./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 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_strcmp_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW --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-4e7fbc6 [2022-11-23 13:42:25,726 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 13:42:25,728 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 13:42:25,754 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 13:42:25,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 13:42:25,758 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 13:42:25,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 13:42:25,773 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 13:42:25,775 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 13:42:25,780 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 13:42:25,781 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 13:42:25,782 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 13:42:25,782 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 13:42:25,783 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 13:42:25,784 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 13:42:25,785 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 13:42:25,785 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 13:42:25,786 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 13:42:25,788 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 13:42:25,789 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 13:42:25,790 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 13:42:25,797 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 13:42:25,798 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 13:42:25,809 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 13:42:25,812 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 13:42:25,813 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 13:42:25,813 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 13:42:25,814 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 13:42:25,814 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 13:42:25,815 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 13:42:25,816 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 13:42:25,816 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 13:42:25,817 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 13:42:25,818 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 13:42:25,819 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 13:42:25,819 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 13:42:25,819 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 13:42:25,820 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 13:42:25,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 13:42:25,821 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 13:42:25,821 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 13:42:25,823 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 13:42:25,844 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 13:42:25,844 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 13:42:25,844 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 13:42:25,844 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 13:42:25,845 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 13:42:25,845 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 13:42:25,845 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 13:42:25,846 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 13:42:25,846 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 13:42:25,846 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 13:42:25,846 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 13:42:25,846 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 13:42:25,846 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 13:42:25,847 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 13:42:25,847 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 13:42:25,847 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 13:42:25,847 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 13:42:25,847 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 13:42:25,848 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 13:42:25,848 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 13:42:25,848 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 13:42:25,849 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 13:42:25,849 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 13:42:25,849 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 13:42:25,849 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 13:42:25,850 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 13:42:25,850 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 13:42:25,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 13:42:25,850 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 13:42:25,851 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 13:42:25,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 13:42:25,851 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 13:42:25,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:42:25,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 13:42:25,852 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 13:42:25,852 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 13:42:25,852 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 13:42:25,852 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 13:42:25,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 13:42:25,853 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 13:42:25,853 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 13:42:25,853 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_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c802cbda9e8bed6a313e86b45d5d1f15426dd1417288149156d2bae000d97c78 [2022-11-23 13:42:26,208 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 13:42:26,242 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 13:42:26,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 13:42:26,245 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 13:42:26,245 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 13:42:26,247 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/array-examples/standard_strcmp_ground.i [2022-11-23 13:42:29,276 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 13:42:29,497 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 13:42:29,498 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/sv-benchmarks/c/array-examples/standard_strcmp_ground.i [2022-11-23 13:42:29,504 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/data/acffdff26/ba492f9cc8114c9993056a9b877af420/FLAG3b0bf4db1 [2022-11-23 13:42:29,518 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/data/acffdff26/ba492f9cc8114c9993056a9b877af420 [2022-11-23 13:42:29,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 13:42:29,522 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 13:42:29,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 13:42:29,524 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 13:42:29,527 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 13:42:29,528 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:42:29" (1/1) ... [2022-11-23 13:42:29,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55a8eb4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:42:29, skipping insertion in model container [2022-11-23 13:42:29,529 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:42:29" (1/1) ... [2022-11-23 13:42:29,537 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 13:42:29,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 13:42:29,744 WARN L237 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_f45b2c08-a2fa-40c1-90b5-2451f3de791d/sv-benchmarks/c/array-examples/standard_strcmp_ground.i[815,828] [2022-11-23 13:42:29,760 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:42:29,766 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 13:42:29,778 WARN L237 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_f45b2c08-a2fa-40c1-90b5-2451f3de791d/sv-benchmarks/c/array-examples/standard_strcmp_ground.i[815,828] [2022-11-23 13:42:29,785 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 13:42:29,798 INFO L208 MainTranslator]: Completed translation [2022-11-23 13:42:29,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:42:29 WrapperNode [2022-11-23 13:42:29,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 13:42:29,800 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 13:42:29,800 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 13:42:29,800 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 13:42:29,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:42:29" (1/1) ... [2022-11-23 13:42:29,814 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:42:29" (1/1) ... [2022-11-23 13:42:29,832 INFO L138 Inliner]: procedures = 17, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2022-11-23 13:42:29,833 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 13:42:29,833 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 13:42:29,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 13:42:29,834 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 13:42:29,842 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:42:29" (1/1) ... [2022-11-23 13:42:29,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:42:29" (1/1) ... [2022-11-23 13:42:29,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:42:29" (1/1) ... [2022-11-23 13:42:29,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:42:29" (1/1) ... [2022-11-23 13:42:29,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:42:29" (1/1) ... [2022-11-23 13:42:29,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:42:29" (1/1) ... [2022-11-23 13:42:29,853 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:42:29" (1/1) ... [2022-11-23 13:42:29,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:42:29" (1/1) ... [2022-11-23 13:42:29,856 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 13:42:29,857 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 13:42:29,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 13:42:29,857 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 13:42:29,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:42:29" (1/1) ... [2022-11-23 13:42:29,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 13:42:29,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:42:29,897 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 13:42:29,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 13:42:29,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 13:42:29,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 13:42:29,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 13:42:29,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 13:42:29,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 13:42:29,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 13:42:29,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 13:42:29,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 13:42:30,013 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 13:42:30,016 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 13:42:30,182 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 13:42:30,213 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 13:42:30,213 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-23 13:42:30,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:42:30 BoogieIcfgContainer [2022-11-23 13:42:30,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 13:42:30,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 13:42:30,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 13:42:30,222 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 13:42:30,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:42:29" (1/3) ... [2022-11-23 13:42:30,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7323dfd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:42:30, skipping insertion in model container [2022-11-23 13:42:30,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:42:29" (2/3) ... [2022-11-23 13:42:30,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7323dfd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:42:30, skipping insertion in model container [2022-11-23 13:42:30,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:42:30" (3/3) ... [2022-11-23 13:42:30,225 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_strcmp_ground.i [2022-11-23 13:42:30,244 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 13:42:30,244 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 13:42:30,303 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 13:42:30,313 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;@3264d6ef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 13:42:30,313 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 13:42:30,318 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) [2022-11-23 13:42:30,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 13:42:30,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:42:30,325 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:42:30,327 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:42:30,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:42:30,334 INFO L85 PathProgramCache]: Analyzing trace with hash -715237656, now seen corresponding path program 1 times [2022-11-23 13:42:30,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:42:30,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135204589] [2022-11-23 13:42:30,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:42:30,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:42:30,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:42:30,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:42:30,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:42:30,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135204589] [2022-11-23 13:42:30,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135204589] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:42:30,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:42:30,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 13:42:30,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916116795] [2022-11-23 13:42:30,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:42:30,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:42:30,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:42:30,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:42:30,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 13:42:30,697 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) [2022-11-23 13:42:30,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:42:30,762 INFO L93 Difference]: Finished difference Result 25 states and 35 transitions. [2022-11-23 13:42:30,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:42:30,764 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 [2022-11-23 13:42:30,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:42:30,786 INFO L225 Difference]: With dead ends: 25 [2022-11-23 13:42:30,787 INFO L226 Difference]: Without dead ends: 12 [2022-11-23 13:42:30,789 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 [2022-11-23 13:42:30,792 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 [2022-11-23 13:42:30,793 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] [2022-11-23 13:42:30,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-23 13:42:30,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-23 13:42:30,830 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) [2022-11-23 13:42:30,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2022-11-23 13:42:30,833 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 8 [2022-11-23 13:42:30,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:42:30,834 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2022-11-23 13:42:30,834 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) [2022-11-23 13:42:30,834 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2022-11-23 13:42:30,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 13:42:30,835 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:42:30,835 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:42:30,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 13:42:30,851 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:42:30,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:42:30,852 INFO L85 PathProgramCache]: Analyzing trace with hash 352703344, now seen corresponding path program 1 times [2022-11-23 13:42:30,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:42:30,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306109256] [2022-11-23 13:42:30,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:42:30,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:42:30,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:42:30,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:42:30,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:42:30,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306109256] [2022-11-23 13:42:30,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306109256] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:42:30,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636812262] [2022-11-23 13:42:30,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:42:30,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:42:30,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:42:30,988 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:42:31,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 13:42:31,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:42:31,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 13:42:31,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:42:31,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:42:31,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 13:42:31,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636812262] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:42:31,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 13:42:31,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-23 13:42:31,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279094384] [2022-11-23 13:42:31,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:42:31,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 13:42:31,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:42:31,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 13:42:31,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 13:42:31,112 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) [2022-11-23 13:42:31,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:42:31,134 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2022-11-23 13:42:31,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 13:42:31,135 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 [2022-11-23 13:42:31,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:42:31,136 INFO L225 Difference]: With dead ends: 28 [2022-11-23 13:42:31,136 INFO L226 Difference]: Without dead ends: 21 [2022-11-23 13:42:31,136 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 [2022-11-23 13:42:31,137 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 [2022-11-23 13:42:31,138 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] [2022-11-23 13:42:31,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-23 13:42:31,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 13. [2022-11-23 13:42:31,141 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) [2022-11-23 13:42:31,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2022-11-23 13:42:31,142 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 9 [2022-11-23 13:42:31,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:42:31,143 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2022-11-23 13:42:31,143 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) [2022-11-23 13:42:31,143 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2022-11-23 13:42:31,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 13:42:31,144 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:42:31,144 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:42:31,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 13:42:31,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:42:31,349 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:42:31,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:42:31,350 INFO L85 PathProgramCache]: Analyzing trace with hash -201190691, now seen corresponding path program 1 times [2022-11-23 13:42:31,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:42:31,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644545028] [2022-11-23 13:42:31,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:42:31,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:42:31,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:42:31,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:42:31,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:42:31,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644545028] [2022-11-23 13:42:31,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644545028] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:42:31,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305526367] [2022-11-23 13:42:31,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:42:31,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:42:31,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:42:31,439 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:42:31,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 13:42:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:42:31,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 13:42:31,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:42:31,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:42:31,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:42:31,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 13:42:31,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305526367] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:42:31,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1910387698] [2022-11-23 13:42:31,611 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 13:42:31,612 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:42:31,615 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:42:31,621 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:42:31,621 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:42:31,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:31,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:31,831 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 13:42:31,833 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 [2022-11-23 13:42:31,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:31,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:31,861 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 [2022-11-23 13:42:31,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:31,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:31,944 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 [2022-11-23 13:42:32,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:32,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:32,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:42:32,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:42:32,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:42:32,220 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-23 13:42:32,221 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 [2022-11-23 13:42:32,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:42:32,815 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 13:42:32,815 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 [2022-11-23 13:42:32,857 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:42:33,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1910387698] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:42:33,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:42:33,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 3, 3] total 11 [2022-11-23 13:42:33,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672467004] [2022-11-23 13:42:33,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:42:33,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 13:42:33,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:42:33,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 13:42:33,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-23 13:42:33,124 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) [2022-11-23 13:42:33,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:42:33,190 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2022-11-23 13:42:33,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 13:42:33,190 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 [2022-11-23 13:42:33,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:42:33,191 INFO L225 Difference]: With dead ends: 21 [2022-11-23 13:42:33,191 INFO L226 Difference]: Without dead ends: 14 [2022-11-23 13:42:33,192 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 [2022-11-23 13:42:33,193 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 18 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-11-23 13:42:33,193 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] [2022-11-23 13:42:33,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-23 13:42:33,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-23 13:42:33,198 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) [2022-11-23 13:42:33,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2022-11-23 13:42:33,199 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 10 [2022-11-23 13:42:33,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:42:33,200 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2022-11-23 13:42:33,200 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) [2022-11-23 13:42:33,200 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2022-11-23 13:42:33,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 13:42:33,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:42:33,201 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:42:33,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 13:42:33,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:42:33,406 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:42:33,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:42:33,407 INFO L85 PathProgramCache]: Analyzing trace with hash 975217493, now seen corresponding path program 1 times [2022-11-23 13:42:33,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:42:33,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976794457] [2022-11-23 13:42:33,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:42:33,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:42:33,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:42:33,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:42:33,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:42:33,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976794457] [2022-11-23 13:42:33,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976794457] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:42:33,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294682244] [2022-11-23 13:42:33,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:42:33,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:42:33,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:42:33,528 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:42:33,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 13:42:33,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:42:33,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 13:42:33,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:42:33,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:42:33,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:42:33,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 13:42:33,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294682244] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:42:33,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1824501051] [2022-11-23 13:42:33,659 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 13:42:33,659 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:42:33,659 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:42:33,660 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:42:33,660 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:42:33,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:33,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:33,719 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 13:42:33,719 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 [2022-11-23 13:42:33,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:33,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:33,794 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 13:42:33,795 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 [2022-11-23 13:42:33,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:33,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:33,840 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 [2022-11-23 13:42:33,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:33,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:33,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:33,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:33,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:42:33,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:42:33,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:33,991 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-23 13:42:33,991 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 [2022-11-23 13:42:34,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:42:34,080 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 13:42:34,083 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 [2022-11-23 13:42:34,256 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:42:35,021 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 [2022-11-23 13:42:35,021 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:42:35,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:42:35,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-23 13:42:35,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897091231] [2022-11-23 13:42:35,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:42:35,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 13:42:35,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:42:35,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 13:42:35,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-11-23 13:42:35,023 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) [2022-11-23 13:42:35,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:42:35,063 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2022-11-23 13:42:35,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:42:35,063 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 [2022-11-23 13:42:35,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:42:35,064 INFO L225 Difference]: With dead ends: 28 [2022-11-23 13:42:35,064 INFO L226 Difference]: Without dead ends: 17 [2022-11-23 13:42:35,065 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 [2022-11-23 13:42:35,068 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 [2022-11-23 13:42:35,069 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] [2022-11-23 13:42:35,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-23 13:42:35,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-23 13:42:35,078 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) [2022-11-23 13:42:35,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-11-23 13:42:35,079 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2022-11-23 13:42:35,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:42:35,080 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-11-23 13:42:35,080 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) [2022-11-23 13:42:35,080 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-11-23 13:42:35,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 13:42:35,081 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:42:35,082 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:42:35,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 13:42:35,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:42:35,287 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:42:35,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:42:35,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1636529459, now seen corresponding path program 2 times [2022-11-23 13:42:35,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:42:35,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191527394] [2022-11-23 13:42:35,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:42:35,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:42:35,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:42:35,363 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 13:42:35,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:42:35,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191527394] [2022-11-23 13:42:35,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191527394] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:42:35,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405043546] [2022-11-23 13:42:35,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 13:42:35,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:42:35,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:42:35,365 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:42:35,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 13:42:35,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 13:42:35,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:42:35,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 13:42:35,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:42:35,446 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 13:42:35,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:42:35,462 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 13:42:35,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405043546] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:42:35,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [883118873] [2022-11-23 13:42:35,470 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 13:42:35,471 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:42:35,471 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:42:35,471 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:42:35,471 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:42:35,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:35,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:35,522 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 13:42:35,522 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 [2022-11-23 13:42:35,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:35,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:35,586 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 13:42:35,586 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 [2022-11-23 13:42:35,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:35,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:35,625 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 [2022-11-23 13:42:35,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:35,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:35,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:35,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:35,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:42:35,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:42:35,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:35,802 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-23 13:42:35,802 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 [2022-11-23 13:42:35,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:42:35,878 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 13:42:35,879 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 [2022-11-23 13:42:36,044 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:42:36,787 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 [2022-11-23 13:42:36,787 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:42:36,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:42:36,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-23 13:42:36,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159026658] [2022-11-23 13:42:36,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:42:36,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 13:42:36,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:42:36,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 13:42:36,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-11-23 13:42:36,789 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) [2022-11-23 13:42:36,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:42:36,837 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-11-23 13:42:36,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 13:42:36,837 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 [2022-11-23 13:42:36,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:42:36,838 INFO L225 Difference]: With dead ends: 50 [2022-11-23 13:42:36,838 INFO L226 Difference]: Without dead ends: 43 [2022-11-23 13:42:36,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-11-23 13:42:36,839 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 [2022-11-23 13:42:36,840 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] [2022-11-23 13:42:36,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-23 13:42:36,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 22. [2022-11-23 13:42:36,845 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) [2022-11-23 13:42:36,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-11-23 13:42:36,846 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 14 [2022-11-23 13:42:36,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:42:36,846 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-11-23 13:42:36,846 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) [2022-11-23 13:42:36,847 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-11-23 13:42:36,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-23 13:42:36,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:42:36,847 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:42:36,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 13:42:37,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:42:37,058 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:42:37,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:42:37,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1737865440, now seen corresponding path program 1 times [2022-11-23 13:42:37,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:42:37,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014496576] [2022-11-23 13:42:37,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:42:37,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:42:37,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:42:37,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 13:42:37,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:42:37,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014496576] [2022-11-23 13:42:37,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014496576] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 13:42:37,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 13:42:37,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 13:42:37,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922447520] [2022-11-23 13:42:37,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 13:42:37,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 13:42:37,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:42:37,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 13:42:37,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 13:42:37,183 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) [2022-11-23 13:42:37,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:42:37,215 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2022-11-23 13:42:37,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 13:42:37,216 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 [2022-11-23 13:42:37,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:42:37,216 INFO L225 Difference]: With dead ends: 29 [2022-11-23 13:42:37,216 INFO L226 Difference]: Without dead ends: 22 [2022-11-23 13:42:37,217 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 [2022-11-23 13:42:37,217 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 [2022-11-23 13:42:37,218 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] [2022-11-23 13:42:37,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-23 13:42:37,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-23 13:42:37,222 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) [2022-11-23 13:42:37,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-11-23 13:42:37,223 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2022-11-23 13:42:37,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:42:37,223 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-11-23 13:42:37,223 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) [2022-11-23 13:42:37,223 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-11-23 13:42:37,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-23 13:42:37,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:42:37,228 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:42:37,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 13:42:37,228 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:42:37,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:42:37,229 INFO L85 PathProgramCache]: Analyzing trace with hash 141189372, now seen corresponding path program 3 times [2022-11-23 13:42:37,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:42:37,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660925414] [2022-11-23 13:42:37,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:42:37,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:42:37,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:42:37,380 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 13:42:37,380 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:42:37,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660925414] [2022-11-23 13:42:37,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660925414] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:42:37,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873761893] [2022-11-23 13:42:37,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 13:42:37,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:42:37,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:42:37,382 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:42:37,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 13:42:37,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 13:42:37,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:42:37,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 13:42:37,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:42:37,536 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 13:42:37,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:42:37,631 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 13:42:37,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873761893] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:42:37,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1720161499] [2022-11-23 13:42:37,633 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 13:42:37,633 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:42:37,634 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:42:37,634 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:42:37,634 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:42:37,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:37,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:37,713 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 13:42:37,714 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 [2022-11-23 13:42:37,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:37,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:37,730 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 [2022-11-23 13:42:37,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:37,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:37,761 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 [2022-11-23 13:42:37,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:37,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:37,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:37,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:37,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:42:37,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:42:37,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:37,870 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-23 13:42:37,870 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 [2022-11-23 13:42:37,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:42:37,940 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 13:42:37,940 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 [2022-11-23 13:42:38,083 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:42:38,952 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 [2022-11-23 13:42:38,953 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:42:38,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:42:38,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2022-11-23 13:42:38,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406696705] [2022-11-23 13:42:38,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:42:38,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 13:42:38,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:42:38,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 13:42:38,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2022-11-23 13:42:38,955 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) [2022-11-23 13:42:39,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:42:39,042 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2022-11-23 13:42:39,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 13:42:39,042 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 [2022-11-23 13:42:39,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:42:39,043 INFO L225 Difference]: With dead ends: 51 [2022-11-23 13:42:39,043 INFO L226 Difference]: Without dead ends: 35 [2022-11-23 13:42:39,044 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 [2022-11-23 13:42:39,044 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-11-23 13:42:39,045 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] [2022-11-23 13:42:39,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-23 13:42:39,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-23 13:42:39,051 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) [2022-11-23 13:42:39,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-11-23 13:42:39,056 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 20 [2022-11-23 13:42:39,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:42:39,056 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-11-23 13:42:39,056 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) [2022-11-23 13:42:39,056 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-11-23 13:42:39,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-23 13:42:39,058 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:42:39,058 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:42:39,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 13:42:39,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 13:42:39,264 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:42:39,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:42:39,264 INFO L85 PathProgramCache]: Analyzing trace with hash 536609826, now seen corresponding path program 4 times [2022-11-23 13:42:39,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:42:39,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145061129] [2022-11-23 13:42:39,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:42:39,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:42:39,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:42:39,409 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-23 13:42:39,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:42:39,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145061129] [2022-11-23 13:42:39,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145061129] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:42:39,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839062425] [2022-11-23 13:42:39,410 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 13:42:39,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:42:39,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:42:39,411 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:42:39,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 13:42:39,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:42:39,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 13:42:39,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:42:39,534 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-23 13:42:39,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:42:39,606 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-23 13:42:39,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839062425] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:42:39,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1291398999] [2022-11-23 13:42:39,608 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 13:42:39,608 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:42:39,608 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:42:39,609 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:42:39,609 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:42:39,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:39,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:39,654 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 13:42:39,655 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 [2022-11-23 13:42:39,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:39,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:39,705 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 13:42:39,706 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 [2022-11-23 13:42:39,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:39,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:39,735 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 [2022-11-23 13:42:39,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:39,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:39,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:42:39,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:42:39,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:42:39,871 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-23 13:42:39,871 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 [2022-11-23 13:42:40,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:42:40,111 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 13:42:40,111 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 [2022-11-23 13:42:40,237 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:42:41,095 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 [2022-11-23 13:42:41,096 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:42:41,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:42:41,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-11-23 13:42:41,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225775091] [2022-11-23 13:42:41,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:42:41,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 13:42:41,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:42:41,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 13:42:41,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2022-11-23 13:42:41,097 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) [2022-11-23 13:42:41,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:42:41,142 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2022-11-23 13:42:41,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 13:42:41,143 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 [2022-11-23 13:42:41,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:42:41,145 INFO L225 Difference]: With dead ends: 70 [2022-11-23 13:42:41,146 INFO L226 Difference]: Without dead ends: 42 [2022-11-23 13:42:41,146 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 [2022-11-23 13:42:41,147 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 [2022-11-23 13:42:41,148 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] [2022-11-23 13:42:41,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-23 13:42:41,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-11-23 13:42:41,159 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) [2022-11-23 13:42:41,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2022-11-23 13:42:41,160 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 33 [2022-11-23 13:42:41,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:42:41,161 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2022-11-23 13:42:41,161 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) [2022-11-23 13:42:41,161 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2022-11-23 13:42:41,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-23 13:42:41,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:42:41,162 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:42:41,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 13:42:41,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:42:41,373 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:42:41,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:42:41,374 INFO L85 PathProgramCache]: Analyzing trace with hash 126903194, now seen corresponding path program 5 times [2022-11-23 13:42:41,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:42:41,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882512137] [2022-11-23 13:42:41,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:42:41,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:42:41,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:42:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-23 13:42:41,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:42:41,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882512137] [2022-11-23 13:42:41,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882512137] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:42:41,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093467237] [2022-11-23 13:42:41,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 13:42:41,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:42:41,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:42:41,772 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:42:41,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 13:42:41,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 13:42:41,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:42:41,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-23 13:42:41,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:42:42,187 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-11-23 13:42:42,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:42:42,370 INFO L321 Elim1Store]: treesize reduction 15, result has 81.9 percent of original size [2022-11-23 13:42:42,370 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 [2022-11-23 13:42:42,622 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-11-23 13:42:42,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093467237] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:42:42,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [872798639] [2022-11-23 13:42:42,626 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-23 13:42:42,627 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:42:42,628 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:42:42,628 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:42:42,628 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:42:42,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:42,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:42,683 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 13:42:42,684 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 [2022-11-23 13:42:42,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:42,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:42,743 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 13:42:42,744 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 [2022-11-23 13:42:42,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:42,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:42,789 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 [2022-11-23 13:42:42,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:42,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:42,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:42:42,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:42:42,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:42:42,931 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-23 13:42:42,931 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 [2022-11-23 13:42:43,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:42:43,159 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 13:42:43,160 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 [2022-11-23 13:42:43,288 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:42:44,561 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 [2022-11-23 13:42:44,561 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:42:44,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:42:44,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 26 [2022-11-23 13:42:44,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594901575] [2022-11-23 13:42:44,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:42:44,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-23 13:42:44,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:42:44,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-23 13:42:44,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2022-11-23 13:42:44,564 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) [2022-11-23 13:42:45,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:42:45,061 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2022-11-23 13:42:45,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-23 13:42:45,061 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 [2022-11-23 13:42:45,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:42:45,062 INFO L225 Difference]: With dead ends: 75 [2022-11-23 13:42:45,062 INFO L226 Difference]: Without dead ends: 47 [2022-11-23 13:42:45,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 91 SyntacticMatches, 10 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=426, Invalid=2024, Unknown=0, NotChecked=0, Total=2450 [2022-11-23 13:42:45,064 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:42:45,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 60 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 13:42:45,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-23 13:42:45,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-11-23 13:42:45,073 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) [2022-11-23 13:42:45,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-11-23 13:42:45,073 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 40 [2022-11-23 13:42:45,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:42:45,074 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-11-23 13:42:45,074 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) [2022-11-23 13:42:45,074 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-11-23 13:42:45,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-23 13:42:45,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:42:45,075 INFO L195 NwaCegarLoop]: trace histogram [13, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:42:45,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 13:42:45,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:42:45,276 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:42:45,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:42:45,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1008499743, now seen corresponding path program 1 times [2022-11-23 13:42:45,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:42:45,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676171895] [2022-11-23 13:42:45,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:42:45,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:42:45,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:42:45,709 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-23 13:42:45,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:42:45,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676171895] [2022-11-23 13:42:45,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676171895] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:42:45,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068996891] [2022-11-23 13:42:45,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:42:45,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:42:45,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:42:45,711 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:42:45,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 13:42:45,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:42:45,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 13:42:45,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:42:45,900 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-23 13:42:45,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:42:46,220 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-23 13:42:46,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068996891] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:42:46,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [339399462] [2022-11-23 13:42:46,222 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-23 13:42:46,222 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:42:46,223 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:42:46,223 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:42:46,223 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:42:46,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:46,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:46,281 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 13:42:46,281 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 [2022-11-23 13:42:46,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:46,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:46,320 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 [2022-11-23 13:42:46,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:46,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:46,343 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 [2022-11-23 13:42:46,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:46,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:46,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:42:46,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:42:46,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:42:46,479 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-23 13:42:46,479 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 [2022-11-23 13:42:46,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:42:46,719 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 13:42:46,723 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 [2022-11-23 13:42:46,963 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:42:47,806 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 [2022-11-23 13:42:47,806 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:42:47,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:42:47,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 30 [2022-11-23 13:42:47,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927025306] [2022-11-23 13:42:47,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:42:47,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-23 13:42:47,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:42:47,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-23 13:42:47,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=518, Invalid=1042, Unknown=0, NotChecked=0, Total=1560 [2022-11-23 13:42:47,809 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) [2022-11-23 13:42:47,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:42:47,896 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2022-11-23 13:42:47,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-23 13:42:47,897 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 [2022-11-23 13:42:47,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:42:47,899 INFO L225 Difference]: With dead ends: 90 [2022-11-23 13:42:47,899 INFO L226 Difference]: Without dead ends: 60 [2022-11-23 13:42:47,900 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 [2022-11-23 13:42:47,901 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-11-23 13:42:47,902 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] [2022-11-23 13:42:47,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-23 13:42:47,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-11-23 13:42:47,930 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) [2022-11-23 13:42:47,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-11-23 13:42:47,931 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 44 [2022-11-23 13:42:47,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:42:47,933 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-11-23 13:42:47,933 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) [2022-11-23 13:42:47,933 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-11-23 13:42:47,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-23 13:42:47,939 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:42:47,940 INFO L195 NwaCegarLoop]: trace histogram [28, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:42:47,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 13:42:48,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 13:42:48,156 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:42:48,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:42:48,156 INFO L85 PathProgramCache]: Analyzing trace with hash 409208169, now seen corresponding path program 2 times [2022-11-23 13:42:48,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:42:48,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955061252] [2022-11-23 13:42:48,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:42:48,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:42:48,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:42:49,278 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-23 13:42:49,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:42:49,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955061252] [2022-11-23 13:42:49,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955061252] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:42:49,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516925509] [2022-11-23 13:42:49,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 13:42:49,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:42:49,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:42:49,282 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:42:49,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 13:42:49,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-23 13:42:49,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:42:49,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-23 13:42:49,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:42:49,723 INFO L321 Elim1Store]: treesize reduction 34, result has 35.8 percent of original size [2022-11-23 13:42:49,723 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 [2022-11-23 13:42:49,729 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 [2022-11-23 13:42:49,734 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 [2022-11-23 13:42:49,766 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 [2022-11-23 13:42:49,777 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 [2022-11-23 13:42:50,832 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 28 proven. 38 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-11-23 13:42:50,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:42:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2022-11-23 13:42:51,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516925509] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:42:51,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [10818821] [2022-11-23 13:42:51,152 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-23 13:42:51,152 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:42:51,152 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:42:51,153 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:42:51,153 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:42:51,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:51,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:51,192 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 13:42:51,192 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 [2022-11-23 13:42:51,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:51,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:51,244 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 13:42:51,244 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 [2022-11-23 13:42:51,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:51,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:51,275 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 [2022-11-23 13:42:51,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:51,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:51,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:42:51,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:42:51,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:42:51,409 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-23 13:42:51,409 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 [2022-11-23 13:42:51,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:42:51,618 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 13:42:51,618 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 [2022-11-23 13:42:51,829 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:42:53,152 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 [2022-11-23 13:42:53,153 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:42:53,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:42:53,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 10, 9] total 47 [2022-11-23 13:42:53,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169193888] [2022-11-23 13:42:53,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:42:53,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-23 13:42:53,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:42:53,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-23 13:42:53,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=598, Invalid=2471, Unknown=11, NotChecked=0, Total=3080 [2022-11-23 13:42:53,156 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) [2022-11-23 13:42:55,538 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|)) (.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|))) (and (or (exists ((v_DerPreprocessor_1 (Array Int Int)) (v_DerPreprocessor_2 (Array Int Int)) (|v_ULTIMATE.start_main_~i~1#1_76| Int)) (and (let ((.cse1 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_76| 4)))) (= (select .cse0 .cse1) (select v_DerPreprocessor_2 .cse1))) (= .cse2 (select (store (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base| v_DerPreprocessor_1) |c_ULTIMATE.start_main_~#b~0#1.base| v_DerPreprocessor_2) |c_ULTIMATE.start_main_~#a~0#1.base| v_DerPreprocessor_1) |c_ULTIMATE.start_main_~#b~0#1.base| v_DerPreprocessor_2) |c_ULTIMATE.start_main_~#a~0#1.base|)))) (= |c_ULTIMATE.start_main_~#b~0#1.base| |c_ULTIMATE.start_main_~#a~0#1.base|)) (not (= |c_ULTIMATE.start___VERIFIER_assert_~cond#1| 0)) (= |c_ULTIMATE.start_main_~#b~0#1.offset| 0) (= (select .cse2 (+ |c_ULTIMATE.start_main_~#a~0#1.offset| 4)) (select .cse0 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| 4))) (= |c_ULTIMATE.start_main_~#a~0#1.offset| 0))) is different from true [2022-11-23 13:42:55,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:42:55,551 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2022-11-23 13:42:55,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-23 13:42:55,552 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 [2022-11-23 13:42:55,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:42:55,553 INFO L225 Difference]: With dead ends: 101 [2022-11-23 13:42:55,553 INFO L226 Difference]: Without dead ends: 71 [2022-11-23 13:42:55,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1586, Invalid=6387, Unknown=41, NotChecked=176, Total=8190 [2022-11-23 13:42:55,556 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 58 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 9 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:42:55,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 89 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 245 Invalid, 10 Unknown, 1 Unchecked, 0.3s Time] [2022-11-23 13:42:55,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-23 13:42:55,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2022-11-23 13:42:55,574 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) [2022-11-23 13:42:55,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2022-11-23 13:42:55,575 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 59 [2022-11-23 13:42:55,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:42:55,575 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2022-11-23 13:42:55,576 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) [2022-11-23 13:42:55,576 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2022-11-23 13:42:55,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-23 13:42:55,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:42:55,577 INFO L195 NwaCegarLoop]: trace histogram [29, 10, 10, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:42:55,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 13:42:55,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-23 13:42:55,782 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:42:55,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:42:55,783 INFO L85 PathProgramCache]: Analyzing trace with hash -899601470, now seen corresponding path program 3 times [2022-11-23 13:42:55,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:42:55,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33624327] [2022-11-23 13:42:55,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:42:55,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:42:55,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:42:56,982 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-11-23 13:42:56,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:42:56,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33624327] [2022-11-23 13:42:56,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33624327] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:42:56,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847165467] [2022-11-23 13:42:56,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 13:42:56,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:42:56,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:42:56,984 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:42:56,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 13:42:57,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 13:42:57,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:42:57,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 13:42:57,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:42:57,519 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-11-23 13:42:57,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:42:57,877 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-11-23 13:42:57,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847165467] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:42:57,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1212155284] [2022-11-23 13:42:57,879 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-23 13:42:57,879 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:42:57,879 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:42:57,879 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:42:57,879 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:42:57,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:57,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:57,936 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 13:42:57,936 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 [2022-11-23 13:42:57,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:57,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:57,948 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 [2022-11-23 13:42:57,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:57,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:57,975 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 [2022-11-23 13:42:58,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:58,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:58,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:58,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:58,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:42:58,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:42:58,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:42:58,065 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-23 13:42:58,066 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 [2022-11-23 13:42:58,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:42:58,137 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 13:42:58,138 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 [2022-11-23 13:42:58,349 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:42:59,898 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3563#(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 [2022-11-23 13:42:59,898 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:42:59,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:42:59,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 13, 13] total 54 [2022-11-23 13:42:59,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045369370] [2022-11-23 13:42:59,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:42:59,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-23 13:42:59,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:42:59,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-23 13:42:59,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=814, Invalid=2968, Unknown=0, NotChecked=0, Total=3782 [2022-11-23 13:42:59,901 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) [2022-11-23 13:43:00,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:43:00,047 INFO L93 Difference]: Finished difference Result 122 states and 138 transitions. [2022-11-23 13:43:00,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-23 13:43:00,048 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 [2022-11-23 13:43:00,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:43:00,049 INFO L225 Difference]: With dead ends: 122 [2022-11-23 13:43:00,049 INFO L226 Difference]: Without dead ends: 89 [2022-11-23 13:43:00,050 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 [2022-11-23 13:43:00,050 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 22 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:43:00,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 36 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:43:00,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-23 13:43:00,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-11-23 13:43:00,073 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) [2022-11-23 13:43:00,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2022-11-23 13:43:00,074 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 63 [2022-11-23 13:43:00,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:43:00,074 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2022-11-23 13:43:00,075 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) [2022-11-23 13:43:00,075 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2022-11-23 13:43:00,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-23 13:43:00,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:43:00,076 INFO L195 NwaCegarLoop]: trace histogram [30, 22, 22, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:43:00,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 13:43:00,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:43:00,284 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:43:00,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:43:00,284 INFO L85 PathProgramCache]: Analyzing trace with hash -276979850, now seen corresponding path program 4 times [2022-11-23 13:43:00,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:43:00,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707104160] [2022-11-23 13:43:00,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:43:00,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:43:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:43:01,556 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2022-11-23 13:43:01,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:43:01,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707104160] [2022-11-23 13:43:01,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707104160] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:43:01,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119653767] [2022-11-23 13:43:01,557 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 13:43:01,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:43:01,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:43:01,558 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:43:01,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 13:43:01,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:43:01,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-23 13:43:01,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:43:01,922 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2022-11-23 13:43:01,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:43:03,259 INFO L134 CoverageAnalysis]: Checked inductivity of 956 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2022-11-23 13:43:03,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119653767] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:43:03,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1019078588] [2022-11-23 13:43:03,261 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-23 13:43:03,262 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:43:03,262 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:43:03,262 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:43:03,262 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:43:03,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:03,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:03,304 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 13:43:03,304 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 [2022-11-23 13:43:03,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:03,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:03,349 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 13:43:03,349 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 [2022-11-23 13:43:03,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:03,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:03,379 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 [2022-11-23 13:43:03,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:03,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:03,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:03,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:03,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:43:03,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:43:03,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:03,485 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-23 13:43:03,486 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 [2022-11-23 13:43:03,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:43:03,564 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 13:43:03,566 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 [2022-11-23 13:43:03,818 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:43:06,184 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4500#(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 [2022-11-23 13:43:06,184 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:43:06,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:43:06,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 64 [2022-11-23 13:43:06,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573748145] [2022-11-23 13:43:06,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:43:06,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-23 13:43:06,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:43:06,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-23 13:43:06,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2123, Invalid=3133, Unknown=0, NotChecked=0, Total=5256 [2022-11-23 13:43:06,188 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) [2022-11-23 13:43:06,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:43:06,328 INFO L93 Difference]: Finished difference Result 178 states and 213 transitions. [2022-11-23 13:43:06,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-23 13:43:06,329 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 [2022-11-23 13:43:06,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:43:06,330 INFO L225 Difference]: With dead ends: 178 [2022-11-23 13:43:06,330 INFO L226 Difference]: Without dead ends: 121 [2022-11-23 13:43:06,331 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 [2022-11-23 13:43:06,332 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 13:43:06,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 13:43:06,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-23 13:43:06,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-11-23 13:43:06,372 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) [2022-11-23 13:43:06,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2022-11-23 13:43:06,373 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 88 [2022-11-23 13:43:06,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:43:06,373 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2022-11-23 13:43:06,374 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) [2022-11-23 13:43:06,374 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2022-11-23 13:43:06,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-23 13:43:06,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:43:06,375 INFO L195 NwaCegarLoop]: trace histogram [62, 22, 22, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:43:06,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 13:43:06,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:43:06,582 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:43:06,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:43:06,583 INFO L85 PathProgramCache]: Analyzing trace with hash -2051494026, now seen corresponding path program 5 times [2022-11-23 13:43:06,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:43:06,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115826855] [2022-11-23 13:43:06,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:43:06,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:43:06,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:43:10,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2444 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2022-11-23 13:43:10,344 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:43:10,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115826855] [2022-11-23 13:43:10,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115826855] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:43:10,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190589202] [2022-11-23 13:43:10,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 13:43:10,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:43:10,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:43:10,346 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:43:10,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 13:43:11,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-23 13:43:11,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:43:11,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-23 13:43:11,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:43:12,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2444 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 2314 trivial. 0 not checked. [2022-11-23 13:43:12,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:43:13,116 INFO L321 Elim1Store]: treesize reduction 15, result has 83.5 percent of original size [2022-11-23 13:43:13,116 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 [2022-11-23 13:43:13,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2444 backedges. 19 proven. 111 refuted. 0 times theorem prover too weak. 2314 trivial. 0 not checked. [2022-11-23 13:43:13,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190589202] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:43:13,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1454572405] [2022-11-23 13:43:13,825 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-23 13:43:13,825 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:43:13,826 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:43:13,826 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:43:13,826 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:43:13,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:13,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:13,878 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 13:43:13,878 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 [2022-11-23 13:43:13,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:13,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:13,932 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 13:43:13,932 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 [2022-11-23 13:43:13,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:13,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:13,967 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 [2022-11-23 13:43:14,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:14,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:14,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:14,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:14,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:43:14,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:43:14,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:14,104 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-23 13:43:14,104 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 [2022-11-23 13:43:14,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:43:14,171 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 13:43:14,171 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 [2022-11-23 13:43:14,375 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:43:16,066 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5814#(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 [2022-11-23 13:43:16,066 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:43:16,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:43:16,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 12, 12] total 86 [2022-11-23 13:43:16,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403169931] [2022-11-23 13:43:16,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:43:16,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-11-23 13:43:16,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:43:16,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-11-23 13:43:16,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2225, Invalid=6705, Unknown=0, NotChecked=0, Total=8930 [2022-11-23 13:43:16,073 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) [2022-11-23 13:43:19,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:43:19,727 INFO L93 Difference]: Finished difference Result 184 states and 189 transitions. [2022-11-23 13:43:19,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-11-23 13:43:19,727 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 [2022-11-23 13:43:19,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:43:19,728 INFO L225 Difference]: With dead ends: 184 [2022-11-23 13:43:19,728 INFO L226 Difference]: Without dead ends: 127 [2022-11-23 13:43:19,733 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 [2022-11-23 13:43:19,734 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 70 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:43:19,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 77 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 13:43:19,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-23 13:43:19,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2022-11-23 13:43:19,762 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) [2022-11-23 13:43:19,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2022-11-23 13:43:19,762 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 120 [2022-11-23 13:43:19,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:43:19,763 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2022-11-23 13:43:19,763 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) [2022-11-23 13:43:19,763 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2022-11-23 13:43:19,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-23 13:43:19,764 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:43:19,765 INFO L195 NwaCegarLoop]: trace histogram [63, 22, 22, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:43:19,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 13:43:19,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 13:43:19,972 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:43:19,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:43:19,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1866749307, now seen corresponding path program 6 times [2022-11-23 13:43:19,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:43:19,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552144051] [2022-11-23 13:43:19,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:43:19,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:43:20,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:43:23,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2515 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2022-11-23 13:43:23,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:43:23,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552144051] [2022-11-23 13:43:23,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552144051] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:43:23,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354717056] [2022-11-23 13:43:23,715 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 13:43:23,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:43:23,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:43:23,716 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:43:23,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 13:43:24,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 13:43:24,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:43:24,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 1394 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 13:43:24,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:43:25,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2515 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2031 trivial. 0 not checked. [2022-11-23 13:43:25,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:43:26,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2515 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2031 trivial. 0 not checked. [2022-11-23 13:43:26,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354717056] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:43:26,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [918144536] [2022-11-23 13:43:26,454 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-23 13:43:26,454 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:43:26,455 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:43:26,455 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:43:26,455 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:43:26,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:26,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:26,505 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 13:43:26,506 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 [2022-11-23 13:43:26,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:26,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:26,517 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 [2022-11-23 13:43:26,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:26,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:26,539 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 [2022-11-23 13:43:26,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:26,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:26,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:43:26,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:43:26,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:43:26,659 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-23 13:43:26,659 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 [2022-11-23 13:43:26,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:43:26,863 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 13:43:26,863 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 [2022-11-23 13:43:27,089 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:43:28,659 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7336#(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 [2022-11-23 13:43:28,659 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:43:28,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:43:28,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 25, 25] total 112 [2022-11-23 13:43:28,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697657234] [2022-11-23 13:43:28,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:43:28,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-11-23 13:43:28,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:43:28,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-11-23 13:43:28,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3325, Invalid=11195, Unknown=0, NotChecked=0, Total=14520 [2022-11-23 13:43:28,663 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) [2022-11-23 13:43:28,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:43:28,936 INFO L93 Difference]: Finished difference Result 234 states and 262 transitions. [2022-11-23 13:43:28,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-11-23 13:43:28,937 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 [2022-11-23 13:43:28,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:43:28,938 INFO L225 Difference]: With dead ends: 234 [2022-11-23 13:43:28,938 INFO L226 Difference]: Without dead ends: 174 [2022-11-23 13:43:28,940 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 [2022-11-23 13:43:28,941 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 46 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:43:28,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 66 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 13:43:28,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-11-23 13:43:28,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-11-23 13:43:28,977 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) [2022-11-23 13:43:28,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 176 transitions. [2022-11-23 13:43:28,977 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 176 transitions. Word has length 124 [2022-11-23 13:43:28,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:43:28,978 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 176 transitions. [2022-11-23 13:43:28,978 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) [2022-11-23 13:43:28,978 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 176 transitions. [2022-11-23 13:43:28,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-23 13:43:28,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:43:28,980 INFO L195 NwaCegarLoop]: trace histogram [64, 46, 46, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:43:28,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 13:43:29,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 13:43:29,188 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:43:29,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:43:29,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1803810411, now seen corresponding path program 7 times [2022-11-23 13:43:29,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:43:29,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803745261] [2022-11-23 13:43:29,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:43:29,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:43:29,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:43:32,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4211 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 2131 trivial. 0 not checked. [2022-11-23 13:43:32,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:43:32,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803745261] [2022-11-23 13:43:32,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803745261] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:43:32,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147541743] [2022-11-23 13:43:32,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 13:43:32,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:43:32,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:43:32,897 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:43:32,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 13:43:33,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:43:33,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 1627 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-23 13:43:33,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:43:33,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4211 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 2131 trivial. 0 not checked. [2022-11-23 13:43:33,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:43:38,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4211 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 2131 trivial. 0 not checked. [2022-11-23 13:43:38,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147541743] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:43:38,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1272898817] [2022-11-23 13:43:38,742 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-23 13:43:38,742 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:43:38,743 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:43:38,743 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:43:38,743 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:43:38,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:38,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:38,783 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 13:43:38,784 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 [2022-11-23 13:43:38,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:38,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:38,835 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 13:43:38,836 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 [2022-11-23 13:43:38,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:38,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:38,863 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 [2022-11-23 13:43:38,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:38,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:38,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:38,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:38,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:43:38,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:43:38,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:43:38,944 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-23 13:43:38,944 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 [2022-11-23 13:43:39,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:43:39,021 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 13:43:39,022 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 [2022-11-23 13:43:39,239 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:43:44,662 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9180#(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 [2022-11-23 13:43:44,662 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:43:44,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:43:44,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 132 [2022-11-23 13:43:44,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160609659] [2022-11-23 13:43:44,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:43:44,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-11-23 13:43:44,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:43:44,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-11-23 13:43:44,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8821, Invalid=10919, Unknown=0, NotChecked=0, Total=19740 [2022-11-23 13:43:44,667 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) [2022-11-23 13:43:44,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:43:44,967 INFO L93 Difference]: Finished difference Result 348 states and 417 transitions. [2022-11-23 13:43:44,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-11-23 13:43:44,968 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 [2022-11-23 13:43:44,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:43:44,968 INFO L225 Difference]: With dead ends: 348 [2022-11-23 13:43:44,968 INFO L226 Difference]: Without dead ends: 240 [2022-11-23 13:43:44,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 398 SyntacticMatches, 46 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10792 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=8821, Invalid=10919, Unknown=0, NotChecked=0, Total=19740 [2022-11-23 13:43:44,970 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 13:43:44,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 64 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 13:43:44,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-11-23 13:43:45,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-11-23 13:43:45,018 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) [2022-11-23 13:43:45,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 242 transitions. [2022-11-23 13:43:45,019 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 242 transitions. Word has length 173 [2022-11-23 13:43:45,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:43:45,019 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 242 transitions. [2022-11-23 13:43:45,020 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) [2022-11-23 13:43:45,020 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 242 transitions. [2022-11-23 13:43:45,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-11-23 13:43:45,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:43:45,023 INFO L195 NwaCegarLoop]: trace histogram [130, 46, 46, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:43:45,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 13:43:45,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 13:43:45,230 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:43:45,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:43:45,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1650919275, now seen corresponding path program 8 times [2022-11-23 13:43:45,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:43:45,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661249219] [2022-11-23 13:43:45,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:43:45,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:43:45,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:43:57,534 INFO L134 CoverageAnalysis]: Checked inductivity of 10646 backedges. 0 proven. 8515 refuted. 0 times theorem prover too weak. 2131 trivial. 0 not checked. [2022-11-23 13:43:57,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:43:57,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661249219] [2022-11-23 13:43:57,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661249219] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:43:57,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200429492] [2022-11-23 13:43:57,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 13:43:57,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:43:57,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:43:57,536 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:43:57,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 13:44:00,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-23 13:44:00,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:44:00,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-23 13:44:00,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:44:02,322 INFO L134 CoverageAnalysis]: Checked inductivity of 10646 backedges. 0 proven. 367 refuted. 0 times theorem prover too weak. 10279 trivial. 0 not checked. [2022-11-23 13:44:02,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:44:03,272 INFO L321 Elim1Store]: treesize reduction 15, result has 83.5 percent of original size [2022-11-23 13:44:03,272 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 [2022-11-23 13:44:04,409 INFO L134 CoverageAnalysis]: Checked inductivity of 10646 backedges. 42 proven. 325 refuted. 0 times theorem prover too weak. 10279 trivial. 0 not checked. [2022-11-23 13:44:04,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200429492] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:44:04,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1897796981] [2022-11-23 13:44:04,411 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-23 13:44:04,412 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:44:04,412 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:44:04,412 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:44:04,412 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:44:04,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:44:04,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:44:04,456 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 13:44:04,457 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 [2022-11-23 13:44:04,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:44:04,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:44:04,502 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 13:44:04,502 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 [2022-11-23 13:44:04,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:44:04,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:44:04,523 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 [2022-11-23 13:44:04,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:44:04,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:44:04,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:44:04,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:44:04,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:44:04,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:44:04,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:44:04,609 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-23 13:44:04,609 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 [2022-11-23 13:44:04,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:44:04,681 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 13:44:04,681 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 [2022-11-23 13:44:04,848 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:44:15,815 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11780#(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 [2022-11-23 13:44:15,816 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:44:15,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:44:15,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 14, 14] total 158 [2022-11-23 13:44:15,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689029373] [2022-11-23 13:44:15,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:44:15,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2022-11-23 13:44:15,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:44:15,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2022-11-23 13:44:15,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8927, Invalid=18463, Unknown=0, NotChecked=0, Total=27390 [2022-11-23 13:44:15,820 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) [2022-11-23 13:44:27,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:44:27,600 INFO L93 Difference]: Finished difference Result 354 states and 359 transitions. [2022-11-23 13:44:27,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-11-23 13:44:27,600 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 [2022-11-23 13:44:27,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:44:27,601 INFO L225 Difference]: With dead ends: 354 [2022-11-23 13:44:27,601 INFO L226 Difference]: Without dead ends: 246 [2022-11-23 13:44:27,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 987 GetRequests, 637 SyntacticMatches, 46 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22836 ImplicationChecksByTransitivity, 31.2s TimeCoverageRelationStatistics Valid=26573, Invalid=66757, Unknown=0, NotChecked=0, Total=93330 [2022-11-23 13:44:27,607 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 87 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 13:44:27,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 138 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 13:44:27,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-11-23 13:44:27,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 244. [2022-11-23 13:44:27,653 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) [2022-11-23 13:44:27,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 246 transitions. [2022-11-23 13:44:27,654 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 246 transitions. Word has length 239 [2022-11-23 13:44:27,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:44:27,654 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 246 transitions. [2022-11-23 13:44:27,655 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) [2022-11-23 13:44:27,655 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 246 transitions. [2022-11-23 13:44:27,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-11-23 13:44:27,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:44:27,658 INFO L195 NwaCegarLoop]: trace histogram [131, 46, 46, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:44:27,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-23 13:44:27,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 13:44:27,866 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:44:27,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:44:27,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1401019114, now seen corresponding path program 9 times [2022-11-23 13:44:27,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:44:27,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571949544] [2022-11-23 13:44:27,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:44:27,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:44:28,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:44:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 10788 backedges. 0 proven. 8646 refuted. 0 times theorem prover too weak. 2142 trivial. 0 not checked. [2022-11-23 13:44:40,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:44:40,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571949544] [2022-11-23 13:44:40,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571949544] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:44:40,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568963252] [2022-11-23 13:44:40,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 13:44:40,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:44:40,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:44:40,351 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:44:40,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-23 13:44:41,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 13:44:41,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:44:41,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 2778 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-23 13:44:41,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:44:44,810 INFO L134 CoverageAnalysis]: Checked inductivity of 10788 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 8672 trivial. 0 not checked. [2022-11-23 13:44:44,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:44:50,063 INFO L134 CoverageAnalysis]: Checked inductivity of 10788 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 8672 trivial. 0 not checked. [2022-11-23 13:44:50,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568963252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:44:50,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [365647632] [2022-11-23 13:44:50,065 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-23 13:44:50,065 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:44:50,065 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:44:50,066 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:44:50,066 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:44:50,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:44:50,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:44:50,122 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 13:44:50,122 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 [2022-11-23 13:44:50,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:44:50,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:44:50,136 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 [2022-11-23 13:44:50,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:44:50,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:44:50,162 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 [2022-11-23 13:44:50,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:44:50,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:44:50,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:44:50,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:44:50,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:44:50,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:44:50,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:44:50,259 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-23 13:44:50,260 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 [2022-11-23 13:44:50,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:44:50,324 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 13:44:50,324 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 [2022-11-23 13:44:50,566 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:44:53,130 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14769#(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 [2022-11-23 13:44:53,131 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:44:53,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:44:53,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 49, 49] total 228 [2022-11-23 13:44:53,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797692252] [2022-11-23 13:44:53,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:44:53,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 228 states [2022-11-23 13:44:53,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:44:53,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 228 interpolants. [2022-11-23 13:44:53,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13523, Invalid=42409, Unknown=0, NotChecked=0, Total=55932 [2022-11-23 13:44:53,136 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) [2022-11-23 13:44:53,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:44:53,878 INFO L93 Difference]: Finished difference Result 452 states and 504 transitions. [2022-11-23 13:44:53,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 228 states. [2022-11-23 13:44:53,878 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 [2022-11-23 13:44:53,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:44:53,880 INFO L225 Difference]: With dead ends: 452 [2022-11-23 13:44:53,881 INFO L226 Difference]: Without dead ends: 341 [2022-11-23 13:44:53,884 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 [2022-11-23 13:44:53,885 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 141 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 13:44:53,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 54 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 13:44:53,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-11-23 13:44:53,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 341. [2022-11-23 13:44:53,932 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) [2022-11-23 13:44:53,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 343 transitions. [2022-11-23 13:44:53,932 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 343 transitions. Word has length 243 [2022-11-23 13:44:53,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:44:53,933 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 343 transitions. [2022-11-23 13:44:53,933 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) [2022-11-23 13:44:53,933 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 343 transitions. [2022-11-23 13:44:53,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2022-11-23 13:44:53,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:44:53,936 INFO L195 NwaCegarLoop]: trace histogram [132, 94, 94, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:44:53,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-23 13:44:54,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 13:44:54,143 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:44:54,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:44:54,144 INFO L85 PathProgramCache]: Analyzing trace with hash -2018186114, now seen corresponding path program 10 times [2022-11-23 13:44:54,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:44:54,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490828186] [2022-11-23 13:44:54,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:44:54,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:44:54,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:45:07,860 INFO L134 CoverageAnalysis]: Checked inductivity of 17640 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 8862 trivial. 0 not checked. [2022-11-23 13:45:07,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:45:07,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490828186] [2022-11-23 13:45:07,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490828186] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:45:07,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236137355] [2022-11-23 13:45:07,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 13:45:07,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:45:07,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:45:07,864 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:45:07,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-23 13:45:08,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:45:08,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 3227 conjuncts, 134 conjunts are in the unsatisfiable core [2022-11-23 13:45:08,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:45:09,182 INFO L134 CoverageAnalysis]: Checked inductivity of 17640 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 8862 trivial. 0 not checked. [2022-11-23 13:45:09,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:45:30,071 INFO L134 CoverageAnalysis]: Checked inductivity of 17640 backedges. 0 proven. 8778 refuted. 0 times theorem prover too weak. 8862 trivial. 0 not checked. [2022-11-23 13:45:30,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236137355] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:45:30,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [944188750] [2022-11-23 13:45:30,073 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-23 13:45:30,073 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:45:30,073 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:45:30,074 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:45:30,074 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:45:30,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:30,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:30,113 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 13:45:30,113 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 [2022-11-23 13:45:30,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:30,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:30,158 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 13:45:30,158 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 [2022-11-23 13:45:30,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:30,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:30,185 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 [2022-11-23 13:45:30,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:30,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:30,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:30,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:30,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:30,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:30,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:45:30,290 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-23 13:45:30,290 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 [2022-11-23 13:45:30,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:45:30,353 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 13:45:30,353 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 [2022-11-23 13:45:30,542 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:45:32,672 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18395#(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 [2022-11-23 13:45:32,673 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:45:32,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:45:32,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 134, 134] total 268 [2022-11-23 13:45:32,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375272108] [2022-11-23 13:45:32,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:45:32,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 269 states [2022-11-23 13:45:32,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:45:32,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 269 interpolants. [2022-11-23 13:45:32,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36099, Invalid=40907, Unknown=0, NotChecked=0, Total=77006 [2022-11-23 13:45:32,686 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) [2022-11-23 13:45:33,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:45:33,682 INFO L93 Difference]: Finished difference Result 682 states and 819 transitions. [2022-11-23 13:45:33,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 268 states. [2022-11-23 13:45:33,683 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 [2022-11-23 13:45:33,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:45:33,685 INFO L225 Difference]: With dead ends: 682 [2022-11-23 13:45:33,685 INFO L226 Difference]: Without dead ends: 475 [2022-11-23 13:45:33,690 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 [2022-11-23 13:45:33,691 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 13:45:33,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 64 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 13:45:33,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-11-23 13:45:33,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 475. [2022-11-23 13:45:33,757 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) [2022-11-23 13:45:33,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 477 transitions. [2022-11-23 13:45:33,759 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 477 transitions. Word has length 340 [2022-11-23 13:45:33,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:45:33,759 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 477 transitions. [2022-11-23 13:45:33,760 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) [2022-11-23 13:45:33,760 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 477 transitions. [2022-11-23 13:45:33,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2022-11-23 13:45:33,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:45:33,763 INFO L195 NwaCegarLoop]: trace histogram [266, 94, 94, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:45:33,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-23 13:45:33,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:45:33,974 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:45:33,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:45:33,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1279434622, now seen corresponding path program 11 times [2022-11-23 13:45:33,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:45:33,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562688323] [2022-11-23 13:45:33,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:45:33,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:45:34,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:46:25,518 INFO L134 CoverageAnalysis]: Checked inductivity of 44373 backedges. 0 proven. 35511 refuted. 0 times theorem prover too weak. 8862 trivial. 0 not checked. [2022-11-23 13:46:25,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:46:25,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562688323] [2022-11-23 13:46:25,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562688323] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:46:25,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514537007] [2022-11-23 13:46:25,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 13:46:25,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:46:25,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:46:25,527 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:46:25,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-23 13:46:31,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-23 13:46:31,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:46:31,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-23 13:46:31,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:46:35,722 INFO L134 CoverageAnalysis]: Checked inductivity of 44373 backedges. 0 proven. 941 refuted. 0 times theorem prover too weak. 43432 trivial. 0 not checked. [2022-11-23 13:46:35,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:46:37,761 INFO L321 Elim1Store]: treesize reduction 15, result has 83.5 percent of original size [2022-11-23 13:46:37,762 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 [2022-11-23 13:46:39,865 INFO L134 CoverageAnalysis]: Checked inductivity of 44373 backedges. 89 proven. 852 refuted. 0 times theorem prover too weak. 43432 trivial. 0 not checked. [2022-11-23 13:46:39,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514537007] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:46:39,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1313156899] [2022-11-23 13:46:39,867 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-23 13:46:39,868 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:46:39,868 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:46:39,868 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:46:39,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:46:39,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:46:39,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:46:39,917 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 13:46:39,917 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 [2022-11-23 13:46:39,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:46:39,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:46:39,934 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 [2022-11-23 13:46:39,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:46:39,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:46:39,958 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 [2022-11-23 13:46:40,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:46:40,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:46:40,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:46:40,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:46:40,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:46:40,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:46:40,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:46:40,040 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-23 13:46:40,040 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 [2022-11-23 13:46:40,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:46:40,123 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 13:46:40,123 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 [2022-11-23 13:46:40,393 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:47:17,607 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23534#(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 [2022-11-23 13:47:17,607 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:47:17,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:47:17,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [268, 16, 16] total 298 [2022-11-23 13:47:17,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703857131] [2022-11-23 13:47:17,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:47:17,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 298 states [2022-11-23 13:47:17,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:47:17,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 298 interpolants. [2022-11-23 13:47:17,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36210, Invalid=57120, Unknown=0, NotChecked=0, Total=93330 [2022-11-23 13:47:17,622 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) [2022-11-23 13:48:00,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:48:00,647 INFO L93 Difference]: Finished difference Result 688 states and 693 transitions. [2022-11-23 13:48:00,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 292 states. [2022-11-23 13:48:00,655 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 [2022-11-23 13:48:00,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:48:00,658 INFO L225 Difference]: With dead ends: 688 [2022-11-23 13:48:00,658 INFO L226 Difference]: Without dead ends: 481 [2022-11-23 13:48:00,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1967 GetRequests, 1290 SyntacticMatches, 94 SemanticMatches, 583 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79636 ImplicationChecksByTransitivity, 111.3s TimeCoverageRelationStatistics Valid=108426, Invalid=233214, Unknown=0, NotChecked=0, Total=341640 [2022-11-23 13:48:00,674 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 98 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 13:48:00,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 168 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 13:48:00,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-11-23 13:48:00,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 479. [2022-11-23 13:48:00,765 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) [2022-11-23 13:48:00,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 481 transitions. [2022-11-23 13:48:00,767 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 481 transitions. Word has length 474 [2022-11-23 13:48:00,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:48:00,768 INFO L495 AbstractCegarLoop]: Abstraction has 479 states and 481 transitions. [2022-11-23 13:48:00,769 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) [2022-11-23 13:48:00,769 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 481 transitions. [2022-11-23 13:48:00,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2022-11-23 13:48:00,771 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:48:00,772 INFO L195 NwaCegarLoop]: trace histogram [267, 94, 94, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:48:00,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-23 13:48:00,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:48:00,985 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:48:00,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:48:00,986 INFO L85 PathProgramCache]: Analyzing trace with hash -554107011, now seen corresponding path program 12 times [2022-11-23 13:48:00,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:48:00,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714439411] [2022-11-23 13:48:00,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:48:00,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:48:01,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:48:55,151 INFO L134 CoverageAnalysis]: Checked inductivity of 44654 backedges. 0 proven. 35778 refuted. 0 times theorem prover too weak. 8876 trivial. 0 not checked. [2022-11-23 13:48:55,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:48:55,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714439411] [2022-11-23 13:48:55,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714439411] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:48:55,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067177769] [2022-11-23 13:48:55,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 13:48:55,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:48:55,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:48:55,156 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:48:55,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-23 13:48:57,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 13:48:57,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 13:48:57,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 5534 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-23 13:48:57,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:49:11,370 INFO L134 CoverageAnalysis]: Checked inductivity of 44654 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 35818 trivial. 0 not checked. [2022-11-23 13:49:11,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:49:33,996 INFO L134 CoverageAnalysis]: Checked inductivity of 44654 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 35818 trivial. 0 not checked. [2022-11-23 13:49:33,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067177769] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:49:33,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [621123594] [2022-11-23 13:49:33,998 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-23 13:49:33,999 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:49:33,999 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:49:33,999 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:49:33,999 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:49:34,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:34,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:34,053 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 13:49:34,054 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 [2022-11-23 13:49:34,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:34,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:34,065 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 [2022-11-23 13:49:34,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:34,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:34,087 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 [2022-11-23 13:49:34,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:34,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:34,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:34,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:34,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:49:34,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:49:34,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:49:34,180 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-23 13:49:34,180 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 [2022-11-23 13:49:34,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:49:34,245 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 13:49:34,246 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 [2022-11-23 13:49:34,436 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:50:20,395 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29431#(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 [2022-11-23 13:50:20,395 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:50:20,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:50:20,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [269, 97, 97] total 460 [2022-11-23 13:50:20,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322473590] [2022-11-23 13:50:20,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:50:20,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 460 states [2022-11-23 13:50:20,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:50:20,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 460 interpolants. [2022-11-23 13:50:20,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54693, Invalid=163863, Unknown=0, NotChecked=0, Total=218556 [2022-11-23 13:50:20,412 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) [2022-11-23 13:50:23,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:50:23,572 INFO L93 Difference]: Finished difference Result 882 states and 982 transitions. [2022-11-23 13:50:23,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 460 states. [2022-11-23 13:50:23,572 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 [2022-11-23 13:50:23,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:50:23,575 INFO L225 Difference]: With dead ends: 882 [2022-11-23 13:50:23,575 INFO L226 Difference]: Without dead ends: 672 [2022-11-23 13:50:23,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1701 GetRequests, 1141 SyntacticMatches, 94 SemanticMatches, 466 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106836 ImplicationChecksByTransitivity, 111.1s TimeCoverageRelationStatistics Valid=54693, Invalid=163863, Unknown=0, NotChecked=0, Total=218556 [2022-11-23 13:50:23,590 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 190 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 13:50:23,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 84 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 13:50:23,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-11-23 13:50:23,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 672. [2022-11-23 13:50:23,709 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) [2022-11-23 13:50:23,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 674 transitions. [2022-11-23 13:50:23,711 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 674 transitions. Word has length 478 [2022-11-23 13:50:23,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:50:23,712 INFO L495 AbstractCegarLoop]: Abstraction has 672 states and 674 transitions. [2022-11-23 13:50:23,713 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) [2022-11-23 13:50:23,713 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 674 transitions. [2022-11-23 13:50:23,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 672 [2022-11-23 13:50:23,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:50:23,718 INFO L195 NwaCegarLoop]: trace histogram [268, 190, 190, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:50:23,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-23 13:50:23,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-23 13:50:23,935 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:50:23,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:50:23,936 INFO L85 PathProgramCache]: Analyzing trace with hash -271906779, now seen corresponding path program 13 times [2022-11-23 13:50:23,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:50:23,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498116975] [2022-11-23 13:50:23,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:50:23,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:50:24,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:26,502 INFO L134 CoverageAnalysis]: Checked inductivity of 72186 backedges. 0 proven. 36046 refuted. 0 times theorem prover too weak. 36140 trivial. 0 not checked. [2022-11-23 13:51:26,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 13:51:26,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498116975] [2022-11-23 13:51:26,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498116975] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 13:51:26,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670284112] [2022-11-23 13:51:26,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 13:51:26,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 13:51:26,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 13:51:26,506 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 13:51:26,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-23 13:51:28,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 13:51:28,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 6415 conjuncts, 270 conjunts are in the unsatisfiable core [2022-11-23 13:51:28,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 13:51:29,345 INFO L134 CoverageAnalysis]: Checked inductivity of 72186 backedges. 0 proven. 36046 refuted. 0 times theorem prover too weak. 36140 trivial. 0 not checked. [2022-11-23 13:51:29,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 13:52:58,094 INFO L134 CoverageAnalysis]: Checked inductivity of 72186 backedges. 0 proven. 36046 refuted. 0 times theorem prover too weak. 36140 trivial. 0 not checked. [2022-11-23 13:52:58,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670284112] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 13:52:58,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [170161862] [2022-11-23 13:52:58,095 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-23 13:52:58,096 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 13:52:58,096 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 13:52:58,096 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 13:52:58,096 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 13:52:58,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:52:58,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:52:58,137 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-23 13:52:58,137 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 [2022-11-23 13:52:58,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:52:58,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:52:58,190 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-23 13:52:58,190 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 [2022-11-23 13:52:58,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:52:58,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:52:58,223 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 [2022-11-23 13:52:58,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:52:58,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 13:52:58,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:52:58,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:52:58,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:52:58,363 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-23 13:52:58,363 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 [2022-11-23 13:52:58,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 13:52:58,574 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 13:52:58,575 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 [2022-11-23 13:52:58,782 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 13:54:03,636 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '36590#(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 [2022-11-23 13:54:03,636 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 13:54:03,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 13:54:03,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [270, 270, 270] total 540 [2022-11-23 13:54:03,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906109602] [2022-11-23 13:54:03,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 13:54:03,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 541 states [2022-11-23 13:54:03,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 13:54:03,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 541 interpolants. [2022-11-23 13:54:03,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146113, Invalid=154739, Unknown=0, NotChecked=0, Total=300852 [2022-11-23 13:54:03,669 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) [2022-11-23 13:54:10,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 13:54:10,209 INFO L93 Difference]: Finished difference Result 1344 states and 1617 transitions. [2022-11-23 13:54:10,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 540 states. [2022-11-23 13:54:10,213 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 [2022-11-23 13:54:10,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 13:54:10,217 INFO L225 Difference]: With dead ends: 1344 [2022-11-23 13:54:10,217 INFO L226 Difference]: Without dead ends: 942 [2022-11-23 13:54:10,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2281 GetRequests, 1544 SyntacticMatches, 190 SemanticMatches, 547 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160864 ImplicationChecksByTransitivity, 183.3s TimeCoverageRelationStatistics Valid=146113, Invalid=154739, Unknown=0, NotChecked=0, Total=300852 [2022-11-23 13:54:10,236 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 13:54:10,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 88 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 13:54:10,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2022-11-23 13:54:10,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 942. [2022-11-23 13:54:10,387 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) [2022-11-23 13:54:10,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 944 transitions. [2022-11-23 13:54:10,389 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 944 transitions. Word has length 671 [2022-11-23 13:54:10,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 13:54:10,389 INFO L495 AbstractCegarLoop]: Abstraction has 942 states and 944 transitions. [2022-11-23 13:54:10,390 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) [2022-11-23 13:54:10,391 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 944 transitions. [2022-11-23 13:54:10,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 942 [2022-11-23 13:54:10,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 13:54:10,399 INFO L195 NwaCegarLoop]: trace histogram [538, 190, 190, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 13:54:10,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-23 13:54:10,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f45b2c08-a2fa-40c1-90b5-2451f3de791d/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-23 13:54:10,600 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 13:54:10,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 13:54:10,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1021513435, now seen corresponding path program 14 times [2022-11-23 13:54:10,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 13:54:10,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915569116] [2022-11-23 13:54:10,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 13:54:10,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 13:54:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat