./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_431df8a7-ce3b-4613-ab7d-49aab81ac844/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431df8a7-ce3b-4613-ab7d-49aab81ac844/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431df8a7-ce3b-4613-ab7d-49aab81ac844/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431df8a7-ce3b-4613-ab7d-49aab81ac844/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431df8a7-ce3b-4613-ab7d-49aab81ac844/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431df8a7-ce3b-4613-ab7d-49aab81ac844/bin/utaipan-verify-mE87zJ7Ire --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4caa1f295436b297cae57f4102149db941e37f67b5d377cc8e9aa7b58bbf9350 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:18:58,580 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:18:58,657 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431df8a7-ce3b-4613-ab7d-49aab81ac844/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:18:58,662 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:18:58,663 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:18:58,692 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:18:58,693 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:18:58,694 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:18:58,695 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:18:58,695 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:18:58,696 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:18:58,697 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:18:58,697 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:18:58,698 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:18:58,698 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:18:58,699 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:18:58,700 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:18:58,700 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:18:58,701 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:18:58,701 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:18:58,702 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:18:58,703 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:18:58,704 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:18:58,704 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:18:58,705 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:18:58,706 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:18:58,706 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:18:58,707 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:18:58,707 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:18:58,708 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:18:58,708 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:18:58,709 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:18:58,709 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:18:58,710 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:18:58,710 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:18:58,711 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:18:58,711 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:18:58,711 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:18:58,712 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:18:58,712 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:18:58,713 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:18:58,713 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:18:58,714 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:18:58,714 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:18:58,714 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:18:58,715 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:18:58,715 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:18:58,715 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_431df8a7-ce3b-4613-ab7d-49aab81ac844/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431df8a7-ce3b-4613-ab7d-49aab81ac844/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4caa1f295436b297cae57f4102149db941e37f67b5d377cc8e9aa7b58bbf9350 [2023-11-23 21:18:58,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:18:58,988 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:18:58,991 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:18:58,992 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:18:58,993 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:18:58,994 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431df8a7-ce3b-4613-ab7d-49aab81ac844/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c [2023-11-23 21:19:02,038 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:19:02,284 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:19:02,285 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431df8a7-ce3b-4613-ab7d-49aab81ac844/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c [2023-11-23 21:19:02,294 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431df8a7-ce3b-4613-ab7d-49aab81ac844/bin/utaipan-verify-mE87zJ7Ire/data/6d10c41b3/8144e62922704cc4b9c885b711a870c9/FLAG30c317628 [2023-11-23 21:19:02,308 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431df8a7-ce3b-4613-ab7d-49aab81ac844/bin/utaipan-verify-mE87zJ7Ire/data/6d10c41b3/8144e62922704cc4b9c885b711a870c9 [2023-11-23 21:19:02,311 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:19:02,313 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:19:02,314 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:19:02,314 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:19:02,320 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:19:02,321 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:19:02" (1/1) ... [2023-11-23 21:19:02,322 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78a97427 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:02, skipping insertion in model container [2023-11-23 21:19:02,322 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:19:02" (1/1) ... [2023-11-23 21:19:02,347 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:19:02,532 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_431df8a7-ce3b-4613-ab7d-49aab81ac844/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c[415,428] [2023-11-23 21:19:02,550 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:19:02,559 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:19:02,572 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_431df8a7-ce3b-4613-ab7d-49aab81ac844/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c[415,428] [2023-11-23 21:19:02,584 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:19:02,609 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:19:02,609 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:02 WrapperNode [2023-11-23 21:19:02,610 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:19:02,611 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:19:02,611 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:19:02,611 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:19:02,619 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:02" (1/1) ... [2023-11-23 21:19:02,625 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:02" (1/1) ... [2023-11-23 21:19:02,646 INFO L138 Inliner]: procedures = 15, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 79 [2023-11-23 21:19:02,646 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:19:02,647 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:19:02,647 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:19:02,647 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:19:02,659 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:02" (1/1) ... [2023-11-23 21:19:02,659 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:02" (1/1) ... [2023-11-23 21:19:02,662 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:02" (1/1) ... [2023-11-23 21:19:02,663 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:02" (1/1) ... [2023-11-23 21:19:02,669 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:02" (1/1) ... [2023-11-23 21:19:02,673 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:02" (1/1) ... [2023-11-23 21:19:02,674 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:02" (1/1) ... [2023-11-23 21:19:02,675 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:02" (1/1) ... [2023-11-23 21:19:02,678 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:19:02,679 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:19:02,679 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:19:02,679 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:19:02,680 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:02" (1/1) ... [2023-11-23 21:19:02,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:19:02,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431df8a7-ce3b-4613-ab7d-49aab81ac844/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:19:02,714 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431df8a7-ce3b-4613-ab7d-49aab81ac844/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:19:02,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431df8a7-ce3b-4613-ab7d-49aab81ac844/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:19:02,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:19:02,762 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:19:02,762 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:19:02,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:19:02,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:19:02,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:19:02,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:19:02,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:19:02,766 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:19:02,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:19:02,844 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:19:02,846 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:19:03,060 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:19:03,176 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:19:03,177 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-23 21:19:03,183 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:19:03 BoogieIcfgContainer [2023-11-23 21:19:03,183 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:19:03,185 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:19:03,185 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:19:03,189 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:19:03,189 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:19:02" (1/3) ... [2023-11-23 21:19:03,190 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@254475a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:19:03, skipping insertion in model container [2023-11-23 21:19:03,191 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:02" (2/3) ... [2023-11-23 21:19:03,192 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@254475a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:19:03, skipping insertion in model container [2023-11-23 21:19:03,192 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:19:03" (3/3) ... [2023-11-23 21:19:03,193 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_pair_symmetr2.c [2023-11-23 21:19:03,217 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:19:03,217 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:19:03,278 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:19:03,286 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=FINITE_AUTOMATA, 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;@636c6b1f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:19:03,287 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:19:03,291 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:19:03,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-23 21:19:03,301 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:03,302 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-23 21:19:03,303 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:03,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:03,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1119026146, now seen corresponding path program 1 times [2023-11-23 21:19:03,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:03,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723694744] [2023-11-23 21:19:03,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:03,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:03,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:19:03,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:03,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723694744] [2023-11-23 21:19:03,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723694744] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:03,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:19:03,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:19:03,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274163960] [2023-11-23 21:19:03,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:03,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:19:03,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:03,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:19:03,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:19:03,662 INFO L87 Difference]: Start difference. First operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:19:03,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:03,726 INFO L93 Difference]: Finished difference Result 27 states and 38 transitions. [2023-11-23 21:19:03,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:19:03,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-23 21:19:03,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:03,743 INFO L225 Difference]: With dead ends: 27 [2023-11-23 21:19:03,744 INFO L226 Difference]: Without dead ends: 19 [2023-11-23 21:19:03,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:19:03,752 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:03,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 16 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:19:03,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-23 21:19:03,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2023-11-23 21:19:03,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:19:03,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2023-11-23 21:19:03,795 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 6 [2023-11-23 21:19:03,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:03,795 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2023-11-23 21:19:03,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:19:03,796 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2023-11-23 21:19:03,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 21:19:03,797 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:03,798 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:19:03,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:19:03,798 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:03,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:03,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1522735512, now seen corresponding path program 1 times [2023-11-23 21:19:03,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:03,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326849226] [2023-11-23 21:19:03,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:03,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:03,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:03,990 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 21:19:03,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:03,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326849226] [2023-11-23 21:19:03,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326849226] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:03,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:19:03,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:19:03,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085063655] [2023-11-23 21:19:03,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:03,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:19:03,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:03,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:19:03,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:19:03,997 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:19:04,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:04,096 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2023-11-23 21:19:04,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:19:04,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2023-11-23 21:19:04,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:04,100 INFO L225 Difference]: With dead ends: 25 [2023-11-23 21:19:04,100 INFO L226 Difference]: Without dead ends: 20 [2023-11-23 21:19:04,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:19:04,109 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:04,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 9 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:19:04,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-23 21:19:04,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2023-11-23 21:19:04,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:19:04,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2023-11-23 21:19:04,128 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 17 [2023-11-23 21:19:04,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:04,128 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2023-11-23 21:19:04,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:19:04,130 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2023-11-23 21:19:04,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-23 21:19:04,132 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:04,132 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:19:04,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:19:04,133 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:04,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:04,145 INFO L85 PathProgramCache]: Analyzing trace with hash -47647524, now seen corresponding path program 1 times [2023-11-23 21:19:04,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:04,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775557384] [2023-11-23 21:19:04,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:04,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:04,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:04,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 21:19:04,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:04,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775557384] [2023-11-23 21:19:04,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775557384] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:19:04,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990247230] [2023-11-23 21:19:04,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:04,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:19:04,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431df8a7-ce3b-4613-ab7d-49aab81ac844/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:19:04,315 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431df8a7-ce3b-4613-ab7d-49aab81ac844/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:19:04,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431df8a7-ce3b-4613-ab7d-49aab81ac844/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:19:04,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:04,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:19:04,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:19:04,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 21:19:04,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:19:04,720 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 21:19:04,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990247230] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:19:04,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [498728047] [2023-11-23 21:19:04,753 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-11-23 21:19:04,754 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:19:04,764 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:19:04,772 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:19:04,772 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:19:08,589 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-23 21:19:08,593 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:19:09,979 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '262#(and (= |ULTIMATE.start_main_~i~0#1| 1) (<= |ULTIMATE.start_main_#t~mem11#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 ~N~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| 4)) |ULTIMATE.start_main_#t~mem11#1|))' at error location [2023-11-23 21:19:09,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:19:09,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:19:09,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-23 21:19:09,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13536062] [2023-11-23 21:19:09,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:19:09,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 21:19:09,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:09,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 21:19:09,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-11-23 21:19:09,983 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 21:19:10,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:10,164 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2023-11-23 21:19:10,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:19:10,165 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 18 [2023-11-23 21:19:10,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:10,167 INFO L225 Difference]: With dead ends: 52 [2023-11-23 21:19:10,167 INFO L226 Difference]: Without dead ends: 45 [2023-11-23 21:19:10,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2023-11-23 21:19:10,169 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 51 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:10,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 18 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:19:10,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-23 21:19:10,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2023-11-23 21:19:10,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-23 21:19:10,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 47 transitions. [2023-11-23 21:19:10,184 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 47 transitions. Word has length 18 [2023-11-23 21:19:10,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:10,185 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 47 transitions. [2023-11-23 21:19:10,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 21:19:10,185 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 47 transitions. [2023-11-23 21:19:10,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-23 21:19:10,188 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:10,188 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-23 21:19:10,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431df8a7-ce3b-4613-ab7d-49aab81ac844/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:19:10,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431df8a7-ce3b-4613-ab7d-49aab81ac844/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:19:10,402 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:10,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:10,403 INFO L85 PathProgramCache]: Analyzing trace with hash 452743582, now seen corresponding path program 2 times [2023-11-23 21:19:10,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:10,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275545382] [2023-11-23 21:19:10,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:10,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:10,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2023-11-23 21:19:10,828 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:10,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275545382] [2023-11-23 21:19:10,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275545382] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:19:10,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635112436] [2023-11-23 21:19:10,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:19:10,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:19:10,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431df8a7-ce3b-4613-ab7d-49aab81ac844/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:19:10,831 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431df8a7-ce3b-4613-ab7d-49aab81ac844/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:19:10,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431df8a7-ce3b-4613-ab7d-49aab81ac844/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:19:10,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-23 21:19:10,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:19:10,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:19:10,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:19:11,193 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2023-11-23 21:19:11,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:19:11,365 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2023-11-23 21:19:11,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635112436] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:19:11,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [893371792] [2023-11-23 21:19:11,368 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-11-23 21:19:11,370 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:19:11,371 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:19:11,372 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:19:11,372 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:19:14,453 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-23 21:19:14,455 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:19:16,005 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '753#(and (= |ULTIMATE.start_main_~i~0#1| 1) (<= |ULTIMATE.start_main_#t~mem11#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 ~N~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| 4)) |ULTIMATE.start_main_#t~mem11#1|))' at error location [2023-11-23 21:19:16,006 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:19:16,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:19:16,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 19 [2023-11-23 21:19:16,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073552889] [2023-11-23 21:19:16,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:19:16,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-23 21:19:16,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:16,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-23 21:19:16,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=617, Unknown=0, NotChecked=0, Total=812 [2023-11-23 21:19:16,014 INFO L87 Difference]: Start difference. First operand 34 states and 47 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2023-11-23 21:19:16,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:16,580 INFO L93 Difference]: Finished difference Result 121 states and 165 transitions. [2023-11-23 21:19:16,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 21:19:16,581 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 54 [2023-11-23 21:19:16,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:16,585 INFO L225 Difference]: With dead ends: 121 [2023-11-23 21:19:16,585 INFO L226 Difference]: Without dead ends: 111 [2023-11-23 21:19:16,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=271, Invalid=851, Unknown=0, NotChecked=0, Total=1122 [2023-11-23 21:19:16,588 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 189 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:16,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 42 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:19:16,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-11-23 21:19:16,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 70. [2023-11-23 21:19:16,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 30 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-23 21:19:16,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 101 transitions. [2023-11-23 21:19:16,640 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 101 transitions. Word has length 54 [2023-11-23 21:19:16,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:16,641 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 101 transitions. [2023-11-23 21:19:16,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2023-11-23 21:19:16,642 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 101 transitions. [2023-11-23 21:19:16,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-11-23 21:19:16,650 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:16,650 INFO L195 NwaCegarLoop]: trace histogram [30, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2023-11-23 21:19:16,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431df8a7-ce3b-4613-ab7d-49aab81ac844/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:19:16,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431df8a7-ce3b-4613-ab7d-49aab81ac844/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:19:16,874 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:16,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:16,875 INFO L85 PathProgramCache]: Analyzing trace with hash 758889950, now seen corresponding path program 3 times [2023-11-23 21:19:16,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:16,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411283209] [2023-11-23 21:19:16,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:16,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:17,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:17,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2023-11-23 21:19:17,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:17,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411283209] [2023-11-23 21:19:17,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411283209] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:19:17,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467987899] [2023-11-23 21:19:17,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 21:19:17,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:19:17,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431df8a7-ce3b-4613-ab7d-49aab81ac844/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:19:17,796 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431df8a7-ce3b-4613-ab7d-49aab81ac844/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:19:17,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431df8a7-ce3b-4613-ab7d-49aab81ac844/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:19:19,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 21:19:19,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:19:19,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 21:19:19,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:19:19,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2023-11-23 21:19:19,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:19:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2023-11-23 21:19:20,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467987899] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:19:20,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [145071664] [2023-11-23 21:19:20,513 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-11-23 21:19:20,513 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:19:20,513 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:19:20,514 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:19:20,514 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:19:23,336 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-23 21:19:23,339 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:19:24,760 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1873#(and (= |ULTIMATE.start_main_~i~0#1| 1) (<= |ULTIMATE.start_main_#t~mem11#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 ~N~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| 4)) |ULTIMATE.start_main_#t~mem11#1|))' at error location [2023-11-23 21:19:24,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:19:24,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:19:24,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2023-11-23 21:19:24,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692682421] [2023-11-23 21:19:24,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:19:24,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-23 21:19:24,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:24,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-23 21:19:24,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=607, Invalid=1463, Unknown=0, NotChecked=0, Total=2070 [2023-11-23 21:19:24,770 INFO L87 Difference]: Start difference. First operand 70 states and 101 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 30 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (90), 30 states have call predecessors, (90), 30 states have call successors, (90) [2023-11-23 21:19:26,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:26,244 INFO L93 Difference]: Finished difference Result 259 states and 351 transitions. [2023-11-23 21:19:26,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-23 21:19:26,246 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 30 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (90), 30 states have call predecessors, (90), 30 states have call successors, (90) Word has length 126 [2023-11-23 21:19:26,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:26,251 INFO L225 Difference]: With dead ends: 259 [2023-11-23 21:19:26,252 INFO L226 Difference]: Without dead ends: 243 [2023-11-23 21:19:26,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1290 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=894, Invalid=2298, Unknown=0, NotChecked=0, Total=3192 [2023-11-23 21:19:26,256 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 450 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:26,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 84 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 21:19:26,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2023-11-23 21:19:26,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 142. [2023-11-23 21:19:26,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 66 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-23 21:19:26,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 209 transitions. [2023-11-23 21:19:26,306 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 209 transitions. Word has length 126 [2023-11-23 21:19:26,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:26,307 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 209 transitions. [2023-11-23 21:19:26,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 30 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (90), 30 states have call predecessors, (90), 30 states have call successors, (90) [2023-11-23 21:19:26,308 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 209 transitions. [2023-11-23 21:19:26,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2023-11-23 21:19:26,316 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:26,316 INFO L195 NwaCegarLoop]: trace histogram [66, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2023-11-23 21:19:26,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431df8a7-ce3b-4613-ab7d-49aab81ac844/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:19:26,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431df8a7-ce3b-4613-ab7d-49aab81ac844/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:19:26,530 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:26,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:26,531 INFO L85 PathProgramCache]: Analyzing trace with hash 157304414, now seen corresponding path program 4 times [2023-11-23 21:19:26,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:26,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817915324] [2023-11-23 21:19:26,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:26,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:26,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:29,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5720 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4543 trivial. 0 not checked. [2023-11-23 21:19:29,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:29,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817915324] [2023-11-23 21:19:29,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817915324] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:19:29,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310418298] [2023-11-23 21:19:29,168 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 21:19:29,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:19:29,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431df8a7-ce3b-4613-ab7d-49aab81ac844/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:19:29,171 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431df8a7-ce3b-4613-ab7d-49aab81ac844/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:19:29,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431df8a7-ce3b-4613-ab7d-49aab81ac844/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:19:29,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:29,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 1063 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-23 21:19:29,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:19:30,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5720 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4543 trivial. 0 not checked. [2023-11-23 21:19:30,860 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:19:32,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5720 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4543 trivial. 0 not checked. [2023-11-23 21:19:32,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310418298] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:19:32,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1972497226] [2023-11-23 21:19:32,441 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-11-23 21:19:32,441 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:19:32,442 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:19:32,442 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:19:32,443 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:19:35,200 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 1 for LOIs [2023-11-23 21:19:35,203 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:19:36,885 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4253#(and (= |ULTIMATE.start_main_~i~0#1| 1) (<= |ULTIMATE.start_main_#t~mem11#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 2 ~N~0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| 4)) |ULTIMATE.start_main_#t~mem11#1|))' at error location [2023-11-23 21:19:36,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:19:36,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:19:36,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 72 [2023-11-23 21:19:36,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477191897] [2023-11-23 21:19:36,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:19:36,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-11-23 21:19:36,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:36,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-11-23 21:19:36,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2323, Invalid=4319, Unknown=0, NotChecked=0, Total=6642 [2023-11-23 21:19:36,906 INFO L87 Difference]: Start difference. First operand 142 states and 209 transitions. Second operand has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 66 states have call successors, (198), 2 states have call predecessors, (198), 2 states have return successors, (198), 66 states have call predecessors, (198), 66 states have call successors, (198) [2023-11-23 21:19:40,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:40,093 INFO L93 Difference]: Finished difference Result 535 states and 723 transitions. [2023-11-23 21:19:40,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-23 21:19:40,095 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 66 states have call successors, (198), 2 states have call predecessors, (198), 2 states have return successors, (198), 66 states have call predecessors, (198), 66 states have call successors, (198) Word has length 270 [2023-11-23 21:19:40,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:40,103 INFO L225 Difference]: With dead ends: 535 [2023-11-23 21:19:40,103 INFO L226 Difference]: Without dead ends: 507 [2023-11-23 21:19:40,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 856 GetRequests, 753 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4338 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=3474, Invalid=7446, Unknown=0, NotChecked=0, Total=10920 [2023-11-23 21:19:40,109 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1072 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 513 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1075 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 513 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:40,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1075 Valid, 174 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [513 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-23 21:19:40,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2023-11-23 21:19:40,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 286. [2023-11-23 21:19:40,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 146 states have (on average 1.0205479452054795) internal successors, (149), 146 states have internal predecessors, (149), 138 states have call successors, (138), 1 states have call predecessors, (138), 1 states have return successors, (138), 138 states have call predecessors, (138), 138 states have call successors, (138) [2023-11-23 21:19:40,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 425 transitions. [2023-11-23 21:19:40,189 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 425 transitions. Word has length 270 [2023-11-23 21:19:40,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:40,191 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 425 transitions. [2023-11-23 21:19:40,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 66 states have call successors, (198), 2 states have call predecessors, (198), 2 states have return successors, (198), 66 states have call predecessors, (198), 66 states have call successors, (198) [2023-11-23 21:19:40,192 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 425 transitions. [2023-11-23 21:19:40,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2023-11-23 21:19:40,211 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:40,212 INFO L195 NwaCegarLoop]: trace histogram [138, 46, 46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2023-11-23 21:19:40,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431df8a7-ce3b-4613-ab7d-49aab81ac844/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-23 21:19:40,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_431df8a7-ce3b-4613-ab7d-49aab81ac844/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:19:40,412 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:40,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:40,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1284499618, now seen corresponding path program 5 times [2023-11-23 21:19:40,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:40,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004807201] [2023-11-23 21:19:40,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:40,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:40,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat