./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_strcmp_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b 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_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_strcmp_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --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 c802cbda9e8bed6a313e86b45d5d1f15426dd1417288149156d2bae000d97c78 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:27:30,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:27:30,020 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:27:30,063 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:27:30,065 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:27:30,069 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:27:30,072 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:27:30,076 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:27:30,078 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:27:30,083 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:27:30,085 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:27:30,086 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:27:30,088 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:27:30,091 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:27:30,093 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:27:30,094 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:27:30,097 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:27:30,102 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:27:30,103 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:27:30,105 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:27:30,110 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:27:30,111 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:27:30,112 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:27:30,114 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:27:30,117 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:27:30,122 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:27:30,122 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:27:30,123 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:27:30,124 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:27:30,125 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:27:30,126 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:27:30,127 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:27:30,129 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:27:30,130 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:27:30,132 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:27:30,133 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:27:30,134 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:27:30,134 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:27:30,135 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:27:30,135 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:27:30,136 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:27:30,137 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:27:30,166 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:27:30,166 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:27:30,168 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:27:30,168 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:27:30,169 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:27:30,169 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:27:30,169 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:27:30,170 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:27:30,170 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:27:30,170 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:27:30,171 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:27:30,171 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:27:30,171 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:27:30,172 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:27:30,172 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:27:30,172 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:27:30,172 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:27:30,172 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:27:30,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:27:30,173 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:27:30,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:27:30,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:27:30,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:27:30,176 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:27:30,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:27:30,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:27:30,176 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:27:30,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:27:30,176 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:27:30,177 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:27:30,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:27:30,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:27:30,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:27:30,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:27:30,178 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:27:30,178 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:27:30,178 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:27:30,178 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:27:30,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:27:30,179 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:27:30,179 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:27:30,179 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c802cbda9e8bed6a313e86b45d5d1f15426dd1417288149156d2bae000d97c78 [2022-11-19 07:27:30,474 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:27:30,497 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:27:30,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:27:30,503 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:27:30,504 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:27:30,505 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/array-examples/standard_strcmp_ground.i [2022-11-19 07:27:30,611 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/data/f916b883c/b0cf37d7bd4e41578a57801c37ea498d/FLAG98582f634 [2022-11-19 07:27:31,156 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:27:31,157 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/sv-benchmarks/c/array-examples/standard_strcmp_ground.i [2022-11-19 07:27:31,165 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/data/f916b883c/b0cf37d7bd4e41578a57801c37ea498d/FLAG98582f634 [2022-11-19 07:27:31,607 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/data/f916b883c/b0cf37d7bd4e41578a57801c37ea498d [2022-11-19 07:27:31,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:27:31,611 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:27:31,613 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:27:31,613 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:27:31,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:27:31,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:27:31" (1/1) ... [2022-11-19 07:27:31,623 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11259a46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:31, skipping insertion in model container [2022-11-19 07:27:31,623 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:27:31" (1/1) ... [2022-11-19 07:27:31,631 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:27:31,646 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:27:31,848 WARN L234 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_db86a98b-b7ea-4fe5-add2-a33b609b97b6/sv-benchmarks/c/array-examples/standard_strcmp_ground.i[815,828] [2022-11-19 07:27:31,872 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:27:31,881 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:27:31,901 WARN L234 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_db86a98b-b7ea-4fe5-add2-a33b609b97b6/sv-benchmarks/c/array-examples/standard_strcmp_ground.i[815,828] [2022-11-19 07:27:31,924 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:27:31,944 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:27:31,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:31 WrapperNode [2022-11-19 07:27:31,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:27:31,946 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:27:31,946 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:27:31,946 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:27:31,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:31" (1/1) ... [2022-11-19 07:27:31,964 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:31" (1/1) ... [2022-11-19 07:27:31,990 INFO L138 Inliner]: procedures = 17, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2022-11-19 07:27:31,991 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:27:31,992 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:27:31,992 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:27:31,993 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:27:32,002 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:31" (1/1) ... [2022-11-19 07:27:32,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:31" (1/1) ... [2022-11-19 07:27:32,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:31" (1/1) ... [2022-11-19 07:27:32,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:31" (1/1) ... [2022-11-19 07:27:32,026 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:31" (1/1) ... [2022-11-19 07:27:32,030 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:31" (1/1) ... [2022-11-19 07:27:32,037 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:31" (1/1) ... [2022-11-19 07:27:32,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:31" (1/1) ... [2022-11-19 07:27:32,044 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:27:32,045 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:27:32,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:27:32,046 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:27:32,047 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:31" (1/1) ... [2022-11-19 07:27:32,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:27:32,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:32,084 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:27:32,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:27:32,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:27:32,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:27:32,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:27:32,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:27:32,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:27:32,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:27:32,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:27:32,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:27:32,251 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:27:32,253 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:27:32,477 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:27:32,531 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:27:32,531 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-19 07:27:32,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:27:32 BoogieIcfgContainer [2022-11-19 07:27:32,534 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:27:32,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:27:32,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:27:32,557 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:27:32,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:27:31" (1/3) ... [2022-11-19 07:27:32,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bc9026e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:27:32, skipping insertion in model container [2022-11-19 07:27:32,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:27:31" (2/3) ... [2022-11-19 07:27:32,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bc9026e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:27:32, skipping insertion in model container [2022-11-19 07:27:32,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:27:32" (3/3) ... [2022-11-19 07:27:32,561 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_strcmp_ground.i [2022-11-19 07:27:32,579 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:27:32,580 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:27:32,658 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:27:32,670 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=LoopsAndPotentialCycles, 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;@48d41856, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:27:32,671 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:27:32,675 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:32,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:27:32,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:32,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:32,689 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:32,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:32,697 INFO L85 PathProgramCache]: Analyzing trace with hash -715237656, now seen corresponding path program 1 times [2022-11-19 07:27:32,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:32,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129166842] [2022-11-19 07:27:32,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:32,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:32,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:32,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:32,964 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:32,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129166842] [2022-11-19 07:27:32,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129166842] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:32,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:27:32,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:27:32,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795417418] [2022-11-19 07:27:32,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:32,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:27:32,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:33,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:27:33,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:27:33,018 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 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) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:33,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:33,065 INFO L93 Difference]: Finished difference Result 25 states and 35 transitions. [2022-11-19 07:27:33,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:27:33,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2022-11-19 07:27:33,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:33,076 INFO L225 Difference]: With dead ends: 25 [2022-11-19 07:27:33,076 INFO L226 Difference]: Without dead ends: 12 [2022-11-19 07:27:33,083 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 [2022-11-19 07:27:33,086 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:33,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:27:33,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-19 07:27:33,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-19 07:27:33,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:33,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2022-11-19 07:27:33,118 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 8 [2022-11-19 07:27:33,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:33,118 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2022-11-19 07:27:33,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:33,119 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2022-11-19 07:27:33,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:27:33,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:33,120 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:33,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:27:33,121 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:33,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:33,121 INFO L85 PathProgramCache]: Analyzing trace with hash 352703344, now seen corresponding path program 1 times [2022-11-19 07:27:33,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:33,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376659300] [2022-11-19 07:27:33,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:33,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:33,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:33,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:33,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:33,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376659300] [2022-11-19 07:27:33,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376659300] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:33,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409352079] [2022-11-19 07:27:33,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:33,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:33,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:33,311 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:33,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:27:33,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:33,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:27:33,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:33,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:27:33,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:27:33,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409352079] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:33,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:27:33,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-19 07:27:33,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954964852] [2022-11-19 07:27:33,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:33,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:27:33,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:33,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:27:33,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:27:33,416 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:33,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:33,439 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2022-11-19 07:27:33,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:27:33,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2022-11-19 07:27:33,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:33,441 INFO L225 Difference]: With dead ends: 28 [2022-11-19 07:27:33,441 INFO L226 Difference]: Without dead ends: 21 [2022-11-19 07:27:33,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:27:33,443 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:33,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 14 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:27:33,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-19 07:27:33,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 13. [2022-11-19 07:27:33,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:33,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-11-19 07:27:33,449 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2022-11-19 07:27:33,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:33,449 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-11-19 07:27:33,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:33,450 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-11-19 07:27:33,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:27:33,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:33,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:33,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:33,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:33,660 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:33,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:33,661 INFO L85 PathProgramCache]: Analyzing trace with hash -201190691, now seen corresponding path program 1 times [2022-11-19 07:27:33,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:33,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456134659] [2022-11-19 07:27:33,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:33,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:33,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:33,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:33,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:33,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456134659] [2022-11-19 07:27:33,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456134659] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:33,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210351146] [2022-11-19 07:27:33,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:33,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:33,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:33,872 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:33,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:27:33,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:33,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:27:33,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:34,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:34,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:34,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:27:34,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210351146] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:27:34,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [252925961] [2022-11-19 07:27:34,103 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:27:34,106 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:27:34,110 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:27:34,119 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:27:34,120 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:27:34,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:34,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:34,342 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 07:27:34,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 07:27:34,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:34,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:34,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-19 07:27:34,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:34,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:34,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 07:27:34,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:34,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:34,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:34,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:34,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:34,721 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 07:27:34,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 284 treesize of output 274 [2022-11-19 07:27:35,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:35,252 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:27:35,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:27:35,307 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:27:35,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [252925961] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:35,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:27:35,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 3, 3] total 11 [2022-11-19 07:27:35,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266721258] [2022-11-19 07:27:35,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:35,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:27:35,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:35,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:27:35,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:27:35,589 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:35,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:35,681 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2022-11-19 07:27:35,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:27:35,683 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 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 10 [2022-11-19 07:27:35,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:35,684 INFO L225 Difference]: With dead ends: 21 [2022-11-19 07:27:35,684 INFO L226 Difference]: Without dead ends: 14 [2022-11-19 07:27:35,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:27:35,697 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 18 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:35,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 18 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:27:35,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-19 07:27:35,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-19 07:27:35,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:35,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2022-11-19 07:27:35,705 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 10 [2022-11-19 07:27:35,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:35,706 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2022-11-19 07:27:35,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:35,706 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2022-11-19 07:27:35,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:27:35,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:35,707 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:35,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:35,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:35,913 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:35,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:35,913 INFO L85 PathProgramCache]: Analyzing trace with hash 975217493, now seen corresponding path program 1 times [2022-11-19 07:27:35,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:35,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947095673] [2022-11-19 07:27:35,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:35,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:35,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:36,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:27:36,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:36,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947095673] [2022-11-19 07:27:36,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947095673] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:36,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191557851] [2022-11-19 07:27:36,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:36,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:36,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:36,047 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:36,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:27:36,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:36,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:27:36,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:36,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:27:36,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:36,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:27:36,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191557851] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:27:36,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1709873414] [2022-11-19 07:27:36,177 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:27:36,178 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:27:36,178 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:27:36,178 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:27:36,178 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:27:36,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:36,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:36,243 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-19 07:27:36,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-19 07:27:36,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:36,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:36,315 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 07:27:36,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 07:27:36,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:36,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:36,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 07:27:36,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:36,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:36,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:36,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:36,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:36,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:36,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:36,524 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 07:27:36,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 304 treesize of output 272 [2022-11-19 07:27:36,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:36,626 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:27:36,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:27:36,824 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:27:37,643 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '339#(and (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (= |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start__strcmp_#res#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:27:37,643 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:27:37,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:27:37,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-19 07:27:37,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506622535] [2022-11-19 07:27:37,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:27:37,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:27:37,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:37,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:27:37,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:27:37,645 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:37,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:37,680 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2022-11-19 07:27:37,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:27:37,681 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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 11 [2022-11-19 07:27:37,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:37,682 INFO L225 Difference]: With dead ends: 28 [2022-11-19 07:27:37,682 INFO L226 Difference]: Without dead ends: 17 [2022-11-19 07:27:37,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:27:37,686 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:37,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:27:37,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-19 07:27:37,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-19 07:27:37,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:37,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-11-19 07:27:37,692 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2022-11-19 07:27:37,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:37,692 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-11-19 07:27:37,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:37,692 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-11-19 07:27:37,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 07:27:37,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:37,693 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:37,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:37,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:37,898 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:37,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:37,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1636529459, now seen corresponding path program 2 times [2022-11-19 07:27:37,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:37,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099124704] [2022-11-19 07:27:37,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:37,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:37,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:37,973 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:27:37,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:37,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099124704] [2022-11-19 07:27:37,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099124704] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:37,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809711437] [2022-11-19 07:27:37,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:27:37,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:37,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:37,975 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:38,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:27:38,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 07:27:38,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:27:38,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:27:38,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:38,068 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:27:38,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:27:38,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809711437] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:27:38,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1144426774] [2022-11-19 07:27:38,085 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:27:38,086 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:27:38,086 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:27:38,086 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:27:38,086 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:27:38,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:38,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:38,130 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-19 07:27:38,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-19 07:27:38,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:38,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:38,205 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 07:27:38,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 07:27:38,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:38,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:38,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 07:27:38,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:38,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:38,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:38,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:38,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:38,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:38,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:38,381 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 07:27:38,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 304 treesize of output 272 [2022-11-19 07:27:38,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:38,458 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:27:38,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:27:38,632 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:27:39,363 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '498#(and (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (= |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start__strcmp_#res#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:27:39,363 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:27:39,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:27:39,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-19 07:27:39,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668670963] [2022-11-19 07:27:39,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:27:39,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:27:39,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:39,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:27:39,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:27:39,365 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:39,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:39,423 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-11-19 07:27:39,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:27:39,424 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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 14 [2022-11-19 07:27:39,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:39,425 INFO L225 Difference]: With dead ends: 50 [2022-11-19 07:27:39,425 INFO L226 Difference]: Without dead ends: 43 [2022-11-19 07:27:39,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:27:39,426 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 54 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:39,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 34 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:27:39,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-19 07:27:39,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 22. [2022-11-19 07:27:39,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:39,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-11-19 07:27:39,433 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 14 [2022-11-19 07:27:39,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:39,434 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-11-19 07:27:39,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:39,434 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-11-19 07:27:39,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 07:27:39,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:39,435 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:39,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:39,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:39,641 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:39,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:39,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1737865440, now seen corresponding path program 1 times [2022-11-19 07:27:39,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:39,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433748279] [2022-11-19 07:27:39,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:39,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:39,707 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:27:39,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:39,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433748279] [2022-11-19 07:27:39,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433748279] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:27:39,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:27:39,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:27:39,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727780420] [2022-11-19 07:27:39,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:27:39,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:27:39,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:39,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:27:39,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:27:39,709 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:39,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:39,732 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2022-11-19 07:27:39,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:27:39,732 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 15 [2022-11-19 07:27:39,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:39,733 INFO L225 Difference]: With dead ends: 29 [2022-11-19 07:27:39,733 INFO L226 Difference]: Without dead ends: 22 [2022-11-19 07:27:39,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:27:39,734 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:39,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 22 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:27:39,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-19 07:27:39,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-19 07:27:39,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:39,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-11-19 07:27:39,740 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2022-11-19 07:27:39,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:39,740 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-11-19 07:27:39,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:39,740 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-11-19 07:27:39,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 07:27:39,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:39,741 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:39,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:27:39,741 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:39,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:39,742 INFO L85 PathProgramCache]: Analyzing trace with hash 141189372, now seen corresponding path program 3 times [2022-11-19 07:27:39,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:39,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252219401] [2022-11-19 07:27:39,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:39,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:39,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:39,843 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 07:27:39,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:39,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252219401] [2022-11-19 07:27:39,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252219401] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:39,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960878598] [2022-11-19 07:27:39,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:27:39,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:39,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:39,845 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:39,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:27:39,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:27:39,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:27:39,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:27:39,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:40,008 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:27:40,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:40,086 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:27:40,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960878598] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:27:40,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2136265167] [2022-11-19 07:27:40,088 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:27:40,088 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:27:40,088 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:27:40,089 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:27:40,089 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:27:40,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:40,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:40,144 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 07:27:40,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 07:27:40,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:40,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:40,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-19 07:27:40,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:40,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:40,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 07:27:40,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:40,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:40,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:40,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:40,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:40,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:40,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:40,300 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 07:27:40,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 304 treesize of output 272 [2022-11-19 07:27:40,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:40,372 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:27:40,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:27:40,529 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:27:41,381 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '823#(and (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (= |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start__strcmp_#res#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:27:41,382 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:27:41,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:27:41,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2022-11-19 07:27:41,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24980213] [2022-11-19 07:27:41,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:27:41,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 07:27:41,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:41,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 07:27:41,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2022-11-19 07:27:41,384 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:41,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:41,470 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2022-11-19 07:27:41,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 07:27:41,470 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 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 20 [2022-11-19 07:27:41,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:41,471 INFO L225 Difference]: With dead ends: 51 [2022-11-19 07:27:41,471 INFO L226 Difference]: Without dead ends: 35 [2022-11-19 07:27:41,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2022-11-19 07:27:41,475 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:41,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 36 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:27:41,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-19 07:27:41,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-19 07:27:41,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:41,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-11-19 07:27:41,482 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 20 [2022-11-19 07:27:41,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:41,483 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-11-19 07:27:41,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:41,483 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-11-19 07:27:41,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-19 07:27:41,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:41,484 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:41,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:41,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:41,690 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:41,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:41,690 INFO L85 PathProgramCache]: Analyzing trace with hash 536609826, now seen corresponding path program 4 times [2022-11-19 07:27:41,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:41,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17266479] [2022-11-19 07:27:41,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:41,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:41,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-19 07:27:41,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:41,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17266479] [2022-11-19 07:27:41,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17266479] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:41,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20813862] [2022-11-19 07:27:41,859 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:27:41,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:41,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:41,861 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:41,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:27:41,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:41,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 07:27:41,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:42,002 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-19 07:27:42,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-19 07:27:42,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20813862] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:27:42,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1580107161] [2022-11-19 07:27:42,094 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:27:42,094 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:27:42,095 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:27:42,095 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:27:42,095 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:27:42,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:42,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:42,148 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-19 07:27:42,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-19 07:27:42,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:42,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:42,198 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 07:27:42,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 07:27:42,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:42,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:42,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 07:27:42,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:42,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:42,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:42,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:42,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:42,367 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 07:27:42,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 284 treesize of output 274 [2022-11-19 07:27:42,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:42,629 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:27:42,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:27:42,751 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:27:43,605 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1168#(and (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (= |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start__strcmp_#res#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:27:43,605 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:27:43,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:27:43,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-11-19 07:27:43,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217139624] [2022-11-19 07:27:43,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:27:43,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 07:27:43,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:43,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 07:27:43,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2022-11-19 07:27:43,608 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:43,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:43,662 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2022-11-19 07:27:43,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 07:27:43,663 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 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 33 [2022-11-19 07:27:43,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:43,663 INFO L225 Difference]: With dead ends: 70 [2022-11-19 07:27:43,664 INFO L226 Difference]: Without dead ends: 42 [2022-11-19 07:27:43,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2022-11-19 07:27:43,665 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:43,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:27:43,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-19 07:27:43,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-11-19 07:27:43,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:43,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2022-11-19 07:27:43,673 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 33 [2022-11-19 07:27:43,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:43,673 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2022-11-19 07:27:43,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:43,674 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2022-11-19 07:27:43,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-19 07:27:43,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:43,675 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:43,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:43,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:43,879 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:43,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:43,879 INFO L85 PathProgramCache]: Analyzing trace with hash 126903194, now seen corresponding path program 5 times [2022-11-19 07:27:43,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:43,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650845414] [2022-11-19 07:27:43,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:43,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:44,271 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-19 07:27:44,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:44,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650845414] [2022-11-19 07:27:44,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650845414] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:44,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221904443] [2022-11-19 07:27:44,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:27:44,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:44,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:44,274 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:44,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:27:44,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:27:44,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:27:44,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-19 07:27:44,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:44,702 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-11-19 07:27:44,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:44,886 INFO L321 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2022-11-19 07:27:44,887 INFO L350 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 75 [2022-11-19 07:27:45,150 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-11-19 07:27:45,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221904443] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:27:45,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [608684453] [2022-11-19 07:27:45,152 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-19 07:27:45,152 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:27:45,153 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:27:45,153 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:27:45,153 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:27:45,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:45,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:45,198 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-19 07:27:45,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-19 07:27:45,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:45,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:45,254 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 07:27:45,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 07:27:45,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:45,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:45,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 07:27:45,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:45,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:45,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:45,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:45,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:45,426 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 07:27:45,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 284 treesize of output 274 [2022-11-19 07:27:45,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:45,682 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:27:45,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:27:45,849 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:27:47,138 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1613#(and (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (= |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start__strcmp_#res#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:27:47,138 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:27:47,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:27:47,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 26 [2022-11-19 07:27:47,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173687139] [2022-11-19 07:27:47,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:27:47,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 07:27:47,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:47,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 07:27:47,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2022-11-19 07:27:47,141 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:47,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:47,657 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2022-11-19 07:27:47,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-19 07:27:47,658 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 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 40 [2022-11-19 07:27:47,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:47,659 INFO L225 Difference]: With dead ends: 75 [2022-11-19 07:27:47,659 INFO L226 Difference]: Without dead ends: 47 [2022-11-19 07:27:47,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 91 SyntacticMatches, 10 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=426, Invalid=2024, Unknown=0, NotChecked=0, Total=2450 [2022-11-19 07:27:47,661 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 26 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:47,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 60 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:27:47,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-19 07:27:47,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-11-19 07:27:47,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:47,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-11-19 07:27:47,670 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 40 [2022-11-19 07:27:47,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:47,670 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-11-19 07:27:47,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:47,670 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-11-19 07:27:47,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-19 07:27:47,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:47,671 INFO L195 NwaCegarLoop]: trace histogram [13, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:47,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:47,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:47,877 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:47,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:47,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1008499743, now seen corresponding path program 1 times [2022-11-19 07:27:47,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:47,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965211688] [2022-11-19 07:27:47,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:47,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:47,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:48,284 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-19 07:27:48,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:48,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965211688] [2022-11-19 07:27:48,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965211688] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:48,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446544632] [2022-11-19 07:27:48,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:48,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:48,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:48,287 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:48,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:27:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:48,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:27:48,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:48,499 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-19 07:27:48,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:48,804 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-19 07:27:48,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446544632] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:27:48,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1266604082] [2022-11-19 07:27:48,809 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-19 07:27:48,810 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:27:48,810 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:27:48,810 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:27:48,810 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:27:48,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:48,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:48,858 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 07:27:48,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 07:27:48,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:48,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:48,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-19 07:27:48,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:48,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:48,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 07:27:48,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:48,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:48,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:48,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:48,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:49,051 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 07:27:49,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 284 treesize of output 274 [2022-11-19 07:27:49,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:49,300 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:27:49,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:27:49,558 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:27:50,407 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2133#(and (= |ULTIMATE.start_main_~c~0#1| 0) (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:27:50,407 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:27:50,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:27:50,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 30 [2022-11-19 07:27:50,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312610488] [2022-11-19 07:27:50,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:27:50,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-19 07:27:50,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:50,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-19 07:27:50,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=518, Invalid=1042, Unknown=0, NotChecked=0, Total=1560 [2022-11-19 07:27:50,409 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:50,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:50,515 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2022-11-19 07:27:50,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-19 07:27:50,516 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 30 states have internal predecessors, (42), 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 44 [2022-11-19 07:27:50,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:50,517 INFO L225 Difference]: With dead ends: 90 [2022-11-19 07:27:50,517 INFO L226 Difference]: Without dead ends: 60 [2022-11-19 07:27:50,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=518, Invalid=1042, Unknown=0, NotChecked=0, Total=1560 [2022-11-19 07:27:50,518 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:50,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 64 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:27:50,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-19 07:27:50,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-11-19 07:27:50,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:50,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-11-19 07:27:50,529 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 44 [2022-11-19 07:27:50,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:50,530 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-11-19 07:27:50,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:50,530 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-11-19 07:27:50,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-19 07:27:50,531 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:50,532 INFO L195 NwaCegarLoop]: trace histogram [28, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:50,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:50,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 07:27:50,738 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:50,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:50,738 INFO L85 PathProgramCache]: Analyzing trace with hash 409208169, now seen corresponding path program 2 times [2022-11-19 07:27:50,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:50,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141625286] [2022-11-19 07:27:50,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:50,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:50,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-19 07:27:51,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:51,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141625286] [2022-11-19 07:27:51,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141625286] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:51,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519592503] [2022-11-19 07:27:51,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:27:51,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:51,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:51,871 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:51,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:27:52,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 07:27:52,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:27:52,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-19 07:27:52,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:52,298 INFO L321 Elim1Store]: treesize reduction 34, result has 35.8 percent of original size [2022-11-19 07:27:52,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 82 [2022-11-19 07:27:52,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-19 07:27:52,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2022-11-19 07:27:52,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 25 [2022-11-19 07:27:52,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2022-11-19 07:27:53,463 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 28 proven. 38 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-11-19 07:27:53,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:27:53,803 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2022-11-19 07:27:53,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519592503] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:27:53,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1393373807] [2022-11-19 07:27:53,806 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-19 07:27:53,807 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:27:53,807 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:27:53,807 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:27:53,807 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:27:53,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:53,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:53,858 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-19 07:27:53,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-19 07:27:53,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:53,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:53,911 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 07:27:53,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 07:27:53,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:53,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:53,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 07:27:54,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:54,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:27:54,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:54,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:54,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:54,092 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 07:27:54,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 284 treesize of output 274 [2022-11-19 07:27:54,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:27:54,312 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:27:54,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:27:54,521 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:27:55,892 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2787#(and (= |ULTIMATE.start_main_~c~0#1| 0) (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:27:55,893 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:27:55,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:27:55,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 10, 9] total 47 [2022-11-19 07:27:55,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181786429] [2022-11-19 07:27:55,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:27:55,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-19 07:27:55,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:27:55,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-19 07:27:55,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=598, Invalid=2471, Unknown=11, NotChecked=0, Total=3080 [2022-11-19 07:27:55,896 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 47 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 47 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:57,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:27:57,812 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2022-11-19 07:27:57,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-19 07:27:57,813 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 47 states have internal predecessors, (75), 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 59 [2022-11-19 07:27:57,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:27:57,814 INFO L225 Difference]: With dead ends: 96 [2022-11-19 07:27:57,814 INFO L226 Difference]: Without dead ends: 66 [2022-11-19 07:27:57,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1548 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1526, Invalid=5574, Unknown=40, NotChecked=0, Total=7140 [2022-11-19 07:27:57,816 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 17 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:27:57,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 87 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 26 Unchecked, 0.0s Time] [2022-11-19 07:27:57,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-19 07:27:57,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-11-19 07:27:57,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:57,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2022-11-19 07:27:57,836 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 59 [2022-11-19 07:27:57,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:27:57,836 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2022-11-19 07:27:57,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 47 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:27:57,837 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2022-11-19 07:27:57,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-19 07:27:57,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:27:57,838 INFO L195 NwaCegarLoop]: trace histogram [29, 10, 10, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:27:57,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:27:58,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 07:27:58,044 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:27:58,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:27:58,045 INFO L85 PathProgramCache]: Analyzing trace with hash -899601470, now seen corresponding path program 3 times [2022-11-19 07:27:58,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:27:58,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271098492] [2022-11-19 07:27:58,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:27:58,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:27:58,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:27:59,236 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-19 07:27:59,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:27:59,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271098492] [2022-11-19 07:27:59,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271098492] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:27:59,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300643238] [2022-11-19 07:27:59,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:27:59,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:27:59,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:27:59,238 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:27:59,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:27:59,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:27:59,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:27:59,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:27:59,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:27:59,743 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-11-19 07:27:59,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:28:00,106 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-11-19 07:28:00,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300643238] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:28:00,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1833394825] [2022-11-19 07:28:00,109 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-19 07:28:00,109 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:28:00,110 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:28:00,110 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:28:00,110 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:28:00,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:00,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:00,161 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 07:28:00,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 07:28:00,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:00,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:00,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-19 07:28:00,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:00,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:00,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 07:28:00,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:00,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:00,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:00,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:00,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:28:00,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:28:00,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:00,303 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 07:28:00,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 304 treesize of output 272 [2022-11-19 07:28:00,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:28:00,377 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:28:00,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:28:00,588 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:28:02,120 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3545#(and (= |ULTIMATE.start_main_~c~0#1| 0) (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:28:02,120 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:28:02,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:28:02,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 13, 13] total 54 [2022-11-19 07:28:02,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359573410] [2022-11-19 07:28:02,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:28:02,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-19 07:28:02,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:28:02,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-19 07:28:02,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=814, Invalid=2968, Unknown=0, NotChecked=0, Total=3782 [2022-11-19 07:28:02,124 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 54 states, 54 states have (on average 1.6111111111111112) internal successors, (87), 54 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:28:02,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:28:02,294 INFO L93 Difference]: Finished difference Result 122 states and 138 transitions. [2022-11-19 07:28:02,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-19 07:28:02,295 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.6111111111111112) internal successors, (87), 54 states have internal predecessors, (87), 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 63 [2022-11-19 07:28:02,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:28:02,295 INFO L225 Difference]: With dead ends: 122 [2022-11-19 07:28:02,296 INFO L226 Difference]: Without dead ends: 89 [2022-11-19 07:28:02,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 148 SyntacticMatches, 10 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1724 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=814, Invalid=2968, Unknown=0, NotChecked=0, Total=3782 [2022-11-19 07:28:02,301 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 33 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:28:02,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 66 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:28:02,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-19 07:28:02,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-11-19 07:28:02,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 88 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:28:02,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2022-11-19 07:28:02,343 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 63 [2022-11-19 07:28:02,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:28:02,344 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2022-11-19 07:28:02,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.6111111111111112) internal successors, (87), 54 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:28:02,345 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2022-11-19 07:28:02,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-19 07:28:02,353 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:28:02,353 INFO L195 NwaCegarLoop]: trace histogram [30, 22, 22, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:28:02,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:28:02,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:28:02,560 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:28:02,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:28:02,560 INFO L85 PathProgramCache]: Analyzing trace with hash -276979850, now seen corresponding path program 4 times [2022-11-19 07:28:02,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:28:02,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946129773] [2022-11-19 07:28:02,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:02,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:28:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:03,778 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2022-11-19 07:28:03,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:28:03,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946129773] [2022-11-19 07:28:03,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946129773] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:28:03,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509322152] [2022-11-19 07:28:03,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:28:03,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:28:03,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:28:03,783 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:28:03,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:28:04,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:04,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-19 07:28:04,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:28:04,186 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2022-11-19 07:28:04,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:28:05,512 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2022-11-19 07:28:05,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509322152] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:28:05,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [661090139] [2022-11-19 07:28:05,514 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-19 07:28:05,515 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:28:05,515 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:28:05,515 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:28:05,515 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:28:05,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:05,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:05,559 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-19 07:28:05,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-19 07:28:05,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:05,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:05,618 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 07:28:05,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 07:28:05,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:05,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:05,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 07:28:05,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:05,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:05,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:05,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:05,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:28:05,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:28:05,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:05,740 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 07:28:05,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 304 treesize of output 272 [2022-11-19 07:28:05,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:28:05,804 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:28:05,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:28:06,062 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:28:08,473 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4482#(and (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= 0 |ULTIMATE.start_main_~c~0#1|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (<= |ULTIMATE.start_main_~c~0#1| 0) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:28:08,473 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:28:08,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:28:08,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 64 [2022-11-19 07:28:08,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449472146] [2022-11-19 07:28:08,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:28:08,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-19 07:28:08,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:28:08,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-19 07:28:08,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2123, Invalid=3133, Unknown=0, NotChecked=0, Total=5256 [2022-11-19 07:28:08,477 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 65 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 64 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:28:08,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:28:08,623 INFO L93 Difference]: Finished difference Result 178 states and 213 transitions. [2022-11-19 07:28:08,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-19 07:28:08,623 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 64 states have internal predecessors, (76), 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 88 [2022-11-19 07:28:08,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:28:08,624 INFO L225 Difference]: With dead ends: 178 [2022-11-19 07:28:08,624 INFO L226 Difference]: Without dead ends: 121 [2022-11-19 07:28:08,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 201 SyntacticMatches, 22 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2916 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2123, Invalid=3133, Unknown=0, NotChecked=0, Total=5256 [2022-11-19 07:28:08,627 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:28:08,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:28:08,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-19 07:28:08,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-11-19 07:28:08,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.025) internal successors, (123), 120 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:28:08,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2022-11-19 07:28:08,657 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 88 [2022-11-19 07:28:08,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:28:08,658 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2022-11-19 07:28:08,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 64 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:28:08,658 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2022-11-19 07:28:08,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-19 07:28:08,659 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:28:08,659 INFO L195 NwaCegarLoop]: trace histogram [62, 22, 22, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:28:08,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-19 07:28:08,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 07:28:08,866 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:28:08,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:28:08,866 INFO L85 PathProgramCache]: Analyzing trace with hash -2051494026, now seen corresponding path program 5 times [2022-11-19 07:28:08,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:28:08,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314111539] [2022-11-19 07:28:08,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:08,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:28:08,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:12,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2444 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2022-11-19 07:28:12,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:28:12,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314111539] [2022-11-19 07:28:12,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314111539] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:28:12,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940430296] [2022-11-19 07:28:12,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:28:12,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:28:12,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:28:12,587 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:28:12,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:28:13,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-19 07:28:13,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:28:13,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-19 07:28:13,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:28:14,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2444 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 2314 trivial. 0 not checked. [2022-11-19 07:28:14,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:28:15,381 INFO L321 Elim1Store]: treesize reduction 15, result has 83.5 percent of original size [2022-11-19 07:28:15,382 INFO L350 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 83 [2022-11-19 07:28:16,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2444 backedges. 19 proven. 111 refuted. 0 times theorem prover too weak. 2314 trivial. 0 not checked. [2022-11-19 07:28:16,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940430296] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:28:16,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1126656784] [2022-11-19 07:28:16,088 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-19 07:28:16,089 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:28:16,089 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:28:16,089 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:28:16,089 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:28:16,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:16,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:16,131 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-19 07:28:16,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-19 07:28:16,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:16,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:16,183 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 07:28:16,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 07:28:16,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:16,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:16,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 07:28:16,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:16,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:16,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:16,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:16,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:28:16,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:28:16,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:16,325 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 07:28:16,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 304 treesize of output 272 [2022-11-19 07:28:16,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:28:16,400 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:28:16,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:28:16,641 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:28:18,291 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5796#(and (= |ULTIMATE.start_main_~c~0#1| 0) (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:28:18,292 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:28:18,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:28:18,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 12, 12] total 86 [2022-11-19 07:28:18,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74649673] [2022-11-19 07:28:18,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:28:18,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-11-19 07:28:18,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:28:18,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-11-19 07:28:18,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2225, Invalid=6705, Unknown=0, NotChecked=0, Total=8930 [2022-11-19 07:28:18,296 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand has 86 states, 86 states have (on average 1.372093023255814) internal successors, (118), 86 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:28:21,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:28:21,972 INFO L93 Difference]: Finished difference Result 184 states and 189 transitions. [2022-11-19 07:28:21,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-11-19 07:28:21,973 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.372093023255814) internal successors, (118), 86 states have internal predecessors, (118), 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 120 [2022-11-19 07:28:21,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:28:21,974 INFO L225 Difference]: With dead ends: 184 [2022-11-19 07:28:21,974 INFO L226 Difference]: Without dead ends: 127 [2022-11-19 07:28:21,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5472 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=6465, Invalid=20925, Unknown=0, NotChecked=0, Total=27390 [2022-11-19 07:28:21,981 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 66 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:28:21,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 72 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:28:21,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-19 07:28:22,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2022-11-19 07:28:22,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0241935483870968) internal successors, (127), 124 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:28:22,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2022-11-19 07:28:22,012 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 120 [2022-11-19 07:28:22,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:28:22,012 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2022-11-19 07:28:22,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.372093023255814) internal successors, (118), 86 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:28:22,013 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2022-11-19 07:28:22,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-19 07:28:22,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:28:22,014 INFO L195 NwaCegarLoop]: trace histogram [63, 22, 22, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:28:22,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-19 07:28:22,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 07:28:22,222 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:28:22,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:28:22,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1866749307, now seen corresponding path program 6 times [2022-11-19 07:28:22,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:28:22,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443278397] [2022-11-19 07:28:22,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:22,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:28:22,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:25,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2515 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2022-11-19 07:28:25,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:28:25,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443278397] [2022-11-19 07:28:25,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443278397] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:28:25,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209069395] [2022-11-19 07:28:25,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:28:25,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:28:25,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:28:25,903 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:28:25,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:28:26,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:28:26,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:28:26,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 1394 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:28:26,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:28:27,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2515 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2031 trivial. 0 not checked. [2022-11-19 07:28:27,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:28:28,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2515 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2031 trivial. 0 not checked. [2022-11-19 07:28:28,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209069395] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:28:28,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [654047400] [2022-11-19 07:28:28,555 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-19 07:28:28,555 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:28:28,555 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:28:28,556 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:28:28,556 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:28:28,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:28,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:28,603 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 07:28:28,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 07:28:28,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:28,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:28,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-19 07:28:28,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:28,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:28,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 07:28:28,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:28,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:28,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:28:28,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:28:28,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:28:28,772 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 07:28:28,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 284 treesize of output 274 [2022-11-19 07:28:28,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:28:28,988 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:28:28,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:28:29,198 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:28:30,791 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7318#(and (= |ULTIMATE.start_main_~c~0#1| 0) (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:28:30,791 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:28:30,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:28:30,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 25, 25] total 112 [2022-11-19 07:28:30,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874253761] [2022-11-19 07:28:30,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:28:30,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-11-19 07:28:30,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:28:30,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-11-19 07:28:30,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3325, Invalid=11195, Unknown=0, NotChecked=0, Total=14520 [2022-11-19 07:28:30,796 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand has 112 states, 112 states have (on average 1.5089285714285714) internal successors, (169), 112 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:28:31,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:28:31,089 INFO L93 Difference]: Finished difference Result 234 states and 262 transitions. [2022-11-19 07:28:31,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-11-19 07:28:31,090 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.5089285714285714) internal successors, (169), 112 states have internal predecessors, (169), 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 124 [2022-11-19 07:28:31,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:28:31,091 INFO L225 Difference]: With dead ends: 234 [2022-11-19 07:28:31,091 INFO L226 Difference]: Without dead ends: 174 [2022-11-19 07:28:31,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4084 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=3325, Invalid=11195, Unknown=0, NotChecked=0, Total=14520 [2022-11-19 07:28:31,094 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 46 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:28:31,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 60 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:28:31,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-19 07:28:31,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-11-19 07:28:31,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.0173410404624277) internal successors, (176), 173 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:28:31,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 176 transitions. [2022-11-19 07:28:31,125 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 176 transitions. Word has length 124 [2022-11-19 07:28:31,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:28:31,125 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 176 transitions. [2022-11-19 07:28:31,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.5089285714285714) internal successors, (169), 112 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:28:31,126 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 176 transitions. [2022-11-19 07:28:31,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-19 07:28:31,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:28:31,128 INFO L195 NwaCegarLoop]: trace histogram [64, 46, 46, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:28:31,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 07:28:31,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:28:31,336 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:28:31,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:28:31,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1803810411, now seen corresponding path program 7 times [2022-11-19 07:28:31,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:28:31,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128325077] [2022-11-19 07:28:31,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:31,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:28:31,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:35,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4211 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 2131 trivial. 0 not checked. [2022-11-19 07:28:35,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:28:35,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128325077] [2022-11-19 07:28:35,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128325077] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:28:35,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552378499] [2022-11-19 07:28:35,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:28:35,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:28:35,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:28:35,200 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:28:35,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 07:28:35,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:35,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 1627 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-19 07:28:35,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:28:35,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4211 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 2131 trivial. 0 not checked. [2022-11-19 07:28:35,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:28:40,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4211 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 2131 trivial. 0 not checked. [2022-11-19 07:28:40,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552378499] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:28:40,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [846931824] [2022-11-19 07:28:40,967 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-19 07:28:40,967 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:28:40,968 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:28:40,968 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:28:40,968 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:28:40,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:40,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:41,009 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-19 07:28:41,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-19 07:28:41,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:41,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:41,070 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 07:28:41,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 07:28:41,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:41,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:41,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 07:28:41,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:41,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:41,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:41,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:41,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:28:41,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:28:41,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:28:41,218 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 07:28:41,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 304 treesize of output 272 [2022-11-19 07:28:41,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:28:41,298 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:28:41,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:28:41,581 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:28:47,046 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9162#(and (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= 0 |ULTIMATE.start_main_~c~0#1|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (<= |ULTIMATE.start_main_~c~0#1| 0) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:28:47,047 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:28:47,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:28:47,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 132 [2022-11-19 07:28:47,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603188596] [2022-11-19 07:28:47,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:28:47,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-11-19 07:28:47,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:28:47,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-11-19 07:28:47,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8821, Invalid=10919, Unknown=0, NotChecked=0, Total=19740 [2022-11-19 07:28:47,052 INFO L87 Difference]: Start difference. First operand 174 states and 176 transitions. Second operand has 133 states, 133 states have (on average 1.0827067669172932) internal successors, (144), 132 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:28:47,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:28:47,391 INFO L93 Difference]: Finished difference Result 348 states and 417 transitions. [2022-11-19 07:28:47,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-11-19 07:28:47,392 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 1.0827067669172932) internal successors, (144), 132 states have internal predecessors, (144), 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 173 [2022-11-19 07:28:47,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:28:47,393 INFO L225 Difference]: With dead ends: 348 [2022-11-19 07:28:47,393 INFO L226 Difference]: Without dead ends: 240 [2022-11-19 07:28:47,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 398 SyntacticMatches, 46 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10792 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=8821, Invalid=10919, Unknown=0, NotChecked=0, Total=19740 [2022-11-19 07:28:47,395 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:28:47,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 64 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:28:47,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-19 07:28:47,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-11-19 07:28:47,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.0125523012552302) internal successors, (242), 239 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:28:47,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 242 transitions. [2022-11-19 07:28:47,451 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 242 transitions. Word has length 173 [2022-11-19 07:28:47,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:28:47,452 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 242 transitions. [2022-11-19 07:28:47,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 1.0827067669172932) internal successors, (144), 132 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:28:47,452 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 242 transitions. [2022-11-19 07:28:47,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-11-19 07:28:47,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:28:47,455 INFO L195 NwaCegarLoop]: trace histogram [130, 46, 46, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:28:47,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 07:28:47,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 07:28:47,664 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:28:47,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:28:47,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1650919275, now seen corresponding path program 8 times [2022-11-19 07:28:47,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:28:47,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795315131] [2022-11-19 07:28:47,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:47,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:28:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:00,209 INFO L134 CoverageAnalysis]: Checked inductivity of 10646 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 2131 trivial. 0 not checked. [2022-11-19 07:29:00,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:00,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795315131] [2022-11-19 07:29:00,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795315131] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:00,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850344866] [2022-11-19 07:29:00,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:29:00,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:00,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:00,211 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:00,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 07:29:03,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-19 07:29:03,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:29:03,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-19 07:29:03,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 10646 backedges. 0 proven. 367 refuted. 0 times theorem prover too weak. 10279 trivial. 0 not checked. [2022-11-19 07:29:05,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:06,561 INFO L321 Elim1Store]: treesize reduction 15, result has 83.5 percent of original size [2022-11-19 07:29:06,561 INFO L350 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 83 [2022-11-19 07:29:07,770 INFO L134 CoverageAnalysis]: Checked inductivity of 10646 backedges. 42 proven. 325 refuted. 0 times theorem prover too weak. 10279 trivial. 0 not checked. [2022-11-19 07:29:07,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850344866] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:29:07,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [533525413] [2022-11-19 07:29:07,772 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-19 07:29:07,772 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:29:07,773 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:29:07,773 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:29:07,773 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:29:07,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:07,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:07,811 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-19 07:29:07,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-19 07:29:07,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:07,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:07,856 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 07:29:07,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 07:29:07,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:07,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:07,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 07:29:07,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:07,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:07,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:07,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:07,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:07,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:07,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:07,971 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 07:29:07,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 304 treesize of output 272 [2022-11-19 07:29:08,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:08,033 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:29:08,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:29:08,219 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:29:19,384 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11762#(and (= |ULTIMATE.start_main_~c~0#1| 0) (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:29:19,384 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:29:19,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:29:19,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 14, 14] total 158 [2022-11-19 07:29:19,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362045848] [2022-11-19 07:29:19,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:29:19,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2022-11-19 07:29:19,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:19,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2022-11-19 07:29:19,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8927, Invalid=18463, Unknown=0, NotChecked=0, Total=27390 [2022-11-19 07:29:19,389 INFO L87 Difference]: Start difference. First operand 240 states and 242 transitions. Second operand has 158 states, 158 states have (on average 1.240506329113924) internal successors, (196), 158 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:31,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:31,188 INFO L93 Difference]: Finished difference Result 354 states and 359 transitions. [2022-11-19 07:29:31,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-11-19 07:29:31,188 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 1.240506329113924) internal successors, (196), 158 states have internal predecessors, (196), 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 239 [2022-11-19 07:29:31,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:31,190 INFO L225 Difference]: With dead ends: 354 [2022-11-19 07:29:31,190 INFO L226 Difference]: Without dead ends: 246 [2022-11-19 07:29:31,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 987 GetRequests, 637 SyntacticMatches, 46 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22836 ImplicationChecksByTransitivity, 31.5s TimeCoverageRelationStatistics Valid=26573, Invalid=66757, Unknown=0, NotChecked=0, Total=93330 [2022-11-19 07:29:31,196 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 49 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:31,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 102 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:29:31,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-11-19 07:29:31,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 244. [2022-11-19 07:29:31,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.0123456790123457) internal successors, (246), 243 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:31,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 246 transitions. [2022-11-19 07:29:31,238 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 246 transitions. Word has length 239 [2022-11-19 07:29:31,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:31,239 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 246 transitions. [2022-11-19 07:29:31,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 1.240506329113924) internal successors, (196), 158 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:31,239 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 246 transitions. [2022-11-19 07:29:31,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-19 07:29:31,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:31,242 INFO L195 NwaCegarLoop]: trace histogram [131, 46, 46, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:31,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:31,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 07:29:31,452 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:31,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:31,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1401019114, now seen corresponding path program 9 times [2022-11-19 07:29:31,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:31,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544560158] [2022-11-19 07:29:31,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:31,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:29:44,055 INFO L134 CoverageAnalysis]: Checked inductivity of 10788 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 2142 trivial. 0 not checked. [2022-11-19 07:29:44,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:29:44,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544560158] [2022-11-19 07:29:44,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544560158] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:29:44,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483092034] [2022-11-19 07:29:44,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:29:44,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:44,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:44,057 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:44,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 07:29:44,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:29:44,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:29:44,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 2778 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-19 07:29:44,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:48,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10788 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 8672 trivial. 0 not checked. [2022-11-19 07:29:48,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:53,836 INFO L134 CoverageAnalysis]: Checked inductivity of 10788 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 8672 trivial. 0 not checked. [2022-11-19 07:29:53,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483092034] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:29:53,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1458495470] [2022-11-19 07:29:53,842 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-19 07:29:53,842 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:29:53,843 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:29:53,843 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:29:53,843 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:29:53,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:53,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:53,894 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 07:29:53,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 07:29:53,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:53,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:53,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-19 07:29:53,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:53,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:53,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 07:29:53,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:53,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:53,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:53,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:53,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:53,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:53,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:29:54,021 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 07:29:54,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 304 treesize of output 272 [2022-11-19 07:29:54,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:29:54,082 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:29:54,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:29:54,287 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:29:56,827 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14751#(and (= |ULTIMATE.start_main_~c~0#1| 0) (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:29:56,827 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:29:56,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:29:56,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 49, 49] total 228 [2022-11-19 07:29:56,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244972843] [2022-11-19 07:29:56,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:29:56,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 228 states [2022-11-19 07:29:56,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:29:56,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 228 interpolants. [2022-11-19 07:29:56,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13523, Invalid=42409, Unknown=0, NotChecked=0, Total=55932 [2022-11-19 07:29:56,835 INFO L87 Difference]: Start difference. First operand 244 states and 246 transitions. Second operand has 228 states, 228 states have (on average 1.4605263157894737) internal successors, (333), 228 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:57,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:29:57,567 INFO L93 Difference]: Finished difference Result 452 states and 504 transitions. [2022-11-19 07:29:57,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 228 states. [2022-11-19 07:29:57,568 INFO L78 Accepts]: Start accepts. Automaton has has 228 states, 228 states have (on average 1.4605263157894737) internal successors, (333), 228 states have internal predecessors, (333), 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 243 [2022-11-19 07:29:57,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:29:57,570 INFO L225 Difference]: With dead ends: 452 [2022-11-19 07:29:57,570 INFO L226 Difference]: Without dead ends: 341 [2022-11-19 07:29:57,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 860 GetRequests, 625 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14760 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=13523, Invalid=42409, Unknown=0, NotChecked=0, Total=55932 [2022-11-19 07:29:57,575 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 94 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:29:57,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 78 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:29:57,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-11-19 07:29:57,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 341. [2022-11-19 07:29:57,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.0088235294117647) internal successors, (343), 340 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:57,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 343 transitions. [2022-11-19 07:29:57,620 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 343 transitions. Word has length 243 [2022-11-19 07:29:57,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:29:57,621 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 343 transitions. [2022-11-19 07:29:57,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 228 states, 228 states have (on average 1.4605263157894737) internal successors, (333), 228 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:29:57,621 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 343 transitions. [2022-11-19 07:29:57,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2022-11-19 07:29:57,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:29:57,627 INFO L195 NwaCegarLoop]: trace histogram [132, 94, 94, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:29:57,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-19 07:29:57,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 07:29:57,837 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:29:57,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:29:57,838 INFO L85 PathProgramCache]: Analyzing trace with hash -2018186114, now seen corresponding path program 10 times [2022-11-19 07:29:57,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:29:57,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696696637] [2022-11-19 07:29:57,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:29:57,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:29:58,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:11,840 INFO L134 CoverageAnalysis]: Checked inductivity of 17640 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 8862 trivial. 0 not checked. [2022-11-19 07:30:11,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:30:11,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696696637] [2022-11-19 07:30:11,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696696637] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:30:11,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761864004] [2022-11-19 07:30:11,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:30:11,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:30:11,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:30:11,842 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:30:11,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 07:30:12,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:30:12,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 3227 conjuncts, 134 conjunts are in the unsatisfiable core [2022-11-19 07:30:12,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:30:13,229 INFO L134 CoverageAnalysis]: Checked inductivity of 17640 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 8862 trivial. 0 not checked. [2022-11-19 07:30:13,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:30:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 17640 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 8862 trivial. 0 not checked. [2022-11-19 07:30:34,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761864004] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:30:34,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [372120837] [2022-11-19 07:30:34,232 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-19 07:30:34,233 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:30:34,233 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:30:34,233 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:30:34,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:30:34,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:34,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:34,275 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-19 07:30:34,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-19 07:30:34,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:34,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:34,322 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 07:30:34,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 07:30:34,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:34,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:34,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 07:30:34,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:34,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:34,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:34,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:34,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:34,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:34,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:30:34,449 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 07:30:34,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 304 treesize of output 272 [2022-11-19 07:30:34,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:30:34,519 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:30:34,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:30:34,704 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:30:36,865 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18377#(and (= |ULTIMATE.start_main_~c~0#1| 0) (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:30:36,865 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:30:36,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:30:36,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 134, 134] total 268 [2022-11-19 07:30:36,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906478475] [2022-11-19 07:30:36,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:30:36,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 269 states [2022-11-19 07:30:36,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:30:36,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 269 interpolants. [2022-11-19 07:30:36,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36099, Invalid=40907, Unknown=0, NotChecked=0, Total=77006 [2022-11-19 07:30:36,873 INFO L87 Difference]: Start difference. First operand 341 states and 343 transitions. Second operand has 269 states, 269 states have (on average 1.0408921933085502) internal successors, (280), 268 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:30:37,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:30:37,980 INFO L93 Difference]: Finished difference Result 682 states and 819 transitions. [2022-11-19 07:30:37,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 268 states. [2022-11-19 07:30:37,981 INFO L78 Accepts]: Start accepts. Automaton has has 269 states, 269 states have (on average 1.0408921933085502) internal successors, (280), 268 states have internal predecessors, (280), 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 340 [2022-11-19 07:30:37,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:30:37,983 INFO L225 Difference]: With dead ends: 682 [2022-11-19 07:30:37,983 INFO L226 Difference]: Without dead ends: 475 [2022-11-19 07:30:37,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1152 GetRequests, 876 SyntacticMatches, 0 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4135 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=36099, Invalid=40907, Unknown=0, NotChecked=0, Total=77006 [2022-11-19 07:30:37,986 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:30:37,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 72 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:30:37,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-11-19 07:30:38,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 475. [2022-11-19 07:30:38,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 1.0063291139240507) internal successors, (477), 474 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:30:38,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 477 transitions. [2022-11-19 07:30:38,077 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 477 transitions. Word has length 340 [2022-11-19 07:30:38,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:30:38,077 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 477 transitions. [2022-11-19 07:30:38,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 269 states, 269 states have (on average 1.0408921933085502) internal successors, (280), 268 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:30:38,078 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 477 transitions. [2022-11-19 07:30:38,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2022-11-19 07:30:38,081 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:30:38,081 INFO L195 NwaCegarLoop]: trace histogram [266, 94, 94, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:30:38,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-19 07:30:38,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:30:38,293 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:30:38,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:30:38,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1279434622, now seen corresponding path program 11 times [2022-11-19 07:30:38,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:30:38,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556308097] [2022-11-19 07:30:38,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:30:38,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:30:38,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:31:32,917 INFO L134 CoverageAnalysis]: Checked inductivity of 44373 backedges. 0 proven. 35511 refuted. 0 times theorem prover too weak. 8862 trivial. 0 not checked. [2022-11-19 07:31:32,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:31:32,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556308097] [2022-11-19 07:31:32,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556308097] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:31:32,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820583656] [2022-11-19 07:31:32,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:31:32,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:31:32,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:31:32,927 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:31:32,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 07:31:38,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-19 07:31:38,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:31:38,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-19 07:31:38,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:31:43,556 INFO L134 CoverageAnalysis]: Checked inductivity of 44373 backedges. 0 proven. 941 refuted. 0 times theorem prover too weak. 43432 trivial. 0 not checked. [2022-11-19 07:31:43,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:31:45,574 INFO L321 Elim1Store]: treesize reduction 15, result has 83.5 percent of original size [2022-11-19 07:31:45,575 INFO L350 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 83 [2022-11-19 07:31:47,670 INFO L134 CoverageAnalysis]: Checked inductivity of 44373 backedges. 89 proven. 852 refuted. 0 times theorem prover too weak. 43432 trivial. 0 not checked. [2022-11-19 07:31:47,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820583656] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:31:47,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [817263491] [2022-11-19 07:31:47,672 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-19 07:31:47,672 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:31:47,673 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:31:47,673 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:31:47,673 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:31:47,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:47,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:47,724 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 07:31:47,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 07:31:47,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:47,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:47,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-19 07:31:47,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:47,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:47,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 07:31:47,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:47,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:47,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:47,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:47,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:47,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:47,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:31:47,852 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 07:31:47,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 304 treesize of output 272 [2022-11-19 07:31:47,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:31:47,916 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:31:47,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:31:48,097 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:32:24,774 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23516#(and (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= 0 |ULTIMATE.start_main_~c~0#1|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (<= |ULTIMATE.start_main_~c~0#1| 0) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:32:24,774 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:32:24,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:32:24,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [268, 16, 16] total 298 [2022-11-19 07:32:24,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754953647] [2022-11-19 07:32:24,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:32:24,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 298 states [2022-11-19 07:32:24,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:32:24,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 298 interpolants. [2022-11-19 07:32:24,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36210, Invalid=57120, Unknown=0, NotChecked=0, Total=93330 [2022-11-19 07:32:24,789 INFO L87 Difference]: Start difference. First operand 475 states and 477 transitions. Second operand has 298 states, 298 states have (on average 1.1476510067114094) internal successors, (342), 298 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:33:06,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:33:06,723 INFO L93 Difference]: Finished difference Result 688 states and 693 transitions. [2022-11-19 07:33:06,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 292 states. [2022-11-19 07:33:06,724 INFO L78 Accepts]: Start accepts. Automaton has has 298 states, 298 states have (on average 1.1476510067114094) internal successors, (342), 298 states have internal predecessors, (342), 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 474 [2022-11-19 07:33:06,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:33:06,725 INFO L225 Difference]: With dead ends: 688 [2022-11-19 07:33:06,725 INFO L226 Difference]: Without dead ends: 481 [2022-11-19 07:33:06,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1967 GetRequests, 1290 SyntacticMatches, 94 SemanticMatches, 583 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79636 ImplicationChecksByTransitivity, 110.0s TimeCoverageRelationStatistics Valid=108426, Invalid=233214, Unknown=0, NotChecked=0, Total=341640 [2022-11-19 07:33:06,739 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 95 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:33:06,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 150 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 07:33:06,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-11-19 07:33:06,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 479. [2022-11-19 07:33:06,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 1.006276150627615) internal successors, (481), 478 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:33:06,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 481 transitions. [2022-11-19 07:33:06,831 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 481 transitions. Word has length 474 [2022-11-19 07:33:06,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:33:06,832 INFO L495 AbstractCegarLoop]: Abstraction has 479 states and 481 transitions. [2022-11-19 07:33:06,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 298 states, 298 states have (on average 1.1476510067114094) internal successors, (342), 298 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:33:06,833 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 481 transitions. [2022-11-19 07:33:06,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2022-11-19 07:33:06,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:33:06,836 INFO L195 NwaCegarLoop]: trace histogram [267, 94, 94, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:33:06,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-19 07:33:07,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:33:07,044 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:33:07,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:33:07,045 INFO L85 PathProgramCache]: Analyzing trace with hash -554107011, now seen corresponding path program 12 times [2022-11-19 07:33:07,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:33:07,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185620792] [2022-11-19 07:33:07,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:33:07,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:33:07,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:34:01,070 INFO L134 CoverageAnalysis]: Checked inductivity of 44654 backedges. 0 proven. 35778 refuted. 0 times theorem prover too weak. 8876 trivial. 0 not checked. [2022-11-19 07:34:01,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:34:01,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185620792] [2022-11-19 07:34:01,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185620792] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:34:01,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334355462] [2022-11-19 07:34:01,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:34:01,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:34:01,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:34:01,075 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:34:01,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-19 07:34:02,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:34:02,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:34:02,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 5534 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-19 07:34:02,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:34:17,133 INFO L134 CoverageAnalysis]: Checked inductivity of 44654 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 35818 trivial. 0 not checked. [2022-11-19 07:34:17,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:34:38,616 INFO L134 CoverageAnalysis]: Checked inductivity of 44654 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 35818 trivial. 0 not checked. [2022-11-19 07:34:38,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334355462] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:34:38,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1011213291] [2022-11-19 07:34:38,617 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-19 07:34:38,618 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:34:38,618 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:34:38,618 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:34:38,619 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:34:38,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:38,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:38,664 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 07:34:38,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 07:34:38,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:38,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:38,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-19 07:34:38,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:38,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:38,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 07:34:38,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:38,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:38,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:38,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:38,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:38,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:38,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:34:38,785 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 07:34:38,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 304 treesize of output 272 [2022-11-19 07:34:38,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:34:38,862 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:34:38,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:34:39,058 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:35:22,558 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29413#(and (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= 0 |ULTIMATE.start_main_~c~0#1|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (<= |ULTIMATE.start_main_~c~0#1| 0) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:35:22,558 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:35:22,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:35:22,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [269, 97, 97] total 460 [2022-11-19 07:35:22,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053913745] [2022-11-19 07:35:22,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:35:22,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 460 states [2022-11-19 07:35:22,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:35:22,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 460 interpolants. [2022-11-19 07:35:22,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54693, Invalid=163863, Unknown=0, NotChecked=0, Total=218556 [2022-11-19 07:35:22,575 INFO L87 Difference]: Start difference. First operand 479 states and 481 transitions. Second operand has 460 states, 460 states have (on average 1.4369565217391305) internal successors, (661), 460 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:35:25,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:35:25,401 INFO L93 Difference]: Finished difference Result 882 states and 982 transitions. [2022-11-19 07:35:25,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 460 states. [2022-11-19 07:35:25,402 INFO L78 Accepts]: Start accepts. Automaton has has 460 states, 460 states have (on average 1.4369565217391305) internal successors, (661), 460 states have internal predecessors, (661), 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 478 [2022-11-19 07:35:25,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:35:25,405 INFO L225 Difference]: With dead ends: 882 [2022-11-19 07:35:25,405 INFO L226 Difference]: Without dead ends: 672 [2022-11-19 07:35:25,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1701 GetRequests, 1141 SyntacticMatches, 94 SemanticMatches, 466 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106836 ImplicationChecksByTransitivity, 107.0s TimeCoverageRelationStatistics Valid=54693, Invalid=163863, Unknown=0, NotChecked=0, Total=218556 [2022-11-19 07:35:25,420 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 285 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:35:25,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 84 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 07:35:25,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-11-19 07:35:25,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 672. [2022-11-19 07:35:25,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 671 states have (on average 1.0044709388971684) internal successors, (674), 671 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:35:25,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 674 transitions. [2022-11-19 07:35:25,531 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 674 transitions. Word has length 478 [2022-11-19 07:35:25,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:35:25,532 INFO L495 AbstractCegarLoop]: Abstraction has 672 states and 674 transitions. [2022-11-19 07:35:25,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 460 states, 460 states have (on average 1.4369565217391305) internal successors, (661), 460 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:35:25,533 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 674 transitions. [2022-11-19 07:35:25,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 672 [2022-11-19 07:35:25,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:35:25,537 INFO L195 NwaCegarLoop]: trace histogram [268, 190, 190, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:35:25,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-19 07:35:25,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-19 07:35:25,737 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:35:25,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:35:25,738 INFO L85 PathProgramCache]: Analyzing trace with hash -271906779, now seen corresponding path program 13 times [2022-11-19 07:35:25,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:35:25,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915434679] [2022-11-19 07:35:25,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:35:25,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:35:26,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:24,870 INFO L134 CoverageAnalysis]: Checked inductivity of 72186 backedges. 0 proven. 36046 refuted. 0 times theorem prover too weak. 36140 trivial. 0 not checked. [2022-11-19 07:36:24,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:36:24,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915434679] [2022-11-19 07:36:24,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915434679] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:36:24,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456737202] [2022-11-19 07:36:24,871 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:36:24,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:36:24,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:36:24,872 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:36:24,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-19 07:36:26,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:36:26,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 6415 conjuncts, 270 conjunts are in the unsatisfiable core [2022-11-19 07:36:27,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:36:27,478 INFO L134 CoverageAnalysis]: Checked inductivity of 72186 backedges. 0 proven. 36046 refuted. 0 times theorem prover too weak. 36140 trivial. 0 not checked. [2022-11-19 07:36:27,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:37:53,085 INFO L134 CoverageAnalysis]: Checked inductivity of 72186 backedges. 0 proven. 36046 refuted. 0 times theorem prover too weak. 36140 trivial. 0 not checked. [2022-11-19 07:37:53,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456737202] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:37:53,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1855572538] [2022-11-19 07:37:53,087 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-19 07:37:53,087 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:37:53,088 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:37:53,088 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:37:53,088 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:37:53,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:53,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:53,129 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-19 07:37:53,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-19 07:37:53,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:53,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:53,174 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 07:37:53,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 07:37:53,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:53,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:53,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 07:37:53,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:53,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:37:53,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:37:53,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:37:53,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:37:53,338 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 07:37:53,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 284 treesize of output 274 [2022-11-19 07:37:53,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:37:53,556 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:37:53,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:37:53,728 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:38:54,285 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '36572#(and (= |ULTIMATE.start_main_~c~0#1| 0) (= |ULTIMATE.start__strcmp_#res#1| 0) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.base|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_~src#1.base|) (<= |ULTIMATE.start__strcmp_~src#1.offset| 0) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.offset|) (<= 0 |ULTIMATE.start__strcmp_~dst#1.offset|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (<= 0 |ULTIMATE.start__strcmp_#in~src#1.base|) (<= 0 |ULTIMATE.start__strcmp_~src#1.offset|) (<= |ULTIMATE.start__strcmp_#in~dst#1.offset| 0) (<= |ULTIMATE.start__strcmp_#in~src#1.offset| 0) (< |ULTIMATE.start_main_~x~0#1| 100000) (<= |ULTIMATE.start__strcmp_~dst#1.offset| 0) (= |ULTIMATE.start_main_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start__strcmp_#in~dst#1.base|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 100000 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (ite (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem8#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start__strcmp_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-19 07:38:54,285 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:38:54,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:38:54,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [270, 270, 270] total 540 [2022-11-19 07:38:54,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164904689] [2022-11-19 07:38:54,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:38:54,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 541 states [2022-11-19 07:38:54,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:38:54,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 541 interpolants. [2022-11-19 07:38:54,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146113, Invalid=154739, Unknown=0, NotChecked=0, Total=300852 [2022-11-19 07:38:54,323 INFO L87 Difference]: Start difference. First operand 672 states and 674 transitions. Second operand has 541 states, 541 states have (on average 1.0203327171903882) internal successors, (552), 540 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:38:59,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:38:59,616 INFO L93 Difference]: Finished difference Result 1344 states and 1617 transitions. [2022-11-19 07:38:59,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 540 states. [2022-11-19 07:38:59,619 INFO L78 Accepts]: Start accepts. Automaton has has 541 states, 541 states have (on average 1.0203327171903882) internal successors, (552), 540 states have internal predecessors, (552), 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 671 [2022-11-19 07:38:59,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:38:59,622 INFO L225 Difference]: With dead ends: 1344 [2022-11-19 07:38:59,622 INFO L226 Difference]: Without dead ends: 942 [2022-11-19 07:38:59,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2281 GetRequests, 1544 SyntacticMatches, 190 SemanticMatches, 547 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160864 ImplicationChecksByTransitivity, 173.8s TimeCoverageRelationStatistics Valid=146113, Invalid=154739, Unknown=0, NotChecked=0, Total=300852 [2022-11-19 07:38:59,636 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:38:59,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 72 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:38:59,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2022-11-19 07:38:59,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 942. [2022-11-19 07:38:59,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 941 states have (on average 1.0031880977683316) internal successors, (944), 941 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:38:59,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 944 transitions. [2022-11-19 07:38:59,784 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 944 transitions. Word has length 671 [2022-11-19 07:38:59,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:38:59,785 INFO L495 AbstractCegarLoop]: Abstraction has 942 states and 944 transitions. [2022-11-19 07:38:59,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 541 states, 541 states have (on average 1.0203327171903882) internal successors, (552), 540 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:38:59,786 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 944 transitions. [2022-11-19 07:38:59,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 942 [2022-11-19 07:38:59,792 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:38:59,792 INFO L195 NwaCegarLoop]: trace histogram [538, 190, 190, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:38:59,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-19 07:38:59,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db86a98b-b7ea-4fe5-add2-a33b609b97b6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-19 07:38:59,993 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:38:59,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:38:59,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1021513435, now seen corresponding path program 14 times [2022-11-19 07:38:59,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:38:59,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972289300] [2022-11-19 07:38:59,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:38:59,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:39:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat