./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/duplets.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f 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_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/duplets.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8 --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 ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 --- 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-e04fb08 [2022-11-16 12:14:35,374 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:14:35,377 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:14:35,404 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:14:35,404 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:14:35,406 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:14:35,407 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:14:35,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:14:35,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:14:35,413 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:14:35,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:14:35,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:14:35,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:14:35,418 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:14:35,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:14:35,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:14:35,422 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:14:35,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:14:35,426 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:14:35,428 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:14:35,430 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:14:35,439 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:14:35,441 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:14:35,444 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:14:35,449 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:14:35,459 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:14:35,459 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:14:35,461 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:14:35,461 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:14:35,462 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:14:35,463 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:14:35,464 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:14:35,465 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:14:35,467 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:14:35,469 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:14:35,470 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:14:35,471 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:14:35,471 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:14:35,471 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:14:35,472 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:14:35,473 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:14:35,474 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 12:14:35,502 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:14:35,502 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:14:35,503 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:14:35,503 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:14:35,504 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:14:35,504 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:14:35,505 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:14:35,505 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:14:35,505 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:14:35,505 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:14:35,506 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:14:35,506 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:14:35,506 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:14:35,506 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:14:35,507 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:14:35,507 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 12:14:35,507 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 12:14:35,507 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 12:14:35,507 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:14:35,508 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 12:14:35,508 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:14:35,508 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:14:35,508 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:14:35,509 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:14:35,509 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:14:35,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:14:35,509 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:14:35,510 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:14:35,510 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:14:35,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:14:35,510 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_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 [2022-11-16 12:14:35,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:14:35,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:14:35,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:14:35,918 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:14:35,919 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:14:35,921 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/verifythis/duplets.c [2022-11-16 12:14:36,000 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/data/1f19f1381/c9afc13bfe2d44af8c96e3f9472a42c5/FLAG0da26932c [2022-11-16 12:14:36,542 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:14:36,543 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/sv-benchmarks/c/verifythis/duplets.c [2022-11-16 12:14:36,551 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/data/1f19f1381/c9afc13bfe2d44af8c96e3f9472a42c5/FLAG0da26932c [2022-11-16 12:14:36,883 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/data/1f19f1381/c9afc13bfe2d44af8c96e3f9472a42c5 [2022-11-16 12:14:36,887 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:14:36,889 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:14:36,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:14:36,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:14:36,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:14:36,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:14:36" (1/1) ... [2022-11-16 12:14:36,898 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32cab755 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:36, skipping insertion in model container [2022-11-16 12:14:36,898 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:14:36" (1/1) ... [2022-11-16 12:14:36,908 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:14:36,926 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:14:37,241 WARN L229 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_c64b2b42-0775-4454-87f0-409542737339/sv-benchmarks/c/verifythis/duplets.c[485,498] [2022-11-16 12:14:37,274 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:14:37,300 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:14:37,318 WARN L229 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_c64b2b42-0775-4454-87f0-409542737339/sv-benchmarks/c/verifythis/duplets.c[485,498] [2022-11-16 12:14:37,345 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:14:37,377 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:14:37,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:37 WrapperNode [2022-11-16 12:14:37,380 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:14:37,382 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:14:37,382 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:14:37,383 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:14:37,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:37" (1/1) ... [2022-11-16 12:14:37,417 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:37" (1/1) ... [2022-11-16 12:14:37,460 INFO L138 Inliner]: procedures = 21, calls = 43, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 123 [2022-11-16 12:14:37,463 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:14:37,464 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:14:37,464 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:14:37,465 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:14:37,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:37" (1/1) ... [2022-11-16 12:14:37,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:37" (1/1) ... [2022-11-16 12:14:37,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:37" (1/1) ... [2022-11-16 12:14:37,497 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:37" (1/1) ... [2022-11-16 12:14:37,511 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:37" (1/1) ... [2022-11-16 12:14:37,523 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:37" (1/1) ... [2022-11-16 12:14:37,527 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:37" (1/1) ... [2022-11-16 12:14:37,536 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:37" (1/1) ... [2022-11-16 12:14:37,538 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:14:37,539 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:14:37,540 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:14:37,540 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:14:37,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:37" (1/1) ... [2022-11-16 12:14:37,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:14:37,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:14:37,587 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:14:37,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:14:37,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:14:37,630 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-16 12:14:37,631 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-16 12:14:37,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:14:37,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:14:37,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:14:37,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 12:14:37,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:14:37,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:14:37,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:14:37,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-16 12:14:37,633 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-16 12:14:37,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:14:37,750 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:14:37,753 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:14:38,267 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:14:38,278 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:14:38,278 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 12:14:38,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:14:38 BoogieIcfgContainer [2022-11-16 12:14:38,281 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:14:38,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:14:38,285 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:14:38,290 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:14:38,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:14:36" (1/3) ... [2022-11-16 12:14:38,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@356b0d3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:14:38, skipping insertion in model container [2022-11-16 12:14:38,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:37" (2/3) ... [2022-11-16 12:14:38,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@356b0d3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:14:38, skipping insertion in model container [2022-11-16 12:14:38,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:14:38" (3/3) ... [2022-11-16 12:14:38,294 INFO L112 eAbstractionObserver]: Analyzing ICFG duplets.c [2022-11-16 12:14:38,320 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:14:38,321 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 37 error locations. [2022-11-16 12:14:38,386 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:14:38,395 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;@72177fab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:14:38,395 INFO L358 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2022-11-16 12:14:38,401 INFO L276 IsEmpty]: Start isEmpty. Operand has 101 states, 52 states have (on average 1.8846153846153846) internal successors, (98), 89 states have internal predecessors, (98), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 12:14:38,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-16 12:14:38,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:38,414 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:14:38,415 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:14:38,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:38,422 INFO L85 PathProgramCache]: Analyzing trace with hash 802624587, now seen corresponding path program 1 times [2022-11-16 12:14:38,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:38,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231389253] [2022-11-16 12:14:38,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:38,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:38,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:38,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:14:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:38,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:14:38,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:38,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:14:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:38,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:14:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:38,803 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:14:38,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:38,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231389253] [2022-11-16 12:14:38,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231389253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:38,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:14:38,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:14:38,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898194136] [2022-11-16 12:14:38,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:38,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:14:38,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:38,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:14:38,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:14:38,878 INFO L87 Difference]: Start difference. First operand has 101 states, 52 states have (on average 1.8846153846153846) internal successors, (98), 89 states have internal predecessors, (98), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 12:14:38,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:38,930 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2022-11-16 12:14:38,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:14:38,933 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2022-11-16 12:14:38,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:38,945 INFO L225 Difference]: With dead ends: 101 [2022-11-16 12:14:38,946 INFO L226 Difference]: Without dead ends: 99 [2022-11-16 12:14:38,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:14:38,954 INFO L413 NwaCegarLoop]: 112 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, 112 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 [2022-11-16 12:14:38,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:14:38,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-16 12:14:39,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-11-16 12:14:39,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 51 states have (on average 1.803921568627451) internal successors, (92), 87 states have internal predecessors, (92), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 12:14:39,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 110 transitions. [2022-11-16 12:14:39,049 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 110 transitions. Word has length 26 [2022-11-16 12:14:39,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:39,049 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 110 transitions. [2022-11-16 12:14:39,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 12:14:39,051 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 110 transitions. [2022-11-16 12:14:39,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-16 12:14:39,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:39,055 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:14:39,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:14:39,056 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:14:39,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:39,059 INFO L85 PathProgramCache]: Analyzing trace with hash -649564341, now seen corresponding path program 1 times [2022-11-16 12:14:39,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:39,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435507214] [2022-11-16 12:14:39,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:39,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:39,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:39,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:14:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:39,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:14:39,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:39,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:14:39,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:39,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:14:39,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:39,424 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:14:39,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:39,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435507214] [2022-11-16 12:14:39,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435507214] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:39,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:14:39,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:14:39,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948724741] [2022-11-16 12:14:39,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:39,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:14:39,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:39,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:14:39,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:14:39,429 INFO L87 Difference]: Start difference. First operand 99 states and 110 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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) [2022-11-16 12:14:39,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:39,743 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2022-11-16 12:14:39,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:14:39,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 26 [2022-11-16 12:14:39,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:39,752 INFO L225 Difference]: With dead ends: 97 [2022-11-16 12:14:39,754 INFO L226 Difference]: Without dead ends: 97 [2022-11-16 12:14:39,755 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 [2022-11-16 12:14:39,758 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 150 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:39,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 92 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:14:39,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-16 12:14:39,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-11-16 12:14:39,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 51 states have (on average 1.7647058823529411) internal successors, (90), 85 states have internal predecessors, (90), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 12:14:39,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2022-11-16 12:14:39,787 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 26 [2022-11-16 12:14:39,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:39,790 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2022-11-16 12:14:39,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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) [2022-11-16 12:14:39,791 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2022-11-16 12:14:39,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-16 12:14:39,792 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:39,792 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:14:39,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:14:39,793 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:14:39,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:39,793 INFO L85 PathProgramCache]: Analyzing trace with hash -649564340, now seen corresponding path program 1 times [2022-11-16 12:14:39,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:39,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149386749] [2022-11-16 12:14:39,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:39,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:39,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:40,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:14:40,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:40,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:14:40,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:40,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:14:40,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:40,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:14:40,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:40,292 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:14:40,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:40,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149386749] [2022-11-16 12:14:40,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149386749] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:14:40,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450218878] [2022-11-16 12:14:40,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:40,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:40,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:14:40,298 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:14:40,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:14:40,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:40,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 12:14:40,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:14:40,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:14:40,868 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 12:14:40,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:14:41,364 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:14:41,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450218878] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:14:41,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:14:41,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 11 [2022-11-16 12:14:41,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944898662] [2022-11-16 12:14:41,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:14:41,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:14:41,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:41,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:14:41,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:14:41,367 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-16 12:14:41,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:41,679 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2022-11-16 12:14:41,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:14:41,680 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) Word has length 26 [2022-11-16 12:14:41,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:41,685 INFO L225 Difference]: With dead ends: 100 [2022-11-16 12:14:41,685 INFO L226 Difference]: Without dead ends: 100 [2022-11-16 12:14:41,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:14:41,692 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 16 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:41,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 474 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 114 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2022-11-16 12:14:41,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-16 12:14:41,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-11-16 12:14:41,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 54 states have (on average 1.7037037037037037) internal successors, (92), 87 states have internal predecessors, (92), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 12:14:41,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2022-11-16 12:14:41,710 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 26 [2022-11-16 12:14:41,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:41,711 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2022-11-16 12:14:41,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 12 states have internal predecessors, (21), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-16 12:14:41,711 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2022-11-16 12:14:41,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-16 12:14:41,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:41,712 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:14:41,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:14:41,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:41,920 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:14:41,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:41,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1338341894, now seen corresponding path program 1 times [2022-11-16 12:14:41,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:41,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890983141] [2022-11-16 12:14:41,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:41,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:42,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:14:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:42,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:14:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:42,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:14:42,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:42,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:14:42,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:42,251 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:14:42,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:42,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890983141] [2022-11-16 12:14:42,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890983141] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:14:42,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991541025] [2022-11-16 12:14:42,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:42,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:42,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:14:42,255 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:14:42,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:14:42,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:42,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 12:14:42,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:14:42,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:14:42,549 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 12:14:42,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:14:43,002 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:14:43,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991541025] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:14:43,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:14:43,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 11 [2022-11-16 12:14:43,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966203408] [2022-11-16 12:14:43,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:14:43,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:14:43,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:43,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:14:43,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:14:43,013 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 12 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 12 states have internal predecessors, (23), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-16 12:14:43,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:43,416 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2022-11-16 12:14:43,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:14:43,417 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 12 states have internal predecessors, (23), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 27 [2022-11-16 12:14:43,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:43,421 INFO L225 Difference]: With dead ends: 103 [2022-11-16 12:14:43,421 INFO L226 Difference]: Without dead ends: 103 [2022-11-16 12:14:43,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:14:43,426 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 10 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:43,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 511 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 179 Invalid, 0 Unknown, 45 Unchecked, 0.3s Time] [2022-11-16 12:14:43,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-16 12:14:43,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-11-16 12:14:43,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 57 states have (on average 1.6491228070175439) internal successors, (94), 89 states have internal predecessors, (94), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 12:14:43,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 112 transitions. [2022-11-16 12:14:43,455 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 112 transitions. Word has length 27 [2022-11-16 12:14:43,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:43,456 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 112 transitions. [2022-11-16 12:14:43,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 12 states have internal predecessors, (23), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-16 12:14:43,459 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 112 transitions. [2022-11-16 12:14:43,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-16 12:14:43,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:43,461 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:14:43,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:14:43,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:43,668 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:14:43,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:43,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1665569650, now seen corresponding path program 1 times [2022-11-16 12:14:43,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:43,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519284426] [2022-11-16 12:14:43,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:43,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:43,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:44,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:14:44,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:44,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:14:44,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:44,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:14:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:44,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:14:44,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:44,132 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:14:44,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:44,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519284426] [2022-11-16 12:14:44,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519284426] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:44,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:14:44,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:14:44,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450970760] [2022-11-16 12:14:44,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:44,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:14:44,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:44,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:14:44,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:14:44,147 INFO L87 Difference]: Start difference. First operand 103 states and 112 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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) [2022-11-16 12:14:44,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:44,338 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2022-11-16 12:14:44,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:14:44,339 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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 31 [2022-11-16 12:14:44,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:44,340 INFO L225 Difference]: With dead ends: 98 [2022-11-16 12:14:44,340 INFO L226 Difference]: Without dead ends: 98 [2022-11-16 12:14:44,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:14:44,342 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 265 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:44,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 97 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:14:44,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-16 12:14:44,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-11-16 12:14:44,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 57 states have (on average 1.5614035087719298) internal successors, (89), 84 states have internal predecessors, (89), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 12:14:44,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 107 transitions. [2022-11-16 12:14:44,350 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 107 transitions. Word has length 31 [2022-11-16 12:14:44,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:44,350 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 107 transitions. [2022-11-16 12:14:44,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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) [2022-11-16 12:14:44,351 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 107 transitions. [2022-11-16 12:14:44,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-16 12:14:44,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:44,352 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:14:44,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 12:14:44,353 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:14:44,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:44,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1665569649, now seen corresponding path program 1 times [2022-11-16 12:14:44,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:44,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367248397] [2022-11-16 12:14:44,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:44,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:44,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:14:44,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:44,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:14:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:44,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:14:44,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:44,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:14:44,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:44,752 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:14:44,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:44,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367248397] [2022-11-16 12:14:44,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367248397] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:44,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:14:44,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:14:44,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794235853] [2022-11-16 12:14:44,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:44,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:14:44,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:44,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:14:44,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:14:44,756 INFO L87 Difference]: Start difference. First operand 98 states and 107 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 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) [2022-11-16 12:14:45,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:45,136 INFO L93 Difference]: Finished difference Result 163 states and 181 transitions. [2022-11-16 12:14:45,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:14:45,137 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 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 31 [2022-11-16 12:14:45,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:45,139 INFO L225 Difference]: With dead ends: 163 [2022-11-16 12:14:45,139 INFO L226 Difference]: Without dead ends: 163 [2022-11-16 12:14:45,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:14:45,140 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 331 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:45,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 162 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:14:45,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-16 12:14:45,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 103. [2022-11-16 12:14:45,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 63 states have (on average 1.5555555555555556) internal successors, (98), 89 states have internal predecessors, (98), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 12:14:45,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 116 transitions. [2022-11-16 12:14:45,149 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 116 transitions. Word has length 31 [2022-11-16 12:14:45,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:45,150 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 116 transitions. [2022-11-16 12:14:45,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 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) [2022-11-16 12:14:45,151 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 116 transitions. [2022-11-16 12:14:45,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-16 12:14:45,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:45,152 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:14:45,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 12:14:45,153 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:14:45,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:45,154 INFO L85 PathProgramCache]: Analyzing trace with hash -93051589, now seen corresponding path program 1 times [2022-11-16 12:14:45,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:45,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905900114] [2022-11-16 12:14:45,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:45,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:45,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:45,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:14:45,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:45,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:14:45,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:45,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:14:45,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:45,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:14:45,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:45,824 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:14:45,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:45,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905900114] [2022-11-16 12:14:45,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905900114] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:45,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:14:45,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-16 12:14:45,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143513915] [2022-11-16 12:14:45,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:45,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:14:45,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:45,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:14:45,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:14:45,832 INFO L87 Difference]: Start difference. First operand 103 states and 116 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 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) [2022-11-16 12:14:46,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:46,897 INFO L93 Difference]: Finished difference Result 209 states and 233 transitions. [2022-11-16 12:14:46,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:14:46,898 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 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 [2022-11-16 12:14:46,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:46,900 INFO L225 Difference]: With dead ends: 209 [2022-11-16 12:14:46,900 INFO L226 Difference]: Without dead ends: 209 [2022-11-16 12:14:46,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:14:46,901 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 479 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:46,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 196 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 12:14:46,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-11-16 12:14:46,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 102. [2022-11-16 12:14:46,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 88 states have internal predecessors, (96), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 12:14:46,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 114 transitions. [2022-11-16 12:14:46,910 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 114 transitions. Word has length 32 [2022-11-16 12:14:46,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:46,911 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 114 transitions. [2022-11-16 12:14:46,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 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) [2022-11-16 12:14:46,911 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 114 transitions. [2022-11-16 12:14:46,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-16 12:14:46,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:46,913 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:14:46,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 12:14:46,913 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:14:46,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:46,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1505969179, now seen corresponding path program 1 times [2022-11-16 12:14:46,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:46,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017056002] [2022-11-16 12:14:46,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:46,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:47,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:14:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:47,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:14:47,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:47,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:14:47,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:47,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:14:47,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:47,146 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:14:47,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:47,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017056002] [2022-11-16 12:14:47,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017056002] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:47,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:14:47,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:14:47,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054990020] [2022-11-16 12:14:47,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:47,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:14:47,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:47,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:14:47,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:14:47,152 INFO L87 Difference]: Start difference. First operand 102 states and 114 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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) [2022-11-16 12:14:47,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:47,532 INFO L93 Difference]: Finished difference Result 159 states and 176 transitions. [2022-11-16 12:14:47,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:14:47,533 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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 35 [2022-11-16 12:14:47,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:47,535 INFO L225 Difference]: With dead ends: 159 [2022-11-16 12:14:47,535 INFO L226 Difference]: Without dead ends: 159 [2022-11-16 12:14:47,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:14:47,536 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 148 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:47,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 454 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:14:47,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-11-16 12:14:47,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 102. [2022-11-16 12:14:47,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 63 states have (on average 1.507936507936508) internal successors, (95), 88 states have internal predecessors, (95), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 12:14:47,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 113 transitions. [2022-11-16 12:14:47,544 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 113 transitions. Word has length 35 [2022-11-16 12:14:47,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:47,545 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 113 transitions. [2022-11-16 12:14:47,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 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) [2022-11-16 12:14:47,546 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 113 transitions. [2022-11-16 12:14:47,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-16 12:14:47,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:47,547 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:14:47,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 12:14:47,548 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:14:47,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:47,549 INFO L85 PathProgramCache]: Analyzing trace with hash 770561975, now seen corresponding path program 1 times [2022-11-16 12:14:47,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:47,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776806391] [2022-11-16 12:14:47,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:47,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:47,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:47,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:14:47,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:47,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:14:47,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:47,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:14:47,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:47,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:14:47,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:47,642 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:14:47,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:47,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776806391] [2022-11-16 12:14:47,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776806391] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:14:47,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959753587] [2022-11-16 12:14:47,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:47,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:47,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:14:47,645 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:14:47,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:14:47,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:47,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:14:47,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:14:47,787 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:14:47,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:14:47,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959753587] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:47,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:14:47,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 6 [2022-11-16 12:14:47,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033553218] [2022-11-16 12:14:47,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:47,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:14:47,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:47,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:14:47,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:14:47,793 INFO L87 Difference]: Start difference. First operand 102 states and 113 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 12:14:47,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:47,916 INFO L93 Difference]: Finished difference Result 271 states and 304 transitions. [2022-11-16 12:14:47,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:14:47,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2022-11-16 12:14:47,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:47,922 INFO L225 Difference]: With dead ends: 271 [2022-11-16 12:14:47,922 INFO L226 Difference]: Without dead ends: 271 [2022-11-16 12:14:47,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:14:47,925 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 293 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:47,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 318 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:14:47,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-11-16 12:14:47,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 106. [2022-11-16 12:14:47,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 67 states have (on average 1.507462686567164) internal successors, (101), 92 states have internal predecessors, (101), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 12:14:47,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 119 transitions. [2022-11-16 12:14:47,934 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 119 transitions. Word has length 34 [2022-11-16 12:14:47,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:47,935 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 119 transitions. [2022-11-16 12:14:47,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 12:14:47,935 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 119 transitions. [2022-11-16 12:14:47,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-16 12:14:47,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:47,938 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:14:47,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-16 12:14:48,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-16 12:14:48,145 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:14:48,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:48,145 INFO L85 PathProgramCache]: Analyzing trace with hash 771735643, now seen corresponding path program 1 times [2022-11-16 12:14:48,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:48,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594707646] [2022-11-16 12:14:48,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:48,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:48,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:48,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:14:48,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:48,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:14:48,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:48,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:14:48,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:48,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:14:48,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:48,283 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:14:48,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:48,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594707646] [2022-11-16 12:14:48,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594707646] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:48,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:14:48,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:14:48,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12559794] [2022-11-16 12:14:48,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:48,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:14:48,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:48,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:14:48,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:14:48,286 INFO L87 Difference]: Start difference. First operand 106 states and 119 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 12:14:48,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:48,343 INFO L93 Difference]: Finished difference Result 105 states and 118 transitions. [2022-11-16 12:14:48,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:14:48,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2022-11-16 12:14:48,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:48,345 INFO L225 Difference]: With dead ends: 105 [2022-11-16 12:14:48,345 INFO L226 Difference]: Without dead ends: 105 [2022-11-16 12:14:48,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:14:48,347 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 57 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:48,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 91 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:14:48,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-16 12:14:48,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-16 12:14:48,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 67 states have (on average 1.492537313432836) internal successors, (100), 91 states have internal predecessors, (100), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 12:14:48,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 118 transitions. [2022-11-16 12:14:48,352 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 118 transitions. Word has length 34 [2022-11-16 12:14:48,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:48,353 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 118 transitions. [2022-11-16 12:14:48,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 12:14:48,353 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 118 transitions. [2022-11-16 12:14:48,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-16 12:14:48,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:48,354 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:14:48,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 12:14:48,355 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:14:48,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:48,355 INFO L85 PathProgramCache]: Analyzing trace with hash 771735644, now seen corresponding path program 1 times [2022-11-16 12:14:48,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:48,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019608940] [2022-11-16 12:14:48,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:48,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:48,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:48,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:14:48,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:48,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:14:48,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:48,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:14:48,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:48,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:14:48,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:48,554 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:14:48,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:48,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019608940] [2022-11-16 12:14:48,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019608940] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:48,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:14:48,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:14:48,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990551779] [2022-11-16 12:14:48,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:48,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:14:48,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:48,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:14:48,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:14:48,557 INFO L87 Difference]: Start difference. First operand 105 states and 118 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 12:14:48,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:48,620 INFO L93 Difference]: Finished difference Result 104 states and 117 transitions. [2022-11-16 12:14:48,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:14:48,621 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2022-11-16 12:14:48,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:48,622 INFO L225 Difference]: With dead ends: 104 [2022-11-16 12:14:48,622 INFO L226 Difference]: Without dead ends: 104 [2022-11-16 12:14:48,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:14:48,623 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 58 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:48,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 89 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:14:48,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-16 12:14:48,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-11-16 12:14:48,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 67 states have (on average 1.4776119402985075) internal successors, (99), 90 states have internal predecessors, (99), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 12:14:48,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2022-11-16 12:14:48,629 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 34 [2022-11-16 12:14:48,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:48,629 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2022-11-16 12:14:48,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 12:14:48,630 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2022-11-16 12:14:48,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-16 12:14:48,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:48,631 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:14:48,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 12:14:48,631 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:14:48,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:48,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1845998826, now seen corresponding path program 1 times [2022-11-16 12:14:48,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:48,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480396143] [2022-11-16 12:14:48,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:48,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:48,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:48,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:14:48,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:48,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:14:48,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:48,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:14:48,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:48,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:14:48,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:14:48,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:48,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480396143] [2022-11-16 12:14:48,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480396143] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:48,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:14:48,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:14:48,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434460771] [2022-11-16 12:14:48,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:48,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:14:48,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:48,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:14:48,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:14:48,725 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 12:14:48,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:48,783 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2022-11-16 12:14:48,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:14:48,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2022-11-16 12:14:48,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:48,785 INFO L225 Difference]: With dead ends: 103 [2022-11-16 12:14:48,785 INFO L226 Difference]: Without dead ends: 103 [2022-11-16 12:14:48,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:14:48,786 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 54 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:48,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 90 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:14:48,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-16 12:14:48,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-11-16 12:14:48,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 67 states have (on average 1.462686567164179) internal successors, (98), 89 states have internal predecessors, (98), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 12:14:48,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 116 transitions. [2022-11-16 12:14:48,792 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 116 transitions. Word has length 35 [2022-11-16 12:14:48,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:48,792 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 116 transitions. [2022-11-16 12:14:48,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 12:14:48,793 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 116 transitions. [2022-11-16 12:14:48,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-16 12:14:48,793 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:48,793 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:14:48,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 12:14:48,794 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:14:48,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:48,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1845998825, now seen corresponding path program 1 times [2022-11-16 12:14:48,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:48,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067629630] [2022-11-16 12:14:48,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:48,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:48,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:14:48,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:48,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:14:48,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:48,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:14:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:48,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:14:48,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:48,929 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:14:48,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:48,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067629630] [2022-11-16 12:14:48,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067629630] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:48,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:14:48,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:14:48,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192223992] [2022-11-16 12:14:48,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:48,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:14:48,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:48,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:14:48,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:14:48,933 INFO L87 Difference]: Start difference. First operand 103 states and 116 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 12:14:48,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:48,997 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2022-11-16 12:14:48,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:14:48,998 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2022-11-16 12:14:48,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:48,999 INFO L225 Difference]: With dead ends: 102 [2022-11-16 12:14:48,999 INFO L226 Difference]: Without dead ends: 102 [2022-11-16 12:14:48,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:14:49,000 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 55 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:49,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 88 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:14:49,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-16 12:14:49,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-11-16 12:14:49,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 67 states have (on average 1.4477611940298507) internal successors, (97), 88 states have internal predecessors, (97), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 12:14:49,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 115 transitions. [2022-11-16 12:14:49,006 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 115 transitions. Word has length 35 [2022-11-16 12:14:49,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:49,006 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 115 transitions. [2022-11-16 12:14:49,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 12:14:49,007 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 115 transitions. [2022-11-16 12:14:49,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-16 12:14:49,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:49,008 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:14:49,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 12:14:49,008 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:14:49,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:49,009 INFO L85 PathProgramCache]: Analyzing trace with hash 385735491, now seen corresponding path program 1 times [2022-11-16 12:14:49,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:49,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378627551] [2022-11-16 12:14:49,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:49,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:49,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:49,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:14:49,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:49,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:14:49,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:49,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:14:49,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:49,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:14:49,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:49,690 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:14:49,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:49,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378627551] [2022-11-16 12:14:49,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378627551] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:49,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:14:49,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-16 12:14:49,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138634329] [2022-11-16 12:14:49,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:49,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:14:49,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:49,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:14:49,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:14:49,694 INFO L87 Difference]: Start difference. First operand 102 states and 115 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 12:14:50,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:50,963 INFO L93 Difference]: Finished difference Result 155 states and 173 transitions. [2022-11-16 12:14:50,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:14:50,964 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-11-16 12:14:50,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:50,965 INFO L225 Difference]: With dead ends: 155 [2022-11-16 12:14:50,965 INFO L226 Difference]: Without dead ends: 155 [2022-11-16 12:14:50,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-11-16 12:14:50,966 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 600 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:50,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [600 Valid, 360 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 12:14:50,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-16 12:14:50,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 102. [2022-11-16 12:14:50,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 67 states have (on average 1.4328358208955223) internal successors, (96), 88 states have internal predecessors, (96), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 12:14:50,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 114 transitions. [2022-11-16 12:14:50,970 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 114 transitions. Word has length 38 [2022-11-16 12:14:50,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:50,971 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 114 transitions. [2022-11-16 12:14:50,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 12:14:50,971 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 114 transitions. [2022-11-16 12:14:50,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-16 12:14:50,972 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:50,972 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-11-16 12:14:50,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 12:14:50,972 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:14:50,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:50,973 INFO L85 PathProgramCache]: Analyzing trace with hash -462248216, now seen corresponding path program 1 times [2022-11-16 12:14:50,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:50,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693620718] [2022-11-16 12:14:50,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:50,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:50,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:51,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:14:51,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:51,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:14:51,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:51,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:14:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:51,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:14:51,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:51,134 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:14:51,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:51,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693620718] [2022-11-16 12:14:51,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693620718] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:14:51,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331716616] [2022-11-16 12:14:51,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:51,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:51,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:14:51,137 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:14:51,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:14:51,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:51,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 12:14:51,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:14:51,282 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:14:51,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:14:51,349 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:14:51,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331716616] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:14:51,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:14:51,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2022-11-16 12:14:51,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145964774] [2022-11-16 12:14:51,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:14:51,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 12:14:51,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:51,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 12:14:51,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:14:51,352 INFO L87 Difference]: Start difference. First operand 102 states and 114 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 12:14:51,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:51,562 INFO L93 Difference]: Finished difference Result 330 states and 373 transitions. [2022-11-16 12:14:51,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:14:51,563 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 39 [2022-11-16 12:14:51,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:51,565 INFO L225 Difference]: With dead ends: 330 [2022-11-16 12:14:51,565 INFO L226 Difference]: Without dead ends: 330 [2022-11-16 12:14:51,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:14:51,569 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 417 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:51,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 488 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:14:51,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-11-16 12:14:51,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 115. [2022-11-16 12:14:51,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 80 states have (on average 1.45) internal successors, (116), 101 states have internal predecessors, (116), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-16 12:14:51,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 134 transitions. [2022-11-16 12:14:51,583 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 134 transitions. Word has length 39 [2022-11-16 12:14:51,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:51,583 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 134 transitions. [2022-11-16 12:14:51,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 12:14:51,584 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 134 transitions. [2022-11-16 12:14:51,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-16 12:14:51,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:51,585 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:14:51,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:14:51,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 12:14:51,792 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:14:51,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:51,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1532500018, now seen corresponding path program 1 times [2022-11-16 12:14:51,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:51,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559717573] [2022-11-16 12:14:51,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:51,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:51,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:51,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:14:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:51,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:14:51,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:51,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:14:51,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:51,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:14:51,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:51,923 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:14:51,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:51,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559717573] [2022-11-16 12:14:51,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559717573] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:51,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:14:51,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 12:14:51,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42713438] [2022-11-16 12:14:51,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:51,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 12:14:51,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:51,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 12:14:51,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:14:51,926 INFO L87 Difference]: Start difference. First operand 115 states and 134 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 12:14:51,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:51,994 INFO L93 Difference]: Finished difference Result 168 states and 192 transitions. [2022-11-16 12:14:51,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:14:51,995 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2022-11-16 12:14:51,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:51,997 INFO L225 Difference]: With dead ends: 168 [2022-11-16 12:14:51,997 INFO L226 Difference]: Without dead ends: 168 [2022-11-16 12:14:51,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:14:51,999 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 94 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:51,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 460 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:14:52,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-16 12:14:52,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 121. [2022-11-16 12:14:52,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 84 states have (on average 1.4285714285714286) internal successors, (120), 106 states have internal predecessors, (120), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 12:14:52,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 140 transitions. [2022-11-16 12:14:52,008 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 140 transitions. Word has length 41 [2022-11-16 12:14:52,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:52,009 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 140 transitions. [2022-11-16 12:14:52,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 12:14:52,009 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 140 transitions. [2022-11-16 12:14:52,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-16 12:14:52,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:52,010 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:14:52,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-16 12:14:52,011 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:14:52,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:52,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1396025844, now seen corresponding path program 1 times [2022-11-16 12:14:52,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:52,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078872831] [2022-11-16 12:14:52,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:52,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:52,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:52,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:14:52,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:52,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:14:52,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:52,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:14:52,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:52,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:14:52,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:52,088 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:14:52,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:52,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078872831] [2022-11-16 12:14:52,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078872831] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:14:52,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609030892] [2022-11-16 12:14:52,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:52,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:52,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:14:52,091 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:14:52,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:14:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:52,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:14:52,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:14:52,236 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:14:52,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:14:52,301 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:14:52,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609030892] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:14:52,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:14:52,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-11-16 12:14:52,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259699171] [2022-11-16 12:14:52,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:14:52,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:14:52,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:52,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:14:52,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:14:52,306 INFO L87 Difference]: Start difference. First operand 121 states and 140 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 12:14:52,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:52,379 INFO L93 Difference]: Finished difference Result 168 states and 190 transitions. [2022-11-16 12:14:52,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:14:52,380 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2022-11-16 12:14:52,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:52,382 INFO L225 Difference]: With dead ends: 168 [2022-11-16 12:14:52,382 INFO L226 Difference]: Without dead ends: 168 [2022-11-16 12:14:52,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 91 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:14:52,383 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 115 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:52,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 347 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:14:52,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-16 12:14:52,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 121. [2022-11-16 12:14:52,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 84 states have (on average 1.4047619047619047) internal successors, (118), 106 states have internal predecessors, (118), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 12:14:52,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 138 transitions. [2022-11-16 12:14:52,412 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 138 transitions. Word has length 43 [2022-11-16 12:14:52,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:52,414 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 138 transitions. [2022-11-16 12:14:52,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 12:14:52,415 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 138 transitions. [2022-11-16 12:14:52,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-16 12:14:52,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:52,417 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:14:52,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:14:52,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 12:14:52,624 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:14:52,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:52,625 INFO L85 PathProgramCache]: Analyzing trace with hash -441136327, now seen corresponding path program 1 times [2022-11-16 12:14:52,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:52,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637950427] [2022-11-16 12:14:52,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:52,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:52,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:14:52,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:52,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:14:52,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:52,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:14:52,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:52,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:14:52,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:52,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-16 12:14:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:52,767 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:14:52,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:52,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637950427] [2022-11-16 12:14:52,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637950427] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:52,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:14:52,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:14:52,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361929912] [2022-11-16 12:14:52,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:52,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:14:52,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:52,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:14:52,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:14:52,772 INFO L87 Difference]: Start difference. First operand 121 states and 138 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 12:14:52,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:52,870 INFO L93 Difference]: Finished difference Result 117 states and 134 transitions. [2022-11-16 12:14:52,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:14:52,871 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2022-11-16 12:14:52,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:52,874 INFO L225 Difference]: With dead ends: 117 [2022-11-16 12:14:52,874 INFO L226 Difference]: Without dead ends: 117 [2022-11-16 12:14:52,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:14:52,875 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 101 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:52,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 114 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:14:52,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-16 12:14:52,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-11-16 12:14:52,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 102 states have internal predecessors, (114), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 12:14:52,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 134 transitions. [2022-11-16 12:14:52,884 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 134 transitions. Word has length 43 [2022-11-16 12:14:52,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:52,884 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 134 transitions. [2022-11-16 12:14:52,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 12:14:52,885 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 134 transitions. [2022-11-16 12:14:52,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-16 12:14:52,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:52,886 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:14:52,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-16 12:14:52,887 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:14:52,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:52,887 INFO L85 PathProgramCache]: Analyzing trace with hash -441136326, now seen corresponding path program 1 times [2022-11-16 12:14:52,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:52,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484622980] [2022-11-16 12:14:52,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:52,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:52,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:53,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:14:53,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:53,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:14:53,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:53,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:14:53,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:53,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:14:53,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:53,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-16 12:14:53,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:53,044 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:14:53,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:53,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484622980] [2022-11-16 12:14:53,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484622980] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:53,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:14:53,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:14:53,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937562784] [2022-11-16 12:14:53,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:53,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:14:53,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:53,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:14:53,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:14:53,049 INFO L87 Difference]: Start difference. First operand 117 states and 134 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 12:14:53,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:53,151 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2022-11-16 12:14:53,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:14:53,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2022-11-16 12:14:53,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:53,155 INFO L225 Difference]: With dead ends: 113 [2022-11-16 12:14:53,156 INFO L226 Difference]: Without dead ends: 113 [2022-11-16 12:14:53,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:14:53,157 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 93 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:53,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 102 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:14:53,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-16 12:14:53,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-11-16 12:14:53,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 84 states have (on average 1.3095238095238095) internal successors, (110), 98 states have internal predecessors, (110), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 12:14:53,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 130 transitions. [2022-11-16 12:14:53,165 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 130 transitions. Word has length 43 [2022-11-16 12:14:53,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:53,166 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 130 transitions. [2022-11-16 12:14:53,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 12:14:53,166 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 130 transitions. [2022-11-16 12:14:53,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-16 12:14:53,167 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:53,167 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-11-16 12:14:53,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-16 12:14:53,168 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:14:53,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:53,168 INFO L85 PathProgramCache]: Analyzing trace with hash 791981655, now seen corresponding path program 2 times [2022-11-16 12:14:53,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:53,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903809258] [2022-11-16 12:14:53,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:53,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:53,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:53,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:14:53,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:53,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:14:53,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:53,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:14:53,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:53,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:14:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:53,428 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:14:53,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:53,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903809258] [2022-11-16 12:14:53,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903809258] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:14:53,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011025429] [2022-11-16 12:14:53,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:14:53,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:53,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:14:53,431 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:14:53,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:14:53,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:14:53,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:14:53,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 12:14:53,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:14:53,912 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-16 12:14:53,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:14:54,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:14:54,442 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-16 12:14:54,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011025429] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:14:54,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:14:54,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 26 [2022-11-16 12:14:54,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770841798] [2022-11-16 12:14:54,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:14:54,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 12:14:54,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:54,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 12:14:54,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2022-11-16 12:14:54,450 INFO L87 Difference]: Start difference. First operand 113 states and 130 transitions. Second operand has 27 states, 26 states have (on average 2.576923076923077) internal successors, (67), 27 states have internal predecessors, (67), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-16 12:14:56,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:14:56,752 INFO L93 Difference]: Finished difference Result 345 states and 394 transitions. [2022-11-16 12:14:56,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 12:14:56,753 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.576923076923077) internal successors, (67), 27 states have internal predecessors, (67), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 44 [2022-11-16 12:14:56,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:14:56,759 INFO L225 Difference]: With dead ends: 345 [2022-11-16 12:14:56,759 INFO L226 Difference]: Without dead ends: 345 [2022-11-16 12:14:56,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=521, Invalid=1459, Unknown=0, NotChecked=0, Total=1980 [2022-11-16 12:14:56,764 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 1328 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1328 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:14:56,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1328 Valid, 940 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 943 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-16 12:14:56,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-11-16 12:14:56,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 101. [2022-11-16 12:14:56,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 74 states have (on average 1.2432432432432432) internal successors, (92), 86 states have internal predecessors, (92), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 12:14:56,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2022-11-16 12:14:56,774 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 44 [2022-11-16 12:14:56,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:14:56,774 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2022-11-16 12:14:56,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.576923076923077) internal successors, (67), 27 states have internal predecessors, (67), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-16 12:14:56,775 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2022-11-16 12:14:56,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 12:14:56,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:14:56,776 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-11-16 12:14:56,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:14:56,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:56,984 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:14:56,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:56,984 INFO L85 PathProgramCache]: Analyzing trace with hash 2123889354, now seen corresponding path program 2 times [2022-11-16 12:14:56,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:56,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230637847] [2022-11-16 12:14:56,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:56,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:57,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:58,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:14:58,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:58,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:14:58,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:58,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:14:58,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:58,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:14:58,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:58,568 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 12:14:58,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:58,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230637847] [2022-11-16 12:14:58,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230637847] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:14:58,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384208602] [2022-11-16 12:14:58,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:14:58,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:58,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:14:58,571 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:14:58,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:14:58,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:14:58,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:14:58,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-16 12:14:58,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:14:58,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:14:58,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 12:14:59,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:14:59,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-16 12:14:59,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-11-16 12:15:04,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:15:04,158 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:15:04,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 62 [2022-11-16 12:15:04,641 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 12:15:04,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:15:05,227 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:15:05,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 515 treesize of output 447 [2022-11-16 12:15:08,297 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 12:15:08,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384208602] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:15:08,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:15:08,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-11-16 12:15:08,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643604855] [2022-11-16 12:15:08,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:15:08,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-16 12:15:08,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:08,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-16 12:15:08,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1272, Unknown=2, NotChecked=0, Total=1406 [2022-11-16 12:15:08,303 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand has 38 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 38 states have internal predecessors, (58), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-16 12:15:10,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:10,442 INFO L93 Difference]: Finished difference Result 150 states and 168 transitions. [2022-11-16 12:15:10,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:15:10,443 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 38 states have internal predecessors, (58), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) Word has length 46 [2022-11-16 12:15:10,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:10,444 INFO L225 Difference]: With dead ends: 150 [2022-11-16 12:15:10,444 INFO L226 Difference]: Without dead ends: 150 [2022-11-16 12:15:10,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=233, Invalid=2021, Unknown=2, NotChecked=0, Total=2256 [2022-11-16 12:15:10,446 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 92 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1128 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:10,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 1128 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 416 Invalid, 0 Unknown, 147 Unchecked, 0.5s Time] [2022-11-16 12:15:10,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-11-16 12:15:10,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 106. [2022-11-16 12:15:10,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 79 states have (on average 1.240506329113924) internal successors, (98), 91 states have internal predecessors, (98), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 12:15:10,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 118 transitions. [2022-11-16 12:15:10,458 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 118 transitions. Word has length 46 [2022-11-16 12:15:10,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:10,459 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 118 transitions. [2022-11-16 12:15:10,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 38 states have internal predecessors, (58), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-16 12:15:10,460 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 118 transitions. [2022-11-16 12:15:10,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-16 12:15:10,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:10,461 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-11-16 12:15:10,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:15:10,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-16 12:15:10,669 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:15:10,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:10,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1818294190, now seen corresponding path program 1 times [2022-11-16 12:15:10,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:10,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762251830] [2022-11-16 12:15:10,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:10,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:10,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:11,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:15:11,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:11,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:15:11,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:11,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:15:11,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:11,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:15:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:11,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-16 12:15:11,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:11,105 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:15:11,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:11,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762251830] [2022-11-16 12:15:11,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762251830] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:11,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:11,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-16 12:15:11,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791602123] [2022-11-16 12:15:11,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:11,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:15:11,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:11,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:15:11,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:15:11,109 INFO L87 Difference]: Start difference. First operand 106 states and 118 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 12:15:11,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:11,635 INFO L93 Difference]: Finished difference Result 191 states and 216 transitions. [2022-11-16 12:15:11,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:15:11,636 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 49 [2022-11-16 12:15:11,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:11,638 INFO L225 Difference]: With dead ends: 191 [2022-11-16 12:15:11,638 INFO L226 Difference]: Without dead ends: 191 [2022-11-16 12:15:11,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:15:11,639 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 161 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:11,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 502 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:15:11,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-16 12:15:11,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 119. [2022-11-16 12:15:11,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 91 states have (on average 1.2307692307692308) internal successors, (112), 103 states have internal predecessors, (112), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-16 12:15:11,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 134 transitions. [2022-11-16 12:15:11,645 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 134 transitions. Word has length 49 [2022-11-16 12:15:11,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:11,646 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 134 transitions. [2022-11-16 12:15:11,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 12:15:11,646 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 134 transitions. [2022-11-16 12:15:11,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-16 12:15:11,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:11,648 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:11,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-16 12:15:11,648 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:15:11,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:11,649 INFO L85 PathProgramCache]: Analyzing trace with hash 103710603, now seen corresponding path program 1 times [2022-11-16 12:15:11,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:11,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666506934] [2022-11-16 12:15:11,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:11,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:11,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:12,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:15:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:12,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:15:12,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:12,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:15:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:12,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:15:12,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:12,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-16 12:15:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:12,327 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:15:12,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:12,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666506934] [2022-11-16 12:15:12,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666506934] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:15:12,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416883950] [2022-11-16 12:15:12,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:12,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:15:12,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:15:12,330 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:15:12,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:15:12,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:12,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-16 12:15:12,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:15:12,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:15:12,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 12:15:12,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 12:15:12,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-16 12:15:12,964 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:15:12,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:15:13,282 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:15:13,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-16 12:15:13,296 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:15:13,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2022-11-16 12:15:13,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 12:15:13,558 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:15:13,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416883950] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:15:13,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:15:13,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 34 [2022-11-16 12:15:13,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049578681] [2022-11-16 12:15:13,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:15:13,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 12:15:13,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:13,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 12:15:13,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=979, Unknown=10, NotChecked=0, Total=1122 [2022-11-16 12:15:13,562 INFO L87 Difference]: Start difference. First operand 119 states and 134 transitions. Second operand has 34 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 33 states have internal predecessors, (64), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-16 12:15:16,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:16,394 INFO L93 Difference]: Finished difference Result 227 states and 256 transitions. [2022-11-16 12:15:16,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-16 12:15:16,395 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 33 states have internal predecessors, (64), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 51 [2022-11-16 12:15:16,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:16,397 INFO L225 Difference]: With dead ends: 227 [2022-11-16 12:15:16,397 INFO L226 Difference]: Without dead ends: 227 [2022-11-16 12:15:16,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=643, Invalid=2887, Unknown=10, NotChecked=0, Total=3540 [2022-11-16 12:15:16,402 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 827 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:16,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [830 Valid, 1043 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 947 Invalid, 0 Unknown, 26 Unchecked, 0.9s Time] [2022-11-16 12:15:16,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-16 12:15:16,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 124. [2022-11-16 12:15:16,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 94 states have (on average 1.2234042553191489) internal successors, (115), 107 states have internal predecessors, (115), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-16 12:15:16,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 139 transitions. [2022-11-16 12:15:16,414 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 139 transitions. Word has length 51 [2022-11-16 12:15:16,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:16,415 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 139 transitions. [2022-11-16 12:15:16,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 33 states have internal predecessors, (64), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-16 12:15:16,415 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 139 transitions. [2022-11-16 12:15:16,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-16 12:15:16,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:16,422 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:16,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:15:16,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:15:16,632 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:15:16,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:16,632 INFO L85 PathProgramCache]: Analyzing trace with hash 678594683, now seen corresponding path program 3 times [2022-11-16 12:15:16,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:16,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835163734] [2022-11-16 12:15:16,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:16,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:16,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:16,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:15:16,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:16,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:15:16,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:16,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:15:16,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:16,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:15:16,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:16,759 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:15:16,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:16,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835163734] [2022-11-16 12:15:16,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835163734] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:15:16,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174276002] [2022-11-16 12:15:16,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:15:16,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:15:16,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:15:16,762 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:15:16,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:15:16,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 12:15:16,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:15:16,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 12:15:16,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:15:16,966 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:15:16,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:15:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 12:15:17,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174276002] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:15:17,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:15:17,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-11-16 12:15:17,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396749620] [2022-11-16 12:15:17,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:15:17,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:15:17,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:17,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:15:17,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:15:17,047 INFO L87 Difference]: Start difference. First operand 124 states and 139 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 12:15:17,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:17,252 INFO L93 Difference]: Finished difference Result 216 states and 242 transitions. [2022-11-16 12:15:17,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:15:17,253 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2022-11-16 12:15:17,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:17,254 INFO L225 Difference]: With dead ends: 216 [2022-11-16 12:15:17,255 INFO L226 Difference]: Without dead ends: 216 [2022-11-16 12:15:17,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 104 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:15:17,256 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 271 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:17,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 475 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:15:17,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-11-16 12:15:17,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 124. [2022-11-16 12:15:17,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 94 states have (on average 1.2127659574468086) internal successors, (114), 107 states have internal predecessors, (114), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-16 12:15:17,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 138 transitions. [2022-11-16 12:15:17,267 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 138 transitions. Word has length 51 [2022-11-16 12:15:17,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:17,268 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 138 transitions. [2022-11-16 12:15:17,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 12:15:17,268 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 138 transitions. [2022-11-16 12:15:17,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-16 12:15:17,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:17,271 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:17,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:15:17,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-16 12:15:17,478 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:15:17,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:17,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1565086581, now seen corresponding path program 1 times [2022-11-16 12:15:17,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:17,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871868923] [2022-11-16 12:15:17,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:17,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:17,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:17,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:15:17,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:17,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:15:17,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:17,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:15:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:17,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:15:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:17,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-16 12:15:17,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:17,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-16 12:15:17,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:17,587 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 12:15:17,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:17,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871868923] [2022-11-16 12:15:17,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871868923] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:17,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:17,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:15:17,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279999504] [2022-11-16 12:15:17,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:17,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:15:17,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:17,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:15:17,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:15:17,591 INFO L87 Difference]: Start difference. First operand 124 states and 138 transitions. Second operand has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 12:15:17,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:17,676 INFO L93 Difference]: Finished difference Result 120 states and 134 transitions. [2022-11-16 12:15:17,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:15:17,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 54 [2022-11-16 12:15:17,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:17,678 INFO L225 Difference]: With dead ends: 120 [2022-11-16 12:15:17,679 INFO L226 Difference]: Without dead ends: 120 [2022-11-16 12:15:17,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:15:17,680 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 75 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:17,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 108 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:15:17,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-11-16 12:15:17,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-11-16 12:15:17,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.1702127659574468) internal successors, (110), 103 states have internal predecessors, (110), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-16 12:15:17,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 134 transitions. [2022-11-16 12:15:17,693 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 134 transitions. Word has length 54 [2022-11-16 12:15:17,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:17,694 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 134 transitions. [2022-11-16 12:15:17,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 12:15:17,694 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 134 transitions. [2022-11-16 12:15:17,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-16 12:15:17,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:17,695 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:17,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-16 12:15:17,696 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:15:17,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:17,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1565086582, now seen corresponding path program 1 times [2022-11-16 12:15:17,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:17,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373679520] [2022-11-16 12:15:17,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:17,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:17,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:17,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:15:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:17,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:15:17,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:17,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:15:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:17,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:15:17,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:17,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-16 12:15:17,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:17,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-16 12:15:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:17,822 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 12:15:17,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:17,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373679520] [2022-11-16 12:15:17,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373679520] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:17,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:17,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:15:17,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966016276] [2022-11-16 12:15:17,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:17,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:15:17,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:17,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:15:17,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:15:17,827 INFO L87 Difference]: Start difference. First operand 120 states and 134 transitions. Second operand has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 12:15:17,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:17,883 INFO L93 Difference]: Finished difference Result 116 states and 130 transitions. [2022-11-16 12:15:17,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:15:17,883 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 54 [2022-11-16 12:15:17,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:17,885 INFO L225 Difference]: With dead ends: 116 [2022-11-16 12:15:17,885 INFO L226 Difference]: Without dead ends: 116 [2022-11-16 12:15:17,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:15:17,886 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 26 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:17,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 79 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:15:17,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-16 12:15:17,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-11-16 12:15:17,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 94 states have (on average 1.127659574468085) internal successors, (106), 99 states have internal predecessors, (106), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-16 12:15:17,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 130 transitions. [2022-11-16 12:15:17,908 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 130 transitions. Word has length 54 [2022-11-16 12:15:17,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:17,908 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 130 transitions. [2022-11-16 12:15:17,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 12:15:17,910 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 130 transitions. [2022-11-16 12:15:17,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-16 12:15:17,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:17,912 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:17,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-16 12:15:17,913 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:15:17,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:17,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1231729240, now seen corresponding path program 1 times [2022-11-16 12:15:17,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:17,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315110804] [2022-11-16 12:15:17,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:17,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:18,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:15:18,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:18,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:15:18,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:18,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:15:18,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:18,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:15:18,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:18,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-16 12:15:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:18,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-16 12:15:18,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:18,220 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 12:15:18,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:18,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315110804] [2022-11-16 12:15:18,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315110804] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:18,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:18,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 12:15:18,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904193384] [2022-11-16 12:15:18,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:18,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:15:18,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:18,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:15:18,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:15:18,223 INFO L87 Difference]: Start difference. First operand 116 states and 130 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 12:15:18,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:18,450 INFO L93 Difference]: Finished difference Result 147 states and 165 transitions. [2022-11-16 12:15:18,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 12:15:18,451 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 60 [2022-11-16 12:15:18,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:18,452 INFO L225 Difference]: With dead ends: 147 [2022-11-16 12:15:18,452 INFO L226 Difference]: Without dead ends: 147 [2022-11-16 12:15:18,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:15:18,453 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 94 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:18,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 352 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:15:18,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-16 12:15:18,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 126. [2022-11-16 12:15:18,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 103 states have (on average 1.116504854368932) internal successors, (115), 107 states have internal predecessors, (115), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-16 12:15:18,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 141 transitions. [2022-11-16 12:15:18,458 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 141 transitions. Word has length 60 [2022-11-16 12:15:18,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:18,458 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 141 transitions. [2022-11-16 12:15:18,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 12:15:18,460 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 141 transitions. [2022-11-16 12:15:18,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-16 12:15:18,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:18,461 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 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, 1] [2022-11-16 12:15:18,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-16 12:15:18,462 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:15:18,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:18,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1979191294, now seen corresponding path program 4 times [2022-11-16 12:15:18,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:18,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823748678] [2022-11-16 12:15:18,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:18,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:18,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:22,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:15:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:22,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:15:22,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:22,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:15:22,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:22,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:15:22,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:22,146 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-16 12:15:22,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:22,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823748678] [2022-11-16 12:15:22,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823748678] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:15:22,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96696378] [2022-11-16 12:15:22,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:15:22,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:15:22,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:15:22,149 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:15:22,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:15:22,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:15:22,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:15:22,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 72 conjunts are in the unsatisfiable core [2022-11-16 12:15:22,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:15:22,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-16 12:15:22,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:15:22,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-16 12:15:23,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-11-16 12:15:23,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-11-16 12:15:25,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 41 [2022-11-16 12:15:26,826 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 28 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 12:15:26,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:15:30,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96696378] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:15:30,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:15:30,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 39 [2022-11-16 12:15:30,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510088453] [2022-11-16 12:15:30,579 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:15:30,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-16 12:15:30,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:30,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-16 12:15:30,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=2333, Unknown=1, NotChecked=0, Total=2652 [2022-11-16 12:15:30,582 INFO L87 Difference]: Start difference. First operand 126 states and 141 transitions. Second operand has 39 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 39 states have internal predecessors, (65), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-16 12:15:31,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:31,590 INFO L93 Difference]: Finished difference Result 141 states and 157 transitions. [2022-11-16 12:15:31,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 12:15:31,591 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 39 states have internal predecessors, (65), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 59 [2022-11-16 12:15:31,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:31,592 INFO L225 Difference]: With dead ends: 141 [2022-11-16 12:15:31,592 INFO L226 Difference]: Without dead ends: 141 [2022-11-16 12:15:31,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=352, Invalid=2617, Unknown=1, NotChecked=0, Total=2970 [2022-11-16 12:15:31,594 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 4 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:31,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1025 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 283 Invalid, 0 Unknown, 126 Unchecked, 0.5s Time] [2022-11-16 12:15:31,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-16 12:15:31,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-11-16 12:15:31,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 117 states have (on average 1.1196581196581197) internal successors, (131), 121 states have internal predecessors, (131), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-16 12:15:31,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 157 transitions. [2022-11-16 12:15:31,600 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 157 transitions. Word has length 59 [2022-11-16 12:15:31,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:31,600 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 157 transitions. [2022-11-16 12:15:31,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 39 states have internal predecessors, (65), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-16 12:15:31,601 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 157 transitions. [2022-11-16 12:15:31,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-16 12:15:31,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:31,602 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:31,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-16 12:15:31,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:15:31,809 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:15:31,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:31,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1385465723, now seen corresponding path program 1 times [2022-11-16 12:15:31,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:31,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185628266] [2022-11-16 12:15:31,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:31,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:32,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:15:32,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:32,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:15:32,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:32,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:15:32,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:32,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:15:32,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:32,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-16 12:15:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:32,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-16 12:15:32,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:32,215 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 12:15:32,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:32,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185628266] [2022-11-16 12:15:32,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185628266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:32,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:32,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-16 12:15:32,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319778742] [2022-11-16 12:15:32,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:32,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 12:15:32,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:32,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 12:15:32,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:15:32,219 INFO L87 Difference]: Start difference. First operand 141 states and 157 transitions. Second operand has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 12:15:32,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:32,645 INFO L93 Difference]: Finished difference Result 173 states and 194 transitions. [2022-11-16 12:15:32,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:15:32,646 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 62 [2022-11-16 12:15:32,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:32,647 INFO L225 Difference]: With dead ends: 173 [2022-11-16 12:15:32,648 INFO L226 Difference]: Without dead ends: 173 [2022-11-16 12:15:32,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:15:32,649 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 127 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:32,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 399 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:15:32,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-11-16 12:15:32,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 155. [2022-11-16 12:15:32,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 128 states have (on average 1.1171875) internal successors, (143), 133 states have internal predecessors, (143), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-16 12:15:32,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 173 transitions. [2022-11-16 12:15:32,655 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 173 transitions. Word has length 62 [2022-11-16 12:15:32,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:32,656 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 173 transitions. [2022-11-16 12:15:32,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 12:15:32,656 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 173 transitions. [2022-11-16 12:15:32,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-16 12:15:32,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:32,658 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:32,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-16 12:15:32,658 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:15:32,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:32,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1711953782, now seen corresponding path program 1 times [2022-11-16 12:15:32,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:32,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377092014] [2022-11-16 12:15:32,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:32,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:32,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:33,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:15:33,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:33,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:15:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:33,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:15:33,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:33,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:15:33,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:33,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-16 12:15:33,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:33,134 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-16 12:15:33,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:33,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377092014] [2022-11-16 12:15:33,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377092014] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:15:33,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387974422] [2022-11-16 12:15:33,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:33,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:15:33,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:15:33,137 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:15:33,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:15:33,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:33,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 12:15:33,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:15:33,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:15:33,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 12:15:33,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 12:15:33,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 12:15:33,811 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-16 12:15:33,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:15:33,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387974422] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:33,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:15:33,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 17 [2022-11-16 12:15:33,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923104837] [2022-11-16 12:15:33,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:33,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:15:33,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:33,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:15:33,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:15:33,814 INFO L87 Difference]: Start difference. First operand 155 states and 173 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 12:15:34,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:34,084 INFO L93 Difference]: Finished difference Result 195 states and 216 transitions. [2022-11-16 12:15:34,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 12:15:34,085 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 62 [2022-11-16 12:15:34,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:34,086 INFO L225 Difference]: With dead ends: 195 [2022-11-16 12:15:34,086 INFO L226 Difference]: Without dead ends: 195 [2022-11-16 12:15:34,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-11-16 12:15:34,088 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 88 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:34,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 499 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 114 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2022-11-16 12:15:34,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-11-16 12:15:34,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 158. [2022-11-16 12:15:34,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 131 states have (on average 1.1068702290076335) internal successors, (145), 135 states have internal predecessors, (145), 14 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-16 12:15:34,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 173 transitions. [2022-11-16 12:15:34,096 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 173 transitions. Word has length 62 [2022-11-16 12:15:34,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:34,096 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 173 transitions. [2022-11-16 12:15:34,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 12:15:34,097 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 173 transitions. [2022-11-16 12:15:34,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-16 12:15:34,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:34,098 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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, 1] [2022-11-16 12:15:34,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:15:34,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:15:34,305 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:15:34,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:34,306 INFO L85 PathProgramCache]: Analyzing trace with hash -2066552335, now seen corresponding path program 5 times [2022-11-16 12:15:34,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:34,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365761271] [2022-11-16 12:15:34,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:34,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:34,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:34,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:15:34,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:34,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:15:34,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:34,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:15:34,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:34,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:15:34,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:34,501 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 32 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-16 12:15:34,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:34,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365761271] [2022-11-16 12:15:34,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365761271] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:15:34,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100798034] [2022-11-16 12:15:34,503 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:15:34,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:15:34,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:15:34,505 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:15:34,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 12:15:34,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-16 12:15:34,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:15:34,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:15:34,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:15:34,673 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:15:34,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-16 12:15:34,954 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 22 proven. 30 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-16 12:15:34,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:15:35,207 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 26 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-16 12:15:35,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100798034] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:15:35,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:15:35,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 14] total 21 [2022-11-16 12:15:35,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710775014] [2022-11-16 12:15:35,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:15:35,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 12:15:35,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:35,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 12:15:35,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-11-16 12:15:35,210 INFO L87 Difference]: Start difference. First operand 158 states and 173 transitions. Second operand has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 states have internal predecessors, (71), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 12:15:36,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:36,657 INFO L93 Difference]: Finished difference Result 331 states and 373 transitions. [2022-11-16 12:15:36,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 12:15:36,658 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 states have internal predecessors, (71), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 64 [2022-11-16 12:15:36,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:36,660 INFO L225 Difference]: With dead ends: 331 [2022-11-16 12:15:36,661 INFO L226 Difference]: Without dead ends: 331 [2022-11-16 12:15:36,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 123 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=400, Invalid=1406, Unknown=0, NotChecked=0, Total=1806 [2022-11-16 12:15:36,662 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 833 mSDsluCounter, 1123 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 1331 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:36,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [833 Valid, 1331 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 12:15:36,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-11-16 12:15:36,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 171. [2022-11-16 12:15:36,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 144 states have (on average 1.1180555555555556) internal successors, (161), 148 states have internal predecessors, (161), 14 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-16 12:15:36,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 189 transitions. [2022-11-16 12:15:36,676 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 189 transitions. Word has length 64 [2022-11-16 12:15:36,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:36,676 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 189 transitions. [2022-11-16 12:15:36,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 states have internal predecessors, (71), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 12:15:36,677 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 189 transitions. [2022-11-16 12:15:36,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-16 12:15:36,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:36,678 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:36,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 12:15:36,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-16 12:15:36,885 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:15:36,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:36,885 INFO L85 PathProgramCache]: Analyzing trace with hash -244535950, now seen corresponding path program 1 times [2022-11-16 12:15:36,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:36,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152987733] [2022-11-16 12:15:36,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:36,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:36,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:37,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:15:37,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:37,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:15:37,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:37,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:15:37,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:37,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:15:37,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:37,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-16 12:15:37,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:37,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-16 12:15:37,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:37,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-16 12:15:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:37,660 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:15:37,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:37,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152987733] [2022-11-16 12:15:37,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152987733] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:15:37,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028924739] [2022-11-16 12:15:37,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:37,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:15:37,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:15:37,663 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:15:37,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 12:15:37,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:37,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-16 12:15:37,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:15:37,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:15:38,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 12:15:38,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-16 12:15:39,011 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 12:15:39,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-11-16 12:15:39,120 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:15:39,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:15:39,427 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:15:39,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 706 treesize of output 654 [2022-11-16 12:15:40,786 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 12:15:40,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028924739] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:15:40,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:15:40,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 13] total 34 [2022-11-16 12:15:40,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305939701] [2022-11-16 12:15:40,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:15:40,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 12:15:40,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:40,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 12:15:40,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:15:40,789 INFO L87 Difference]: Start difference. First operand 171 states and 189 transitions. Second operand has 34 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 33 states have internal predecessors, (89), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-16 12:15:43,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:43,889 INFO L93 Difference]: Finished difference Result 291 states and 324 transitions. [2022-11-16 12:15:43,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-16 12:15:43,889 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 33 states have internal predecessors, (89), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) Word has length 70 [2022-11-16 12:15:43,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:43,891 INFO L225 Difference]: With dead ends: 291 [2022-11-16 12:15:43,891 INFO L226 Difference]: Without dead ends: 291 [2022-11-16 12:15:43,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 130 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=502, Invalid=2920, Unknown=0, NotChecked=0, Total=3422 [2022-11-16 12:15:43,895 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 573 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:43,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 1087 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1079 Invalid, 0 Unknown, 171 Unchecked, 1.2s Time] [2022-11-16 12:15:43,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-11-16 12:15:43,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 226. [2022-11-16 12:15:43,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 188 states have (on average 1.0957446808510638) internal successors, (206), 194 states have internal predecessors, (206), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (22), 18 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-16 12:15:43,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 250 transitions. [2022-11-16 12:15:43,920 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 250 transitions. Word has length 70 [2022-11-16 12:15:43,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:43,920 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 250 transitions. [2022-11-16 12:15:43,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 33 states have internal predecessors, (89), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-16 12:15:43,921 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 250 transitions. [2022-11-16 12:15:43,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-16 12:15:43,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:43,922 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1, 1, 1, 1] [2022-11-16 12:15:43,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 12:15:44,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-16 12:15:44,130 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:15:44,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:44,131 INFO L85 PathProgramCache]: Analyzing trace with hash 947110112, now seen corresponding path program 1 times [2022-11-16 12:15:44,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:44,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409803900] [2022-11-16 12:15:44,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:44,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:44,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:44,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:15:44,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:44,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:15:44,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:44,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:15:44,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:44,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:15:44,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:44,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-16 12:15:44,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:44,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-16 12:15:44,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:44,460 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-16 12:15:44,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:44,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409803900] [2022-11-16 12:15:44,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409803900] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:15:44,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27955654] [2022-11-16 12:15:44,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:44,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:15:44,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:15:44,464 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:15:44,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 12:15:44,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:44,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:15:44,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:15:44,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 12:15:45,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 12:15:45,093 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-16 12:15:45,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:15:45,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-11-16 12:15:45,451 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-16 12:15:45,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27955654] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:15:45,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:15:45,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 18 [2022-11-16 12:15:45,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451204578] [2022-11-16 12:15:45,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:15:45,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 12:15:45,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:45,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 12:15:45,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:15:45,454 INFO L87 Difference]: Start difference. First operand 226 states and 250 transitions. Second operand has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-16 12:15:46,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:46,267 INFO L93 Difference]: Finished difference Result 268 states and 292 transitions. [2022-11-16 12:15:46,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 12:15:46,268 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 73 [2022-11-16 12:15:46,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:46,269 INFO L225 Difference]: With dead ends: 268 [2022-11-16 12:15:46,269 INFO L226 Difference]: Without dead ends: 268 [2022-11-16 12:15:46,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 146 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2022-11-16 12:15:46,271 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 283 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:46,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 946 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 543 Invalid, 0 Unknown, 63 Unchecked, 0.5s Time] [2022-11-16 12:15:46,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-11-16 12:15:46,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 225. [2022-11-16 12:15:46,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 187 states have (on average 1.085561497326203) internal successors, (203), 193 states have internal predecessors, (203), 21 states have call successors, (21), 14 states have call predecessors, (21), 13 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-16 12:15:46,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 245 transitions. [2022-11-16 12:15:46,280 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 245 transitions. Word has length 73 [2022-11-16 12:15:46,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:46,281 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 245 transitions. [2022-11-16 12:15:46,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-16 12:15:46,281 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 245 transitions. [2022-11-16 12:15:46,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-16 12:15:46,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:46,283 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:46,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 12:15:46,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:15:46,491 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:15:46,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:46,492 INFO L85 PathProgramCache]: Analyzing trace with hash -285594530, now seen corresponding path program 1 times [2022-11-16 12:15:46,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:46,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811846833] [2022-11-16 12:15:46,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:46,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:46,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:47,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:15:47,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:47,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:15:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:47,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:15:47,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:47,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:15:47,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:47,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-16 12:15:47,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:47,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-16 12:15:47,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:47,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-16 12:15:47,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:47,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-16 12:15:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:47,447 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-16 12:15:47,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:47,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811846833] [2022-11-16 12:15:47,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811846833] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:15:47,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734974230] [2022-11-16 12:15:47,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:47,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:15:47,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:15:47,451 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:15:47,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 12:15:47,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:47,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 12:15:47,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:15:47,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:15:47,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:15:47,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:15:47,809 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 12:15:47,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 25 [2022-11-16 12:15:49,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-11-16 12:15:49,119 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 12:15:49,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:15:49,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 27 [2022-11-16 12:15:56,128 WARN L233 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 12:15:56,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734974230] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:15:56,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:15:56,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2022-11-16 12:15:56,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524731328] [2022-11-16 12:15:56,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:15:56,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 12:15:56,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:56,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 12:15:56,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1436, Unknown=0, NotChecked=0, Total=1640 [2022-11-16 12:15:56,263 INFO L87 Difference]: Start difference. First operand 225 states and 245 transitions. Second operand has 31 states, 28 states have (on average 2.892857142857143) internal successors, (81), 30 states have internal predecessors, (81), 8 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-16 12:15:58,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:58,373 INFO L93 Difference]: Finished difference Result 253 states and 275 transitions. [2022-11-16 12:15:58,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-16 12:15:58,374 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.892857142857143) internal successors, (81), 30 states have internal predecessors, (81), 8 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) Word has length 74 [2022-11-16 12:15:58,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:58,375 INFO L225 Difference]: With dead ends: 253 [2022-11-16 12:15:58,375 INFO L226 Difference]: Without dead ends: 253 [2022-11-16 12:15:58,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 115 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=581, Invalid=3201, Unknown=0, NotChecked=0, Total=3782 [2022-11-16 12:15:58,377 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 343 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:58,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 522 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 648 Invalid, 0 Unknown, 165 Unchecked, 0.7s Time] [2022-11-16 12:15:58,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-11-16 12:15:58,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 228. [2022-11-16 12:15:58,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 190 states have (on average 1.0842105263157895) internal successors, (206), 195 states have internal predecessors, (206), 21 states have call successors, (21), 15 states have call predecessors, (21), 14 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-16 12:15:58,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 248 transitions. [2022-11-16 12:15:58,385 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 248 transitions. Word has length 74 [2022-11-16 12:15:58,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:58,395 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 248 transitions. [2022-11-16 12:15:58,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.892857142857143) internal successors, (81), 30 states have internal predecessors, (81), 8 states have call successors, (15), 3 states have call predecessors, (15), 4 states have return successors, (15), 7 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-16 12:15:58,396 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 248 transitions. [2022-11-16 12:15:58,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-16 12:15:58,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:58,397 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:58,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-16 12:15:58,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:15:58,598 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:15:58,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:58,599 INFO L85 PathProgramCache]: Analyzing trace with hash 421565281, now seen corresponding path program 1 times [2022-11-16 12:15:58,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:58,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82178981] [2022-11-16 12:15:58,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:58,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:59,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:15:59,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:59,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:15:59,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:59,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:15:59,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:59,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:15:59,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:59,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-16 12:15:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:59,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-16 12:15:59,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:59,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-16 12:15:59,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:59,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-16 12:15:59,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:15:59,224 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-16 12:15:59,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:15:59,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82178981] [2022-11-16 12:15:59,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82178981] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:15:59,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:15:59,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-16 12:15:59,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289769508] [2022-11-16 12:15:59,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:15:59,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:15:59,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:15:59,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:15:59,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:15:59,228 INFO L87 Difference]: Start difference. First operand 228 states and 248 transitions. Second operand has 11 states, 10 states have (on average 4.2) internal successors, (42), 11 states have internal predecessors, (42), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-16 12:15:59,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:15:59,875 INFO L93 Difference]: Finished difference Result 250 states and 273 transitions. [2022-11-16 12:15:59,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:15:59,876 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 11 states have internal predecessors, (42), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 76 [2022-11-16 12:15:59,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:15:59,878 INFO L225 Difference]: With dead ends: 250 [2022-11-16 12:15:59,878 INFO L226 Difference]: Without dead ends: 250 [2022-11-16 12:15:59,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2022-11-16 12:15:59,879 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 198 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 12:15:59,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 265 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 12:15:59,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-11-16 12:15:59,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 244. [2022-11-16 12:15:59,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 204 states have (on average 1.0784313725490196) internal successors, (220), 208 states have internal predecessors, (220), 23 states have call successors, (23), 15 states have call predecessors, (23), 14 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-16 12:15:59,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 266 transitions. [2022-11-16 12:15:59,889 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 266 transitions. Word has length 76 [2022-11-16 12:15:59,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:15:59,890 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 266 transitions. [2022-11-16 12:15:59,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 11 states have internal predecessors, (42), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-16 12:15:59,890 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 266 transitions. [2022-11-16 12:15:59,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-16 12:15:59,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:15:59,892 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:15:59,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-16 12:15:59,892 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:15:59,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:15:59,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1507430298, now seen corresponding path program 1 times [2022-11-16 12:15:59,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:15:59,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066796703] [2022-11-16 12:15:59,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:15:59,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:15:59,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:01,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:16:01,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:01,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:16:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:01,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:16:01,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:01,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:16:01,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:01,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-16 12:16:01,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:01,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-16 12:16:01,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:01,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-16 12:16:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:01,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-16 12:16:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:01,882 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-16 12:16:01,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:16:01,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066796703] [2022-11-16 12:16:01,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066796703] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:16:01,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001315144] [2022-11-16 12:16:01,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:16:01,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:16:01,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:16:01,885 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:16:01,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 12:16:02,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:16:02,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-16 12:16:02,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:16:02,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:16:02,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:16:03,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:16:03,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:16:03,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2022-11-16 12:16:03,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:16:03,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:16:03,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:16:03,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 37 [2022-11-16 12:16:05,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:16:05,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:16:05,954 INFO L321 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-11-16 12:16:05,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 36 [2022-11-16 12:16:06,077 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-16 12:16:06,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:16:07,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:16:07,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-16 12:16:07,948 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-11-16 12:16:07,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 6160 treesize of output 5772 [2022-11-16 12:16:08,431 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:16:08,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7312 treesize of output 6358 [2022-11-16 12:16:09,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 2652 treesize of output 2460 [2022-11-16 12:24:32,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 5239 treesize of output 4843 [2022-11-16 12:24:41,796 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:24:41,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 338 treesize of output 284 [2022-11-16 12:24:42,498 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-16 12:24:42,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001315144] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:24:42,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:24:42,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 22] total 60 [2022-11-16 12:24:42,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205524990] [2022-11-16 12:24:42,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:24:42,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-16 12:24:42,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:24:42,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-16 12:24:42,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=3285, Unknown=0, NotChecked=0, Total=3540 [2022-11-16 12:24:42,503 INFO L87 Difference]: Start difference. First operand 244 states and 266 transitions. Second operand has 60 states, 56 states have (on average 2.2142857142857144) internal successors, (124), 59 states have internal predecessors, (124), 10 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 7 states have call predecessors, (19), 9 states have call successors, (19) [2022-11-16 12:24:53,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:24:53,400 INFO L93 Difference]: Finished difference Result 340 states and 375 transitions. [2022-11-16 12:24:53,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-16 12:24:53,401 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 56 states have (on average 2.2142857142857144) internal successors, (124), 59 states have internal predecessors, (124), 10 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 7 states have call predecessors, (19), 9 states have call successors, (19) Word has length 80 [2022-11-16 12:24:53,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:24:53,403 INFO L225 Difference]: With dead ends: 340 [2022-11-16 12:24:53,403 INFO L226 Difference]: Without dead ends: 340 [2022-11-16 12:24:53,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 133 SyntacticMatches, 9 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3171 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=1636, Invalid=10354, Unknown=0, NotChecked=0, Total=11990 [2022-11-16 12:24:53,408 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 1641 mSDsluCounter, 1109 mSDsCounter, 0 mSdLazyCounter, 2039 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1642 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 2795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 2039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 453 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-16 12:24:53,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1642 Valid, 1160 Invalid, 2795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 2039 Invalid, 0 Unknown, 453 Unchecked, 3.5s Time] [2022-11-16 12:24:53,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-11-16 12:24:53,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 288. [2022-11-16 12:24:53,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 241 states have (on average 1.0746887966804979) internal successors, (259), 245 states have internal predecessors, (259), 29 states have call successors, (29), 17 states have call predecessors, (29), 15 states have return successors, (29), 25 states have call predecessors, (29), 29 states have call successors, (29) [2022-11-16 12:24:53,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 317 transitions. [2022-11-16 12:24:53,419 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 317 transitions. Word has length 80 [2022-11-16 12:24:53,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:24:53,419 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 317 transitions. [2022-11-16 12:24:53,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 56 states have (on average 2.2142857142857144) internal successors, (124), 59 states have internal predecessors, (124), 10 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (19), 7 states have call predecessors, (19), 9 states have call successors, (19) [2022-11-16 12:24:53,420 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 317 transitions. [2022-11-16 12:24:53,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-16 12:24:53,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:24:53,421 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:24:53,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 12:24:53,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:24:53,629 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:24:53,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:24:53,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1779636283, now seen corresponding path program 6 times [2022-11-16 12:24:53,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:24:53,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036185177] [2022-11-16 12:24:53,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:24:53,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:24:53,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:01,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:25:01,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:01,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:25:01,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:01,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:25:01,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:01,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:25:01,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:25:01,155 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 24 proven. 93 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 12:25:01,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:25:01,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036185177] [2022-11-16 12:25:01,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036185177] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:25:01,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107467784] [2022-11-16 12:25:01,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:25:01,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:25:01,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:25:01,160 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:25:01,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 12:25:01,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-16 12:25:01,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:25:01,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-16 12:25:01,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:25:01,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-16 12:25:02,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-16 12:25:02,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-11-16 12:25:07,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2022-11-16 12:25:16,059 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 16 proven. 107 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 12:25:16,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:25:26,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107467784] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:25:26,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:25:26,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 31] total 57 [2022-11-16 12:25:26,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644931887] [2022-11-16 12:25:26,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:25:26,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-16 12:25:26,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:25:26,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-16 12:25:26,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=5985, Unknown=4, NotChecked=0, Total=6642 [2022-11-16 12:25:26,917 INFO L87 Difference]: Start difference. First operand 288 states and 317 transitions. Second operand has 57 states, 57 states have (on average 1.8245614035087718) internal successors, (104), 57 states have internal predecessors, (104), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-16 12:28:00,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:28:00,375 INFO L93 Difference]: Finished difference Result 392 states and 446 transitions. [2022-11-16 12:28:00,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-11-16 12:28:00,376 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.8245614035087718) internal successors, (104), 57 states have internal predecessors, (104), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 77 [2022-11-16 12:28:00,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:28:00,378 INFO L225 Difference]: With dead ends: 392 [2022-11-16 12:28:00,378 INFO L226 Difference]: Without dead ends: 387 [2022-11-16 12:28:00,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 83 SyntacticMatches, 13 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7307 ImplicationChecksByTransitivity, 178.8s TimeCoverageRelationStatistics Valid=2940, Invalid=19100, Unknown=12, NotChecked=0, Total=22052 [2022-11-16 12:28:00,384 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 5 mSDsluCounter, 1149 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 12:28:00,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 1212 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 284 Invalid, 0 Unknown, 114 Unchecked, 0.7s Time] [2022-11-16 12:28:00,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-11-16 12:28:00,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 335. [2022-11-16 12:28:00,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 288 states have (on average 1.1076388888888888) internal successors, (319), 292 states have internal predecessors, (319), 29 states have call successors, (29), 17 states have call predecessors, (29), 15 states have return successors, (29), 25 states have call predecessors, (29), 29 states have call successors, (29) [2022-11-16 12:28:00,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 377 transitions. [2022-11-16 12:28:00,395 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 377 transitions. Word has length 77 [2022-11-16 12:28:00,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:28:00,396 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 377 transitions. [2022-11-16 12:28:00,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.8245614035087718) internal successors, (104), 57 states have internal predecessors, (104), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-16 12:28:00,396 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 377 transitions. [2022-11-16 12:28:00,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-16 12:28:00,398 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:28:00,398 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:28:00,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 12:28:00,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-16 12:28:00,611 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:28:00,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:28:00,612 INFO L85 PathProgramCache]: Analyzing trace with hash -2019077795, now seen corresponding path program 1 times [2022-11-16 12:28:00,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:28:00,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589579840] [2022-11-16 12:28:00,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:28:00,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:28:00,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:01,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:28:01,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:01,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:28:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:01,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:28:01,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:01,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:28:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:01,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-16 12:28:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:01,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-11-16 12:28:01,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:01,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-11-16 12:28:01,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:01,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-16 12:28:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:01,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-16 12:28:01,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:01,599 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-16 12:28:01,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:28:01,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589579840] [2022-11-16 12:28:01,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589579840] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:28:01,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557621388] [2022-11-16 12:28:01,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:28:01,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:28:01,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:28:01,603 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:28:01,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 12:28:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:01,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-16 12:28:01,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:28:01,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-16 12:28:01,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-16 12:28:02,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-16 12:28:02,371 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-11-16 12:28:02,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 40 treesize of output 37 [2022-11-16 12:28:02,616 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-11-16 12:28:02,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 40 treesize of output 37 [2022-11-16 12:28:02,873 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-11-16 12:28:02,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 40 treesize of output 37 [2022-11-16 12:28:03,093 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-11-16 12:28:03,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 40 treesize of output 37 [2022-11-16 12:28:03,333 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-11-16 12:28:03,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 40 treesize of output 37 [2022-11-16 12:28:03,535 WARN L855 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_main_~a~0#1.base| Int)) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~a~0#1.base|) 0) (exists ((|v_ULTIMATE.start_main_~#j~2#1.base_26| Int) (v_ArrVal_772 Int) (|v_ULTIMATE.start_main_~#i~2#1.base_26| Int)) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~a~0#1.base| 1))) (let ((.cse1 (store .cse0 |v_ULTIMATE.start_main_~#i~2#1.base_26| 1))) (and (= (select .cse0 |v_ULTIMATE.start_main_~#i~2#1.base_26|) 0) (= |c_#valid| (store (store (store (store .cse1 |v_ULTIMATE.start_main_~#j~2#1.base_26| v_ArrVal_772) |ULTIMATE.start_main_~a~0#1.base| 0) |v_ULTIMATE.start_main_~#i~2#1.base_26| 0) |v_ULTIMATE.start_main_~#j~2#1.base_26| 0)) (= (select .cse1 |v_ULTIMATE.start_main_~#j~2#1.base_26|) 0))))))) is different from true [2022-11-16 12:28:03,536 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-16 12:28:03,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:28:03,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557621388] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:28:03,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 12:28:03,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 18 [2022-11-16 12:28:03,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353406232] [2022-11-16 12:28:03,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:28:03,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 12:28:03,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:28:03,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 12:28:03,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=255, Unknown=1, NotChecked=32, Total=342 [2022-11-16 12:28:03,543 INFO L87 Difference]: Start difference. First operand 335 states and 377 transitions. Second operand has 9 states, 8 states have (on average 6.25) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 12:28:03,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:28:03,637 INFO L93 Difference]: Finished difference Result 334 states and 376 transitions. [2022-11-16 12:28:03,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 12:28:03,643 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 86 [2022-11-16 12:28:03,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:28:03,645 INFO L225 Difference]: With dead ends: 334 [2022-11-16 12:28:03,645 INFO L226 Difference]: Without dead ends: 257 [2022-11-16 12:28:03,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 88 SyntacticMatches, 14 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=59, Invalid=286, Unknown=1, NotChecked=34, Total=380 [2022-11-16 12:28:03,649 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 32 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:28:03,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 173 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 131 Unchecked, 0.1s Time] [2022-11-16 12:28:03,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-11-16 12:28:03,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2022-11-16 12:28:03,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 225 states have (on average 1.1022222222222222) internal successors, (248), 228 states have internal predecessors, (248), 20 states have call successors, (20), 11 states have call predecessors, (20), 10 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-16 12:28:03,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 287 transitions. [2022-11-16 12:28:03,669 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 287 transitions. Word has length 86 [2022-11-16 12:28:03,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:28:03,670 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 287 transitions. [2022-11-16 12:28:03,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.25) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 12:28:03,670 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 287 transitions. [2022-11-16 12:28:03,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-16 12:28:03,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:28:03,672 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:28:03,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 12:28:03,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-16 12:28:03,879 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:28:03,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:28:03,880 INFO L85 PathProgramCache]: Analyzing trace with hash 316774041, now seen corresponding path program 1 times [2022-11-16 12:28:03,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:28:03,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768621987] [2022-11-16 12:28:03,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:28:03,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:28:03,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:04,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:28:04,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:04,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:28:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:04,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:28:04,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:04,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:28:04,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:04,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-11-16 12:28:04,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:04,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-16 12:28:04,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:04,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-16 12:28:04,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:04,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-16 12:28:04,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:04,800 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-16 12:28:04,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:28:04,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768621987] [2022-11-16 12:28:04,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768621987] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:28:04,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288279444] [2022-11-16 12:28:04,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:28:04,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:28:04,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:28:04,803 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:28:04,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 12:28:05,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:05,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-16 12:28:05,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:28:05,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 12:28:06,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-16 12:28:06,530 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-16 12:28:06,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:28:06,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2022-11-16 12:28:06,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:28:06,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 12:28:06,991 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:28:06,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 41 [2022-11-16 12:28:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-16 12:28:07,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288279444] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:28:07,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:28:07,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 11] total 34 [2022-11-16 12:28:07,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285821467] [2022-11-16 12:28:07,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:28:07,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 12:28:07,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:28:07,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 12:28:07,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1039, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 12:28:07,372 INFO L87 Difference]: Start difference. First operand 257 states and 287 transitions. Second operand has 35 states, 34 states have (on average 4.470588235294118) internal successors, (152), 35 states have internal predecessors, (152), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2022-11-16 12:28:10,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:28:10,081 INFO L93 Difference]: Finished difference Result 278 states and 306 transitions. [2022-11-16 12:28:10,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 12:28:10,081 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 4.470588235294118) internal successors, (152), 35 states have internal predecessors, (152), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 89 [2022-11-16 12:28:10,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:28:10,083 INFO L225 Difference]: With dead ends: 278 [2022-11-16 12:28:10,083 INFO L226 Difference]: Without dead ends: 245 [2022-11-16 12:28:10,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 168 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=534, Invalid=2328, Unknown=0, NotChecked=0, Total=2862 [2022-11-16 12:28:10,084 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 416 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 948 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:28:10,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 948 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1143 Invalid, 0 Unknown, 59 Unchecked, 1.2s Time] [2022-11-16 12:28:10,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-11-16 12:28:10,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 239. [2022-11-16 12:28:10,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 209 states have (on average 1.0909090909090908) internal successors, (228), 210 states have internal predecessors, (228), 17 states have call successors, (17), 13 states have call predecessors, (17), 11 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-16 12:28:10,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 261 transitions. [2022-11-16 12:28:10,092 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 261 transitions. Word has length 89 [2022-11-16 12:28:10,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:28:10,092 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 261 transitions. [2022-11-16 12:28:10,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 4.470588235294118) internal successors, (152), 35 states have internal predecessors, (152), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2022-11-16 12:28:10,093 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 261 transitions. [2022-11-16 12:28:10,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-16 12:28:10,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:28:10,094 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:28:10,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 12:28:10,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-16 12:28:10,302 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:28:10,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:28:10,302 INFO L85 PathProgramCache]: Analyzing trace with hash 396562012, now seen corresponding path program 1 times [2022-11-16 12:28:10,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:28:10,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077506466] [2022-11-16 12:28:10,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:28:10,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:28:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:11,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:28:11,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:11,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:28:11,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:11,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:28:11,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:11,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:28:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:11,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-11-16 12:28:11,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:11,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-11-16 12:28:11,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:11,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-16 12:28:11,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:11,129 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 38 proven. 7 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-16 12:28:11,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:28:11,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077506466] [2022-11-16 12:28:11,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077506466] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:28:11,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282762852] [2022-11-16 12:28:11,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:28:11,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:28:11,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:28:11,132 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:28:11,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 12:28:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:11,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-16 12:28:11,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:28:11,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 12:28:12,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 12:28:12,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-16 12:28:13,212 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 12:28:13,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-11-16 12:28:13,310 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-16 12:28:13,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:28:13,622 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:28:13,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 706 treesize of output 654 [2022-11-16 12:28:16,232 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 34 proven. 11 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-16 12:28:16,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282762852] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:28:16,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:28:16,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 14] total 37 [2022-11-16 12:28:16,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847566529] [2022-11-16 12:28:16,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:28:16,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-16 12:28:16,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:28:16,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-16 12:28:16,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 12:28:16,235 INFO L87 Difference]: Start difference. First operand 239 states and 261 transitions. Second operand has 37 states, 32 states have (on average 3.96875) internal successors, (127), 36 states have internal predecessors, (127), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-16 12:28:19,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:28:19,439 INFO L93 Difference]: Finished difference Result 343 states and 377 transitions. [2022-11-16 12:28:19,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-16 12:28:19,441 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 32 states have (on average 3.96875) internal successors, (127), 36 states have internal predecessors, (127), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) Word has length 93 [2022-11-16 12:28:19,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:28:19,443 INFO L225 Difference]: With dead ends: 343 [2022-11-16 12:28:19,443 INFO L226 Difference]: Without dead ends: 343 [2022-11-16 12:28:19,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 173 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=683, Invalid=3739, Unknown=0, NotChecked=0, Total=4422 [2022-11-16 12:28:19,445 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 483 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:28:19,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 1059 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1232 Invalid, 0 Unknown, 223 Unchecked, 1.2s Time] [2022-11-16 12:28:19,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-11-16 12:28:19,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 215. [2022-11-16 12:28:19,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 189 states have (on average 1.0952380952380953) internal successors, (207), 190 states have internal predecessors, (207), 13 states have call successors, (13), 12 states have call predecessors, (13), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-16 12:28:19,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 232 transitions. [2022-11-16 12:28:19,454 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 232 transitions. Word has length 93 [2022-11-16 12:28:19,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:28:19,454 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 232 transitions. [2022-11-16 12:28:19,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 32 states have (on average 3.96875) internal successors, (127), 36 states have internal predecessors, (127), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-16 12:28:19,455 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 232 transitions. [2022-11-16 12:28:19,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-16 12:28:19,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:28:19,456 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:28:19,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-16 12:28:19,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-16 12:28:19,664 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:28:19,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:28:19,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1883994722, now seen corresponding path program 7 times [2022-11-16 12:28:19,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:28:19,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618225647] [2022-11-16 12:28:19,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:28:19,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:28:19,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:19,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:28:19,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:19,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-16 12:28:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:19,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 12:28:19,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:19,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-16 12:28:19,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 151 proven. 70 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-16 12:28:19,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:28:19,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618225647] [2022-11-16 12:28:19,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618225647] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:28:19,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928456684] [2022-11-16 12:28:19,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:28:19,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:28:19,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:28:19,886 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:28:19,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 12:28:20,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:28:20,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 12:28:20,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:28:20,148 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 151 proven. 70 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-16 12:28:20,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:28:20,307 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 151 proven. 70 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-16 12:28:20,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928456684] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:28:20,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:28:20,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2022-11-16 12:28:20,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272043073] [2022-11-16 12:28:20,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:28:20,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 12:28:20,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:28:20,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 12:28:20,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:28:20,309 INFO L87 Difference]: Start difference. First operand 215 states and 232 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 12:28:20,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:28:20,748 INFO L93 Difference]: Finished difference Result 403 states and 451 transitions. [2022-11-16 12:28:20,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:28:20,749 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 95 [2022-11-16 12:28:20,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:28:20,751 INFO L225 Difference]: With dead ends: 403 [2022-11-16 12:28:20,751 INFO L226 Difference]: Without dead ends: 403 [2022-11-16 12:28:20,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 189 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2022-11-16 12:28:20,753 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 358 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:28:20,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 1020 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:28:20,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-11-16 12:28:20,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 233. [2022-11-16 12:28:20,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 207 states have (on average 1.1207729468599035) internal successors, (232), 208 states have internal predecessors, (232), 13 states have call successors, (13), 12 states have call predecessors, (13), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-16 12:28:20,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 257 transitions. [2022-11-16 12:28:20,763 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 257 transitions. Word has length 95 [2022-11-16 12:28:20,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:28:20,764 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 257 transitions. [2022-11-16 12:28:20,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-16 12:28:20,764 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 257 transitions. [2022-11-16 12:28:20,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-16 12:28:20,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:28:20,766 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:28:20,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-16 12:28:20,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c64b2b42-0775-4454-87f0-409542737339/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:28:20,974 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-16 12:28:20,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:28:20,974 INFO L85 PathProgramCache]: Analyzing trace with hash -588237616, now seen corresponding path program 1 times [2022-11-16 12:28:20,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:28:20,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123922458] [2022-11-16 12:28:20,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:28:20,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:28:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat