./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_9fb78fd6-5011-4ebd-95b6-1570ed406117/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fb78fd6-5011-4ebd-95b6-1570ed406117/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fb78fd6-5011-4ebd-95b6-1570ed406117/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fb78fd6-5011-4ebd-95b6-1570ed406117/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fb78fd6-5011-4ebd-95b6-1570ed406117/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fb78fd6-5011-4ebd-95b6-1570ed406117/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f8d14145608efc0a8f321a178564faff63399ecbab28641c0c2971fec318068f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:03:10,062 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:03:10,213 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fb78fd6-5011-4ebd-95b6-1570ed406117/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:03:10,224 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:03:10,225 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:03:10,271 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:03:10,272 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:03:10,273 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:03:10,274 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:03:10,280 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:03:10,282 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:03:10,283 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:03:10,284 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:03:10,286 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:03:10,287 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:03:10,287 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:03:10,288 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:03:10,289 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:03:10,289 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:03:10,290 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:03:10,290 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:03:10,291 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:03:10,292 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:03:10,294 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:03:10,295 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:03:10,296 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:03:10,297 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:03:10,297 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:03:10,298 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:03:10,299 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:03:10,300 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:03:10,301 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:03:10,301 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:03:10,302 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:03:10,302 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:03:10,303 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:03:10,303 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:03:10,304 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:03:10,304 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:03:10,304 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fb78fd6-5011-4ebd-95b6-1570ed406117/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fb78fd6-5011-4ebd-95b6-1570ed406117/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8d14145608efc0a8f321a178564faff63399ecbab28641c0c2971fec318068f [2023-11-12 02:03:10,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:03:10,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:03:10,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:03:10,723 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:03:10,723 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:03:10,725 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fb78fd6-5011-4ebd-95b6-1570ed406117/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2023-11-12 02:03:14,151 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:03:14,541 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:03:14,542 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fb78fd6-5011-4ebd-95b6-1570ed406117/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2023-11-12 02:03:14,572 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fb78fd6-5011-4ebd-95b6-1570ed406117/bin/uautomizer-verify-uTZkv6EMXl/data/61867b95e/1a83760c1451432380144ce0e95471cd/FLAG9229d64ce [2023-11-12 02:03:14,597 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fb78fd6-5011-4ebd-95b6-1570ed406117/bin/uautomizer-verify-uTZkv6EMXl/data/61867b95e/1a83760c1451432380144ce0e95471cd [2023-11-12 02:03:14,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:03:14,608 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:03:14,612 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:03:14,612 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:03:14,622 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:03:14,623 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:03:14" (1/1) ... [2023-11-12 02:03:14,625 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bda2c62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:14, skipping insertion in model container [2023-11-12 02:03:14,625 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:03:14" (1/1) ... [2023-11-12 02:03:14,680 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:03:15,147 WARN L240 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_9fb78fd6-5011-4ebd-95b6-1570ed406117/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2023-11-12 02:03:15,213 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:03:15,229 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:03:15,285 WARN L240 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_9fb78fd6-5011-4ebd-95b6-1570ed406117/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2023-11-12 02:03:15,303 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:03:15,342 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:03:15,343 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:15 WrapperNode [2023-11-12 02:03:15,343 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:03:15,344 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:03:15,345 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:03:15,345 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:03:15,353 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:15" (1/1) ... [2023-11-12 02:03:15,370 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:15" (1/1) ... [2023-11-12 02:03:15,403 INFO L138 Inliner]: procedures = 129, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 206 [2023-11-12 02:03:15,405 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:03:15,406 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:03:15,406 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:03:15,407 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:03:15,418 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:15" (1/1) ... [2023-11-12 02:03:15,418 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:15" (1/1) ... [2023-11-12 02:03:15,427 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:15" (1/1) ... [2023-11-12 02:03:15,428 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:15" (1/1) ... [2023-11-12 02:03:15,443 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:15" (1/1) ... [2023-11-12 02:03:15,452 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:15" (1/1) ... [2023-11-12 02:03:15,461 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:15" (1/1) ... [2023-11-12 02:03:15,472 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:15" (1/1) ... [2023-11-12 02:03:15,479 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:03:15,480 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:03:15,480 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:03:15,480 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:03:15,482 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:15" (1/1) ... [2023-11-12 02:03:15,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:03:15,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fb78fd6-5011-4ebd-95b6-1570ed406117/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:03:15,517 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fb78fd6-5011-4ebd-95b6-1570ed406117/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:03:15,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fb78fd6-5011-4ebd-95b6-1570ed406117/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:03:15,561 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2023-11-12 02:03:15,561 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2023-11-12 02:03:15,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:03:15,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:03:15,562 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:03:15,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 02:03:15,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 02:03:15,562 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2023-11-12 02:03:15,562 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2023-11-12 02:03:15,563 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:03:15,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 02:03:15,563 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2023-11-12 02:03:15,563 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2023-11-12 02:03:15,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:03:15,564 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2023-11-12 02:03:15,564 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2023-11-12 02:03:15,564 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:03:15,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:03:15,754 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:03:15,764 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:03:16,460 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:03:16,469 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:03:16,473 INFO L302 CfgBuilder]: Removed 33 assume(true) statements. [2023-11-12 02:03:16,477 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:03:16 BoogieIcfgContainer [2023-11-12 02:03:16,477 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:03:16,481 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:03:16,481 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:03:16,485 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:03:16,486 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:03:14" (1/3) ... [2023-11-12 02:03:16,486 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ca57450 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:03:16, skipping insertion in model container [2023-11-12 02:03:16,487 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:03:15" (2/3) ... [2023-11-12 02:03:16,487 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ca57450 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:03:16, skipping insertion in model container [2023-11-12 02:03:16,487 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:03:16" (3/3) ... [2023-11-12 02:03:16,489 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2023-11-12 02:03:16,508 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:03:16,509 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:03:16,578 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:03:16,589 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@4a8db7f3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:03:16,590 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:03:16,596 INFO L276 IsEmpty]: Start isEmpty. Operand has 97 states, 76 states have (on average 1.6710526315789473) internal successors, (127), 84 states have internal predecessors, (127), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-12 02:03:16,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-12 02:03:16,606 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:03:16,607 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:03:16,608 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:03:16,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:03:16,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1662217851, now seen corresponding path program 1 times [2023-11-12 02:03:16,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:03:16,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874022416] [2023-11-12 02:03:16,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:16,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:03:16,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:16,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:03:16,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:03:16,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874022416] [2023-11-12 02:03:16,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874022416] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:03:16,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:03:16,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:03:16,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576071044] [2023-11-12 02:03:16,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:03:16,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:03:16,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:03:17,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:03:17,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:03:17,008 INFO L87 Difference]: Start difference. First operand has 97 states, 76 states have (on average 1.6710526315789473) internal successors, (127), 84 states have internal predecessors, (127), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:17,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:03:17,065 INFO L93 Difference]: Finished difference Result 189 states and 327 transitions. [2023-11-12 02:03:17,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:03:17,069 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-12 02:03:17,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:03:17,080 INFO L225 Difference]: With dead ends: 189 [2023-11-12 02:03:17,081 INFO L226 Difference]: Without dead ends: 88 [2023-11-12 02:03:17,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:03:17,091 INFO L413 NwaCegarLoop]: 115 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, 115 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 [2023-11-12 02:03:17,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:03:17,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-12 02:03:17,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-11-12 02:03:17,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.2388059701492538) internal successors, (83), 76 states have internal predecessors, (83), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-12 02:03:17,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2023-11-12 02:03:17,162 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 16 [2023-11-12 02:03:17,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:03:17,163 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2023-11-12 02:03:17,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:03:17,164 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2023-11-12 02:03:17,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-12 02:03:17,167 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:03:17,167 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:03:17,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:03:17,168 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:03:17,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:03:17,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1763096942, now seen corresponding path program 1 times [2023-11-12 02:03:17,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:03:17,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059085652] [2023-11-12 02:03:17,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:17,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:03:17,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:19,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:03:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:19,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-12 02:03:19,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:20,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:03:20,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:03:20,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059085652] [2023-11-12 02:03:20,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059085652] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:03:20,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196167691] [2023-11-12 02:03:20,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:20,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:20,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fb78fd6-5011-4ebd-95b6-1570ed406117/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:03:20,407 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fb78fd6-5011-4ebd-95b6-1570ed406117/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:03:20,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fb78fd6-5011-4ebd-95b6-1570ed406117/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:03:20,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:20,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-12 02:03:20,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:03:20,780 INFO L351 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 14 treesize of output 12 [2023-11-12 02:03:20,978 INFO L322 Elim1Store]: treesize reduction 50, result has 41.2 percent of original size [2023-11-12 02:03:20,978 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 104 [2023-11-12 02:03:20,991 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-11-12 02:03:21,028 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-11-12 02:03:21,098 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 20 [2023-11-12 02:03:21,355 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 12 [2023-11-12 02:03:21,545 INFO L351 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 24 treesize of output 19 [2023-11-12 02:03:21,633 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2023-11-12 02:03:22,115 INFO L322 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2023-11-12 02:03:22,117 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 72 [2023-11-12 02:03:22,141 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-11-12 02:03:22,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:03:22,275 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-12 02:03:22,276 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2023-11-12 02:03:22,364 INFO L351 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 16 treesize of output 8 [2023-11-12 02:03:22,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:03:22,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:03:22,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196167691] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:03:22,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:03:22,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2023-11-12 02:03:22,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580709627] [2023-11-12 02:03:22,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:03:22,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-12 02:03:22,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:03:22,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-12 02:03:22,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=615, Unknown=3, NotChecked=0, Total=702 [2023-11-12 02:03:22,707 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand has 26 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 23 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-12 02:03:25,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:03:25,474 INFO L93 Difference]: Finished difference Result 132 states and 163 transitions. [2023-11-12 02:03:25,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 02:03:25,475 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 23 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 33 [2023-11-12 02:03:25,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:03:25,480 INFO L225 Difference]: With dead ends: 132 [2023-11-12 02:03:25,480 INFO L226 Difference]: Without dead ends: 129 [2023-11-12 02:03:25,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=161, Invalid=1096, Unknown=3, NotChecked=0, Total=1260 [2023-11-12 02:03:25,483 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 202 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 62 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:03:25,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 639 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1165 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2023-11-12 02:03:25,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-11-12 02:03:25,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 100. [2023-11-12 02:03:25,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.2435897435897436) internal successors, (97), 87 states have internal predecessors, (97), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-12 02:03:25,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 122 transitions. [2023-11-12 02:03:25,510 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 122 transitions. Word has length 33 [2023-11-12 02:03:25,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:03:25,511 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 122 transitions. [2023-11-12 02:03:25,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 23 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-12 02:03:25,511 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 122 transitions. [2023-11-12 02:03:25,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-12 02:03:25,513 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:03:25,513 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:03:25,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fb78fd6-5011-4ebd-95b6-1570ed406117/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:03:25,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fb78fd6-5011-4ebd-95b6-1570ed406117/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-12 02:03:25,730 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:03:25,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:03:25,733 INFO L85 PathProgramCache]: Analyzing trace with hash -2126250852, now seen corresponding path program 1 times [2023-11-12 02:03:25,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:03:25,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065342492] [2023-11-12 02:03:25,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:25,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:03:25,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:26,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:03:26,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:26,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-12 02:03:26,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:27,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 02:03:27,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:03:27,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065342492] [2023-11-12 02:03:27,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065342492] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:03:27,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828101035] [2023-11-12 02:03:27,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:27,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:27,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fb78fd6-5011-4ebd-95b6-1570ed406117/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:03:27,414 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fb78fd6-5011-4ebd-95b6-1570ed406117/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:03:27,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fb78fd6-5011-4ebd-95b6-1570ed406117/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:03:27,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:03:27,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 70 conjunts are in the unsatisfiable core [2023-11-12 02:03:27,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:03:27,661 INFO L351 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 [2023-11-12 02:03:27,791 INFO L322 Elim1Store]: treesize reduction 50, result has 41.2 percent of original size [2023-11-12 02:03:27,791 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 104 [2023-11-12 02:03:27,808 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-11-12 02:03:27,826 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:03:27,827 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2023-11-12 02:03:27,853 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 26 [2023-11-12 02:03:28,076 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-12 02:03:28,076 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2023-11-12 02:03:28,225 INFO L322 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2023-11-12 02:03:28,225 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 28 [2023-11-12 02:03:28,241 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-11-12 02:03:28,321 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-11-12 02:03:28,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:03:28,713 INFO L322 Elim1Store]: treesize reduction 93, result has 35.9 percent of original size [2023-11-12 02:03:28,713 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 69 treesize of output 127 [2023-11-12 02:03:28,741 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-11-12 02:03:28,775 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-11-12 02:03:28,814 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:03:28,815 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 4 [2023-11-12 02:03:28,854 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-12 02:03:28,855 INFO L351 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 61 treesize of output 35 [2023-11-12 02:03:28,866 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-11-12 02:03:29,518 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:03:29,519 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 204 treesize of output 211 [2023-11-12 02:03:29,638 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2023-11-12 02:03:29,643 INFO L351 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 12 treesize of output 8 [2023-11-12 02:03:29,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:03:29,658 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:03:29,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828101035] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:03:29,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:03:29,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [17] total 26 [2023-11-12 02:03:29,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159202228] [2023-11-12 02:03:29,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:03:29,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-12 02:03:29,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:03:29,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-12 02:03:29,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2023-11-12 02:03:29,663 INFO L87 Difference]: Start difference. First operand 100 states and 122 transitions. Second operand has 17 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:03:31,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:03:31,488 INFO L93 Difference]: Finished difference Result 136 states and 169 transitions. [2023-11-12 02:03:31,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-12 02:03:31,489 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2023-11-12 02:03:31,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:03:31,491 INFO L225 Difference]: With dead ends: 136 [2023-11-12 02:03:31,491 INFO L226 Difference]: Without dead ends: 133 [2023-11-12 02:03:31,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2023-11-12 02:03:31,494 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 125 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 37 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:03:31,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 507 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1007 Invalid, 3 Unknown, 0 Unchecked, 1.3s Time] [2023-11-12 02:03:31,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-11-12 02:03:31,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 100. [2023-11-12 02:03:31,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 87 states have internal predecessors, (96), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-12 02:03:31,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 121 transitions. [2023-11-12 02:03:31,539 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 121 transitions. Word has length 35 [2023-11-12 02:03:31,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:03:31,541 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 121 transitions. [2023-11-12 02:03:31,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 02:03:31,541 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 121 transitions. [2023-11-12 02:03:31,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-12 02:03:31,543 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:03:31,544 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:03:31,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fb78fd6-5011-4ebd-95b6-1570ed406117/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-12 02:03:31,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fb78fd6-5011-4ebd-95b6-1570ed406117/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:03:31,751 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:03:31,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:03:31,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1965732536, now seen corresponding path program 1 times [2023-11-12 02:03:31,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:03:31,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473187594] [2023-11-12 02:03:31,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:03:31,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:03:31,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:03:31,833 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-12 02:03:31,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-12 02:03:31,923 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-12 02:03:31,924 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-12 02:03:31,925 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location failErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-12 02:03:31,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:03:31,931 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-12 02:03:31,936 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-11-12 02:03:31,985 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem22 [2023-11-12 02:03:31,986 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem21 [2023-11-12 02:03:32,005 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.11 02:03:32 BoogieIcfgContainer [2023-11-12 02:03:32,005 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-12 02:03:32,006 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-12 02:03:32,006 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-12 02:03:32,006 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-12 02:03:32,007 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:03:16" (3/4) ... [2023-11-12 02:03:32,008 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-12 02:03:32,032 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem22 [2023-11-12 02:03:32,032 WARN L1567 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem21 [2023-11-12 02:03:32,087 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fb78fd6-5011-4ebd-95b6-1570ed406117/bin/uautomizer-verify-uTZkv6EMXl/witness.graphml [2023-11-12 02:03:32,087 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-12 02:03:32,095 INFO L158 Benchmark]: Toolchain (without parser) took 17483.17ms. Allocated memory was 157.3MB in the beginning and 247.5MB in the end (delta: 90.2MB). Free memory was 116.8MB in the beginning and 137.2MB in the end (delta: -20.4MB). Peak memory consumption was 71.3MB. Max. memory is 16.1GB. [2023-11-12 02:03:32,097 INFO L158 Benchmark]: CDTParser took 0.55ms. Allocated memory is still 157.3MB. Free memory is still 131.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-12 02:03:32,097 INFO L158 Benchmark]: CACSL2BoogieTranslator took 731.73ms. Allocated memory is still 157.3MB. Free memory was 116.8MB in the beginning and 98.4MB in the end (delta: 18.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-12 02:03:32,098 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.07ms. Allocated memory is still 157.3MB. Free memory was 98.4MB in the beginning and 95.8MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-12 02:03:32,098 INFO L158 Benchmark]: Boogie Preprocessor took 72.99ms. Allocated memory is still 157.3MB. Free memory was 95.8MB in the beginning and 93.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-12 02:03:32,099 INFO L158 Benchmark]: RCFGBuilder took 997.86ms. Allocated memory is still 157.3MB. Free memory was 93.7MB in the beginning and 69.2MB in the end (delta: 24.5MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2023-11-12 02:03:32,100 INFO L158 Benchmark]: TraceAbstraction took 15524.07ms. Allocated memory was 157.3MB in the beginning and 247.5MB in the end (delta: 90.2MB). Free memory was 68.6MB in the beginning and 141.4MB in the end (delta: -72.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-11-12 02:03:32,100 INFO L158 Benchmark]: Witness Printer took 84.92ms. Allocated memory is still 247.5MB. Free memory was 141.4MB in the beginning and 137.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-12 02:03:32,104 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.55ms. Allocated memory is still 157.3MB. Free memory is still 131.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 731.73ms. Allocated memory is still 157.3MB. Free memory was 116.8MB in the beginning and 98.4MB in the end (delta: 18.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.07ms. Allocated memory is still 157.3MB. Free memory was 98.4MB in the beginning and 95.8MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 72.99ms. Allocated memory is still 157.3MB. Free memory was 95.8MB in the beginning and 93.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 997.86ms. Allocated memory is still 157.3MB. Free memory was 93.7MB in the beginning and 69.2MB in the end (delta: 24.5MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 15524.07ms. Allocated memory was 157.3MB in the beginning and 247.5MB in the end (delta: 90.2MB). Free memory was 68.6MB in the beginning and 141.4MB in the end (delta: -72.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Witness Printer took 84.92ms. Allocated memory is still 247.5MB. Free memory was 141.4MB in the beginning and 137.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem22 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem21 - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem22 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem21 - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 565]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L639] const struct node *p1, *p2; [L640] CALL, EXPR create_sll(&p1, &p2) [L588] struct node *list = ((void *)0); VAL [list={6:0}, pp1={5:0}, pp1={5:0}, pp2={7:0}, pp2={7:0}] [L590] CALL chain_node(&list) [L582] CALL, EXPR alloc_node() [L573] struct node *ptr = malloc(sizeof *ptr); [L574] COND FALSE !(!ptr) VAL [ptr={-1:0}] [L576] ptr->next = ((void *)0) [L577] ptr->prev = ((void *)0) [L578] return ptr; VAL [\result={-1:0}, ptr={-1:0}] [L582] RET, EXPR alloc_node() [L582] struct node *node = alloc_node(); [L583] EXPR \read(**ppnode) [L583] node->next = *ppnode [L584] *ppnode = node VAL [node={-1:0}, ppnode={6:0}, ppnode={6:0}] [L590] RET chain_node(&list) VAL [list={6:0}, pp1={5:0}, pp1={5:0}, pp2={7:0}, pp2={7:0}] [L591] COND FALSE !(__VERIFIER_nondet_int()) [L592] EXPR \read(*list) [L592] *pp2 = list [L593] COND FALSE !(__VERIFIER_nondet_int()) [L595] EXPR \read(*list) [L595] *pp1 = list [L597] CALL chain_node(&list) [L582] CALL, EXPR alloc_node() [L573] struct node *ptr = malloc(sizeof *ptr); [L574] COND FALSE !(!ptr) VAL [ptr={3:0}] [L576] ptr->next = ((void *)0) [L577] ptr->prev = ((void *)0) [L578] return ptr; VAL [\result={3:0}, ptr={3:0}] [L582] RET, EXPR alloc_node() [L582] struct node *node = alloc_node(); [L583] EXPR \read(**ppnode) [L583] node->next = *ppnode [L584] *ppnode = node VAL [node={3:0}, ppnode={6:0}, ppnode={6:0}] [L597] RET chain_node(&list) VAL [list={6:0}, pp1={5:0}, pp1={5:0}, pp2={7:0}, pp2={7:0}] [L598] COND FALSE !(__VERIFIER_nondet_int()) [L599] EXPR \read(*list) [L599] return list; [L588] struct node *list = ((void *)0); [L599] return list; VAL [\result={3:0}, pp1={5:0}, pp1={5:0}, pp2={7:0}, pp2={7:0}] [L640] RET, EXPR create_sll(&p1, &p2) [L640] struct node *list = create_sll(&p1, &p2); [L642] EXPR \read(*p1) [L642] EXPR \read(*p2) VAL [list={3:0}, p1={5:0}, p2={7:0}] [L642] CALL check_seq_next(p1, p2) VAL [beg={-1:0}, end={-1:0}] [L626] COND FALSE !(!(beg)) VAL [beg={-1:0}, beg={-1:0}, end={-1:0}, end={-1:0}] [L627] COND FALSE !(!(end)) VAL [beg={-1:0}, beg={-1:0}, end={-1:0}, end={-1:0}] [L628] EXPR beg->next [L628] beg = beg->next [L628] COND TRUE end != beg VAL [beg={-1:0}, beg={0:0}, end={-1:0}, end={-1:0}] [L629] COND TRUE !(beg) VAL [beg={-1:0}, beg={0:0}, end={-1:0}, end={-1:0}] [L629] CALL fail() [L565] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 97 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 15.4s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 4.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 4 mSolverCounterUnknown, 335 SdHoareTripleChecker+Valid, 3.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 327 mSDsluCounter, 1261 SdHoareTripleChecker+Invalid, 2.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1043 mSDsCounter, 99 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2172 IncrementalHoareTripleChecker+Invalid, 2275 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 99 mSolverCounterUnsat, 218 mSDtfsCounter, 2172 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 137 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 3.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=2, InterpolantAutomatonStates: 35, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 62 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 8.8s InterpolantComputationTime, 191 NumberOfCodeBlocks, 191 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 147 ConstructedInterpolants, 10 QuantifiedInterpolants, 4002 SizeOfPredicates, 47 NumberOfNonLiveVariables, 636 ConjunctsInSsa, 135 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 12/24 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-11-12 02:03:32,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9fb78fd6-5011-4ebd-95b6-1570ed406117/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE