./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc --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 3a80fea07b3dad363ac033c87feb8bfcf28a57d2e75bc95b67f90908b133efe1 --- 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-5e519f3 [2022-11-02 20:50:46,387 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:50:46,390 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:50:46,444 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:50:46,444 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:50:46,449 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:50:46,454 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:50:46,457 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:50:46,459 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:50:46,465 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:50:46,467 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:50:46,468 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:50:46,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:50:46,471 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:50:46,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:50:46,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:50:46,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:50:46,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:50:46,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:50:46,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:50:46,489 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:50:46,492 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:50:46,493 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:50:46,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:50:46,499 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:50:46,503 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:50:46,504 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:50:46,505 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:50:46,507 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:50:46,508 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:50:46,509 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:50:46,510 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:50:46,511 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:50:46,513 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:50:46,515 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:50:46,515 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:50:46,516 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:50:46,516 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:50:46,516 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:50:46,517 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:50:46,518 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:50:46,519 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-02 20:50:46,559 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:50:46,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:50:46,560 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:50:46,561 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:50:46,562 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:50:46,562 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:50:46,563 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:50:46,563 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:50:46,563 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:50:46,563 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:50:46,565 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:50:46,565 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-02 20:50:46,565 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:50:46,565 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:50:46,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:50:46,566 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-02 20:50:46,566 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-02 20:50:46,566 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-02 20:50:46,566 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:50:46,567 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-02 20:50:46,567 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:50:46,567 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:50:46,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:50:46,568 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:50:46,568 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:50:46,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:50:46,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:50:46,569 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:50:46,569 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:50:46,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:50:46,571 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a80fea07b3dad363ac033c87feb8bfcf28a57d2e75bc95b67f90908b133efe1 [2022-11-02 20:50:46,846 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:50:46,879 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:50:46,882 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:50:46,884 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:50:46,885 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:50:46,887 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2022-11-02 20:50:46,986 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/data/019e11962/f43cc1c54fb046dc84323fc7bfbe5027/FLAG126404b8e [2022-11-02 20:50:47,565 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:50:47,566 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c [2022-11-02 20:50:47,575 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/data/019e11962/f43cc1c54fb046dc84323fc7bfbe5027/FLAG126404b8e [2022-11-02 20:50:47,903 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/data/019e11962/f43cc1c54fb046dc84323fc7bfbe5027 [2022-11-02 20:50:47,905 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:50:47,907 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:50:47,909 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:50:47,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:50:47,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:50:47,914 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:50:47" (1/1) ... [2022-11-02 20:50:47,915 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c2453ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:50:47, skipping insertion in model container [2022-11-02 20:50:47,915 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:50:47" (1/1) ... [2022-11-02 20:50:47,923 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:50:47,938 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:50:48,128 WARN L230 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_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c[502,515] [2022-11-02 20:50:48,164 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:50:48,176 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:50:48,190 WARN L230 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_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/sv-benchmarks/c/verifythis/elimination_max_rec_onepoint.c[502,515] [2022-11-02 20:50:48,200 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:50:48,217 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:50:48,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:50:48 WrapperNode [2022-11-02 20:50:48,218 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:50:48,219 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:50:48,219 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:50:48,219 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:50:48,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:50:48" (1/1) ... [2022-11-02 20:50:48,237 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:50:48" (1/1) ... [2022-11-02 20:50:48,257 INFO L138 Inliner]: procedures = 19, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 39 [2022-11-02 20:50:48,258 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:50:48,259 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:50:48,259 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:50:48,259 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:50:48,270 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:50:48" (1/1) ... [2022-11-02 20:50:48,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:50:48" (1/1) ... [2022-11-02 20:50:48,274 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:50:48" (1/1) ... [2022-11-02 20:50:48,274 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:50:48" (1/1) ... [2022-11-02 20:50:48,281 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:50:48" (1/1) ... [2022-11-02 20:50:48,283 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:50:48" (1/1) ... [2022-11-02 20:50:48,285 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:50:48" (1/1) ... [2022-11-02 20:50:48,286 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:50:48" (1/1) ... [2022-11-02 20:50:48,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:50:48,290 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:50:48,290 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:50:48,290 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:50:48,291 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:50:48" (1/1) ... [2022-11-02 20:50:48,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:50:48,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:48,330 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:50:48,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:50:48,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:50:48,392 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-02 20:50:48,393 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-02 20:50:48,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:50:48,393 INFO L130 BoogieDeclarations]: Found specification of procedure check [2022-11-02 20:50:48,393 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2022-11-02 20:50:48,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 20:50:48,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:50:48,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:50:48,394 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:50:48,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-02 20:50:48,394 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-02 20:50:48,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:50:48,517 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:50:48,520 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:50:48,810 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:50:48,817 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:50:48,818 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-02 20:50:48,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:50:48 BoogieIcfgContainer [2022-11-02 20:50:48,820 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:50:48,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:50:48,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:50:48,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:50:48,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:50:47" (1/3) ... [2022-11-02 20:50:48,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2df0f203 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:50:48, skipping insertion in model container [2022-11-02 20:50:48,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:50:48" (2/3) ... [2022-11-02 20:50:48,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2df0f203 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:50:48, skipping insertion in model container [2022-11-02 20:50:48,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:50:48" (3/3) ... [2022-11-02 20:50:48,831 INFO L112 eAbstractionObserver]: Analyzing ICFG elimination_max_rec_onepoint.c [2022-11-02 20:50:48,853 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:50:48,854 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2022-11-02 20:50:48,907 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:50:48,915 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@55526183, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:50:48,915 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2022-11-02 20:50:48,920 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 35 states have (on average 1.6) internal successors, (56), 52 states have internal predecessors, (56), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 20:50:48,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-02 20:50:48,930 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:48,930 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:48,931 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-02 20:50:48,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:48,937 INFO L85 PathProgramCache]: Analyzing trace with hash -724999257, now seen corresponding path program 1 times [2022-11-02 20:50:48,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:48,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133594785] [2022-11-02 20:50:48,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:48,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:49,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:49,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:50:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:49,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:50:49,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:49,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:50:49,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:49,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133594785] [2022-11-02 20:50:49,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133594785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:49,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:49,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:50:49,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138212933] [2022-11-02 20:50:49,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:49,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:50:49,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:49,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:50:49,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:50:49,255 INFO L87 Difference]: Start difference. First operand has 64 states, 35 states have (on average 1.6) internal successors, (56), 52 states have internal predecessors, (56), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:50:49,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:49,287 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2022-11-02 20:50:49,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:50:49,290 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-11-02 20:50:49,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:49,305 INFO L225 Difference]: With dead ends: 64 [2022-11-02 20:50:49,305 INFO L226 Difference]: Without dead ends: 62 [2022-11-02 20:50:49,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:50:49,313 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:49,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:50:49,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-02 20:50:49,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-11-02 20:50:49,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 50 states have internal predecessors, (52), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 20:50:49,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2022-11-02 20:50:49,375 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 22 [2022-11-02 20:50:49,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:49,376 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2022-11-02 20:50:49,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:50:49,376 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2022-11-02 20:50:49,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-02 20:50:49,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:49,384 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:49,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:50:49,386 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-02 20:50:49,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:49,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1833988771, now seen corresponding path program 1 times [2022-11-02 20:50:49,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:49,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604722017] [2022-11-02 20:50:49,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:49,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:49,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:49,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:50:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:49,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:50:49,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:49,828 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:50:49,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:49,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604722017] [2022-11-02 20:50:49,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604722017] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:49,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:49,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:50:49,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530578290] [2022-11-02 20:50:49,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:49,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:50:49,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:49,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:50:49,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:50:49,833 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:50:50,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:50,042 INFO L93 Difference]: Finished difference Result 106 states and 119 transitions. [2022-11-02 20:50:50,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:50:50,043 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-11-02 20:50:50,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:50,046 INFO L225 Difference]: With dead ends: 106 [2022-11-02 20:50:50,046 INFO L226 Difference]: Without dead ends: 106 [2022-11-02 20:50:50,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:50:50,048 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 47 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:50,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 318 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:50:50,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-02 20:50:50,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 85. [2022-11-02 20:50:50,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 50 states have (on average 1.56) internal successors, (78), 67 states have internal predecessors, (78), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-02 20:50:50,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2022-11-02 20:50:50,064 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 22 [2022-11-02 20:50:50,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:50,064 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2022-11-02 20:50:50,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:50:50,065 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2022-11-02 20:50:50,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-02 20:50:50,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:50,066 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:50,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:50:50,067 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-02 20:50:50,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:50,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1832511589, now seen corresponding path program 1 times [2022-11-02 20:50:50,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:50,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370564977] [2022-11-02 20:50:50,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:50,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:50,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:50,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:50:50,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:50,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:50:50,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:50,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:50:50,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:50,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:50:50,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:50,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370564977] [2022-11-02 20:50:50,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370564977] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:50,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:50,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:50:50,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159262660] [2022-11-02 20:50:50,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:50,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:50:50,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:50,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:50:50,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:50:50,168 INFO L87 Difference]: Start difference. First operand 85 states and 104 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:50:50,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:50,229 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2022-11-02 20:50:50,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:50:50,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-11-02 20:50:50,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:50,231 INFO L225 Difference]: With dead ends: 82 [2022-11-02 20:50:50,232 INFO L226 Difference]: Without dead ends: 82 [2022-11-02 20:50:50,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:50:50,233 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 22 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:50,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 129 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:50:50,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-02 20:50:50,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-11-02 20:50:50,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.5) internal successors, (75), 64 states have internal predecessors, (75), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-02 20:50:50,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2022-11-02 20:50:50,243 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 22 [2022-11-02 20:50:50,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:50,244 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2022-11-02 20:50:50,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:50:50,245 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2022-11-02 20:50:50,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-02 20:50:50,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:50,246 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:50,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:50:50,246 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-02 20:50:50,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:50,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1832511590, now seen corresponding path program 1 times [2022-11-02 20:50:50,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:50,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854452880] [2022-11-02 20:50:50,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:50,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:50,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:50,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:50:50,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:50,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:50:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:50,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:50:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:50:50,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:50,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854452880] [2022-11-02 20:50:50,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854452880] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:50,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:50,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:50:50,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960982581] [2022-11-02 20:50:50,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:50,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:50:50,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:50,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:50:50,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:50:50,545 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:50:50,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:50,691 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2022-11-02 20:50:50,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:50:50,692 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-11-02 20:50:50,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:50,693 INFO L225 Difference]: With dead ends: 80 [2022-11-02 20:50:50,693 INFO L226 Difference]: Without dead ends: 80 [2022-11-02 20:50:50,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:50:50,695 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 37 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:50,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 237 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:50:50,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-02 20:50:50,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-11-02 20:50:50,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 50 states have (on average 1.46) internal successors, (73), 62 states have internal predecessors, (73), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-02 20:50:50,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 99 transitions. [2022-11-02 20:50:50,705 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 99 transitions. Word has length 22 [2022-11-02 20:50:50,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:50,706 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 99 transitions. [2022-11-02 20:50:50,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:50:50,706 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 99 transitions. [2022-11-02 20:50:50,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-02 20:50:50,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:50,707 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:50,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:50:50,708 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-02 20:50:50,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:50,709 INFO L85 PathProgramCache]: Analyzing trace with hash 107045159, now seen corresponding path program 1 times [2022-11-02 20:50:50,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:50,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205322880] [2022-11-02 20:50:50,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:50,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:50,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:50,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:50:50,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:50,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:50:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:50,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:50:50,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:50,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:50:50,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:50,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205322880] [2022-11-02 20:50:50,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205322880] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:50,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:50,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-02 20:50:50,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304280273] [2022-11-02 20:50:50,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:50,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:50:50,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:50,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:50:50,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:50:50,926 INFO L87 Difference]: Start difference. First operand 80 states and 99 transitions. Second operand has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:50:51,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:51,110 INFO L93 Difference]: Finished difference Result 119 states and 151 transitions. [2022-11-02 20:50:51,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:50:51,111 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-11-02 20:50:51,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:51,112 INFO L225 Difference]: With dead ends: 119 [2022-11-02 20:50:51,112 INFO L226 Difference]: Without dead ends: 119 [2022-11-02 20:50:51,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:50:51,114 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 79 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:51,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 257 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:50:51,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-02 20:50:51,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 86. [2022-11-02 20:50:51,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 67 states have internal predecessors, (78), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-11-02 20:50:51,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2022-11-02 20:50:51,125 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 24 [2022-11-02 20:50:51,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:51,125 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 106 transitions. [2022-11-02 20:50:51,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:50:51,126 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions. [2022-11-02 20:50:51,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-02 20:50:51,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:51,127 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:51,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:50:51,127 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-02 20:50:51,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:51,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1801661154, now seen corresponding path program 1 times [2022-11-02 20:50:51,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:51,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765223108] [2022-11-02 20:50:51,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:51,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:51,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:51,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:50:51,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:51,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:50:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:51,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:50:51,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:50:51,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:51,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765223108] [2022-11-02 20:50:51,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765223108] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:51,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:51,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-02 20:50:51,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331267190] [2022-11-02 20:50:51,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:51,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:50:51,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:51,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:50:51,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:50:51,413 INFO L87 Difference]: Start difference. First operand 86 states and 106 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:50:51,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:51,678 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2022-11-02 20:50:51,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:50:51,679 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-11-02 20:50:51,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:51,680 INFO L225 Difference]: With dead ends: 90 [2022-11-02 20:50:51,680 INFO L226 Difference]: Without dead ends: 90 [2022-11-02 20:50:51,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2022-11-02 20:50:51,682 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 43 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:51,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 412 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:50:51,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-02 20:50:51,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-11-02 20:50:51,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 58 states have (on average 1.396551724137931) internal successors, (81), 70 states have internal predecessors, (81), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-11-02 20:50:51,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 109 transitions. [2022-11-02 20:50:51,690 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 109 transitions. Word has length 29 [2022-11-02 20:50:51,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:51,690 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 109 transitions. [2022-11-02 20:50:51,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:50:51,691 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 109 transitions. [2022-11-02 20:50:51,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-02 20:50:51,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:51,692 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:51,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 20:50:51,692 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting checkErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-02 20:50:51,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:51,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1023324068, now seen corresponding path program 1 times [2022-11-02 20:50:51,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:51,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346093674] [2022-11-02 20:50:51,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:51,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:51,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:50:51,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:51,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:50:51,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:51,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-02 20:50:51,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:51,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:50:51,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:51,956 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:50:51,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:51,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346093674] [2022-11-02 20:50:51,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346093674] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:51,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:51,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:50:51,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750541263] [2022-11-02 20:50:51,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:51,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:50:51,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:51,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:50:51,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:50:51,962 INFO L87 Difference]: Start difference. First operand 90 states and 109 transitions. Second operand has 7 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:50:52,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:52,308 INFO L93 Difference]: Finished difference Result 110 states and 123 transitions. [2022-11-02 20:50:52,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:50:52,309 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-11-02 20:50:52,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:52,311 INFO L225 Difference]: With dead ends: 110 [2022-11-02 20:50:52,311 INFO L226 Difference]: Without dead ends: 110 [2022-11-02 20:50:52,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:50:52,314 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 79 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:52,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 197 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:50:52,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-02 20:50:52,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 90. [2022-11-02 20:50:52,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 58 states have (on average 1.3793103448275863) internal successors, (80), 70 states have internal predecessors, (80), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-11-02 20:50:52,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2022-11-02 20:50:52,356 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 30 [2022-11-02 20:50:52,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:52,357 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2022-11-02 20:50:52,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:50:52,357 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2022-11-02 20:50:52,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-02 20:50:52,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:52,361 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:52,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:50:52,362 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting checkErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-02 20:50:52,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:52,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1023324067, now seen corresponding path program 1 times [2022-11-02 20:50:52,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:52,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124090101] [2022-11-02 20:50:52,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:52,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:52,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:52,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:50:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:52,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:50:52,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:52,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-02 20:50:52,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:52,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:50:52,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:52,477 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:50:52,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:52,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124090101] [2022-11-02 20:50:52,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124090101] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:52,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:52,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:50:52,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773791310] [2022-11-02 20:50:52,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:52,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:50:52,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:52,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:50:52,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:50:52,480 INFO L87 Difference]: Start difference. First operand 90 states and 108 transitions. Second operand has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:50:52,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:52,600 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2022-11-02 20:50:52,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:50:52,601 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-11-02 20:50:52,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:52,602 INFO L225 Difference]: With dead ends: 86 [2022-11-02 20:50:52,602 INFO L226 Difference]: Without dead ends: 86 [2022-11-02 20:50:52,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:50:52,603 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 54 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:52,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 121 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:50:52,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-02 20:50:52,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-11-02 20:50:52,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 66 states have internal predecessors, (72), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-11-02 20:50:52,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 100 transitions. [2022-11-02 20:50:52,608 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 100 transitions. Word has length 30 [2022-11-02 20:50:52,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:52,608 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 100 transitions. [2022-11-02 20:50:52,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:50:52,609 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 100 transitions. [2022-11-02 20:50:52,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-02 20:50:52,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:52,610 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:52,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-02 20:50:52,610 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting checkErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-02 20:50:52,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:52,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1658275025, now seen corresponding path program 1 times [2022-11-02 20:50:52,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:52,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356876717] [2022-11-02 20:50:52,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:52,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:52,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:52,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:50:52,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:52,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:50:52,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:52,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-02 20:50:52,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:52,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:50:52,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:52,897 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:50:52,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:52,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356876717] [2022-11-02 20:50:52,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356876717] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:52,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:52,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-02 20:50:52,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461639610] [2022-11-02 20:50:52,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:52,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:50:52,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:52,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:50:52,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:50:52,901 INFO L87 Difference]: Start difference. First operand 86 states and 100 transitions. Second operand has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:50:53,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:53,197 INFO L93 Difference]: Finished difference Result 99 states and 112 transitions. [2022-11-02 20:50:53,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:50:53,198 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2022-11-02 20:50:53,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:53,200 INFO L225 Difference]: With dead ends: 99 [2022-11-02 20:50:53,200 INFO L226 Difference]: Without dead ends: 99 [2022-11-02 20:50:53,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:50:53,201 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 74 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:53,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 188 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:50:53,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-02 20:50:53,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 86. [2022-11-02 20:50:53,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 66 states have internal predecessors, (71), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-11-02 20:50:53,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2022-11-02 20:50:53,212 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 31 [2022-11-02 20:50:53,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:53,213 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2022-11-02 20:50:53,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:50:53,213 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2022-11-02 20:50:53,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-02 20:50:53,217 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:53,217 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:53,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-02 20:50:53,217 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-02 20:50:53,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:53,218 INFO L85 PathProgramCache]: Analyzing trace with hash 922787578, now seen corresponding path program 1 times [2022-11-02 20:50:53,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:53,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793517902] [2022-11-02 20:50:53,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:53,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:53,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:53,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:50:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:53,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:50:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:53,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:50:53,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:53,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-02 20:50:53,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:50:53,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:53,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793517902] [2022-11-02 20:50:53,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793517902] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:53,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:53,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:50:53,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020369219] [2022-11-02 20:50:53,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:53,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:50:53,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:53,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:50:53,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:50:53,292 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:50:53,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:53,322 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2022-11-02 20:50:53,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:50:53,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (4), 1 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 32 [2022-11-02 20:50:53,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:53,323 INFO L225 Difference]: With dead ends: 85 [2022-11-02 20:50:53,323 INFO L226 Difference]: Without dead ends: 85 [2022-11-02 20:50:53,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:50:53,324 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 15 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:53,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 132 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:50:53,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-02 20:50:53,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-11-02 20:50:53,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 58 states have (on average 1.206896551724138) internal successors, (70), 65 states have internal predecessors, (70), 13 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-11-02 20:50:53,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 98 transitions. [2022-11-02 20:50:53,339 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 98 transitions. Word has length 32 [2022-11-02 20:50:53,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:53,339 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 98 transitions. [2022-11-02 20:50:53,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:50:53,340 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 98 transitions. [2022-11-02 20:50:53,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-02 20:50:53,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:53,341 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:53,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-02 20:50:53,341 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-02 20:50:53,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:53,342 INFO L85 PathProgramCache]: Analyzing trace with hash 2035601245, now seen corresponding path program 1 times [2022-11-02 20:50:53,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:53,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264380868] [2022-11-02 20:50:53,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:53,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:53,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:53,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:50:53,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:53,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:50:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:53,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:50:53,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:53,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-02 20:50:53,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:53,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:50:53,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:53,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264380868] [2022-11-02 20:50:53,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264380868] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:53,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:50:53,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:50:53,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82812537] [2022-11-02 20:50:53,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:53,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:50:53,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:53,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:50:53,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:50:53,441 INFO L87 Difference]: Start difference. First operand 85 states and 98 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:50:53,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:53,509 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2022-11-02 20:50:53,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:50:53,510 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 1 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 34 [2022-11-02 20:50:53,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:53,511 INFO L225 Difference]: With dead ends: 84 [2022-11-02 20:50:53,511 INFO L226 Difference]: Without dead ends: 70 [2022-11-02 20:50:53,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:50:53,512 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 10 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:53,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 149 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:50:53,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-02 20:50:53,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-11-02 20:50:53,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 53 states have internal predecessors, (57), 12 states have call successors, (12), 5 states have call predecessors, (12), 6 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-11-02 20:50:53,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2022-11-02 20:50:53,517 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 34 [2022-11-02 20:50:53,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:53,517 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2022-11-02 20:50:53,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:50:53,518 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2022-11-02 20:50:53,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-02 20:50:53,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:53,519 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:53,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-02 20:50:53,519 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-02 20:50:53,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:53,520 INFO L85 PathProgramCache]: Analyzing trace with hash 287149833, now seen corresponding path program 1 times [2022-11-02 20:50:53,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:53,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061293674] [2022-11-02 20:50:53,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:53,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:53,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:53,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:50:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:53,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:50:53,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:53,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-02 20:50:53,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:53,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:50:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:53,729 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:50:53,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:53,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061293674] [2022-11-02 20:50:53,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061293674] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:53,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861818333] [2022-11-02 20:50:53,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:53,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:53,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:53,736 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:53,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:50:53,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:53,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:50:53,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:54,052 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:50:54,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:50:54,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861818333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:50:54,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:50:54,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 12 [2022-11-02 20:50:54,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319976037] [2022-11-02 20:50:54,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:50:54,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 20:50:54,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:54,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 20:50:54,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:50:54,055 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:50:54,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:54,244 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2022-11-02 20:50:54,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:50:54,244 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2022-11-02 20:50:54,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:54,250 INFO L225 Difference]: With dead ends: 87 [2022-11-02 20:50:54,250 INFO L226 Difference]: Without dead ends: 87 [2022-11-02 20:50:54,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:50:54,251 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 81 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:54,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 222 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:50:54,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-02 20:50:54,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 74. [2022-11-02 20:50:54,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 56 states have internal predecessors, (60), 12 states have call successors, (12), 6 states have call predecessors, (12), 7 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-11-02 20:50:54,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2022-11-02 20:50:54,257 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 39 [2022-11-02 20:50:54,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:54,258 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2022-11-02 20:50:54,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 20:50:54,258 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2022-11-02 20:50:54,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-02 20:50:54,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:54,261 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-02 20:50:54,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:54,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 20:50:54,481 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting checkErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-02 20:50:54,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:54,481 INFO L85 PathProgramCache]: Analyzing trace with hash 285681908, now seen corresponding path program 1 times [2022-11-02 20:50:54,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:54,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909734780] [2022-11-02 20:50:54,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:54,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:54,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:54,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:50:54,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:54,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:50:54,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:54,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-02 20:50:54,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:54,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:50:54,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:54,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-02 20:50:54,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:54,853 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:50:54,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:54,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909734780] [2022-11-02 20:50:54,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909734780] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:54,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211823855] [2022-11-02 20:50:54,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:54,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:54,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:54,855 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:54,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:50:54,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:54,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-02 20:50:54,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:55,297 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:50:55,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:55,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 26 [2022-11-02 20:50:55,697 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:50:55,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211823855] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:55,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:55,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 22 [2022-11-02 20:50:55,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545848616] [2022-11-02 20:50:55,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:55,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 20:50:55,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:55,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 20:50:55,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:50:55,700 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand has 23 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 10 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-02 20:50:56,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:50:56,466 INFO L93 Difference]: Finished difference Result 148 states and 179 transitions. [2022-11-02 20:50:56,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:50:56,468 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 10 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) Word has length 39 [2022-11-02 20:50:56,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:50:56,469 INFO L225 Difference]: With dead ends: 148 [2022-11-02 20:50:56,469 INFO L226 Difference]: Without dead ends: 146 [2022-11-02 20:50:56,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 20:50:56,472 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 119 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:50:56,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 467 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 409 Invalid, 0 Unknown, 37 Unchecked, 0.3s Time] [2022-11-02 20:50:56,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-02 20:50:56,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 122. [2022-11-02 20:50:56,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 82 states have (on average 1.2439024390243902) internal successors, (102), 92 states have internal predecessors, (102), 22 states have call successors, (22), 10 states have call predecessors, (22), 12 states have return successors, (27), 19 states have call predecessors, (27), 22 states have call successors, (27) [2022-11-02 20:50:56,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 151 transitions. [2022-11-02 20:50:56,482 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 151 transitions. Word has length 39 [2022-11-02 20:50:56,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:50:56,482 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 151 transitions. [2022-11-02 20:50:56,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 18 states have internal predecessors, (50), 10 states have call successors, (14), 5 states have call predecessors, (14), 3 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-02 20:50:56,483 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 151 transitions. [2022-11-02 20:50:56,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-02 20:50:56,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:50:56,486 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:50:56,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:50:56,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-02 20:50:56,700 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting checkErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-02 20:50:56,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:50:56,701 INFO L85 PathProgramCache]: Analyzing trace with hash -337593259, now seen corresponding path program 1 times [2022-11-02 20:50:56,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:50:56,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63547006] [2022-11-02 20:50:56,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:56,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:50:56,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:56,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:50:56,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:56,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:50:56,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:56,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-02 20:50:56,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:56,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:50:56,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:56,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-02 20:50:56,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:57,049 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:50:57,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:50:57,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63547006] [2022-11-02 20:50:57,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63547006] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:50:57,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406724418] [2022-11-02 20:50:57,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:50:57,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:50:57,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:50:57,051 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:50:57,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:50:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:50:57,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-02 20:50:57,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:50:57,564 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:50:57,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:50:57,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 31 treesize of output 27 [2022-11-02 20:50:58,128 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:50:58,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406724418] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:50:58,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:50:58,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 35 [2022-11-02 20:50:58,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824487988] [2022-11-02 20:50:58,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:50:58,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-02 20:50:58,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:50:58,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-02 20:50:58,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1133, Unknown=0, NotChecked=0, Total=1260 [2022-11-02 20:50:58,135 INFO L87 Difference]: Start difference. First operand 122 states and 151 transitions. Second operand has 36 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 10 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-02 20:51:00,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:51:00,205 INFO L93 Difference]: Finished difference Result 278 states and 351 transitions. [2022-11-02 20:51:00,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-02 20:51:00,206 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 10 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 41 [2022-11-02 20:51:00,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:51:00,207 INFO L225 Difference]: With dead ends: 278 [2022-11-02 20:51:00,207 INFO L226 Difference]: Without dead ends: 278 [2022-11-02 20:51:00,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=477, Invalid=3555, Unknown=0, NotChecked=0, Total=4032 [2022-11-02 20:51:00,209 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 317 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 258 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:51:00,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 733 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1013 Invalid, 0 Unknown, 258 Unchecked, 0.8s Time] [2022-11-02 20:51:00,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-11-02 20:51:00,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 167. [2022-11-02 20:51:00,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 116 states have (on average 1.2413793103448276) internal successors, (144), 127 states have internal predecessors, (144), 29 states have call successors, (29), 11 states have call predecessors, (29), 16 states have return successors, (45), 28 states have call predecessors, (45), 29 states have call successors, (45) [2022-11-02 20:51:00,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 218 transitions. [2022-11-02 20:51:00,234 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 218 transitions. Word has length 41 [2022-11-02 20:51:00,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:51:00,235 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 218 transitions. [2022-11-02 20:51:00,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 10 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-02 20:51:00,236 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 218 transitions. [2022-11-02 20:51:00,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-02 20:51:00,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:51:00,237 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-02 20:51:00,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:51:00,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-02 20:51:00,449 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-02 20:51:00,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:00,449 INFO L85 PathProgramCache]: Analyzing trace with hash -525112999, now seen corresponding path program 1 times [2022-11-02 20:51:00,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:00,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452784147] [2022-11-02 20:51:00,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:00,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:00,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:00,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:51:00,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:00,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:51:00,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:00,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-02 20:51:00,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:00,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:51:00,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:00,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-02 20:51:00,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:00,770 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:51:00,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:00,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452784147] [2022-11-02 20:51:00,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452784147] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:00,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530851617] [2022-11-02 20:51:00,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:00,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:00,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:00,777 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:00,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:51:00,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:00,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-02 20:51:00,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:00,876 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:51:02,933 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_5 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_5))) is different from true [2022-11-02 20:51:04,960 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_6 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_6))) is different from true [2022-11-02 20:51:06,999 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_7 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_7))) is different from true [2022-11-02 20:51:07,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 23 [2022-11-02 20:51:07,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 4 not checked. [2022-11-02 20:51:07,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:09,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530851617] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:09,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:51:09,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2022-11-02 20:51:09,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769692436] [2022-11-02 20:51:09,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:09,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-02 20:51:09,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:09,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-02 20:51:09,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=492, Unknown=3, NotChecked=138, Total=702 [2022-11-02 20:51:09,411 INFO L87 Difference]: Start difference. First operand 167 states and 218 transitions. Second operand has 22 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 5 states have call successors, (11), 7 states have call predecessors, (11), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-02 20:51:09,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:51:09,759 INFO L93 Difference]: Finished difference Result 169 states and 219 transitions. [2022-11-02 20:51:09,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 20:51:09,762 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 5 states have call successors, (11), 7 states have call predecessors, (11), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 46 [2022-11-02 20:51:09,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:51:09,764 INFO L225 Difference]: With dead ends: 169 [2022-11-02 20:51:09,764 INFO L226 Difference]: Without dead ends: 169 [2022-11-02 20:51:09,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 49 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=125, Invalid=814, Unknown=3, NotChecked=180, Total=1122 [2022-11-02 20:51:09,765 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 49 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 282 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:51:09,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 308 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 253 Invalid, 0 Unknown, 282 Unchecked, 0.2s Time] [2022-11-02 20:51:09,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-02 20:51:09,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-11-02 20:51:09,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 118 states have (on average 1.228813559322034) internal successors, (145), 128 states have internal predecessors, (145), 29 states have call successors, (29), 12 states have call predecessors, (29), 17 states have return successors, (45), 28 states have call predecessors, (45), 29 states have call successors, (45) [2022-11-02 20:51:09,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 219 transitions. [2022-11-02 20:51:09,776 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 219 transitions. Word has length 46 [2022-11-02 20:51:09,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:51:09,776 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 219 transitions. [2022-11-02 20:51:09,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 5 states have call successors, (11), 7 states have call predecessors, (11), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-02 20:51:09,776 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 219 transitions. [2022-11-02 20:51:09,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-02 20:51:09,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:51:09,777 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:09,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:51:10,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:10,004 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting checkErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-02 20:51:10,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:10,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1395918346, now seen corresponding path program 1 times [2022-11-02 20:51:10,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:10,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274514562] [2022-11-02 20:51:10,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:10,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:10,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:10,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:51:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:10,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:51:10,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:10,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-02 20:51:10,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:10,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:51:10,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:10,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-02 20:51:10,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:10,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-02 20:51:10,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:10,388 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-02 20:51:10,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:10,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274514562] [2022-11-02 20:51:10,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274514562] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:10,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152859932] [2022-11-02 20:51:10,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:10,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:10,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:10,391 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:10,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:51:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:10,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-02 20:51:10,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:10,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:51:10,762 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:51:10,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:11,270 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-02 20:51:11,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152859932] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:51:11,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:51:11,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-11-02 20:51:11,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266250252] [2022-11-02 20:51:11,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:11,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-02 20:51:11,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:11,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-02 20:51:11,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-11-02 20:51:11,272 INFO L87 Difference]: Start difference. First operand 169 states and 219 transitions. Second operand has 22 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 11 states have call successors, (19), 7 states have call predecessors, (19), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-11-02 20:51:12,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:51:12,043 INFO L93 Difference]: Finished difference Result 244 states and 312 transitions. [2022-11-02 20:51:12,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:51:12,044 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 11 states have call successors, (19), 7 states have call predecessors, (19), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 47 [2022-11-02 20:51:12,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:51:12,045 INFO L225 Difference]: With dead ends: 244 [2022-11-02 20:51:12,045 INFO L226 Difference]: Without dead ends: 244 [2022-11-02 20:51:12,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 91 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2022-11-02 20:51:12,046 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 218 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:51:12,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 352 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 476 Invalid, 0 Unknown, 58 Unchecked, 0.5s Time] [2022-11-02 20:51:12,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-02 20:51:12,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 172. [2022-11-02 20:51:12,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 121 states have (on average 1.1983471074380165) internal successors, (145), 130 states have internal predecessors, (145), 29 states have call successors, (29), 13 states have call predecessors, (29), 18 states have return successors, (45), 28 states have call predecessors, (45), 29 states have call successors, (45) [2022-11-02 20:51:12,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 219 transitions. [2022-11-02 20:51:12,057 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 219 transitions. Word has length 47 [2022-11-02 20:51:12,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:51:12,057 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 219 transitions. [2022-11-02 20:51:12,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 11 states have call successors, (19), 7 states have call predecessors, (19), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-11-02 20:51:12,058 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 219 transitions. [2022-11-02 20:51:12,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-02 20:51:12,058 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:51:12,058 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:51:12,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:51:12,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 20:51:12,272 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting checkErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-02 20:51:12,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:12,273 INFO L85 PathProgramCache]: Analyzing trace with hash 323795755, now seen corresponding path program 1 times [2022-11-02 20:51:12,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:12,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023710525] [2022-11-02 20:51:12,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:12,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:12,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:12,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:51:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:12,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:51:12,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:12,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-02 20:51:12,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:12,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:51:12,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:12,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-02 20:51:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:12,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-02 20:51:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-02 20:51:12,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:12,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023710525] [2022-11-02 20:51:12,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023710525] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:12,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993205540] [2022-11-02 20:51:12,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:12,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:12,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:12,561 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:12,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:51:12,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:12,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-02 20:51:12,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:12,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:51:13,005 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:51:13,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-02 20:51:13,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993205540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:51:13,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:51:13,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-11-02 20:51:13,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495634418] [2022-11-02 20:51:13,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:13,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 20:51:13,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:13,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 20:51:13,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:51:13,541 INFO L87 Difference]: Start difference. First operand 172 states and 219 transitions. Second operand has 23 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 11 states have call successors, (19), 7 states have call predecessors, (19), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-11-02 20:51:14,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:51:14,634 INFO L93 Difference]: Finished difference Result 273 states and 335 transitions. [2022-11-02 20:51:14,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-02 20:51:14,638 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 11 states have call successors, (19), 7 states have call predecessors, (19), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 48 [2022-11-02 20:51:14,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:51:14,640 INFO L225 Difference]: With dead ends: 273 [2022-11-02 20:51:14,640 INFO L226 Difference]: Without dead ends: 273 [2022-11-02 20:51:14,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 89 SyntacticMatches, 8 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=231, Invalid=1029, Unknown=0, NotChecked=0, Total=1260 [2022-11-02 20:51:14,641 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 294 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:51:14,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 484 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 641 Invalid, 0 Unknown, 72 Unchecked, 0.7s Time] [2022-11-02 20:51:14,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-11-02 20:51:14,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 178. [2022-11-02 20:51:14,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 128 states have (on average 1.171875) internal successors, (150), 134 states have internal predecessors, (150), 28 states have call successors, (28), 15 states have call predecessors, (28), 19 states have return successors, (38), 28 states have call predecessors, (38), 28 states have call successors, (38) [2022-11-02 20:51:14,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 216 transitions. [2022-11-02 20:51:14,653 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 216 transitions. Word has length 48 [2022-11-02 20:51:14,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:51:14,654 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 216 transitions. [2022-11-02 20:51:14,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 11 states have call successors, (19), 7 states have call predecessors, (19), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-11-02 20:51:14,654 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 216 transitions. [2022-11-02 20:51:14,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-02 20:51:14,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:51:14,655 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-02 20:51:14,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:51:14,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 20:51:14,869 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-02 20:51:14,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:14,869 INFO L85 PathProgramCache]: Analyzing trace with hash -2076994669, now seen corresponding path program 1 times [2022-11-02 20:51:14,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:14,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750413515] [2022-11-02 20:51:14,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:14,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:14,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:15,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:51:15,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:15,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:51:15,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:15,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:51:15,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:15,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:51:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:15,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:51:15,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:15,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:51:15,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:15,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-02 20:51:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 20:51:15,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:15,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750413515] [2022-11-02 20:51:15,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750413515] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:15,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516385248] [2022-11-02 20:51:15,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:15,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:15,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:15,451 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:15,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:51:15,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:15,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:51:15,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:15,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:51:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 20:51:15,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:51:16,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516385248] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:16,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:51:16,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2022-11-02 20:51:16,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026507998] [2022-11-02 20:51:16,327 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:51:16,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 20:51:16,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:51:16,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 20:51:16,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2022-11-02 20:51:16,329 INFO L87 Difference]: Start difference. First operand 178 states and 216 transitions. Second operand has 20 states, 16 states have (on average 2.75) internal successors, (44), 17 states have internal predecessors, (44), 8 states have call successors, (11), 1 states have call predecessors, (11), 4 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-02 20:51:17,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:51:17,523 INFO L93 Difference]: Finished difference Result 369 states and 470 transitions. [2022-11-02 20:51:17,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:51:17,524 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.75) internal successors, (44), 17 states have internal predecessors, (44), 8 states have call successors, (11), 1 states have call predecessors, (11), 4 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 54 [2022-11-02 20:51:17,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:51:17,526 INFO L225 Difference]: With dead ends: 369 [2022-11-02 20:51:17,526 INFO L226 Difference]: Without dead ends: 346 [2022-11-02 20:51:17,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=215, Invalid=1591, Unknown=0, NotChecked=0, Total=1806 [2022-11-02 20:51:17,527 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 127 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:51:17,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 769 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 20:51:17,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-11-02 20:51:17,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 234. [2022-11-02 20:51:17,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 176 states have (on average 1.1818181818181819) internal successors, (208), 177 states have internal predecessors, (208), 32 states have call successors, (32), 15 states have call predecessors, (32), 23 states have return successors, (51), 41 states have call predecessors, (51), 32 states have call successors, (51) [2022-11-02 20:51:17,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 291 transitions. [2022-11-02 20:51:17,539 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 291 transitions. Word has length 54 [2022-11-02 20:51:17,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:51:17,540 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 291 transitions. [2022-11-02 20:51:17,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.75) internal successors, (44), 17 states have internal predecessors, (44), 8 states have call successors, (11), 1 states have call predecessors, (11), 4 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-02 20:51:17,540 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 291 transitions. [2022-11-02 20:51:17,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-02 20:51:17,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:51:17,541 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-11-02 20:51:17,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:51:17,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-02 20:51:17,755 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-02 20:51:17,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:51:17,755 INFO L85 PathProgramCache]: Analyzing trace with hash 412534293, now seen corresponding path program 1 times [2022-11-02 20:51:17,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:51:17,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077849865] [2022-11-02 20:51:17,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:17,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:51:17,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:17,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:51:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:17,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:51:17,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:17,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-02 20:51:17,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:18,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:51:18,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:18,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:51:18,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:18,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:51:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:18,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-02 20:51:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:18,199 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 20:51:18,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:51:18,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077849865] [2022-11-02 20:51:18,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077849865] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:51:18,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271155291] [2022-11-02 20:51:18,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:51:18,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:51:18,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:51:18,201 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:51:18,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:51:18,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:51:18,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-02 20:51:18,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:51:18,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:51:20,301 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_6| Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_6|))) is different from true [2022-11-02 20:52:16,936 WARN L234 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:52:37,149 WARN L234 SmtUtils]: Spent 10.05s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:52:37,201 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 5 not checked. [2022-11-02 20:52:37,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:52:39,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271155291] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:52:39,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:52:39,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 18 [2022-11-02 20:52:39,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473849903] [2022-11-02 20:52:39,317 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:52:39,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:52:39,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:52:39,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:52:39,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=237, Unknown=25, NotChecked=32, Total=342 [2022-11-02 20:52:39,318 INFO L87 Difference]: Start difference. First operand 234 states and 291 transitions. Second operand has 18 states, 16 states have (on average 3.5) internal successors, (56), 18 states have internal predecessors, (56), 8 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-02 20:52:51,449 WARN L234 SmtUtils]: Spent 8.06s on a formula simplification. DAG size of input: 40 DAG size of output: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:53:11,607 WARN L234 SmtUtils]: Spent 6.03s on a formula simplification. DAG size of input: 34 DAG size of output: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:53:29,762 WARN L234 SmtUtils]: Spent 8.06s on a formula simplification. DAG size of input: 41 DAG size of output: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:53:29,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:53:29,859 INFO L93 Difference]: Finished difference Result 345 states and 437 transitions. [2022-11-02 20:53:29,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-02 20:53:29,859 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.5) internal successors, (56), 18 states have internal predecessors, (56), 8 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 54 [2022-11-02 20:53:29,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:53:29,861 INFO L225 Difference]: With dead ends: 345 [2022-11-02 20:53:29,862 INFO L226 Difference]: Without dead ends: 329 [2022-11-02 20:53:29,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 131.2s TimeCoverageRelationStatistics Valid=85, Invalid=482, Unknown=37, NotChecked=46, Total=650 [2022-11-02 20:53:29,863 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 40 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:53:29,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 326 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 140 Invalid, 0 Unknown, 264 Unchecked, 0.1s Time] [2022-11-02 20:53:29,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-11-02 20:53:29,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 232. [2022-11-02 20:53:29,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 174 states have (on average 1.1781609195402298) internal successors, (205), 175 states have internal predecessors, (205), 32 states have call successors, (32), 16 states have call predecessors, (32), 23 states have return successors, (50), 40 states have call predecessors, (50), 32 states have call successors, (50) [2022-11-02 20:53:29,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 287 transitions. [2022-11-02 20:53:29,873 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 287 transitions. Word has length 54 [2022-11-02 20:53:29,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:53:29,873 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 287 transitions. [2022-11-02 20:53:29,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.5) internal successors, (56), 18 states have internal predecessors, (56), 8 states have call successors, (12), 4 states have call predecessors, (12), 6 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-02 20:53:29,873 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 287 transitions. [2022-11-02 20:53:29,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-02 20:53:29,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:53:29,874 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:29,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:53:30,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:30,092 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting checkErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-02 20:53:30,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:30,093 INFO L85 PathProgramCache]: Analyzing trace with hash 806764368, now seen corresponding path program 1 times [2022-11-02 20:53:30,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:30,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637683973] [2022-11-02 20:53:30,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:30,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:30,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:30,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:53:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:30,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:53:30,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:30,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-02 20:53:30,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:30,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:53:30,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:30,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-02 20:53:30,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:30,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-02 20:53:30,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:30,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-11-02 20:53:30,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:30,303 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-02 20:53:30,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:30,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637683973] [2022-11-02 20:53:30,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637683973] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:53:30,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213822507] [2022-11-02 20:53:30,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:30,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:30,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:30,306 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:53:30,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:53:30,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:30,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-02 20:53:30,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:30,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:53:32,414 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_28 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_28))) is different from true [2022-11-02 20:53:34,438 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_29 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_29))) is different from true [2022-11-02 20:53:34,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 23 [2022-11-02 20:53:34,512 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:53:34,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:53:34,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213822507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:53:34,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:53:34,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8] total 13 [2022-11-02 20:53:34,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182941876] [2022-11-02 20:53:34,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:53:34,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:53:34,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:34,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:53:34,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=89, Unknown=2, NotChecked=38, Total=156 [2022-11-02 20:53:34,515 INFO L87 Difference]: Start difference. First operand 232 states and 287 transitions. Second operand has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-02 20:53:34,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:53:34,574 INFO L93 Difference]: Finished difference Result 187 states and 225 transitions. [2022-11-02 20:53:34,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:53:34,575 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 56 [2022-11-02 20:53:34,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:53:34,576 INFO L225 Difference]: With dead ends: 187 [2022-11-02 20:53:34,576 INFO L226 Difference]: Without dead ends: 187 [2022-11-02 20:53:34,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=36, Invalid=126, Unknown=2, NotChecked=46, Total=210 [2022-11-02 20:53:34,577 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 12 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:53:34,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 204 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 155 Unchecked, 0.0s Time] [2022-11-02 20:53:34,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-11-02 20:53:34,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2022-11-02 20:53:34,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 140 states have (on average 1.1571428571428573) internal successors, (162), 141 states have internal predecessors, (162), 25 states have call successors, (25), 13 states have call predecessors, (25), 19 states have return successors, (38), 32 states have call predecessors, (38), 25 states have call successors, (38) [2022-11-02 20:53:34,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 225 transitions. [2022-11-02 20:53:34,584 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 225 transitions. Word has length 56 [2022-11-02 20:53:34,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:53:34,584 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 225 transitions. [2022-11-02 20:53:34,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-02 20:53:34,584 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 225 transitions. [2022-11-02 20:53:34,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-02 20:53:34,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:53:34,585 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:34,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-02 20:53:34,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-11-02 20:53:34,801 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting checkErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-02 20:53:34,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:34,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1896699969, now seen corresponding path program 1 times [2022-11-02 20:53:34,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:34,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138793319] [2022-11-02 20:53:34,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:34,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:34,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:35,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:53:35,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:35,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:53:35,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:35,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-02 20:53:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:35,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:53:35,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:35,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-02 20:53:35,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:35,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:53:35,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:35,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:53:35,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:35,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:53:35,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:35,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-02 20:53:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:35,417 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-02 20:53:35,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:35,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138793319] [2022-11-02 20:53:35,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138793319] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:53:35,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249542421] [2022-11-02 20:53:35,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:35,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:35,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:35,420 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:53:35,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:53:35,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:35,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 20:53:35,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:36,003 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-02 20:53:36,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:53:36,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249542421] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:53:36,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:53:36,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2022-11-02 20:53:36,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28508034] [2022-11-02 20:53:36,519 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:53:36,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-02 20:53:36,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:36,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-02 20:53:36,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2022-11-02 20:53:36,521 INFO L87 Difference]: Start difference. First operand 187 states and 225 transitions. Second operand has 30 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 25 states have internal predecessors, (57), 12 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (15), 9 states have call predecessors, (15), 10 states have call successors, (15) [2022-11-02 20:53:38,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:53:38,747 INFO L93 Difference]: Finished difference Result 263 states and 321 transitions. [2022-11-02 20:53:38,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-02 20:53:38,748 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 25 states have internal predecessors, (57), 12 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (15), 9 states have call predecessors, (15), 10 states have call successors, (15) Word has length 71 [2022-11-02 20:53:38,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:53:38,749 INFO L225 Difference]: With dead ends: 263 [2022-11-02 20:53:38,749 INFO L226 Difference]: Without dead ends: 234 [2022-11-02 20:53:38,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=441, Invalid=2981, Unknown=0, NotChecked=0, Total=3422 [2022-11-02 20:53:38,751 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 308 mSDsluCounter, 680 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:53:38,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 736 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1070 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-02 20:53:38,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-02 20:53:38,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 170. [2022-11-02 20:53:38,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.1574803149606299) internal successors, (147), 127 states have internal predecessors, (147), 24 states have call successors, (24), 13 states have call predecessors, (24), 16 states have return successors, (32), 29 states have call predecessors, (32), 24 states have call successors, (32) [2022-11-02 20:53:38,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 203 transitions. [2022-11-02 20:53:38,761 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 203 transitions. Word has length 71 [2022-11-02 20:53:38,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:53:38,762 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 203 transitions. [2022-11-02 20:53:38,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 25 states have internal predecessors, (57), 12 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (15), 9 states have call predecessors, (15), 10 states have call successors, (15) [2022-11-02 20:53:38,762 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 203 transitions. [2022-11-02 20:53:38,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-02 20:53:38,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:53:38,766 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:38,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:53:38,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:38,987 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting checkErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-02 20:53:38,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:38,987 INFO L85 PathProgramCache]: Analyzing trace with hash 91261635, now seen corresponding path program 1 times [2022-11-02 20:53:38,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:38,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147057082] [2022-11-02 20:53:38,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:38,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:39,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:39,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:53:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:39,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:53:39,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:39,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-02 20:53:39,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:39,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:53:39,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:39,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-11-02 20:53:39,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:39,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:53:39,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:39,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-02 20:53:39,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:39,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:53:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:39,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-02 20:53:39,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:39,611 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-02 20:53:39,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:39,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147057082] [2022-11-02 20:53:39,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147057082] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:53:39,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833752549] [2022-11-02 20:53:39,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:39,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:39,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:39,613 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:53:39,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:53:39,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:39,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-02 20:53:39,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:40,154 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-02 20:53:40,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:53:40,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833752549] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:53:40,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:53:40,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 27 [2022-11-02 20:53:40,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557835166] [2022-11-02 20:53:40,637 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:53:40,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:53:40,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:40,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:53:40,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 20:53:40,638 INFO L87 Difference]: Start difference. First operand 170 states and 203 transitions. Second operand has 28 states, 22 states have (on average 2.5) internal successors, (55), 23 states have internal predecessors, (55), 11 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2022-11-02 20:53:42,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:53:42,284 INFO L93 Difference]: Finished difference Result 232 states and 281 transitions. [2022-11-02 20:53:42,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-02 20:53:42,285 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 22 states have (on average 2.5) internal successors, (55), 23 states have internal predecessors, (55), 11 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) Word has length 71 [2022-11-02 20:53:42,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:53:42,287 INFO L225 Difference]: With dead ends: 232 [2022-11-02 20:53:42,287 INFO L226 Difference]: Without dead ends: 232 [2022-11-02 20:53:42,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=381, Invalid=2481, Unknown=0, NotChecked=0, Total=2862 [2022-11-02 20:53:42,289 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 239 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:53:42,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 550 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 20:53:42,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-11-02 20:53:42,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 170. [2022-11-02 20:53:42,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.1496062992125984) internal successors, (146), 127 states have internal predecessors, (146), 24 states have call successors, (24), 13 states have call predecessors, (24), 16 states have return successors, (32), 29 states have call predecessors, (32), 24 states have call successors, (32) [2022-11-02 20:53:42,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 202 transitions. [2022-11-02 20:53:42,297 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 202 transitions. Word has length 71 [2022-11-02 20:53:42,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:53:42,297 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 202 transitions. [2022-11-02 20:53:42,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 22 states have (on average 2.5) internal successors, (55), 23 states have internal predecessors, (55), 11 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2022-11-02 20:53:42,297 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 202 transitions. [2022-11-02 20:53:42,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-02 20:53:42,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:53:42,298 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:42,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:53:42,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:42,513 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting checkErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2022-11-02 20:53:42,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:53:42,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1341702710, now seen corresponding path program 2 times [2022-11-02 20:53:42,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:53:42,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862911170] [2022-11-02 20:53:42,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:53:42,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:53:42,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:42,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-02 20:53:42,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:42,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-02 20:53:42,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:42,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-02 20:53:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:42,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 20:53:42,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:42,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-11-02 20:53:42,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:42,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-11-02 20:53:42,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:42,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-02 20:53:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:42,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-11-02 20:53:42,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:42,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-02 20:53:42,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:53:42,741 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-02 20:53:42,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:53:42,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862911170] [2022-11-02 20:53:42,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862911170] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:53:42,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645707479] [2022-11-02 20:53:42,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:53:42,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:53:42,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:53:42,745 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:53:42,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:53:42,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:53:42,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:53:42,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-02 20:53:42,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:53:42,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:53:44,867 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_34 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_34))) is different from true [2022-11-02 20:53:46,890 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_35 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_35))) is different from true [2022-11-02 20:53:48,921 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_37 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_37))) is different from true [2022-11-02 20:53:50,951 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_38 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_38))) is different from true [2022-11-02 20:53:51,009 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 23 [2022-11-02 20:53:51,029 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 63 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 8 not checked. [2022-11-02 20:53:51,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:53:53,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645707479] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:53:53,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:53:53,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 15 [2022-11-02 20:53:53,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764173362] [2022-11-02 20:53:53,121 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:53:53,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 20:53:53,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:53:53,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 20:53:53,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=152, Unknown=4, NotChecked=108, Total=306 [2022-11-02 20:53:53,123 INFO L87 Difference]: Start difference. First operand 170 states and 202 transitions. Second operand has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 5 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-02 20:53:55,164 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 ((as const (Array Int Int)) 0))) (and (exists ((v_check_~a.base_BEFORE_CALL_37 Int)) (= .cse0 (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_37))) (exists ((v_check_~a.base_BEFORE_CALL_34 Int)) (= .cse0 (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_34))))) is different from true [2022-11-02 20:53:57,186 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 ((as const (Array Int Int)) 0))) (and (exists ((v_check_~a.base_BEFORE_CALL_38 Int)) (= .cse0 (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_38))) (exists ((v_check_~a.base_BEFORE_CALL_35 Int)) (= .cse0 (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_35))))) is different from true [2022-11-02 20:53:57,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:53:57,233 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2022-11-02 20:53:57,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:53:57,233 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 5 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 73 [2022-11-02 20:53:57,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:53:57,234 INFO L225 Difference]: With dead ends: 46 [2022-11-02 20:53:57,234 INFO L226 Difference]: Without dead ends: 0 [2022-11-02 20:53:57,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 111 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=76, Invalid=248, Unknown=6, NotChecked=222, Total=552 [2022-11-02 20:53:57,235 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:53:57,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 121 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 152 Unchecked, 0.0s Time] [2022-11-02 20:53:57,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-02 20:53:57,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-02 20:53:57,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:53:57,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-02 20:53:57,236 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2022-11-02 20:53:57,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:53:57,237 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-02 20:53:57,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 5 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-02 20:53:57,237 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-02 20:53:57,237 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-02 20:53:57,240 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 17 remaining) [2022-11-02 20:53:57,240 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 17 remaining) [2022-11-02 20:53:57,241 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 17 remaining) [2022-11-02 20:53:57,241 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 17 remaining) [2022-11-02 20:53:57,241 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE (12 of 17 remaining) [2022-11-02 20:53:57,241 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE (11 of 17 remaining) [2022-11-02 20:53:57,241 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE (10 of 17 remaining) [2022-11-02 20:53:57,241 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (9 of 17 remaining) [2022-11-02 20:53:57,242 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 17 remaining) [2022-11-02 20:53:57,242 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 17 remaining) [2022-11-02 20:53:57,242 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 17 remaining) [2022-11-02 20:53:57,242 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 17 remaining) [2022-11-02 20:53:57,242 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 17 remaining) [2022-11-02 20:53:57,243 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 17 remaining) [2022-11-02 20:53:57,243 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 17 remaining) [2022-11-02 20:53:57,243 INFO L805 garLoopResultBuilder]: Registering result SAFE for location checkErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 17 remaining) [2022-11-02 20:53:57,243 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 17 remaining) [2022-11-02 20:53:57,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:53:57,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-02 20:53:57,466 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:53:57,468 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-02 20:53:57,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 08:53:57 BoogieIcfgContainer [2022-11-02 20:53:57,471 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-02 20:53:57,471 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-02 20:53:57,471 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-02 20:53:57,472 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-02 20:53:57,472 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:50:48" (3/4) ... [2022-11-02 20:53:57,475 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-02 20:53:57,482 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2022-11-02 20:53:57,482 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2022-11-02 20:53:57,483 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-02 20:53:57,489 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 23 nodes and edges [2022-11-02 20:53:57,490 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2022-11-02 20:53:57,490 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-11-02 20:53:57,490 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-02 20:53:57,534 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/witness.graphml [2022-11-02 20:53:57,534 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-02 20:53:57,535 INFO L158 Benchmark]: Toolchain (without parser) took 189628.33ms. Allocated memory was 142.6MB in the beginning and 264.2MB in the end (delta: 121.6MB). Free memory was 107.6MB in the beginning and 101.1MB in the end (delta: 6.5MB). Peak memory consumption was 128.7MB. Max. memory is 16.1GB. [2022-11-02 20:53:57,537 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 77.6MB. Free memory was 34.6MB in the beginning and 34.5MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 20:53:57,538 INFO L158 Benchmark]: CACSL2BoogieTranslator took 309.33ms. Allocated memory is still 142.6MB. Free memory was 107.6MB in the beginning and 115.9MB in the end (delta: -8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-02 20:53:57,541 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.47ms. Allocated memory is still 142.6MB. Free memory was 115.9MB in the beginning and 114.4MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 20:53:57,542 INFO L158 Benchmark]: Boogie Preprocessor took 29.98ms. Allocated memory is still 142.6MB. Free memory was 114.4MB in the beginning and 113.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-02 20:53:57,542 INFO L158 Benchmark]: RCFGBuilder took 530.85ms. Allocated memory is still 142.6MB. Free memory was 113.3MB in the beginning and 97.9MB in the end (delta: 15.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-02 20:53:57,542 INFO L158 Benchmark]: TraceAbstraction took 188648.09ms. Allocated memory was 142.6MB in the beginning and 264.2MB in the end (delta: 121.6MB). Free memory was 97.6MB in the beginning and 104.2MB in the end (delta: -6.6MB). Peak memory consumption was 117.1MB. Max. memory is 16.1GB. [2022-11-02 20:53:57,542 INFO L158 Benchmark]: Witness Printer took 63.30ms. Allocated memory is still 264.2MB. Free memory was 104.2MB in the beginning and 101.1MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-02 20:53:57,544 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 77.6MB. Free memory was 34.6MB in the beginning and 34.5MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 309.33ms. Allocated memory is still 142.6MB. Free memory was 107.6MB in the beginning and 115.9MB in the end (delta: -8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.47ms. Allocated memory is still 142.6MB. Free memory was 115.9MB in the beginning and 114.4MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 29.98ms. Allocated memory is still 142.6MB. Free memory was 114.4MB in the beginning and 113.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 530.85ms. Allocated memory is still 142.6MB. Free memory was 113.3MB in the beginning and 97.9MB in the end (delta: 15.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 188648.09ms. Allocated memory was 142.6MB in the beginning and 264.2MB in the end (delta: 121.6MB). Free memory was 97.6MB in the beginning and 104.2MB in the end (delta: -6.6MB). Peak memory consumption was 117.1MB. Max. memory is 16.1GB. * Witness Printer took 63.30ms. Allocated memory is still 264.2MB. Free memory was 104.2MB in the beginning and 101.1MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 52]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 40]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 11]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 64 locations, 17 error locations. Started 1 CEGAR loops. OverallTime: 188.6s, OverallIterations: 23, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 67.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2287 SdHoareTripleChecker+Valid, 6.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2270 mSDsluCounter, 7482 SdHoareTripleChecker+Invalid, 5.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1278 IncrementalHoareTripleChecker+Unchecked, 6305 mSDsCounter, 931 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6866 IncrementalHoareTripleChecker+Invalid, 9075 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 931 mSolverCounterUnsat, 1177 mSDtfsCounter, 6866 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1493 GetRequests, 975 SyntacticMatches, 32 SemanticMatches, 486 ConstructedPredicates, 12 IntricatePredicates, 0 DeprecatedPredicates, 2901 ImplicationChecksByTransitivity, 168.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=234occurred in iteration=18, InterpolantAutomatonStates: 304, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 23 MinimizatonAttempts, 737 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 116.8s InterpolantComputationTime, 1576 NumberOfCodeBlocks, 1576 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 1712 ConstructedInterpolants, 105 QuantifiedInterpolants, 9968 SizeOfPredicates, 108 NumberOfNonLiveVariables, 2699 ConjunctsInSsa, 280 ConjunctsInUnsatCore, 39 InterpolantComputations, 13 PerfectInterpolantSequences, 804/977 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 17 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-02 20:53:57,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ec1d19f-4f7b-4c1c-9af4-91990073bb50/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE