [2022-12-13 20:20:56,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:20:56,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034104885] [2022-12-13 20:20:56,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:20:56,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:20:56,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:20:57,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:20:57,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:20:57,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 20:20:57,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:20:57,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 20:20:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:20:57,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 20:20:57,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:20:57,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:20:57,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:20:57,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034104885] [2022-12-13 20:20:57,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034104885] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:20:57,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:20:57,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 20:20:57,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264509925] [2022-12-13 20:20:57,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:20:57,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 20:20:57,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:20:57,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 20:20:57,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-12-13 20:20:57,354 INFO L87 Difference]: Start difference. First operand 98 states and 106 transitions. Second operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 20:20:58,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:20:58,452 INFO L93 Difference]: Finished difference Result 260 states and 282 transitions. [2022-12-13 20:20:58,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 20:20:58,452 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2022-12-13 20:20:58,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:20:58,454 INFO L225 Difference]: With dead ends: 260 [2022-12-13 20:20:58,455 INFO L226 Difference]: Without dead ends: 260 [2022-12-13 20:20:58,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=234, Unknown=0, NotChecked=0, Total=342 [2022-12-13 20:20:58,456 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 915 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 20:20:58,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [918 Valid, 516 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 20:20:58,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-12-13 20:20:58,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 148. [2022-12-13 20:20:58,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 107 states have (on average 1.6728971962616823) internal successors, (179), 138 states have internal predecessors, (179), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:20:58,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 193 transitions. [2022-12-13 20:20:58,470 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 193 transitions. Word has length 29 [2022-12-13 20:20:58,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:20:58,470 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 193 transitions. [2022-12-13 20:20:58,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 20:20:58,471 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 193 transitions. [2022-12-13 20:20:58,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-13 20:20:58,471 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:20:58,472 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:20:58,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 20:20:58,472 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:20:58,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:20:58,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1260889940, now seen corresponding path program 1 times [2022-12-13 20:20:58,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:20:58,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11033403] [2022-12-13 20:20:58,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:20:58,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:20:58,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:20:58,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:20:58,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:20:58,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 20:20:58,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:20:58,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 20:20:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:20:58,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 20:20:58,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:20:58,530 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:20:58,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:20:58,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11033403] [2022-12-13 20:20:58,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11033403] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:20:58,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:20:58,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 20:20:58,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61434879] [2022-12-13 20:20:58,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:20:58,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:20:58,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:20:58,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:20:58,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:20:58,533 INFO L87 Difference]: Start difference. First operand 148 states and 193 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 20:20:58,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:20:58,601 INFO L93 Difference]: Finished difference Result 147 states and 191 transitions. [2022-12-13 20:20:58,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:20:58,601 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-12-13 20:20:58,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:20:58,602 INFO L225 Difference]: With dead ends: 147 [2022-12-13 20:20:58,602 INFO L226 Difference]: Without dead ends: 147 [2022-12-13 20:20:58,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:20:58,603 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 150 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:20:58,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 165 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:20:58,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-12-13 20:20:58,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-12-13 20:20:58,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 107 states have (on average 1.6542056074766356) internal successors, (177), 137 states have internal predecessors, (177), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:20:58,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 191 transitions. [2022-12-13 20:20:58,614 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 191 transitions. Word has length 30 [2022-12-13 20:20:58,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:20:58,614 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 191 transitions. [2022-12-13 20:20:58,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 20:20:58,614 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 191 transitions. [2022-12-13 20:20:58,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-13 20:20:58,615 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:20:58,615 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:20:58,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 20:20:58,615 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:20:58,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:20:58,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1260889939, now seen corresponding path program 1 times [2022-12-13 20:20:58,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:20:58,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022706397] [2022-12-13 20:20:58,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:20:58,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:20:58,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:20:58,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:20:58,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:20:58,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 20:20:58,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:20:58,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 20:20:58,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:20:58,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 20:20:58,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:20:58,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:20:58,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:20:58,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022706397] [2022-12-13 20:20:58,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022706397] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:20:58,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:20:58,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 20:20:58,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815548614] [2022-12-13 20:20:58,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:20:58,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 20:20:58,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:20:58,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 20:20:58,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-13 20:20:58,832 INFO L87 Difference]: Start difference. First operand 147 states and 191 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 20:20:59,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:20:59,166 INFO L93 Difference]: Finished difference Result 257 states and 334 transitions. [2022-12-13 20:20:59,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 20:20:59,166 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2022-12-13 20:20:59,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:20:59,168 INFO L225 Difference]: With dead ends: 257 [2022-12-13 20:20:59,168 INFO L226 Difference]: Without dead ends: 257 [2022-12-13 20:20:59,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-12-13 20:20:59,169 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 405 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 20:20:59,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 258 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 20:20:59,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-12-13 20:20:59,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 147. [2022-12-13 20:20:59,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 108 states have (on average 1.6388888888888888) internal successors, (177), 137 states have internal predecessors, (177), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:20:59,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 191 transitions. [2022-12-13 20:20:59,178 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 191 transitions. Word has length 30 [2022-12-13 20:20:59,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:20:59,178 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 191 transitions. [2022-12-13 20:20:59,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 20:20:59,178 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 191 transitions. [2022-12-13 20:20:59,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-13 20:20:59,179 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:20:59,179 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:20:59,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 20:20:59,179 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:20:59,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:20:59,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1311333523, now seen corresponding path program 1 times [2022-12-13 20:20:59,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:20:59,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202767214] [2022-12-13 20:20:59,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:20:59,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:20:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:20:59,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:20:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:20:59,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 20:20:59,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:20:59,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-12-13 20:20:59,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:20:59,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 20:20:59,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:20:59,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:20:59,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:20:59,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202767214] [2022-12-13 20:20:59,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202767214] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:20:59,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006211331] [2022-12-13 20:20:59,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:20:59,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:20:59,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:20:59,725 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:20:59,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 20:20:59,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:20:59,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 20:20:59,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:20:59,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 20:20:59,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 20:21:00,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:21:00,114 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 [2022-12-13 20:21:00,124 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 20:21:00,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 20:21:00,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 20:21:00,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:21:02,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006211331] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:21:02,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:21:02,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2022-12-13 20:21:02,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509386267] [2022-12-13 20:21:02,563 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:21:02,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 20:21:02,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:21:02,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 20:21:02,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-12-13 20:21:02,565 INFO L87 Difference]: Start difference. First operand 147 states and 191 transitions. Second operand has 21 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 20:21:04,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:21:04,050 INFO L93 Difference]: Finished difference Result 225 states and 272 transitions. [2022-12-13 20:21:04,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 20:21:04,051 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) Word has length 30 [2022-12-13 20:21:04,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:21:04,052 INFO L225 Difference]: With dead ends: 225 [2022-12-13 20:21:04,052 INFO L226 Difference]: Without dead ends: 225 [2022-12-13 20:21:04,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=341, Invalid=1465, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 20:21:04,054 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 1200 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1200 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 20:21:04,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1200 Valid, 649 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1092 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 20:21:04,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-12-13 20:21:04,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 150. [2022-12-13 20:21:04,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 112 states have (on average 1.5892857142857142) internal successors, (178), 140 states have internal predecessors, (178), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:21:04,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 192 transitions. [2022-12-13 20:21:04,061 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 192 transitions. Word has length 30 [2022-12-13 20:21:04,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:21:04,061 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 192 transitions. [2022-12-13 20:21:04,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-13 20:21:04,061 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 192 transitions. [2022-12-13 20:21:04,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-13 20:21:04,062 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:21:04,062 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:21:04,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 20:21:04,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 20:21:04,263 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:21:04,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:21:04,264 INFO L85 PathProgramCache]: Analyzing trace with hash -535927024, now seen corresponding path program 1 times [2022-12-13 20:21:04,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:21:04,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034784846] [2022-12-13 20:21:04,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:04,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:21:04,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:04,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:21:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:04,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 20:21:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:04,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 20:21:04,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:04,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 20:21:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:04,376 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:04,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:21:04,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034784846] [2022-12-13 20:21:04,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034784846] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:21:04,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:21:04,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 20:21:04,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740013966] [2022-12-13 20:21:04,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:21:04,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 20:21:04,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:21:04,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 20:21:04,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:21:04,378 INFO L87 Difference]: Start difference. First operand 150 states and 192 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:21:04,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:21:04,498 INFO L93 Difference]: Finished difference Result 246 states and 266 transitions. [2022-12-13 20:21:04,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 20:21:04,499 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2022-12-13 20:21:04,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:21:04,500 INFO L225 Difference]: With dead ends: 246 [2022-12-13 20:21:04,500 INFO L226 Difference]: Without dead ends: 246 [2022-12-13 20:21:04,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-12-13 20:21:04,501 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 334 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:21:04,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 471 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:21:04,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-12-13 20:21:04,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 144. [2022-12-13 20:21:04,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 106 states have (on average 1.5471698113207548) internal successors, (164), 134 states have internal predecessors, (164), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:21:04,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 178 transitions. [2022-12-13 20:21:04,508 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 178 transitions. Word has length 32 [2022-12-13 20:21:04,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:21:04,508 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 178 transitions. [2022-12-13 20:21:04,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:21:04,508 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 178 transitions. [2022-12-13 20:21:04,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-13 20:21:04,509 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:21:04,509 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:21:04,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 20:21:04,510 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:21:04,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:21:04,510 INFO L85 PathProgramCache]: Analyzing trace with hash 566089799, now seen corresponding path program 1 times [2022-12-13 20:21:04,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:21:04,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193089110] [2022-12-13 20:21:04,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:04,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:21:04,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:04,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:21:04,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:04,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 20:21:04,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:04,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 20:21:04,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:04,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 20:21:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:04,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:04,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:21:04,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193089110] [2022-12-13 20:21:04,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193089110] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:21:04,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:21:04,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 20:21:04,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620609129] [2022-12-13 20:21:04,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:21:04,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 20:21:04,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:21:04,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 20:21:04,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:21:04,626 INFO L87 Difference]: Start difference. First operand 144 states and 178 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 20:21:04,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:21:04,715 INFO L93 Difference]: Finished difference Result 138 states and 166 transitions. [2022-12-13 20:21:04,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 20:21:04,716 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2022-12-13 20:21:04,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:21:04,717 INFO L225 Difference]: With dead ends: 138 [2022-12-13 20:21:04,717 INFO L226 Difference]: Without dead ends: 138 [2022-12-13 20:21:04,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-13 20:21:04,718 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 173 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:21:04,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 169 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:21:04,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-12-13 20:21:04,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-12-13 20:21:04,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 106 states have (on average 1.4339622641509433) internal successors, (152), 128 states have internal predecessors, (152), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:21:04,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 166 transitions. [2022-12-13 20:21:04,723 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 166 transitions. Word has length 33 [2022-12-13 20:21:04,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:21:04,723 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 166 transitions. [2022-12-13 20:21:04,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 20:21:04,724 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 166 transitions. [2022-12-13 20:21:04,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-13 20:21:04,724 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:21:04,725 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:21:04,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 20:21:04,725 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:21:04,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:21:04,725 INFO L85 PathProgramCache]: Analyzing trace with hash 566089800, now seen corresponding path program 1 times [2022-12-13 20:21:04,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:21:04,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752175322] [2022-12-13 20:21:04,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:04,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:21:04,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:04,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:21:04,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:04,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 20:21:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:04,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 20:21:04,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:04,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 20:21:04,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:04,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 20:21:04,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:21:04,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752175322] [2022-12-13 20:21:04,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752175322] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:21:04,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:21:04,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-12-13 20:21:04,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269760656] [2022-12-13 20:21:04,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:21:04,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 20:21:04,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:21:04,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 20:21:04,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-12-13 20:21:04,885 INFO L87 Difference]: Start difference. First operand 138 states and 166 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 20:21:05,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:21:05,064 INFO L93 Difference]: Finished difference Result 178 states and 195 transitions. [2022-12-13 20:21:05,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 20:21:05,065 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2022-12-13 20:21:05,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:21:05,065 INFO L225 Difference]: With dead ends: 178 [2022-12-13 20:21:05,065 INFO L226 Difference]: Without dead ends: 178 [2022-12-13 20:21:05,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-12-13 20:21:05,066 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 409 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:21:05,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 572 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:21:05,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-12-13 20:21:05,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 107. [2022-12-13 20:21:05,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 75 states have (on average 1.4) internal successors, (105), 97 states have internal predecessors, (105), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:21:05,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2022-12-13 20:21:05,070 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 33 [2022-12-13 20:21:05,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:21:05,071 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2022-12-13 20:21:05,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 20:21:05,071 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2022-12-13 20:21:05,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-13 20:21:05,072 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:21:05,072 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 20:21:05,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 20:21:05,072 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:21:05,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:21:05,073 INFO L85 PathProgramCache]: Analyzing trace with hash -491610599, now seen corresponding path program 1 times [2022-12-13 20:21:05,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:21:05,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369956779] [2022-12-13 20:21:05,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:05,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:21:05,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:05,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:21:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:05,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 20:21:05,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:05,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 20:21:05,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:05,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 20:21:05,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:05,354 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:05,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:21:05,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369956779] [2022-12-13 20:21:05,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369956779] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:21:05,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405595099] [2022-12-13 20:21:05,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:05,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:21:05,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:21:05,356 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:21:05,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 20:21:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:05,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 20:21:05,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:21:05,412 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 10 treesize of output 9 [2022-12-13 20:21:05,921 INFO L321 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2022-12-13 20:21:05,922 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 18 treesize of output 20 [2022-12-13 20:21:06,349 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:06,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:21:06,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405595099] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:21:06,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:21:06,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2022-12-13 20:21:06,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079754926] [2022-12-13 20:21:06,586 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:21:06,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 20:21:06,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:21:06,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 20:21:06,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-12-13 20:21:06,587 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand has 15 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-13 20:21:07,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:21:07,499 INFO L93 Difference]: Finished difference Result 107 states and 119 transitions. [2022-12-13 20:21:07,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 20:21:07,500 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 35 [2022-12-13 20:21:07,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:21:07,501 INFO L225 Difference]: With dead ends: 107 [2022-12-13 20:21:07,501 INFO L226 Difference]: Without dead ends: 107 [2022-12-13 20:21:07,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2022-12-13 20:21:07,501 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 313 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 20:21:07,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 241 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 20:21:07,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-12-13 20:21:07,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 102. [2022-12-13 20:21:07,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 72 states have (on average 1.3888888888888888) internal successors, (100), 92 states have internal predecessors, (100), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:21:07,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 114 transitions. [2022-12-13 20:21:07,504 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 114 transitions. Word has length 35 [2022-12-13 20:21:07,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:21:07,504 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 114 transitions. [2022-12-13 20:21:07,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-13 20:21:07,504 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 114 transitions. [2022-12-13 20:21:07,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-13 20:21:07,505 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:21:07,505 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:21:07,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 20:21:07,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 20:21:07,707 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:21:07,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:21:07,708 INFO L85 PathProgramCache]: Analyzing trace with hash 7143804, now seen corresponding path program 1 times [2022-12-13 20:21:07,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:21:07,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386055032] [2022-12-13 20:21:07,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:07,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:21:07,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:07,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:21:07,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:07,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 20:21:07,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:07,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 20:21:07,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:07,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 20:21:07,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:07,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:07,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:21:07,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386055032] [2022-12-13 20:21:07,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386055032] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:21:07,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:21:07,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 20:21:07,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775203576] [2022-12-13 20:21:07,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:21:07,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:21:07,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:21:07,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:21:07,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:21:07,758 INFO L87 Difference]: Start difference. First operand 102 states and 114 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:21:07,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:21:07,821 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2022-12-13 20:21:07,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:21:07,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2022-12-13 20:21:07,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:21:07,823 INFO L225 Difference]: With dead ends: 101 [2022-12-13 20:21:07,823 INFO L226 Difference]: Without dead ends: 101 [2022-12-13 20:21:07,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:21:07,823 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 113 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:21:07,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 162 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:21:07,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-12-13 20:21:07,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2022-12-13 20:21:07,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 72 states have (on average 1.3472222222222223) internal successors, (97), 89 states have internal predecessors, (97), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:21:07,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2022-12-13 20:21:07,826 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 37 [2022-12-13 20:21:07,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:21:07,827 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2022-12-13 20:21:07,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:21:07,827 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2022-12-13 20:21:07,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-13 20:21:07,827 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:21:07,827 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:21:07,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 20:21:07,827 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:21:07,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:21:07,828 INFO L85 PathProgramCache]: Analyzing trace with hash 7143805, now seen corresponding path program 1 times [2022-12-13 20:21:07,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:21:07,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461478042] [2022-12-13 20:21:07,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:07,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:21:07,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:07,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:21:07,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:07,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 20:21:07,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:07,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 20:21:07,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:07,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 20:21:07,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:07,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:07,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:21:07,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461478042] [2022-12-13 20:21:07,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461478042] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:21:07,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959473902] [2022-12-13 20:21:07,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:07,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:21:07,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:21:07,918 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:21:07,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 20:21:07,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:07,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 20:21:07,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:21:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:08,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:21:08,039 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:08,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959473902] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:21:08,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:21:08,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 11 [2022-12-13 20:21:08,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665832004] [2022-12-13 20:21:08,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:21:08,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 20:21:08,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:21:08,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 20:21:08,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-12-13 20:21:08,041 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:21:08,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:21:08,195 INFO L93 Difference]: Finished difference Result 227 states and 247 transitions. [2022-12-13 20:21:08,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 20:21:08,195 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2022-12-13 20:21:08,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:21:08,196 INFO L225 Difference]: With dead ends: 227 [2022-12-13 20:21:08,196 INFO L226 Difference]: Without dead ends: 227 [2022-12-13 20:21:08,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-12-13 20:21:08,197 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 506 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:21:08,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 472 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:21:08,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-12-13 20:21:08,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 107. [2022-12-13 20:21:08,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 80 states have (on average 1.325) internal successors, (106), 97 states have internal predecessors, (106), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:21:08,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 120 transitions. [2022-12-13 20:21:08,201 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 120 transitions. Word has length 37 [2022-12-13 20:21:08,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:21:08,202 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 120 transitions. [2022-12-13 20:21:08,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:21:08,202 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 120 transitions. [2022-12-13 20:21:08,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-13 20:21:08,203 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:21:08,203 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:21:08,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 20:21:08,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 20:21:08,403 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:21:08,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:21:08,404 INFO L85 PathProgramCache]: Analyzing trace with hash 221416284, now seen corresponding path program 1 times [2022-12-13 20:21:08,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:21:08,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336841395] [2022-12-13 20:21:08,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:08,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:21:08,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:08,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:21:08,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:08,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 20:21:08,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:08,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 20:21:08,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:08,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 20:21:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:08,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:08,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:21:08,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336841395] [2022-12-13 20:21:08,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336841395] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:21:08,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524703254] [2022-12-13 20:21:08,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:08,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:21:08,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:21:08,639 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:21:08,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 20:21:08,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:08,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 20:21:08,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:21:08,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:08,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:21:08,992 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 29 treesize of output 25 [2022-12-13 20:21:09,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:09,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524703254] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:21:09,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:21:09,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2022-12-13 20:21:09,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280933010] [2022-12-13 20:21:09,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:21:09,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 20:21:09,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:21:09,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 20:21:09,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-12-13 20:21:09,054 INFO L87 Difference]: Start difference. First operand 107 states and 120 transitions. Second operand has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-13 20:21:09,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:21:09,685 INFO L93 Difference]: Finished difference Result 169 states and 187 transitions. [2022-12-13 20:21:09,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 20:21:09,685 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 38 [2022-12-13 20:21:09,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:21:09,686 INFO L225 Difference]: With dead ends: 169 [2022-12-13 20:21:09,686 INFO L226 Difference]: Without dead ends: 169 [2022-12-13 20:21:09,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=452, Invalid=1528, Unknown=0, NotChecked=0, Total=1980 [2022-12-13 20:21:09,687 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 1195 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1196 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:21:09,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1196 Valid, 315 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 20:21:09,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-12-13 20:21:09,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 106. [2022-12-13 20:21:09,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 80 states have (on average 1.3125) internal successors, (105), 96 states have internal predecessors, (105), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:21:09,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 119 transitions. [2022-12-13 20:21:09,691 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 119 transitions. Word has length 38 [2022-12-13 20:21:09,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:21:09,691 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 119 transitions. [2022-12-13 20:21:09,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-13 20:21:09,691 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 119 transitions. [2022-12-13 20:21:09,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-13 20:21:09,691 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:21:09,692 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:21:09,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 20:21:09,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 20:21:09,893 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:21:09,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:21:09,894 INFO L85 PathProgramCache]: Analyzing trace with hash -311817583, now seen corresponding path program 2 times [2022-12-13 20:21:09,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:21:09,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344657608] [2022-12-13 20:21:09,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:09,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:21:09,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:10,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:21:10,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:10,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 20:21:10,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:10,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 20:21:10,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:10,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 20:21:10,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:10,121 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:10,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:21:10,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344657608] [2022-12-13 20:21:10,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344657608] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:21:10,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486531636] [2022-12-13 20:21:10,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:21:10,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:21:10,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:21:10,123 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:21:10,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 20:21:10,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:21:10,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:21:10,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 20:21:10,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:21:10,312 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:10,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:21:10,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-12-13 20:21:10,447 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:10,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486531636] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:21:10,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:21:10,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-12-13 20:21:10,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041630592] [2022-12-13 20:21:10,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:21:10,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 20:21:10,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:21:10,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 20:21:10,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-12-13 20:21:10,449 INFO L87 Difference]: Start difference. First operand 106 states and 119 transitions. Second operand has 22 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-13 20:21:11,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:21:11,089 INFO L93 Difference]: Finished difference Result 375 states and 406 transitions. [2022-12-13 20:21:11,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 20:21:11,090 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 42 [2022-12-13 20:21:11,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:21:11,091 INFO L225 Difference]: With dead ends: 375 [2022-12-13 20:21:11,091 INFO L226 Difference]: Without dead ends: 375 [2022-12-13 20:21:11,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 20:21:11,092 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 1727 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1727 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 20:21:11,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1727 Valid, 636 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 20:21:11,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-12-13 20:21:11,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 118. [2022-12-13 20:21:11,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 92 states have (on average 1.358695652173913) internal successors, (125), 108 states have internal predecessors, (125), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:21:11,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 139 transitions. [2022-12-13 20:21:11,099 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 139 transitions. Word has length 42 [2022-12-13 20:21:11,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:21:11,099 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 139 transitions. [2022-12-13 20:21:11,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-13 20:21:11,099 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 139 transitions. [2022-12-13 20:21:11,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-13 20:21:11,100 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:21:11,100 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:21:11,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 20:21:11,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:21:11,300 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:21:11,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:21:11,301 INFO L85 PathProgramCache]: Analyzing trace with hash -804107195, now seen corresponding path program 1 times [2022-12-13 20:21:11,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:21:11,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694636102] [2022-12-13 20:21:11,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:11,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:21:11,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:11,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:21:11,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:11,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 20:21:11,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:11,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 20:21:11,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:11,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 20:21:11,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:11,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:11,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:21:11,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694636102] [2022-12-13 20:21:11,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694636102] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:21:11,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078455098] [2022-12-13 20:21:11,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:11,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:21:11,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:21:11,412 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:21:11,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 20:21:11,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:11,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 20:21:11,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:21:11,504 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:11,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:21:11,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:11,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078455098] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:21:11,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:21:11,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 11 [2022-12-13 20:21:11,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065044137] [2022-12-13 20:21:11,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:21:11,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 20:21:11,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:21:11,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 20:21:11,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-12-13 20:21:11,546 INFO L87 Difference]: Start difference. First operand 118 states and 139 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:21:11,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:21:11,703 INFO L93 Difference]: Finished difference Result 319 states and 357 transitions. [2022-12-13 20:21:11,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 20:21:11,703 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2022-12-13 20:21:11,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:21:11,704 INFO L225 Difference]: With dead ends: 319 [2022-12-13 20:21:11,705 INFO L226 Difference]: Without dead ends: 319 [2022-12-13 20:21:11,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 85 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-12-13 20:21:11,706 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 350 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:21:11,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 851 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:21:11,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-12-13 20:21:11,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 125. [2022-12-13 20:21:11,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 99 states have (on average 1.3434343434343434) internal successors, (133), 115 states have internal predecessors, (133), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:21:11,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 147 transitions. [2022-12-13 20:21:11,711 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 147 transitions. Word has length 42 [2022-12-13 20:21:11,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:21:11,712 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 147 transitions. [2022-12-13 20:21:11,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:21:11,712 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 147 transitions. [2022-12-13 20:21:11,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-13 20:21:11,712 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:21:11,713 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:21:11,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 20:21:11,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:21:11,914 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:21:11,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:21:11,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1076410474, now seen corresponding path program 1 times [2022-12-13 20:21:11,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:21:11,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673396039] [2022-12-13 20:21:11,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:11,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:21:11,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:12,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:21:12,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:12,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 20:21:12,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:12,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 20:21:12,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:12,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 20:21:12,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:12,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:21:12,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673396039] [2022-12-13 20:21:12,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673396039] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:21:12,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540261413] [2022-12-13 20:21:12,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:12,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:21:12,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:21:12,101 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:21:12,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 20:21:12,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:12,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 20:21:12,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:21:12,300 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:12,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:21:12,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-12-13 20:21:12,478 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:12,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540261413] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:21:12,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:21:12,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2022-12-13 20:21:12,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041449663] [2022-12-13 20:21:12,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:21:12,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 20:21:12,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:21:12,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 20:21:12,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-12-13 20:21:12,480 INFO L87 Difference]: Start difference. First operand 125 states and 147 transitions. Second operand has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-13 20:21:13,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:21:13,174 INFO L93 Difference]: Finished difference Result 311 states and 345 transitions. [2022-12-13 20:21:13,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 20:21:13,175 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 43 [2022-12-13 20:21:13,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:21:13,176 INFO L225 Difference]: With dead ends: 311 [2022-12-13 20:21:13,177 INFO L226 Difference]: Without dead ends: 311 [2022-12-13 20:21:13,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2022-12-13 20:21:13,177 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 1017 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1017 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 20:21:13,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1017 Valid, 1017 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 20:21:13,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-12-13 20:21:13,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 125. [2022-12-13 20:21:13,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 100 states have (on average 1.32) internal successors, (132), 115 states have internal predecessors, (132), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:21:13,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 146 transitions. [2022-12-13 20:21:13,180 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 146 transitions. Word has length 43 [2022-12-13 20:21:13,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:21:13,180 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 146 transitions. [2022-12-13 20:21:13,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-13 20:21:13,181 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 146 transitions. [2022-12-13 20:21:13,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-13 20:21:13,181 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:21:13,181 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:21:13,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 20:21:13,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 20:21:13,383 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:21:13,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:21:13,384 INFO L85 PathProgramCache]: Analyzing trace with hash 842447236, now seen corresponding path program 1 times [2022-12-13 20:21:13,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:21:13,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775250837] [2022-12-13 20:21:13,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:13,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:21:13,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:13,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:21:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:13,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 20:21:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:13,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 20:21:13,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:13,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 20:21:13,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:13,452 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:13,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:21:13,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775250837] [2022-12-13 20:21:13,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775250837] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:21:13,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:21:13,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 20:21:13,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224953396] [2022-12-13 20:21:13,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:21:13,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:21:13,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:21:13,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:21:13,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:21:13,453 INFO L87 Difference]: Start difference. First operand 125 states and 146 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:21:13,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:21:13,518 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2022-12-13 20:21:13,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:21:13,519 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2022-12-13 20:21:13,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:21:13,520 INFO L225 Difference]: With dead ends: 124 [2022-12-13 20:21:13,520 INFO L226 Difference]: Without dead ends: 124 [2022-12-13 20:21:13,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:21:13,521 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 67 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:21:13,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 185 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:21:13,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-12-13 20:21:13,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-12-13 20:21:13,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 100 states have (on average 1.31) internal successors, (131), 114 states have internal predecessors, (131), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:21:13,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 145 transitions. [2022-12-13 20:21:13,525 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 145 transitions. Word has length 43 [2022-12-13 20:21:13,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:21:13,525 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 145 transitions. [2022-12-13 20:21:13,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:21:13,525 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 145 transitions. [2022-12-13 20:21:13,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-13 20:21:13,526 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:21:13,526 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:21:13,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 20:21:13,526 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:21:13,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:21:13,526 INFO L85 PathProgramCache]: Analyzing trace with hash 842447237, now seen corresponding path program 1 times [2022-12-13 20:21:13,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:21:13,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007855353] [2022-12-13 20:21:13,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:13,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:21:13,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:13,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:21:13,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:13,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 20:21:13,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:13,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 20:21:13,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:13,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 20:21:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:13,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:13,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:21:13,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007855353] [2022-12-13 20:21:13,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007855353] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:21:13,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575217616] [2022-12-13 20:21:13,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:13,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:21:13,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:21:13,716 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:21:13,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 20:21:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:13,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 20:21:13,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:21:13,869 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:13,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:21:13,922 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 23 treesize of output 19 [2022-12-13 20:21:13,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:13,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575217616] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:21:13,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:21:13,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 17 [2022-12-13 20:21:13,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961967322] [2022-12-13 20:21:13,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:21:13,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 20:21:13,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:21:13,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 20:21:13,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-12-13 20:21:13,949 INFO L87 Difference]: Start difference. First operand 124 states and 145 transitions. Second operand has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-13 20:21:14,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:21:14,472 INFO L93 Difference]: Finished difference Result 246 states and 279 transitions. [2022-12-13 20:21:14,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 20:21:14,472 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2022-12-13 20:21:14,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:21:14,473 INFO L225 Difference]: With dead ends: 246 [2022-12-13 20:21:14,473 INFO L226 Difference]: Without dead ends: 246 [2022-12-13 20:21:14,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=301, Invalid=889, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 20:21:14,474 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 933 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 20:21:14,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [934 Valid, 379 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 20:21:14,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-12-13 20:21:14,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 126. [2022-12-13 20:21:14,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 102 states have (on average 1.3137254901960784) internal successors, (134), 116 states have internal predecessors, (134), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:21:14,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 148 transitions. [2022-12-13 20:21:14,477 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 148 transitions. Word has length 43 [2022-12-13 20:21:14,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:21:14,477 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 148 transitions. [2022-12-13 20:21:14,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-13 20:21:14,477 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 148 transitions. [2022-12-13 20:21:14,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-13 20:21:14,477 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:21:14,478 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:21:14,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 20:21:14,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 20:21:14,678 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:21:14,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:21:14,679 INFO L85 PathProgramCache]: Analyzing trace with hash 2137907964, now seen corresponding path program 1 times [2022-12-13 20:21:14,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:21:14,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943788174] [2022-12-13 20:21:14,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:14,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:21:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:14,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:21:14,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:14,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 20:21:14,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:14,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 20:21:14,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:14,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 20:21:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:14,763 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:14,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:21:14,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943788174] [2022-12-13 20:21:14,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943788174] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:21:14,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376107] [2022-12-13 20:21:14,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:14,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:21:14,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:21:14,765 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:21:14,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 20:21:14,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:14,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 20:21:14,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:21:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:14,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:21:14,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:14,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376107] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:21:14,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:21:14,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 11 [2022-12-13 20:21:14,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496938247] [2022-12-13 20:21:14,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:21:14,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 20:21:14,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:21:14,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 20:21:14,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-12-13 20:21:14,894 INFO L87 Difference]: Start difference. First operand 126 states and 148 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:21:15,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:21:15,039 INFO L93 Difference]: Finished difference Result 222 states and 255 transitions. [2022-12-13 20:21:15,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 20:21:15,039 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 45 [2022-12-13 20:21:15,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:21:15,040 INFO L225 Difference]: With dead ends: 222 [2022-12-13 20:21:15,040 INFO L226 Difference]: Without dead ends: 222 [2022-12-13 20:21:15,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2022-12-13 20:21:15,041 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 419 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:21:15,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 385 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:21:15,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-12-13 20:21:15,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 126. [2022-12-13 20:21:15,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 102 states have (on average 1.303921568627451) internal successors, (133), 116 states have internal predecessors, (133), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:21:15,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 147 transitions. [2022-12-13 20:21:15,045 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 147 transitions. Word has length 45 [2022-12-13 20:21:15,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:21:15,046 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 147 transitions. [2022-12-13 20:21:15,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:21:15,046 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 147 transitions. [2022-12-13 20:21:15,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-13 20:21:15,046 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:21:15,046 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:21:15,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-13 20:21:15,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:21:15,248 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:21:15,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:21:15,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1164235796, now seen corresponding path program 1 times [2022-12-13 20:21:15,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:21:15,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55671563] [2022-12-13 20:21:15,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:15,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:21:15,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:15,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:21:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:15,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 20:21:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:15,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 20:21:15,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:15,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 20:21:15,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:15,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:21:15,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55671563] [2022-12-13 20:21:15,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55671563] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:21:15,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532848127] [2022-12-13 20:21:15,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:15,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:21:15,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:21:15,384 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:21:15,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 20:21:15,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:15,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 20:21:15,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:21:15,481 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:15,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:21:15,534 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:15,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532848127] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:21:15,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:21:15,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2022-12-13 20:21:15,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350657191] [2022-12-13 20:21:15,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:21:15,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 20:21:15,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:21:15,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 20:21:15,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-12-13 20:21:15,536 INFO L87 Difference]: Start difference. First operand 126 states and 147 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:21:15,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:21:15,928 INFO L93 Difference]: Finished difference Result 336 states and 363 transitions. [2022-12-13 20:21:15,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-13 20:21:15,928 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2022-12-13 20:21:15,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:21:15,929 INFO L225 Difference]: With dead ends: 336 [2022-12-13 20:21:15,930 INFO L226 Difference]: Without dead ends: 336 [2022-12-13 20:21:15,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=844, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 20:21:15,930 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 892 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 1354 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:21:15,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [895 Valid, 1354 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 20:21:15,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-12-13 20:21:15,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 127. [2022-12-13 20:21:15,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 103 states have (on average 1.2718446601941749) internal successors, (131), 117 states have internal predecessors, (131), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:21:15,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 145 transitions. [2022-12-13 20:21:15,935 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 145 transitions. Word has length 46 [2022-12-13 20:21:15,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:21:15,936 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 145 transitions. [2022-12-13 20:21:15,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:21:15,936 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 145 transitions. [2022-12-13 20:21:15,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-13 20:21:15,936 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:21:15,937 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:21:15,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 20:21:16,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:21:16,138 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:21:16,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:21:16,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1851808460, now seen corresponding path program 1 times [2022-12-13 20:21:16,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:21:16,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678230264] [2022-12-13 20:21:16,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:16,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:21:16,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:16,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:21:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:16,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 20:21:16,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:16,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 20:21:16,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:16,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 20:21:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:16,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:16,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:21:16,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678230264] [2022-12-13 20:21:16,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678230264] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:21:16,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541169382] [2022-12-13 20:21:16,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:16,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:21:16,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:21:16,436 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:21:16,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 20:21:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:16,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-13 20:21:16,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:21:16,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 20:21:16,588 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 7 treesize of output 6 [2022-12-13 20:21:16,642 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 20:21:16,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 20:21:16,665 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_316 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.meminit_#ptr.base| v_ArrVal_316) |c_#memory_int|)) is different from true [2022-12-13 20:21:16,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-12-13 20:21:16,704 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 13 treesize of output 15 [2022-12-13 20:21:16,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2022-12-13 20:21:16,786 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 18 treesize of output 14 [2022-12-13 20:21:16,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-12-13 20:21:16,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:21:34,929 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_downsweep_~n#1| Int) (|ULTIMATE.start_downsweep_~a#1.offset| Int) (|ULTIMATE.start_check_~a#1.offset| Int) (|ULTIMATE.start_check_~i~0#1| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_downsweep_~a#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_downsweep_~a#1.base|) (+ |ULTIMATE.start_downsweep_~a#1.offset| (- 4) (* |ULTIMATE.start_downsweep_~n#1| 4)) 0)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))) 0)) is different from false [2022-12-13 20:21:37,067 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_317 (Array Int Int))) (= ((as const (Array Int Int)) 0) (select (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| v_ArrVal_317) |c_ULTIMATE.start_main_~a~0#1.base|))) is different from false [2022-12-13 20:21:37,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541169382] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:21:37,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:21:37,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 31 [2022-12-13 20:21:37,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931015797] [2022-12-13 20:21:37,078 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:21:37,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 20:21:37,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:21:37,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 20:21:37,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=952, Unknown=22, NotChecked=192, Total=1260 [2022-12-13 20:21:37,079 INFO L87 Difference]: Start difference. First operand 127 states and 145 transitions. Second operand has 31 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 6 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-12-13 20:21:39,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:21:39,024 INFO L93 Difference]: Finished difference Result 268 states and 295 transitions. [2022-12-13 20:21:39,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-13 20:21:39,024 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 6 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 46 [2022-12-13 20:21:39,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:21:39,026 INFO L225 Difference]: With dead ends: 268 [2022-12-13 20:21:39,026 INFO L226 Difference]: Without dead ends: 268 [2022-12-13 20:21:39,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=880, Invalid=4508, Unknown=26, NotChecked=438, Total=5852 [2022-12-13 20:21:39,029 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 1283 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 1370 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1284 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-13 20:21:39,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1284 Valid, 1283 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1370 Invalid, 0 Unknown, 171 Unchecked, 0.6s Time] [2022-12-13 20:21:39,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-12-13 20:21:39,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 132. [2022-12-13 20:21:39,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 108 states have (on average 1.2592592592592593) internal successors, (136), 122 states have internal predecessors, (136), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:21:39,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 150 transitions. [2022-12-13 20:21:39,034 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 150 transitions. Word has length 46 [2022-12-13 20:21:39,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:21:39,034 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 150 transitions. [2022-12-13 20:21:39,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 6 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-12-13 20:21:39,034 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 150 transitions. [2022-12-13 20:21:39,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-13 20:21:39,034 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:21:39,034 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:21:39,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 20:21:39,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:21:39,236 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:21:39,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:21:39,237 INFO L85 PathProgramCache]: Analyzing trace with hash -316520070, now seen corresponding path program 1 times [2022-12-13 20:21:39,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:21:39,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907866400] [2022-12-13 20:21:39,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:39,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:21:39,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:39,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:21:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:39,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 20:21:39,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:39,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 20:21:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:39,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 20:21:39,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:39,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:39,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:21:39,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907866400] [2022-12-13 20:21:39,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907866400] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:21:39,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133237527] [2022-12-13 20:21:39,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:39,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:21:39,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:21:39,386 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:21:39,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 20:21:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:39,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 20:21:39,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:21:39,496 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:39,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:21:39,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:39,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133237527] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:21:39,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:21:39,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 18 [2022-12-13 20:21:39,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779755507] [2022-12-13 20:21:39,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:21:39,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 20:21:39,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:21:39,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 20:21:39,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-12-13 20:21:39,552 INFO L87 Difference]: Start difference. First operand 132 states and 150 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:21:39,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:21:39,874 INFO L93 Difference]: Finished difference Result 392 states and 429 transitions. [2022-12-13 20:21:39,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 20:21:39,875 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 47 [2022-12-13 20:21:39,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:21:39,875 INFO L225 Difference]: With dead ends: 392 [2022-12-13 20:21:39,875 INFO L226 Difference]: Without dead ends: 392 [2022-12-13 20:21:39,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 91 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=894, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 20:21:39,876 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 1160 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1163 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:21:39,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1163 Valid, 924 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 20:21:39,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-12-13 20:21:39,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 157. [2022-12-13 20:21:39,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 133 states have (on average 1.2481203007518797) internal successors, (166), 147 states have internal predecessors, (166), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:21:39,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 180 transitions. [2022-12-13 20:21:39,879 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 180 transitions. Word has length 47 [2022-12-13 20:21:39,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:21:39,880 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 180 transitions. [2022-12-13 20:21:39,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:21:39,880 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 180 transitions. [2022-12-13 20:21:39,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-13 20:21:39,880 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:21:39,880 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:21:39,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 20:21:40,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:21:40,082 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:21:40,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:21:40,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1571491564, now seen corresponding path program 1 times [2022-12-13 20:21:40,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:21:40,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063712187] [2022-12-13 20:21:40,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:40,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:21:40,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:40,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:21:40,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:40,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 20:21:40,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:40,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 20:21:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:40,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 20:21:40,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:40,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:40,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:21:40,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063712187] [2022-12-13 20:21:40,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063712187] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:21:40,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:21:40,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 20:21:40,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102296567] [2022-12-13 20:21:40,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:21:40,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:21:40,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:21:40,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:21:40,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:21:40,140 INFO L87 Difference]: Start difference. First operand 157 states and 180 transitions. Second operand has 5 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:21:40,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:21:40,183 INFO L93 Difference]: Finished difference Result 156 states and 179 transitions. [2022-12-13 20:21:40,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:21:40,183 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 47 [2022-12-13 20:21:40,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:21:40,185 INFO L225 Difference]: With dead ends: 156 [2022-12-13 20:21:40,185 INFO L226 Difference]: Without dead ends: 156 [2022-12-13 20:21:40,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:21:40,186 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 62 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:21:40,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 193 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:21:40,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-12-13 20:21:40,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2022-12-13 20:21:40,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 133 states have (on average 1.2406015037593985) internal successors, (165), 146 states have internal predecessors, (165), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:21:40,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 179 transitions. [2022-12-13 20:21:40,192 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 179 transitions. Word has length 47 [2022-12-13 20:21:40,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:21:40,192 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 179 transitions. [2022-12-13 20:21:40,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:21:40,192 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 179 transitions. [2022-12-13 20:21:40,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-13 20:21:40,193 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:21:40,193 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:21:40,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-13 20:21:40,193 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:21:40,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:21:40,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1571491565, now seen corresponding path program 1 times [2022-12-13 20:21:40,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:21:40,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874530013] [2022-12-13 20:21:40,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:40,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:21:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:40,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:21:40,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:40,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 20:21:40,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:40,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 20:21:40,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:40,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 20:21:40,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:40,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:40,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:21:40,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874530013] [2022-12-13 20:21:40,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874530013] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:21:40,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550220279] [2022-12-13 20:21:40,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:40,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:21:40,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:21:40,297 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:21:40,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 20:21:40,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:40,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 20:21:40,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:21:40,472 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:40,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:21:40,527 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 23 treesize of output 19 [2022-12-13 20:21:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:40,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550220279] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:21:40,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:21:40,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2022-12-13 20:21:40,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133972926] [2022-12-13 20:21:40,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:21:40,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 20:21:40,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:21:40,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 20:21:40,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-12-13 20:21:40,559 INFO L87 Difference]: Start difference. First operand 156 states and 179 transitions. Second operand has 13 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-13 20:21:40,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:21:40,740 INFO L93 Difference]: Finished difference Result 164 states and 187 transitions. [2022-12-13 20:21:40,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 20:21:40,740 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 47 [2022-12-13 20:21:40,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:21:40,741 INFO L225 Difference]: With dead ends: 164 [2022-12-13 20:21:40,741 INFO L226 Difference]: Without dead ends: 164 [2022-12-13 20:21:40,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-12-13 20:21:40,742 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 305 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:21:40,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 223 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:21:40,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-12-13 20:21:40,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2022-12-13 20:21:40,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 137 states have (on average 1.2408759124087592) internal successors, (170), 150 states have internal predecessors, (170), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:21:40,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 184 transitions. [2022-12-13 20:21:40,746 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 184 transitions. Word has length 47 [2022-12-13 20:21:40,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:21:40,747 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 184 transitions. [2022-12-13 20:21:40,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-13 20:21:40,747 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 184 transitions. [2022-12-13 20:21:40,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 20:21:40,747 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:21:40,748 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:21:40,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 20:21:40,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:21:40,948 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:21:40,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:21:40,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1797796267, now seen corresponding path program 1 times [2022-12-13 20:21:40,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:21:40,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038213250] [2022-12-13 20:21:40,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:40,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:21:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:41,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:21:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:41,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 20:21:41,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:41,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 20:21:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:41,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 20:21:41,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:41,047 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 20:21:41,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:21:41,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038213250] [2022-12-13 20:21:41,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038213250] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:21:41,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555516110] [2022-12-13 20:21:41,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:41,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:21:41,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:21:41,049 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:21:41,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 20:21:41,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:41,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 20:21:41,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:21:41,156 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 20:21:41,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:21:41,217 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 20:21:41,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555516110] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:21:41,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:21:41,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 14 [2022-12-13 20:21:41,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757476441] [2022-12-13 20:21:41,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:21:41,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 20:21:41,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:21:41,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 20:21:41,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-12-13 20:21:41,218 INFO L87 Difference]: Start difference. First operand 160 states and 184 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:21:41,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:21:41,439 INFO L93 Difference]: Finished difference Result 381 states and 418 transitions. [2022-12-13 20:21:41,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 20:21:41,439 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2022-12-13 20:21:41,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:21:41,440 INFO L225 Difference]: With dead ends: 381 [2022-12-13 20:21:41,440 INFO L226 Difference]: Without dead ends: 381 [2022-12-13 20:21:41,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 101 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2022-12-13 20:21:41,441 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 914 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 917 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:21:41,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [917 Valid, 734 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:21:41,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-12-13 20:21:41,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 150. [2022-12-13 20:21:41,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 127 states have (on average 1.2283464566929134) internal successors, (156), 140 states have internal predecessors, (156), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:21:41,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 170 transitions. [2022-12-13 20:21:41,446 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 170 transitions. Word has length 51 [2022-12-13 20:21:41,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:21:41,446 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 170 transitions. [2022-12-13 20:21:41,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 13 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:21:41,447 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 170 transitions. [2022-12-13 20:21:41,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 20:21:41,447 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:21:41,447 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:21:41,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 20:21:41,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 20:21:41,648 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:21:41,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:21:41,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1655469456, now seen corresponding path program 1 times [2022-12-13 20:21:41,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:21:41,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668465488] [2022-12-13 20:21:41,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:41,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:21:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:41,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:21:41,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:41,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 20:21:41,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:41,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 20:21:41,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:41,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 20:21:41,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:41,748 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:41,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:21:41,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668465488] [2022-12-13 20:21:41,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668465488] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:21:41,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994911708] [2022-12-13 20:21:41,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:41,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:21:41,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:21:41,749 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:21:41,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 20:21:41,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:41,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 20:21:41,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:21:41,867 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:41,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:21:41,924 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:41,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994911708] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:21:41,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:21:41,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 13 [2022-12-13 20:21:41,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365537167] [2022-12-13 20:21:41,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:21:41,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 20:21:41,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:21:41,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 20:21:41,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-12-13 20:21:41,925 INFO L87 Difference]: Start difference. First operand 150 states and 170 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:21:42,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:21:42,073 INFO L93 Difference]: Finished difference Result 262 states and 292 transitions. [2022-12-13 20:21:42,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 20:21:42,073 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2022-12-13 20:21:42,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:21:42,075 INFO L225 Difference]: With dead ends: 262 [2022-12-13 20:21:42,075 INFO L226 Difference]: Without dead ends: 262 [2022-12-13 20:21:42,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 102 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-12-13 20:21:42,076 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 235 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:21:42,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 503 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:21:42,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-12-13 20:21:42,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 155. [2022-12-13 20:21:42,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 132 states have (on average 1.2196969696969697) internal successors, (161), 145 states have internal predecessors, (161), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:21:42,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 175 transitions. [2022-12-13 20:21:42,079 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 175 transitions. Word has length 51 [2022-12-13 20:21:42,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:21:42,079 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 175 transitions. [2022-12-13 20:21:42,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:21:42,079 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 175 transitions. [2022-12-13 20:21:42,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-13 20:21:42,080 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:21:42,080 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2022-12-13 20:21:42,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 20:21:42,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 20:21:42,281 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:21:42,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:21:42,281 INFO L85 PathProgramCache]: Analyzing trace with hash 772147598, now seen corresponding path program 2 times [2022-12-13 20:21:42,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:21:42,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154461616] [2022-12-13 20:21:42,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:42,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:21:42,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:42,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:21:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:42,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 20:21:42,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:42,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 20:21:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:42,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 20:21:42,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:42,467 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:42,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:21:42,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154461616] [2022-12-13 20:21:42,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154461616] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:21:42,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483311049] [2022-12-13 20:21:42,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:21:42,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:21:42,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:21:42,469 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:21:42,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 20:21:42,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:21:42,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:21:42,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 20:21:42,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:21:42,675 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:42,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:21:42,762 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 25 treesize of output 21 [2022-12-13 20:21:42,863 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:42,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483311049] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:21:42,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:21:42,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 30 [2022-12-13 20:21:42,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486187932] [2022-12-13 20:21:42,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:21:42,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 20:21:42,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:21:42,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 20:21:42,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2022-12-13 20:21:42,864 INFO L87 Difference]: Start difference. First operand 155 states and 175 transitions. Second operand has 31 states, 30 states have (on average 3.2) internal successors, (96), 30 states have internal predecessors, (96), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-13 20:21:43,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:21:43,406 INFO L93 Difference]: Finished difference Result 282 states and 307 transitions. [2022-12-13 20:21:43,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 20:21:43,407 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.2) internal successors, (96), 30 states have internal predecessors, (96), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 52 [2022-12-13 20:21:43,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:21:43,407 INFO L225 Difference]: With dead ends: 282 [2022-12-13 20:21:43,407 INFO L226 Difference]: Without dead ends: 282 [2022-12-13 20:21:43,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=1398, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 20:21:43,408 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 907 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 20:21:43,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [907 Valid, 1042 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 20:21:43,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-12-13 20:21:43,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 159. [2022-12-13 20:21:43,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 136 states have (on average 1.2205882352941178) internal successors, (166), 149 states have internal predecessors, (166), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:21:43,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 180 transitions. [2022-12-13 20:21:43,411 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 180 transitions. Word has length 52 [2022-12-13 20:21:43,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:21:43,411 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 180 transitions. [2022-12-13 20:21:43,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.2) internal successors, (96), 30 states have internal predecessors, (96), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-13 20:21:43,411 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 180 transitions. [2022-12-13 20:21:43,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-13 20:21:43,412 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:21:43,412 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-13 20:21:43,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 20:21:43,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 20:21:43,613 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:21:43,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:21:43,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1833228231, now seen corresponding path program 1 times [2022-12-13 20:21:43,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:21:43,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079442130] [2022-12-13 20:21:43,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:43,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:21:43,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:43,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:21:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:43,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 20:21:43,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:43,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 20:21:43,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:43,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 20:21:43,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:43,817 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:43,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:21:43,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079442130] [2022-12-13 20:21:43,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079442130] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:21:43,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255001692] [2022-12-13 20:21:43,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:43,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:21:43,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:21:43,818 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:21:43,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 20:21:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:43,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 20:21:43,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:21:44,120 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:44,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:21:44,323 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:44,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255001692] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:21:44,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:21:44,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-12-13 20:21:44,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849498092] [2022-12-13 20:21:44,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:21:44,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 20:21:44,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:21:44,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 20:21:44,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2022-12-13 20:21:44,326 INFO L87 Difference]: Start difference. First operand 159 states and 180 transitions. Second operand has 32 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 31 states have internal predecessors, (88), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 7 states have call successors, (10) [2022-12-13 20:21:44,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:21:44,883 INFO L93 Difference]: Finished difference Result 290 states and 321 transitions. [2022-12-13 20:21:44,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-13 20:21:44,884 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 31 states have internal predecessors, (88), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 7 states have call successors, (10) Word has length 53 [2022-12-13 20:21:44,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:21:44,885 INFO L225 Difference]: With dead ends: 290 [2022-12-13 20:21:44,885 INFO L226 Difference]: Without dead ends: 290 [2022-12-13 20:21:44,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=515, Invalid=1935, Unknown=0, NotChecked=0, Total=2450 [2022-12-13 20:21:44,887 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 734 mSDsluCounter, 1106 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 1205 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:21:44,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [734 Valid, 1205 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 20:21:44,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-12-13 20:21:44,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 194. [2022-12-13 20:21:44,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 171 states have (on average 1.1754385964912282) internal successors, (201), 184 states have internal predecessors, (201), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:21:44,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 215 transitions. [2022-12-13 20:21:44,890 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 215 transitions. Word has length 53 [2022-12-13 20:21:44,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:21:44,891 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 215 transitions. [2022-12-13 20:21:44,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 3.0344827586206895) internal successors, (88), 31 states have internal predecessors, (88), 7 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 4 states have call predecessors, (10), 7 states have call successors, (10) [2022-12-13 20:21:44,891 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 215 transitions. [2022-12-13 20:21:44,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-13 20:21:44,891 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:21:44,891 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:21:44,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-13 20:21:45,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 20:21:45,092 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:21:45,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:21:45,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1768212551, now seen corresponding path program 1 times [2022-12-13 20:21:45,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:21:45,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586694779] [2022-12-13 20:21:45,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:45,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:21:45,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:45,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:21:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:45,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 20:21:45,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:45,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 20:21:45,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:45,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 20:21:45,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:45,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 20:21:45,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:21:45,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586694779] [2022-12-13 20:21:45,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586694779] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:21:45,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:21:45,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 20:21:45,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193352271] [2022-12-13 20:21:45,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:21:45,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:21:45,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:21:45,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:21:45,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:21:45,143 INFO L87 Difference]: Start difference. First operand 194 states and 215 transitions. Second operand has 5 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 20:21:45,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:21:45,194 INFO L93 Difference]: Finished difference Result 193 states and 214 transitions. [2022-12-13 20:21:45,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:21:45,195 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 53 [2022-12-13 20:21:45,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:21:45,196 INFO L225 Difference]: With dead ends: 193 [2022-12-13 20:21:45,196 INFO L226 Difference]: Without dead ends: 193 [2022-12-13 20:21:45,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:21:45,197 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 108 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:21:45,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 145 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:21:45,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-12-13 20:21:45,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2022-12-13 20:21:45,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 171 states have (on average 1.1695906432748537) internal successors, (200), 183 states have internal predecessors, (200), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:21:45,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 214 transitions. [2022-12-13 20:21:45,202 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 214 transitions. Word has length 53 [2022-12-13 20:21:45,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:21:45,202 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 214 transitions. [2022-12-13 20:21:45,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 20:21:45,202 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 214 transitions. [2022-12-13 20:21:45,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-13 20:21:45,203 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:21:45,203 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2022-12-13 20:21:45,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-12-13 20:21:45,203 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:21:45,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:21:45,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1495879408, now seen corresponding path program 1 times [2022-12-13 20:21:45,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:21:45,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746233742] [2022-12-13 20:21:45,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:45,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:21:45,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:45,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:21:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:45,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 20:21:45,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:45,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-12-13 20:21:45,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:45,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 20:21:45,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:45,344 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 20:21:45,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:21:45,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746233742] [2022-12-13 20:21:45,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746233742] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:21:45,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191323957] [2022-12-13 20:21:45,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:45,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:21:45,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:21:45,345 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:21:45,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 20:21:45,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:45,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 20:21:45,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:21:45,695 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 20:21:45,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:21:45,829 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 20:21:45,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191323957] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:21:45,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:21:45,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-12-13 20:21:45,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687561530] [2022-12-13 20:21:45,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:21:45,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 20:21:45,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:21:45,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 20:21:45,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-12-13 20:21:45,831 INFO L87 Difference]: Start difference. First operand 193 states and 214 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 17 states have internal predecessors, (70), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-13 20:21:46,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:21:46,132 INFO L93 Difference]: Finished difference Result 341 states and 377 transitions. [2022-12-13 20:21:46,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 20:21:46,133 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 17 states have internal predecessors, (70), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 54 [2022-12-13 20:21:46,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:21:46,133 INFO L225 Difference]: With dead ends: 341 [2022-12-13 20:21:46,134 INFO L226 Difference]: Without dead ends: 341 [2022-12-13 20:21:46,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 103 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2022-12-13 20:21:46,134 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 1001 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1004 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:21:46,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1004 Valid, 976 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 20:21:46,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-12-13 20:21:46,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 203. [2022-12-13 20:21:46,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 181 states have (on average 1.1657458563535912) internal successors, (211), 193 states have internal predecessors, (211), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:21:46,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 225 transitions. [2022-12-13 20:21:46,137 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 225 transitions. Word has length 54 [2022-12-13 20:21:46,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:21:46,138 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 225 transitions. [2022-12-13 20:21:46,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 17 states have internal predecessors, (70), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-12-13 20:21:46,138 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 225 transitions. [2022-12-13 20:21:46,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-13 20:21:46,138 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:21:46,138 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:21:46,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-13 20:21:46,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:21:46,339 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:21:46,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:21:46,339 INFO L85 PathProgramCache]: Analyzing trace with hash -953582912, now seen corresponding path program 1 times [2022-12-13 20:21:46,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:21:46,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118556317] [2022-12-13 20:21:46,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:46,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:21:46,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:46,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:21:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:46,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 20:21:46,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:46,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 20:21:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:46,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 20:21:46,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:46,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 20:21:46,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:21:46,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118556317] [2022-12-13 20:21:46,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118556317] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:21:46,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:21:46,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 20:21:46,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173726061] [2022-12-13 20:21:46,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:21:46,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 20:21:46,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:21:46,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 20:21:46,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 20:21:46,378 INFO L87 Difference]: Start difference. First operand 203 states and 225 transitions. Second operand has 5 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 20:21:46,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:21:46,421 INFO L93 Difference]: Finished difference Result 202 states and 224 transitions. [2022-12-13 20:21:46,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:21:46,421 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2022-12-13 20:21:46,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:21:46,422 INFO L225 Difference]: With dead ends: 202 [2022-12-13 20:21:46,422 INFO L226 Difference]: Without dead ends: 202 [2022-12-13 20:21:46,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:21:46,422 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 102 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:21:46,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 151 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:21:46,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-12-13 20:21:46,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2022-12-13 20:21:46,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 181 states have (on average 1.160220994475138) internal successors, (210), 192 states have internal predecessors, (210), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:21:46,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 224 transitions. [2022-12-13 20:21:46,425 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 224 transitions. Word has length 56 [2022-12-13 20:21:46,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:21:46,425 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 224 transitions. [2022-12-13 20:21:46,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 20:21:46,425 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 224 transitions. [2022-12-13 20:21:46,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-13 20:21:46,426 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:21:46,426 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:21:46,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-12-13 20:21:46,426 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:21:46,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:21:46,426 INFO L85 PathProgramCache]: Analyzing trace with hash 841059847, now seen corresponding path program 1 times [2022-12-13 20:21:46,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:21:46,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354168309] [2022-12-13 20:21:46,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:46,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:21:46,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:46,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:21:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:46,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 20:21:46,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:46,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-12-13 20:21:46,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:46,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 20:21:46,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:46,656 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 20:21:46,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:21:46,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354168309] [2022-12-13 20:21:46,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354168309] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:21:46,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983781425] [2022-12-13 20:21:46,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:46,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:21:46,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:21:46,658 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:21:46,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 20:21:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:46,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-13 20:21:46,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:21:47,018 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 20:21:47,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:21:47,167 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 42 treesize of output 38 [2022-12-13 20:21:47,507 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 20:21:47,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983781425] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:21:47,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:21:47,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 36 [2022-12-13 20:21:47,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101253309] [2022-12-13 20:21:47,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:21:47,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-13 20:21:47,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:21:47,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-13 20:21:47,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1201, Unknown=0, NotChecked=0, Total=1332 [2022-12-13 20:21:47,510 INFO L87 Difference]: Start difference. First operand 202 states and 224 transitions. Second operand has 37 states, 36 states have (on average 2.9722222222222223) internal successors, (107), 36 states have internal predecessors, (107), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-13 20:21:50,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:21:50,685 INFO L93 Difference]: Finished difference Result 598 states and 646 transitions. [2022-12-13 20:21:50,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-13 20:21:50,686 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.9722222222222223) internal successors, (107), 36 states have internal predecessors, (107), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 56 [2022-12-13 20:21:50,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:21:50,687 INFO L225 Difference]: With dead ends: 598 [2022-12-13 20:21:50,687 INFO L226 Difference]: Without dead ends: 598 [2022-12-13 20:21:50,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1367 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1641, Invalid=5841, Unknown=0, NotChecked=0, Total=7482 [2022-12-13 20:21:50,688 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 2038 mSDsluCounter, 1479 mSDsCounter, 0 mSdLazyCounter, 2602 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2039 SdHoareTripleChecker+Valid, 1592 SdHoareTripleChecker+Invalid, 2644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:21:50,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2039 Valid, 1592 Invalid, 2644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2602 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-13 20:21:50,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-12-13 20:21:50,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 202. [2022-12-13 20:21:50,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 183 states have (on average 1.1530054644808743) internal successors, (211), 192 states have internal predecessors, (211), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:21:50,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 225 transitions. [2022-12-13 20:21:50,692 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 225 transitions. Word has length 56 [2022-12-13 20:21:50,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:21:50,692 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 225 transitions. [2022-12-13 20:21:50,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.9722222222222223) internal successors, (107), 36 states have internal predecessors, (107), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-13 20:21:50,692 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 225 transitions. [2022-12-13 20:21:50,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-13 20:21:50,692 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:21:50,693 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:21:50,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-13 20:21:50,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-13 20:21:50,894 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:21:50,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:21:50,894 INFO L85 PathProgramCache]: Analyzing trace with hash 503701003, now seen corresponding path program 1 times [2022-12-13 20:21:50,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:21:50,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878227571] [2022-12-13 20:21:50,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:50,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:21:50,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:50,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:21:51,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:51,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 20:21:51,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:51,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 20:21:51,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:51,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 20:21:51,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:51,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 20:21:51,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:21:51,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878227571] [2022-12-13 20:21:51,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878227571] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:21:51,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:21:51,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 20:21:51,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454200640] [2022-12-13 20:21:51,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:21:51,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 20:21:51,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:21:51,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 20:21:51,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:21:51,011 INFO L87 Difference]: Start difference. First operand 202 states and 225 transitions. Second operand has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 20:21:51,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:21:51,082 INFO L93 Difference]: Finished difference Result 201 states and 224 transitions. [2022-12-13 20:21:51,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 20:21:51,083 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 57 [2022-12-13 20:21:51,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:21:51,084 INFO L225 Difference]: With dead ends: 201 [2022-12-13 20:21:51,084 INFO L226 Difference]: Without dead ends: 201 [2022-12-13 20:21:51,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-12-13 20:21:51,084 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 148 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:21:51,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 140 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:21:51,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-12-13 20:21:51,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-12-13 20:21:51,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 183 states have (on average 1.1475409836065573) internal successors, (210), 191 states have internal predecessors, (210), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:21:51,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 224 transitions. [2022-12-13 20:21:51,087 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 224 transitions. Word has length 57 [2022-12-13 20:21:51,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:21:51,087 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 224 transitions. [2022-12-13 20:21:51,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 20:21:51,087 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 224 transitions. [2022-12-13 20:21:51,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-13 20:21:51,088 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:21:51,088 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:21:51,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-12-13 20:21:51,088 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:21:51,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:21:51,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1565137885, now seen corresponding path program 1 times [2022-12-13 20:21:51,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:21:51,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609756535] [2022-12-13 20:21:51,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:51,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:21:51,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:51,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:21:51,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:51,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-12-13 20:21:51,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:51,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-12-13 20:21:51,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:51,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-12-13 20:21:51,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 20:21:51,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:21:51,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609756535] [2022-12-13 20:21:51,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609756535] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:21:51,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:21:51,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 20:21:51,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114450269] [2022-12-13 20:21:51,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:21:51,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 20:21:51,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:21:51,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 20:21:51,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-13 20:21:51,248 INFO L87 Difference]: Start difference. First operand 201 states and 224 transitions. Second operand has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 20:21:51,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:21:51,395 INFO L93 Difference]: Finished difference Result 200 states and 223 transitions. [2022-12-13 20:21:51,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 20:21:51,396 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 58 [2022-12-13 20:21:51,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:21:51,397 INFO L225 Difference]: With dead ends: 200 [2022-12-13 20:21:51,397 INFO L226 Difference]: Without dead ends: 173 [2022-12-13 20:21:51,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-12-13 20:21:51,397 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 93 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:21:51,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 244 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:21:51,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-12-13 20:21:51,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-12-13 20:21:51,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 156 states have (on average 1.1538461538461537) internal successors, (180), 163 states have internal predecessors, (180), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:21:51,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 194 transitions. [2022-12-13 20:21:51,400 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 194 transitions. Word has length 58 [2022-12-13 20:21:51,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:21:51,400 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 194 transitions. [2022-12-13 20:21:51,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 20:21:51,400 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 194 transitions. [2022-12-13 20:21:51,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-13 20:21:51,400 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:21:51,400 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:21:51,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-12-13 20:21:51,400 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:21:51,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:21:51,401 INFO L85 PathProgramCache]: Analyzing trace with hash 804662856, now seen corresponding path program 1 times [2022-12-13 20:21:51,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:21:51,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330606304] [2022-12-13 20:21:51,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:51,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:21:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:51,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:21:51,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:51,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 20:21:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:51,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-12-13 20:21:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:51,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 20:21:51,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:21:51,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:21:51,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330606304] [2022-12-13 20:21:51,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330606304] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:21:51,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275965572] [2022-12-13 20:21:51,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:51,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:21:51,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:21:51,799 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:21:51,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 20:21:51,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:51,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 20:21:51,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:21:52,112 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 20:21:52,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:21:52,244 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 42 treesize of output 38 [2022-12-13 20:21:52,591 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 20:21:52,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275965572] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:21:52,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:21:52,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 41 [2022-12-13 20:21:52,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070217234] [2022-12-13 20:21:52,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:21:52,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-12-13 20:21:52,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:21:52,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-12-13 20:21:52,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1562, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 20:21:52,594 INFO L87 Difference]: Start difference. First operand 173 states and 194 transitions. Second operand has 42 states, 41 states have (on average 2.731707317073171) internal successors, (112), 41 states have internal predecessors, (112), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-13 20:21:57,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:21:57,117 INFO L93 Difference]: Finished difference Result 772 states and 861 transitions. [2022-12-13 20:21:57,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-12-13 20:21:57,117 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.731707317073171) internal successors, (112), 41 states have internal predecessors, (112), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 58 [2022-12-13 20:21:57,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:21:57,118 INFO L225 Difference]: With dead ends: 772 [2022-12-13 20:21:57,118 INFO L226 Difference]: Without dead ends: 772 [2022-12-13 20:21:57,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2187 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2331, Invalid=8175, Unknown=0, NotChecked=0, Total=10506 [2022-12-13 20:21:57,120 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 1854 mSDsluCounter, 1577 mSDsCounter, 0 mSdLazyCounter, 3529 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1855 SdHoareTripleChecker+Valid, 1666 SdHoareTripleChecker+Invalid, 3574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 3529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-13 20:21:57,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1855 Valid, 1666 Invalid, 3574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 3529 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-13 20:21:57,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-12-13 20:21:57,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 198. [2022-12-13 20:21:57,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 182 states have (on average 1.1758241758241759) internal successors, (214), 188 states have internal predecessors, (214), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:21:57,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 228 transitions. [2022-12-13 20:21:57,124 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 228 transitions. Word has length 58 [2022-12-13 20:21:57,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:21:57,124 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 228 transitions. [2022-12-13 20:21:57,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.731707317073171) internal successors, (112), 41 states have internal predecessors, (112), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-13 20:21:57,124 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 228 transitions. [2022-12-13 20:21:57,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-13 20:21:57,124 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:21:57,124 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2022-12-13 20:21:57,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 20:21:57,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:21:57,326 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:21:57,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:21:57,327 INFO L85 PathProgramCache]: Analyzing trace with hash -226038058, now seen corresponding path program 2 times [2022-12-13 20:21:57,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:21:57,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388055852] [2022-12-13 20:21:57,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:57,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:21:57,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:57,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:21:57,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:57,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 20:21:57,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:57,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-12-13 20:21:57,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:57,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 20:21:57,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:57,542 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 20:21:57,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:21:57,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388055852] [2022-12-13 20:21:57,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388055852] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:21:57,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719196490] [2022-12-13 20:21:57,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:21:57,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:21:57,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:21:57,543 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:21:57,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 20:21:57,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:21:57,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:21:57,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 20:21:57,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:21:57,737 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 20:21:57,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:21:57,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-12-13 20:21:57,969 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 20:21:57,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719196490] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:21:57,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:21:57,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 29 [2022-12-13 20:21:57,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053419817] [2022-12-13 20:21:57,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:21:57,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 20:21:57,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:21:57,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 20:21:57,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-12-13 20:21:57,970 INFO L87 Difference]: Start difference. First operand 198 states and 228 transitions. Second operand has 30 states, 29 states have (on average 3.310344827586207) internal successors, (96), 29 states have internal predecessors, (96), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-13 20:21:58,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:21:58,832 INFO L93 Difference]: Finished difference Result 330 states and 373 transitions. [2022-12-13 20:21:58,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 20:21:58,833 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.310344827586207) internal successors, (96), 29 states have internal predecessors, (96), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 59 [2022-12-13 20:21:58,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:21:58,833 INFO L225 Difference]: With dead ends: 330 [2022-12-13 20:21:58,833 INFO L226 Difference]: Without dead ends: 330 [2022-12-13 20:21:58,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 104 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=475, Invalid=1687, Unknown=0, NotChecked=0, Total=2162 [2022-12-13 20:21:58,834 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 645 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 20:21:58,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [645 Valid, 952 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 20:21:58,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-12-13 20:21:58,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 199. [2022-12-13 20:21:58,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 183 states have (on average 1.174863387978142) internal successors, (215), 189 states have internal predecessors, (215), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:21:58,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 229 transitions. [2022-12-13 20:21:58,837 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 229 transitions. Word has length 59 [2022-12-13 20:21:58,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:21:58,837 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 229 transitions. [2022-12-13 20:21:58,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.310344827586207) internal successors, (96), 29 states have internal predecessors, (96), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-12-13 20:21:58,837 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 229 transitions. [2022-12-13 20:21:58,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-13 20:21:58,837 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:21:58,837 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:21:58,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 20:21:59,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:21:59,039 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:21:59,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:21:59,040 INFO L85 PathProgramCache]: Analyzing trace with hash -812323954, now seen corresponding path program 1 times [2022-12-13 20:21:59,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:21:59,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081427076] [2022-12-13 20:21:59,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:59,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:21:59,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:59,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:21:59,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:59,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 20:21:59,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:59,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-12-13 20:21:59,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:59,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 20:21:59,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:59,173 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 20:21:59,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:21:59,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081427076] [2022-12-13 20:21:59,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081427076] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:21:59,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180383040] [2022-12-13 20:21:59,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:59,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:21:59,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:21:59,174 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:21:59,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 20:21:59,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:59,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 20:21:59,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:21:59,260 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:21:59,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 20:21:59,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180383040] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:21:59,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 20:21:59,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [12] total 13 [2022-12-13 20:21:59,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75757857] [2022-12-13 20:21:59,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:21:59,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 20:21:59,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:21:59,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 20:21:59,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-12-13 20:21:59,261 INFO L87 Difference]: Start difference. First operand 199 states and 229 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:21:59,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:21:59,292 INFO L93 Difference]: Finished difference Result 203 states and 231 transitions. [2022-12-13 20:21:59,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 20:21:59,292 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 60 [2022-12-13 20:21:59,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:21:59,292 INFO L225 Difference]: With dead ends: 203 [2022-12-13 20:21:59,292 INFO L226 Difference]: Without dead ends: 203 [2022-12-13 20:21:59,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-12-13 20:21:59,293 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 89 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:21:59,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 234 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:21:59,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-12-13 20:21:59,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 201. [2022-12-13 20:21:59,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 185 states have (on average 1.172972972972973) internal successors, (217), 191 states have internal predecessors, (217), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:21:59,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 231 transitions. [2022-12-13 20:21:59,296 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 231 transitions. Word has length 60 [2022-12-13 20:21:59,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:21:59,296 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 231 transitions. [2022-12-13 20:21:59,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:21:59,296 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 231 transitions. [2022-12-13 20:21:59,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-13 20:21:59,297 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:21:59,297 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:21:59,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-13 20:21:59,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-13 20:21:59,498 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:21:59,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:21:59,499 INFO L85 PathProgramCache]: Analyzing trace with hash 563297452, now seen corresponding path program 1 times [2022-12-13 20:21:59,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:21:59,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161271633] [2022-12-13 20:21:59,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:59,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:21:59,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:59,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:21:59,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:59,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 20:21:59,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:59,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-12-13 20:21:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:59,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 20:21:59,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-13 20:21:59,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:21:59,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161271633] [2022-12-13 20:21:59,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161271633] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:21:59,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217455413] [2022-12-13 20:21:59,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:21:59,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:21:59,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:21:59,602 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:21:59,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-13 20:21:59,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:21:59,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 20:21:59,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:21:59,749 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 20:21:59,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:21:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 20:21:59,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217455413] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:21:59,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:21:59,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 21 [2022-12-13 20:21:59,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028115870] [2022-12-13 20:21:59,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:21:59,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 20:21:59,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:21:59,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 20:21:59,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-12-13 20:21:59,823 INFO L87 Difference]: Start difference. First operand 201 states and 231 transitions. Second operand has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 20 states have internal predecessors, (87), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:22:00,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:22:00,162 INFO L93 Difference]: Finished difference Result 246 states and 277 transitions. [2022-12-13 20:22:00,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 20:22:00,162 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 20 states have internal predecessors, (87), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 62 [2022-12-13 20:22:00,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:22:00,163 INFO L225 Difference]: With dead ends: 246 [2022-12-13 20:22:00,163 INFO L226 Difference]: Without dead ends: 246 [2022-12-13 20:22:00,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=247, Invalid=943, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 20:22:00,163 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 403 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:22:00,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 884 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 20:22:00,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-12-13 20:22:00,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 201. [2022-12-13 20:22:00,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 185 states have (on average 1.1675675675675676) internal successors, (216), 191 states have internal predecessors, (216), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:22:00,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 230 transitions. [2022-12-13 20:22:00,166 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 230 transitions. Word has length 62 [2022-12-13 20:22:00,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:22:00,166 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 230 transitions. [2022-12-13 20:22:00,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.142857142857143) internal successors, (87), 20 states have internal predecessors, (87), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:22:00,167 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 230 transitions. [2022-12-13 20:22:00,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-13 20:22:00,167 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:22:00,167 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2022-12-13 20:22:00,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-13 20:22:00,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-13 20:22:00,368 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:22:00,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:22:00,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1697403066, now seen corresponding path program 1 times [2022-12-13 20:22:00,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:22:00,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090598061] [2022-12-13 20:22:00,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:22:00,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:22:00,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:00,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:22:00,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:00,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 20:22:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:00,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-12-13 20:22:00,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:00,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 20:22:00,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:00,541 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 35 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 20:22:00,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:22:00,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090598061] [2022-12-13 20:22:00,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090598061] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:22:00,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60126304] [2022-12-13 20:22:00,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:22:00,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:22:00,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:22:00,542 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:22:00,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-13 20:22:00,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:00,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 20:22:00,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:22:00,753 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 20:22:00,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:22:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 41 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 20:22:00,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60126304] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:22:00,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:22:00,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 23 [2022-12-13 20:22:00,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404740670] [2022-12-13 20:22:00,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:22:00,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 20:22:00,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:22:00,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 20:22:00,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-12-13 20:22:00,857 INFO L87 Difference]: Start difference. First operand 201 states and 230 transitions. Second operand has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 22 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:22:01,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:22:01,484 INFO L93 Difference]: Finished difference Result 514 states and 595 transitions. [2022-12-13 20:22:01,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 20:22:01,484 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 22 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 63 [2022-12-13 20:22:01,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:22:01,485 INFO L225 Difference]: With dead ends: 514 [2022-12-13 20:22:01,485 INFO L226 Difference]: Without dead ends: 514 [2022-12-13 20:22:01,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 119 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=361, Invalid=1619, Unknown=0, NotChecked=0, Total=1980 [2022-12-13 20:22:01,486 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 829 mSDsluCounter, 1197 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 1319 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 20:22:01,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [832 Valid, 1319 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 20:22:01,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-12-13 20:22:01,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 242. [2022-12-13 20:22:01,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 226 states have (on average 1.1902654867256637) internal successors, (269), 232 states have internal predecessors, (269), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:22:01,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 283 transitions. [2022-12-13 20:22:01,490 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 283 transitions. Word has length 63 [2022-12-13 20:22:01,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:22:01,490 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 283 transitions. [2022-12-13 20:22:01,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.6956521739130435) internal successors, (85), 22 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:22:01,490 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 283 transitions. [2022-12-13 20:22:01,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-13 20:22:01,490 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:22:01,490 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:22:01,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-13 20:22:01,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-13 20:22:01,691 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:22:01,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:22:01,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1085543347, now seen corresponding path program 1 times [2022-12-13 20:22:01,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:22:01,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344200734] [2022-12-13 20:22:01,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:22:01,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:22:01,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:01,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:22:01,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:01,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 20:22:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:01,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-12-13 20:22:01,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:01,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 20:22:01,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:01,809 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 20:22:01,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:22:01,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344200734] [2022-12-13 20:22:01,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344200734] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:22:01,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931105695] [2022-12-13 20:22:01,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:22:01,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:22:01,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:22:01,811 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:22:01,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-13 20:22:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:01,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 20:22:01,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:22:01,951 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 20:22:01,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:22:02,029 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 20:22:02,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931105695] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:22:02,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:22:02,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 14 [2022-12-13 20:22:02,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94424964] [2022-12-13 20:22:02,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:22:02,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 20:22:02,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:22:02,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 20:22:02,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-12-13 20:22:02,030 INFO L87 Difference]: Start difference. First operand 242 states and 283 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:22:02,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:22:02,309 INFO L93 Difference]: Finished difference Result 381 states and 442 transitions. [2022-12-13 20:22:02,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 20:22:02,309 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 63 [2022-12-13 20:22:02,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:22:02,310 INFO L225 Difference]: With dead ends: 381 [2022-12-13 20:22:02,310 INFO L226 Difference]: Without dead ends: 381 [2022-12-13 20:22:02,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 123 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2022-12-13 20:22:02,310 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 270 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:22:02,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 604 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 20:22:02,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-12-13 20:22:02,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 244. [2022-12-13 20:22:02,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 228 states have (on average 1.1885964912280702) internal successors, (271), 234 states have internal predecessors, (271), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:22:02,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 285 transitions. [2022-12-13 20:22:02,315 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 285 transitions. Word has length 63 [2022-12-13 20:22:02,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:22:02,316 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 285 transitions. [2022-12-13 20:22:02,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:22:02,316 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 285 transitions. [2022-12-13 20:22:02,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-13 20:22:02,316 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:22:02,316 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:22:02,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-13 20:22:02,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-13 20:22:02,518 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:22:02,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:22:02,519 INFO L85 PathProgramCache]: Analyzing trace with hash -593864845, now seen corresponding path program 1 times [2022-12-13 20:22:02,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:22:02,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408091154] [2022-12-13 20:22:02,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:22:02,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:22:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:02,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:22:02,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:02,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 20:22:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:02,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-12-13 20:22:02,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:02,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 20:22:02,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:02,677 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 20:22:02,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:22:02,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408091154] [2022-12-13 20:22:02,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408091154] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:22:02,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467328517] [2022-12-13 20:22:02,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:22:02,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:22:02,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:22:02,679 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:22:02,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-13 20:22:02,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:02,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 20:22:02,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:22:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 20:22:02,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:22:02,943 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 20:22:02,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467328517] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:22:02,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:22:02,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 19 [2022-12-13 20:22:02,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953117335] [2022-12-13 20:22:02,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:22:02,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 20:22:02,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:22:02,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 20:22:02,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-12-13 20:22:02,944 INFO L87 Difference]: Start difference. First operand 244 states and 285 transitions. Second operand has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:22:03,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:22:03,372 INFO L93 Difference]: Finished difference Result 393 states and 457 transitions. [2022-12-13 20:22:03,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 20:22:03,373 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 65 [2022-12-13 20:22:03,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:22:03,374 INFO L225 Difference]: With dead ends: 393 [2022-12-13 20:22:03,374 INFO L226 Difference]: Without dead ends: 393 [2022-12-13 20:22:03,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2022-12-13 20:22:03,374 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 215 mSDsluCounter, 1196 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 1294 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 20:22:03,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 1294 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 20:22:03,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-12-13 20:22:03,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 262. [2022-12-13 20:22:03,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 246 states have (on average 1.1829268292682926) internal successors, (291), 252 states have internal predecessors, (291), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:22:03,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 305 transitions. [2022-12-13 20:22:03,378 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 305 transitions. Word has length 65 [2022-12-13 20:22:03,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:22:03,378 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 305 transitions. [2022-12-13 20:22:03,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.473684210526316) internal successors, (104), 18 states have internal predecessors, (104), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:22:03,378 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 305 transitions. [2022-12-13 20:22:03,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-13 20:22:03,379 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:22:03,379 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:22:03,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-13 20:22:03,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:22:03,580 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:22:03,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:22:03,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1577858453, now seen corresponding path program 2 times [2022-12-13 20:22:03,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:22:03,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965333446] [2022-12-13 20:22:03,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:22:03,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:22:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:03,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:22:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:03,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 20:22:03,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:03,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-12-13 20:22:03,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:03,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 20:22:03,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:03,793 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 20:22:03,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:22:03,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965333446] [2022-12-13 20:22:03,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965333446] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:22:03,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198117674] [2022-12-13 20:22:03,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:22:03,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:22:03,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:22:03,794 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:22:03,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-13 20:22:03,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:22:03,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:22:03,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 20:22:03,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:22:04,145 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-13 20:22:04,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:22:04,235 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 29 treesize of output 25 [2022-12-13 20:22:04,372 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-13 20:22:04,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198117674] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:22:04,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:22:04,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 33 [2022-12-13 20:22:04,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811133360] [2022-12-13 20:22:04,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:22:04,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 20:22:04,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:22:04,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 20:22:04,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 20:22:04,374 INFO L87 Difference]: Start difference. First operand 262 states and 305 transitions. Second operand has 34 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 33 states have internal predecessors, (104), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-13 20:22:06,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:22:06,692 INFO L93 Difference]: Finished difference Result 563 states and 649 transitions. [2022-12-13 20:22:06,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-13 20:22:06,693 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 33 states have internal predecessors, (104), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 67 [2022-12-13 20:22:06,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:22:06,694 INFO L225 Difference]: With dead ends: 563 [2022-12-13 20:22:06,694 INFO L226 Difference]: Without dead ends: 563 [2022-12-13 20:22:06,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1267, Invalid=3989, Unknown=0, NotChecked=0, Total=5256 [2022-12-13 20:22:06,694 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 1099 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 1592 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1099 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 1604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 20:22:06,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1099 Valid, 938 Invalid, 1604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1592 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-13 20:22:06,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-12-13 20:22:06,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 285. [2022-12-13 20:22:06,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 269 states have (on average 1.1933085501858736) internal successors, (321), 275 states have internal predecessors, (321), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:22:06,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 335 transitions. [2022-12-13 20:22:06,699 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 335 transitions. Word has length 67 [2022-12-13 20:22:06,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:22:06,699 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 335 transitions. [2022-12-13 20:22:06,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.1515151515151514) internal successors, (104), 33 states have internal predecessors, (104), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-13 20:22:06,700 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 335 transitions. [2022-12-13 20:22:06,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-13 20:22:06,700 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:22:06,700 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2022-12-13 20:22:06,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-12-13 20:22:06,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:22:06,901 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:22:06,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:22:06,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1797398521, now seen corresponding path program 1 times [2022-12-13 20:22:06,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:22:06,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927612211] [2022-12-13 20:22:06,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:22:06,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:22:06,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:07,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:22:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:07,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 20:22:07,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:07,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-12-13 20:22:07,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:07,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 20:22:07,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:07,093 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-13 20:22:07,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:22:07,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927612211] [2022-12-13 20:22:07,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927612211] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:22:07,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103825034] [2022-12-13 20:22:07,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:22:07,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:22:07,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:22:07,094 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:22:07,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-13 20:22:07,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:07,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 20:22:07,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:22:07,296 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 38 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 20:22:07,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:22:07,408 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 3 proven. 50 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 20:22:07,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103825034] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:22:07,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:22:07,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 25 [2022-12-13 20:22:07,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607130650] [2022-12-13 20:22:07,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:22:07,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 20:22:07,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:22:07,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 20:22:07,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-12-13 20:22:07,410 INFO L87 Difference]: Start difference. First operand 285 states and 335 transitions. Second operand has 25 states, 25 states have (on average 4.04) internal successors, (101), 24 states have internal predecessors, (101), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:22:07,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:22:07,789 INFO L93 Difference]: Finished difference Result 519 states and 599 transitions. [2022-12-13 20:22:07,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-13 20:22:07,789 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.04) internal successors, (101), 24 states have internal predecessors, (101), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 71 [2022-12-13 20:22:07,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:22:07,790 INFO L225 Difference]: With dead ends: 519 [2022-12-13 20:22:07,790 INFO L226 Difference]: Without dead ends: 519 [2022-12-13 20:22:07,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 135 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=307, Invalid=1499, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 20:22:07,791 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 883 mSDsluCounter, 1249 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 1373 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:22:07,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [886 Valid, 1373 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 20:22:07,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-12-13 20:22:07,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 268. [2022-12-13 20:22:07,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 252 states have (on average 1.1746031746031746) internal successors, (296), 258 states have internal predecessors, (296), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:22:07,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 310 transitions. [2022-12-13 20:22:07,794 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 310 transitions. Word has length 71 [2022-12-13 20:22:07,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:22:07,795 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 310 transitions. [2022-12-13 20:22:07,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.04) internal successors, (101), 24 states have internal predecessors, (101), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:22:07,795 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 310 transitions. [2022-12-13 20:22:07,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-13 20:22:07,795 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:22:07,795 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:22:07,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-12-13 20:22:07,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:22:07,996 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:22:07,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:22:07,996 INFO L85 PathProgramCache]: Analyzing trace with hash 2098065761, now seen corresponding path program 1 times [2022-12-13 20:22:07,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:22:07,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114664327] [2022-12-13 20:22:07,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:22:07,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:22:08,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:09,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:22:09,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:09,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 20:22:09,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:09,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-12-13 20:22:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:09,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 20:22:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:10,007 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 20:22:10,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:22:10,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114664327] [2022-12-13 20:22:10,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114664327] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:22:10,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459107727] [2022-12-13 20:22:10,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:22:10,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:22:10,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:22:10,009 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:22:10,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-13 20:22:10,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:10,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 81 conjunts are in the unsatisfiable core [2022-12-13 20:22:10,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:22:10,544 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 16 treesize of output 12 [2022-12-13 20:22:10,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 20:22:10,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2022-12-13 20:22:10,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 20:22:11,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 20:22:11,142 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:22:11,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:22:11,191 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 36 treesize of output 32 [2022-12-13 20:22:11,568 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 22 treesize of output 20 [2022-12-13 20:22:11,570 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 33 treesize of output 24 [2022-12-13 20:22:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 20:22:12,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459107727] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:22:12,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:22:12,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25, 21] total 64 [2022-12-13 20:22:12,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695095860] [2022-12-13 20:22:12,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:22:12,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-12-13 20:22:12,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:22:12,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-12-13 20:22:12,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=3813, Unknown=0, NotChecked=0, Total=4032 [2022-12-13 20:22:12,110 INFO L87 Difference]: Start difference. First operand 268 states and 310 transitions. Second operand has 64 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-13 20:22:28,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:22:28,308 INFO L93 Difference]: Finished difference Result 471 states and 539 transitions. [2022-12-13 20:22:28,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-12-13 20:22:28,312 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 72 [2022-12-13 20:22:28,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:22:28,313 INFO L225 Difference]: With dead ends: 471 [2022-12-13 20:22:28,313 INFO L226 Difference]: Without dead ends: 471 [2022-12-13 20:22:28,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 121 SyntacticMatches, 3 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4434 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=1844, Invalid=17616, Unknown=0, NotChecked=0, Total=19460 [2022-12-13 20:22:28,314 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 1351 mSDsluCounter, 1761 mSDsCounter, 0 mSdLazyCounter, 4337 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1351 SdHoareTripleChecker+Valid, 1816 SdHoareTripleChecker+Invalid, 4412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 4337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-12-13 20:22:28,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1351 Valid, 1816 Invalid, 4412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 4337 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-12-13 20:22:28,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-12-13 20:22:28,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 273. [2022-12-13 20:22:28,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 257 states have (on average 1.171206225680934) internal successors, (301), 263 states have internal predecessors, (301), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:22:28,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 315 transitions. [2022-12-13 20:22:28,318 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 315 transitions. Word has length 72 [2022-12-13 20:22:28,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:22:28,318 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 315 transitions. [2022-12-13 20:22:28,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 62 states have (on average 2.3870967741935485) internal successors, (148), 62 states have internal predecessors, (148), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-13 20:22:28,318 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 315 transitions. [2022-12-13 20:22:28,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-13 20:22:28,319 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:22:28,319 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1] [2022-12-13 20:22:28,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-13 20:22:28,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:22:28,521 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:22:28,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:22:28,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1879843590, now seen corresponding path program 2 times [2022-12-13 20:22:28,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:22:28,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872135118] [2022-12-13 20:22:28,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:22:28,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:22:28,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:28,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:22:28,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:28,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 20:22:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:28,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-12-13 20:22:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:28,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 20:22:28,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 52 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 20:22:28,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:22:28,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872135118] [2022-12-13 20:22:28,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872135118] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:22:28,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008563603] [2022-12-13 20:22:28,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:22:28,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:22:28,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:22:28,809 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:22:28,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-13 20:22:28,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:22:28,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:22:28,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 20:22:28,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:22:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 60 proven. 30 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 20:22:29,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:22:29,284 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 25 treesize of output 21 [2022-12-13 20:22:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 60 proven. 30 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 20:22:29,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008563603] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:22:29,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:22:29,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 42 [2022-12-13 20:22:29,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288556469] [2022-12-13 20:22:29,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:22:29,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-13 20:22:29,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:22:29,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-13 20:22:29,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1529, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 20:22:29,521 INFO L87 Difference]: Start difference. First operand 273 states and 315 transitions. Second operand has 43 states, 42 states have (on average 3.738095238095238) internal successors, (157), 42 states have internal predecessors, (157), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-13 20:22:30,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:22:30,624 INFO L93 Difference]: Finished difference Result 410 states and 463 transitions. [2022-12-13 20:22:30,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-13 20:22:30,624 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 3.738095238095238) internal successors, (157), 42 states have internal predecessors, (157), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 73 [2022-12-13 20:22:30,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:22:30,625 INFO L225 Difference]: With dead ends: 410 [2022-12-13 20:22:30,625 INFO L226 Difference]: Without dead ends: 410 [2022-12-13 20:22:30,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=839, Invalid=2821, Unknown=0, NotChecked=0, Total=3660 [2022-12-13 20:22:30,626 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 915 mSDsluCounter, 1159 mSDsCounter, 0 mSdLazyCounter, 1532 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 915 SdHoareTripleChecker+Valid, 1274 SdHoareTripleChecker+Invalid, 1538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 20:22:30,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [915 Valid, 1274 Invalid, 1538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1532 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 20:22:30,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-12-13 20:22:30,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 277. [2022-12-13 20:22:30,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 261 states have (on average 1.1724137931034482) internal successors, (306), 267 states have internal predecessors, (306), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-13 20:22:30,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 320 transitions. [2022-12-13 20:22:30,629 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 320 transitions. Word has length 73 [2022-12-13 20:22:30,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:22:30,629 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 320 transitions. [2022-12-13 20:22:30,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 3.738095238095238) internal successors, (157), 42 states have internal predecessors, (157), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-13 20:22:30,629 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 320 transitions. [2022-12-13 20:22:30,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-13 20:22:30,630 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:22:30,630 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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] [2022-12-13 20:22:30,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-13 20:22:30,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:22:30,831 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:22:30,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:22:30,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1854390861, now seen corresponding path program 3 times [2022-12-13 20:22:30,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:22:30,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688899827] [2022-12-13 20:22:30,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:22:30,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:22:30,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:31,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:22:31,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:31,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 20:22:31,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:31,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-12-13 20:22:31,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:31,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 20:22:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:22:31,126 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 38 proven. 54 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 20:22:31,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:22:31,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688899827] [2022-12-13 20:22:31,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688899827] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:22:31,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294643658] [2022-12-13 20:22:31,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:22:31,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:22:31,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:22:31,128 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:22:31,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-13 20:22:31,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 20:22:31,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:22:31,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 20:22:31,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:22:31,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 20:22:32,081 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 [2022-12-13 20:22:32,444 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-12-13 20:22:32,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:22:33,171 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-13 20:22:33,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294643658] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:22:33,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:22:33,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 18] total 49 [2022-12-13 20:22:33,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636832536] [2022-12-13 20:22:33,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:22:33,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-13 20:22:33,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:22:33,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-13 20:22:33,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=2155, Unknown=0, NotChecked=0, Total=2352 [2022-12-13 20:22:33,174 INFO L87 Difference]: Start difference. First operand 277 states and 320 transitions. Second operand has 49 states, 47 states have (on average 2.7872340425531914) internal successors, (131), 48 states have internal predecessors, (131), 9 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 7 states have call predecessors, (10), 9 states have call successors, (10) [2022-12-13 20:22:36,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:22:40,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:22:43,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:22:45,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:22:48,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:22:50,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:22:53,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:22:55,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:22:57,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:22:59,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:23:01,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:23:03,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:23:05,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:23:08,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:23:10,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:23:12,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:23:14,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:23:16,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:23:18,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:23:18,400 INFO L93 Difference]: Finished difference Result 691 states and 778 transitions. [2022-12-13 20:23:18,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-12-13 20:23:18,400 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 2.7872340425531914) internal successors, (131), 48 states have internal predecessors, (131), 9 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 7 states have call predecessors, (10), 9 states have call successors, (10) Word has length 74 [2022-12-13 20:23:18,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:23:18,403 INFO L225 Difference]: With dead ends: 691 [2022-12-13 20:23:18,403 INFO L226 Difference]: Without dead ends: 684 [2022-12-13 20:23:18,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 119 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4071 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2198, Invalid=14314, Unknown=0, NotChecked=0, Total=16512 [2022-12-13 20:23:18,405 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 1792 mSDsluCounter, 3407 mSDsCounter, 0 mSdLazyCounter, 5769 mSolverCounterSat, 64 mSolverCounterUnsat, 21 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1794 SdHoareTripleChecker+Valid, 3577 SdHoareTripleChecker+Invalid, 5854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 5769 IncrementalHoareTripleChecker+Invalid, 21 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:23:18,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1794 Valid, 3577 Invalid, 5854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 5769 Invalid, 21 Unknown, 0 Unchecked, 41.2s Time] [2022-12-13 20:23:18,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-12-13 20:23:18,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 337. [2022-12-13 20:23:18,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 317 states have (on average 1.160883280757098) internal successors, (368), 323 states have internal predecessors, (368), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 20:23:18,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 388 transitions. [2022-12-13 20:23:18,410 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 388 transitions. Word has length 74 [2022-12-13 20:23:18,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:23:18,410 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 388 transitions. [2022-12-13 20:23:18,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 2.7872340425531914) internal successors, (131), 48 states have internal predecessors, (131), 9 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 7 states have call predecessors, (10), 9 states have call successors, (10) [2022-12-13 20:23:18,410 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 388 transitions. [2022-12-13 20:23:18,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-13 20:23:18,410 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:23:18,411 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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] [2022-12-13 20:23:18,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-12-13 20:23:18,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-12-13 20:23:18,611 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:23:18,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:23:18,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1481214108, now seen corresponding path program 2 times [2022-12-13 20:23:18,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:23:18,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214182430] [2022-12-13 20:23:18,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:23:18,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:23:18,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:23:18,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:23:18,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:23:18,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 20:23:18,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:23:18,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 20:23:18,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:23:18,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 20:23:18,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:23:18,768 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 54 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:23:18,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:23:18,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214182430] [2022-12-13 20:23:18,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214182430] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:23:18,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300866762] [2022-12-13 20:23:18,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:23:18,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:23:18,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:23:18,769 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:23:18,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-13 20:23:18,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:23:18,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:23:18,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 20:23:18,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:23:18,959 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 26 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 20:23:18,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:23:19,052 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 20:23:19,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300866762] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:23:19,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:23:19,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 20 [2022-12-13 20:23:19,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964523938] [2022-12-13 20:23:19,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:23:19,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 20:23:19,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:23:19,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 20:23:19,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-12-13 20:23:19,053 INFO L87 Difference]: Start difference. First operand 337 states and 388 transitions. Second operand has 20 states, 20 states have (on average 4.95) internal successors, (99), 19 states have internal predecessors, (99), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:23:19,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:23:19,550 INFO L93 Difference]: Finished difference Result 512 states and 584 transitions. [2022-12-13 20:23:19,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-13 20:23:19,551 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.95) internal successors, (99), 19 states have internal predecessors, (99), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 75 [2022-12-13 20:23:19,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:23:19,552 INFO L225 Difference]: With dead ends: 512 [2022-12-13 20:23:19,552 INFO L226 Difference]: Without dead ends: 512 [2022-12-13 20:23:19,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 145 SyntacticMatches, 8 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=308, Invalid=1332, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 20:23:19,552 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 666 mSDsluCounter, 1174 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 20:23:19,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [669 Valid, 1296 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 20:23:19,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-12-13 20:23:19,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 329. [2022-12-13 20:23:19,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 309 states have (on average 1.1521035598705502) internal successors, (356), 315 states have internal predecessors, (356), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 20:23:19,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 376 transitions. [2022-12-13 20:23:19,556 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 376 transitions. Word has length 75 [2022-12-13 20:23:19,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:23:19,556 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 376 transitions. [2022-12-13 20:23:19,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.95) internal successors, (99), 19 states have internal predecessors, (99), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:23:19,556 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 376 transitions. [2022-12-13 20:23:19,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-12-13 20:23:19,557 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:23:19,557 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:23:19,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-13 20:23:19,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-12-13 20:23:19,758 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:23:19,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:23:19,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1833874459, now seen corresponding path program 1 times [2022-12-13 20:23:19,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:23:19,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995402786] [2022-12-13 20:23:19,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:23:19,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:23:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:23:19,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:23:19,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:23:19,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 20:23:19,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:23:19,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-12-13 20:23:19,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:23:19,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 20:23:19,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:23:19,969 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 20:23:19,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:23:19,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995402786] [2022-12-13 20:23:19,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995402786] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:23:19,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173387302] [2022-12-13 20:23:19,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:23:19,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:23:19,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:23:19,970 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:23:19,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-13 20:23:20,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:23:20,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 20:23:20,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:23:20,242 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 20:23:20,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:23:20,394 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 25 treesize of output 21 [2022-12-13 20:23:20,462 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 20:23:20,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173387302] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:23:20,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:23:20,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2022-12-13 20:23:20,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138874391] [2022-12-13 20:23:20,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:23:20,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 20:23:20,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:23:20,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 20:23:20,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-12-13 20:23:20,464 INFO L87 Difference]: Start difference. First operand 329 states and 376 transitions. Second operand has 25 states, 24 states have (on average 7.041666666666667) internal successors, (169), 24 states have internal predecessors, (169), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-13 20:23:20,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:23:20,748 INFO L93 Difference]: Finished difference Result 344 states and 390 transitions. [2022-12-13 20:23:20,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 20:23:20,748 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 7.041666666666667) internal successors, (169), 24 states have internal predecessors, (169), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 77 [2022-12-13 20:23:20,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:23:20,749 INFO L225 Difference]: With dead ends: 344 [2022-12-13 20:23:20,749 INFO L226 Difference]: Without dead ends: 344 [2022-12-13 20:23:20,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=813, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 20:23:20,750 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 403 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:23:20,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 290 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 20:23:20,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-12-13 20:23:20,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 333. [2022-12-13 20:23:20,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 313 states have (on average 1.1501597444089458) internal successors, (360), 319 states have internal predecessors, (360), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 20:23:20,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 380 transitions. [2022-12-13 20:23:20,753 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 380 transitions. Word has length 77 [2022-12-13 20:23:20,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:23:20,753 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 380 transitions. [2022-12-13 20:23:20,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 7.041666666666667) internal successors, (169), 24 states have internal predecessors, (169), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-13 20:23:20,753 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 380 transitions. [2022-12-13 20:23:20,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-12-13 20:23:20,754 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:23:20,754 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 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] [2022-12-13 20:23:20,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-12-13 20:23:20,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-12-13 20:23:20,955 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:23:20,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:23:20,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1224026182, now seen corresponding path program 3 times [2022-12-13 20:23:20,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:23:20,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812601784] [2022-12-13 20:23:20,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:23:20,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:23:20,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:23:21,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:23:21,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:23:21,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 20:23:21,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:23:21,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-12-13 20:23:21,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:23:21,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 20:23:21,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:23:21,241 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 21 proven. 83 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 20:23:21,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:23:21,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812601784] [2022-12-13 20:23:21,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812601784] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:23:21,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91115193] [2022-12-13 20:23:21,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:23:21,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:23:21,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:23:21,242 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:23:21,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-13 20:23:21,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 20:23:21,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:23:21,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 20:23:21,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:23:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-13 20:23:21,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:23:21,820 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-12-13 20:23:21,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91115193] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:23:21,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:23:21,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8, 8] total 31 [2022-12-13 20:23:21,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969487847] [2022-12-13 20:23:21,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:23:21,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 20:23:21,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:23:21,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 20:23:21,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2022-12-13 20:23:21,822 INFO L87 Difference]: Start difference. First operand 333 states and 380 transitions. Second operand has 31 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 30 states have internal predecessors, (110), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:23:24,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:23:24,230 INFO L93 Difference]: Finished difference Result 618 states and 700 transitions. [2022-12-13 20:23:24,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-12-13 20:23:24,231 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 30 states have internal predecessors, (110), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 79 [2022-12-13 20:23:24,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:23:24,234 INFO L225 Difference]: With dead ends: 618 [2022-12-13 20:23:24,234 INFO L226 Difference]: Without dead ends: 618 [2022-12-13 20:23:24,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2879 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1635, Invalid=8465, Unknown=0, NotChecked=0, Total=10100 [2022-12-13 20:23:24,235 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 1741 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 1439 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1744 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-13 20:23:24,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1744 Valid, 673 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1439 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-13 20:23:24,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-12-13 20:23:24,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 356. [2022-12-13 20:23:24,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 336 states have (on average 1.1339285714285714) internal successors, (381), 342 states have internal predecessors, (381), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-13 20:23:24,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 401 transitions. [2022-12-13 20:23:24,240 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 401 transitions. Word has length 79 [2022-12-13 20:23:24,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:23:24,240 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 401 transitions. [2022-12-13 20:23:24,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 30 states have internal predecessors, (110), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 20:23:24,240 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 401 transitions. [2022-12-13 20:23:24,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-13 20:23:24,241 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:23:24,241 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:23:24,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-13 20:23:24,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-12-13 20:23:24,442 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 20:23:24,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:23:24,443 INFO L85 PathProgramCache]: Analyzing trace with hash 970084470, now seen corresponding path program 1 times [2022-12-13 20:23:24,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:23:24,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21222278] [2022-12-13 20:23:24,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:23:24,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:23:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:23:27,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 20:23:27,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:23:27,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-12-13 20:23:27,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:23:27,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-12-13 20:23:27,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:23:27,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-12-13 20:23:27,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:23:27,236 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 20:23:27,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:23:27,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21222278] [2022-12-13 20:23:27,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21222278] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:23:27,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826962012] [2022-12-13 20:23:27,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:23:27,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:23:27,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:23:27,238 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:23:27,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69666539-ca1a-417a-a624-d6f636560e36/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-13 20:23:27,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:23:27,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 142 conjunts are in the unsatisfiable core [2022-12-13 20:23:27,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:23:27,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 20:23:27,588 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 7 treesize of output 6 [2022-12-13 20:23:27,669 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 20:23:27,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 20:23:27,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2022-12-13 20:23:27,767 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 28 treesize of output 26 [2022-12-13 20:23:27,905 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 28 treesize of output 26 [2022-12-13 20:23:28,715 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 35 treesize of output 33 [2022-12-13 20:23:29,333 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 43 treesize of output 41 [2022-12-13 20:23:35,139 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 82 treesize of output 74 [2022-12-13 20:23:35,860 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 111 treesize of output 109 [2022-12-13 20:23:54,459 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 107 treesize of output 99 [2022-12-13 20:23:54,681 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 20:23:54,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:30:47,105 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_check_~a0#1.offset_13| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_40| Int) (|v_ULTIMATE.start_upsweep_~right~0#1_86| Int) (v_ArrVal_1228 Int)) (or (< |v_ULTIMATE.start_upsweep_~a#1.offset_40| |c_ULTIMATE.start_main_~a~0#1.offset|) (let ((.cse0 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |v_ULTIMATE.start_upsweep_~a#1.offset_40| (* |v_ULTIMATE.start_upsweep_~right~0#1_86| 4)) v_ArrVal_1228) (+ (- 4) (* |c_ULTIMATE.start_main_~n~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse3 (select .cse0 .cse1))) (let ((.cse2 (+ .cse3 (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse0 .cse1 .cse2) |c_ULTIMATE.start_main_~a~0#1.offset| .cse3)) |c_ULTIMATE.start_main_~a0~0#1.base|) |v_ULTIMATE.start_check_~a0#1.offset_13|) .cse2)))) (< |v_ULTIMATE.start_upsweep_~right~0#1_86| 1) (< |c_ULTIMATE.start_main_~a0~0#1.offset| |v_ULTIMATE.start_check_~a0#1.offset_13|))) is different from false [2022-12-13 20:31:03,072 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~n~0#1| Int)) (or (forall ((|v_ULTIMATE.start_check_~a0#1.offset_13| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_40| Int) (v_ArrVal_1225 Int) (|v_ULTIMATE.start_upsweep_~right~0#1_86| Int) (v_ArrVal_1228 Int)) (or (< |v_ULTIMATE.start_upsweep_~a#1.offset_40| |c_ULTIMATE.start_main_~a~0#1.offset|) (< |v_ULTIMATE.start_upsweep_~right~0#1_86| 1) (< |c_ULTIMATE.start_main_~a0~0#1.offset| |v_ULTIMATE.start_check_~a0#1.offset_13|) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base|) (+ |c_ULTIMATE.start_main_~a0~0#1.offset| (* |c_ULTIMATE.start_main_~i~1#1| 4)) v_ArrVal_1225)))) (let ((.cse2 (store (store (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|) (+ |v_ULTIMATE.start_upsweep_~a#1.offset_40| (* |v_ULTIMATE.start_upsweep_~right~0#1_86| 4)) v_ArrVal_1228) (+ (- 4) (* |ULTIMATE.start_main_~n~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (.cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse4 (select .cse2 .cse3))) (let ((.cse0 (+ (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse4))) (= .cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse2 .cse3 .cse0) |c_ULTIMATE.start_main_~a~0#1.offset| .cse4)) |c_ULTIMATE.start_main_~a0~0#1.base|) |v_ULTIMATE.start_check_~a0#1.offset_13|)))))))) (< (+ |c_ULTIMATE.start_main_~i~1#1| 1) |ULTIMATE.start_main_~n~0#1|) (not (< |c_ULTIMATE.start_main_~i~1#1| |ULTIMATE.start_main_~n~0#1|)))) is different from false [2022-12-13 20:31:05,126 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_check_~a0#1.offset_13| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_40| Int) (v_ArrVal_1225 Int) (|v_ULTIMATE.start_upsweep_~right~0#1_86| Int) (v_ArrVal_1228 Int) (|ULTIMATE.start_main_~n~0#1| Int)) (or (< |v_ULTIMATE.start_upsweep_~a#1.offset_40| |c_ULTIMATE.start_main_~a~0#1.offset|) (not (< (+ |c_ULTIMATE.start_main_~i~1#1| 1) |ULTIMATE.start_main_~n~0#1|)) (< (+ |c_ULTIMATE.start_main_~i~1#1| 2) |ULTIMATE.start_main_~n~0#1|) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base|) (+ |c_ULTIMATE.start_main_~a0~0#1.offset| 4 (* |c_ULTIMATE.start_main_~i~1#1| 4)) v_ArrVal_1225)))) (let ((.cse1 (store (store (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) (+ |v_ULTIMATE.start_upsweep_~a#1.offset_40| (* |v_ULTIMATE.start_upsweep_~right~0#1_86| 4)) v_ArrVal_1228) (+ (- 4) (* |ULTIMATE.start_main_~n~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (.cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse4 (select .cse1 .cse2))) (let ((.cse3 (+ (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse4))) (= (select (select (store .cse0 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse1 .cse2 .cse3) |c_ULTIMATE.start_main_~a~0#1.offset| .cse4)) |c_ULTIMATE.start_main_~a0~0#1.base|) |v_ULTIMATE.start_check_~a0#1.offset_13|) .cse3))))) (< |v_ULTIMATE.start_upsweep_~right~0#1_86| 1) (< |c_ULTIMATE.start_main_~a0~0#1.offset| |v_ULTIMATE.start_check_~a0#1.offset_13|))) is different from false [2022-12-13 20:31:07,246 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~a0~0#1.offset| Int) (|v_ULTIMATE.start_check_~a0#1.offset_13| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_40| Int) (v_ArrVal_1225 Int) (|v_ULTIMATE.start_upsweep_~right~0#1_86| Int) (v_ArrVal_1228 Int) (|ULTIMATE.start_main_~n~0#1| Int)) (or (< |v_ULTIMATE.start_upsweep_~a#1.offset_40| |c_ULTIMATE.start_main_~a~0#1.offset|) (not (< (+ |c_ULTIMATE.start_main_~i~1#1| 1) |ULTIMATE.start_main_~n~0#1|)) (< (+ |c_ULTIMATE.start_main_~i~1#1| 2) |ULTIMATE.start_main_~n~0#1|) (< |ULTIMATE.start_main_~a0~0#1.offset| |v_ULTIMATE.start_check_~a0#1.offset_13|) (< |v_ULTIMATE.start_upsweep_~right~0#1_86| 1) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base| (let ((.cse5 (* |c_ULTIMATE.start_main_~i~1#1| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base|) (+ |ULTIMATE.start_main_~a0~0#1.offset| .cse5) |c_ULTIMATE.start_main_#t~mem18#1|) (+ |ULTIMATE.start_main_~a0~0#1.offset| 4 .cse5) v_ArrVal_1225))))) (let ((.cse1 (store (store (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) (+ |v_ULTIMATE.start_upsweep_~a#1.offset_40| (* |v_ULTIMATE.start_upsweep_~right~0#1_86| 4)) v_ArrVal_1228) (+ (- 4) (* |ULTIMATE.start_main_~n~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (.cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse4 (select .cse1 .cse2))) (let ((.cse3 (+ .cse4 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (= (select (select (store .cse0 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse1 .cse2 .cse3) |c_ULTIMATE.start_main_~a~0#1.offset| .cse4)) |c_ULTIMATE.start_main_~a0~0#1.base|) |v_ULTIMATE.start_check_~a0#1.offset_13|) .cse3))))))) is different from false [2022-12-13 20:31:09,337 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~a0~0#1.offset| Int) (|v_ULTIMATE.start_check_~a0#1.offset_13| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_40| Int) (v_ArrVal_1225 Int) (|v_ULTIMATE.start_upsweep_~right~0#1_86| Int) (v_ArrVal_1228 Int) (|ULTIMATE.start_main_~n~0#1| Int)) (or (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base| (let ((.cse5 (* |c_ULTIMATE.start_main_~i~1#1| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base|) (+ |ULTIMATE.start_main_~a0~0#1.offset| .cse5) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse5))) (+ |ULTIMATE.start_main_~a0~0#1.offset| 4 .cse5) v_ArrVal_1225))))) (let ((.cse1 (store (store (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) (+ |v_ULTIMATE.start_upsweep_~a#1.offset_40| (* |v_ULTIMATE.start_upsweep_~right~0#1_86| 4)) v_ArrVal_1228) (+ (- 4) (* |ULTIMATE.start_main_~n~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (.cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse4 (select .cse1 .cse2))) (let ((.cse3 (+ .cse4 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (= (select (select (store .cse0 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse1 .cse2 .cse3) |c_ULTIMATE.start_main_~a~0#1.offset| .cse4)) |c_ULTIMATE.start_main_~a0~0#1.base|) |v_ULTIMATE.start_check_~a0#1.offset_13|) .cse3))))) (< |v_ULTIMATE.start_upsweep_~a#1.offset_40| |c_ULTIMATE.start_main_~a~0#1.offset|) (not (< (+ |c_ULTIMATE.start_main_~i~1#1| 1) |ULTIMATE.start_main_~n~0#1|)) (< (+ |c_ULTIMATE.start_main_~i~1#1| 2) |ULTIMATE.start_main_~n~0#1|) (< |ULTIMATE.start_main_~a0~0#1.offset| |v_ULTIMATE.start_check_~a0#1.offset_13|) (< |v_ULTIMATE.start_upsweep_~right~0#1_86| 1))) is different from false [2022-12-13 20:31:11,496 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~a0~0#1.offset| Int) (|v_ULTIMATE.start_check_~a0#1.offset_13| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_40| Int) (v_ArrVal_1225 Int) (|v_ULTIMATE.start_upsweep_~right~0#1_86| Int) (v_ArrVal_1228 Int) (|ULTIMATE.start_main_~n~0#1| Int)) (or (< |v_ULTIMATE.start_upsweep_~a#1.offset_40| |c_ULTIMATE.start_main_~a~0#1.offset|) (< 2 |ULTIMATE.start_main_~n~0#1|) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base|) |ULTIMATE.start_main_~a0~0#1.offset| (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|)) (+ |ULTIMATE.start_main_~a0~0#1.offset| 4) v_ArrVal_1225)))) (let ((.cse2 (store (store (select .cse1 |c_ULTIMATE.start_main_~a~0#1.base|) (+ |v_ULTIMATE.start_upsweep_~a#1.offset_40| (* |v_ULTIMATE.start_upsweep_~right~0#1_86| 4)) v_ArrVal_1228) (+ (- 4) (* |ULTIMATE.start_main_~n~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (.cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse4 (select .cse2 .cse3))) (let ((.cse0 (+ .cse4 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (= .cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse2 .cse3 .cse0) |c_ULTIMATE.start_main_~a~0#1.offset| .cse4)) |c_ULTIMATE.start_main_#t~malloc16#1.base|) |v_ULTIMATE.start_check_~a0#1.offset_13|)))))) (< |ULTIMATE.start_main_~a0~0#1.offset| |v_ULTIMATE.start_check_~a0#1.offset_13|) (< |v_ULTIMATE.start_upsweep_~right~0#1_86| 1) (not (< 1 |ULTIMATE.start_main_~n~0#1|)))) is different from false [2022-12-13 20:33:21,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826962012] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:33:21,109 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 20:33:21,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 44] total 71 [2022-12-13 20:33:21,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525378667] [2022-12-13 20:33:21,110 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 20:33:21,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-12-13 20:33:21,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:33:21,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-12-13 20:33:21,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=551, Invalid=8608, Unknown=177, NotChecked=1170, Total=10506 [2022-12-13 20:33:21,112 INFO L87 Difference]: Start difference. First operand 356 states and 401 transitions. Second operand has 71 states, 68 states have (on average 1.8235294117647058) internal successors, (124), 67 states have internal predecessors, (124), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-13 20:33:28,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:33:30,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:34:02,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:34:04,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:34:06,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:34:08,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:34:10,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:34:16,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:34:18,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:34:20,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:34:22,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-13 20:34:34,430 WARN L233 SmtUtils]: Spent 5.02s on a formula simplification. DAG size of input: 153 DAG size of output: 105 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:35:12,648 WARN L233 SmtUtils]: Spent 6.16s on a formula simplification. DAG size of input: 148 DAG size of output: 128 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:35:15,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]