./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test23-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_f0c39857-30a6-4b91-a18d-02afaa6a4394/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c39857-30a6-4b91-a18d-02afaa6a4394/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c39857-30a6-4b91-a18d-02afaa6a4394/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c39857-30a6-4b91-a18d-02afaa6a4394/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/test23-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c39857-30a6-4b91-a18d-02afaa6a4394/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c39857-30a6-4b91-a18d-02afaa6a4394/bin/utaipan-gh47qXpMRh --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 4c2b7377d2b430a15e16457512411598a883b6588c528bba211e64f887de4d8e --- 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-2329fc7 [2022-12-14 08:30:39,093 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:30:39,094 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:30:39,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:30:39,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:30:39,109 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:30:39,110 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:30:39,111 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:30:39,112 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:30:39,112 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:30:39,113 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:30:39,114 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:30:39,114 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:30:39,115 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:30:39,116 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:30:39,116 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:30:39,117 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:30:39,118 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:30:39,119 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:30:39,120 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:30:39,121 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:30:39,122 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:30:39,123 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:30:39,124 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:30:39,128 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:30:39,128 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:30:39,129 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:30:39,130 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:30:39,130 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:30:39,131 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:30:39,132 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:30:39,133 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:30:39,133 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:30:39,134 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:30:39,135 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:30:39,135 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:30:39,136 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:30:39,136 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:30:39,136 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:30:39,137 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:30:39,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:30:39,138 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c39857-30a6-4b91-a18d-02afaa6a4394/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 08:30:39,161 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:30:39,161 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:30:39,162 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:30:39,162 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:30:39,163 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:30:39,163 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:30:39,163 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:30:39,163 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:30:39,163 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:30:39,163 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:30:39,164 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:30:39,164 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:30:39,164 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:30:39,164 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:30:39,164 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:30:39,165 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:30:39,165 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:30:39,165 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:30:39,165 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:30:39,166 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:30:39,166 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:30:39,166 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:30:39,166 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:30:39,166 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 08:30:39,166 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:30:39,166 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 08:30:39,166 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:30:39,166 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 08:30:39,167 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:30:39,167 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 08:30:39,167 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:30:39,167 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:30:39,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:30:39,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:30:39,168 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:30:39,168 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:30:39,168 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 08:30:39,168 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:30:39,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:30:39,168 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 08:30:39,168 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:30:39,168 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_f0c39857-30a6-4b91-a18d-02afaa6a4394/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c39857-30a6-4b91-a18d-02afaa6a4394/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c2b7377d2b430a15e16457512411598a883b6588c528bba211e64f887de4d8e [2022-12-14 08:30:39,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:30:39,366 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:30:39,368 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:30:39,369 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:30:39,369 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:30:39,370 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c39857-30a6-4b91-a18d-02afaa6a4394/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/ldv-regression/test23-1.c [2022-12-14 08:30:42,000 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:30:42,124 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:30:42,124 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c39857-30a6-4b91-a18d-02afaa6a4394/sv-benchmarks/c/ldv-regression/test23-1.c [2022-12-14 08:30:42,128 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c39857-30a6-4b91-a18d-02afaa6a4394/bin/utaipan-gh47qXpMRh/data/8591db48a/025c877684524a87a240eab37dc2b284/FLAG49b5b56a0 [2022-12-14 08:30:42,139 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c39857-30a6-4b91-a18d-02afaa6a4394/bin/utaipan-gh47qXpMRh/data/8591db48a/025c877684524a87a240eab37dc2b284 [2022-12-14 08:30:42,140 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:30:42,141 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:30:42,142 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:30:42,142 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:30:42,145 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:30:42,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:30:42" (1/1) ... [2022-12-14 08:30:42,146 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38071819 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:30:42, skipping insertion in model container [2022-12-14 08:30:42,146 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:30:42" (1/1) ... [2022-12-14 08:30:42,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:30:42,163 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:30:42,277 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_f0c39857-30a6-4b91-a18d-02afaa6a4394/sv-benchmarks/c/ldv-regression/test23-1.c[1075,1088] [2022-12-14 08:30:42,280 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:30:42,288 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:30:42,301 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_f0c39857-30a6-4b91-a18d-02afaa6a4394/sv-benchmarks/c/ldv-regression/test23-1.c[1075,1088] [2022-12-14 08:30:42,302 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:30:42,312 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:30:42,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:30:42 WrapperNode [2022-12-14 08:30:42,312 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:30:42,313 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:30:42,313 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:30:42,313 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:30:42,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:30:42" (1/1) ... [2022-12-14 08:30:42,324 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:30:42" (1/1) ... [2022-12-14 08:30:42,338 INFO L138 Inliner]: procedures = 16, calls = 21, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2022-12-14 08:30:42,338 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:30:42,338 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:30:42,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:30:42,339 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:30:42,345 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:30:42" (1/1) ... [2022-12-14 08:30:42,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:30:42" (1/1) ... [2022-12-14 08:30:42,347 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:30:42" (1/1) ... [2022-12-14 08:30:42,347 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:30:42" (1/1) ... [2022-12-14 08:30:42,351 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:30:42" (1/1) ... [2022-12-14 08:30:42,353 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:30:42" (1/1) ... [2022-12-14 08:30:42,354 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:30:42" (1/1) ... [2022-12-14 08:30:42,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:30:42" (1/1) ... [2022-12-14 08:30:42,356 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:30:42,357 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:30:42,357 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:30:42,357 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:30:42,358 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:30:42" (1/1) ... [2022-12-14 08:30:42,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:30:42,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c39857-30a6-4b91-a18d-02afaa6a4394/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:30:42,381 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c39857-30a6-4b91-a18d-02afaa6a4394/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:30:42,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c39857-30a6-4b91-a18d-02afaa6a4394/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:30:42,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:30:42,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 08:30:42,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 08:30:42,417 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2022-12-14 08:30:42,417 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2022-12-14 08:30:42,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:30:42,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:30:42,418 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 08:30:42,482 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:30:42,483 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:30:42,596 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:30:42,632 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:30:42,632 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 08:30:42,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:30:42 BoogieIcfgContainer [2022-12-14 08:30:42,635 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:30:42,637 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:30:42,637 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:30:42,639 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:30:42,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:30:42" (1/3) ... [2022-12-14 08:30:42,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19b993d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:30:42, skipping insertion in model container [2022-12-14 08:30:42,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:30:42" (2/3) ... [2022-12-14 08:30:42,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19b993d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:30:42, skipping insertion in model container [2022-12-14 08:30:42,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:30:42" (3/3) ... [2022-12-14 08:30:42,641 INFO L112 eAbstractionObserver]: Analyzing ICFG test23-1.c [2022-12-14 08:30:42,657 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:30:42,657 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 08:30:42,706 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:30:42,713 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;@567d0cc5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:30:42,713 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 08:30:42,717 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 08:30:42,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 08:30:42,727 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:30:42,727 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:30:42,728 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:30:42,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:30:42,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1953466018, now seen corresponding path program 1 times [2022-12-14 08:30:42,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:30:42,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995694400] [2022-12-14 08:30:42,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:30:42,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:30:42,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:30:42,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 08:30:42,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:30:42,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995694400] [2022-12-14 08:30:42,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995694400] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:30:42,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:30:42,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:30:42,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017996991] [2022-12-14 08:30:42,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:30:42,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 08:30:42,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:30:42,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 08:30:42,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 08:30:42,966 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 08:30:42,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:30:42,995 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2022-12-14 08:30:42,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 08:30:42,998 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2022-12-14 08:30:42,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:30:43,005 INFO L225 Difference]: With dead ends: 24 [2022-12-14 08:30:43,005 INFO L226 Difference]: Without dead ends: 14 [2022-12-14 08:30:43,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 08:30:43,012 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:30:43,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:30:43,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-12-14 08:30:43,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-12-14 08:30:43,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 08:30:43,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-12-14 08:30:43,040 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 14 [2022-12-14 08:30:43,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:30:43,042 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-12-14 08:30:43,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 08:30:43,042 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-12-14 08:30:43,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 08:30:43,043 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:30:43,044 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:30:43,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 08:30:43,044 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:30:43,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:30:43,045 INFO L85 PathProgramCache]: Analyzing trace with hash -435187080, now seen corresponding path program 1 times [2022-12-14 08:30:43,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:30:43,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166475402] [2022-12-14 08:30:43,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:30:43,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:30:43,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:30:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 08:30:43,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:30:43,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166475402] [2022-12-14 08:30:43,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166475402] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:30:43,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:30:43,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:30:43,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275657704] [2022-12-14 08:30:43,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:30:43,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:30:43,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:30:43,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:30:43,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:30:43,418 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 08:30:43,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:30:43,455 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2022-12-14 08:30:43,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:30:43,455 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2022-12-14 08:30:43,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:30:43,456 INFO L225 Difference]: With dead ends: 20 [2022-12-14 08:30:43,456 INFO L226 Difference]: Without dead ends: 16 [2022-12-14 08:30:43,457 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 [2022-12-14 08:30:43,458 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:30:43,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 24 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:30:43,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-12-14 08:30:43,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-12-14 08:30:43,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 08:30:43,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-12-14 08:30:43,463 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 15 [2022-12-14 08:30:43,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:30:43,464 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-12-14 08:30:43,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 08:30:43,464 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-12-14 08:30:43,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 08:30:43,465 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:30:43,465 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:30:43,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 08:30:43,465 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:30:43,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:30:43,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1574645037, now seen corresponding path program 1 times [2022-12-14 08:30:43,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:30:43,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670428691] [2022-12-14 08:30:43,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:30:43,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:30:43,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:30:43,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 08:30:43,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:30:43,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670428691] [2022-12-14 08:30:43,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670428691] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:30:43,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593610292] [2022-12-14 08:30:43,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:30:43,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:30:43,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c39857-30a6-4b91-a18d-02afaa6a4394/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:30:43,691 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c39857-30a6-4b91-a18d-02afaa6a4394/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:30:43,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c39857-30a6-4b91-a18d-02afaa6a4394/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:30:43,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:30:43,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 08:30:43,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:30:43,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 08:30:43,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-14 08:30:43,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 08:30:43,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:30:44,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 08:30:44,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593610292] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:30:44,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1132258529] [2022-12-14 08:30:44,064 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 08:30:44,064 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:30:44,068 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:30:44,073 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:30:44,073 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:30:44,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:30:44,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 44 [2022-12-14 08:30:44,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:30:44,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:30:44,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:30:44,793 INFO L321 Elim1Store]: treesize reduction 99, result has 28.8 percent of original size [2022-12-14 08:30:44,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 419 treesize of output 439 [2022-12-14 08:30:45,285 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 24 treesize of output 23 [2022-12-14 08:30:47,186 INFO L197 IcfgInterpreter]: Interpreting procedure get_dummy with input of size 88 for LOIs [2022-12-14 08:30:47,202 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:30:48,361 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '240#(and (= |~#d2~0.offset| 0) (= |ULTIMATE.start_check_~s1#1.offset| |ULTIMATE.start_check_#in~s1#1.offset|) (= |~#d1~0.base| 4) (= (ite (= (select (select |#memory_int| |ULTIMATE.start_check_~s1#1.base|) (+ (* 4 |ULTIMATE.start_check_~i#1|) |ULTIMATE.start_check_~s1#1.offset| 8)) |ULTIMATE.start_check_~i#1|) 1 0) |ULTIMATE.start_check_#res#1|) (= 5 |~#d2~0.base|) (= |ULTIMATE.start_check_#in~i#1| |ULTIMATE.start_check_~i#1|) (= |ULTIMATE.start_check_#in~s1#1.base| |ULTIMATE.start_check_~s1#1.base|) (< (select (select |#memory_int| |ULTIMATE.start_main_~pa~0#1.base|) |ULTIMATE.start_main_~pa~0#1.offset|) |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_check_#in~i#1|) (= |ULTIMATE.start_check_#in~s1#1.base| |ULTIMATE.start_main_~pd2~0#1.base|) (= |ULTIMATE.start_check_#in~s1#1.offset| |ULTIMATE.start_main_~pd2~0#1.offset|) (= |~#d1~0.offset| 0) (= |#NULL.offset| 0) (= 0 |ULTIMATE.start_check_#res#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:30:48,361 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:30:48,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:30:48,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-12-14 08:30:48,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356843692] [2022-12-14 08:30:48,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:30:48,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 08:30:48,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:30:48,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 08:30:48,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-12-14 08:30:48,364 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 08:30:48,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:30:48,459 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-12-14 08:30:48,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 08:30:48,460 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-12-14 08:30:48,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:30:48,461 INFO L225 Difference]: With dead ends: 26 [2022-12-14 08:30:48,461 INFO L226 Difference]: Without dead ends: 22 [2022-12-14 08:30:48,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2022-12-14 08:30:48,462 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 3 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:30:48,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 45 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:30:48,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-14 08:30:48,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-12-14 08:30:48,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 08:30:48,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-12-14 08:30:48,465 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2022-12-14 08:30:48,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:30:48,465 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-12-14 08:30:48,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 08:30:48,465 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-12-14 08:30:48,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 08:30:48,466 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:30:48,466 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:30:48,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c39857-30a6-4b91-a18d-02afaa6a4394/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:30:48,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c39857-30a6-4b91-a18d-02afaa6a4394/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-14 08:30:48,668 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:30:48,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:30:48,669 INFO L85 PathProgramCache]: Analyzing trace with hash -681618588, now seen corresponding path program 2 times [2022-12-14 08:30:48,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:30:48,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259553574] [2022-12-14 08:30:48,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:30:48,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:30:48,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:30:48,903 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 08:30:48,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:30:48,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259553574] [2022-12-14 08:30:48,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259553574] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:30:48,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657815319] [2022-12-14 08:30:48,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:30:48,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:30:48,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c39857-30a6-4b91-a18d-02afaa6a4394/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:30:48,905 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c39857-30a6-4b91-a18d-02afaa6a4394/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:30:48,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c39857-30a6-4b91-a18d-02afaa6a4394/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 08:30:48,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 08:30:48,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:30:48,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 08:30:48,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:30:48,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 08:30:49,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-14 08:30:49,091 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 08:30:49,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:30:49,163 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 08:30:49,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657815319] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:30:49,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1372510282] [2022-12-14 08:30:49,165 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 08:30:49,166 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:30:49,166 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:30:49,166 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:30:49,166 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:30:49,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:30:49,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 44 [2022-12-14 08:30:49,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:30:49,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:30:49,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:30:49,601 INFO L321 Elim1Store]: treesize reduction 99, result has 28.8 percent of original size [2022-12-14 08:30:49,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 419 treesize of output 439 [2022-12-14 08:30:49,771 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 24 treesize of output 23 [2022-12-14 08:30:51,543 INFO L197 IcfgInterpreter]: Interpreting procedure get_dummy with input of size 88 for LOIs [2022-12-14 08:30:51,558 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:30:52,556 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '477#(and (= |~#d2~0.offset| 0) (= |ULTIMATE.start_check_~s1#1.offset| |ULTIMATE.start_check_#in~s1#1.offset|) (= |~#d1~0.base| 4) (= (ite (= (select (select |#memory_int| |ULTIMATE.start_check_~s1#1.base|) (+ (* 4 |ULTIMATE.start_check_~i#1|) |ULTIMATE.start_check_~s1#1.offset| 8)) |ULTIMATE.start_check_~i#1|) 1 0) |ULTIMATE.start_check_#res#1|) (= 5 |~#d2~0.base|) (= |ULTIMATE.start_check_#in~i#1| |ULTIMATE.start_check_~i#1|) (= |ULTIMATE.start_check_#in~s1#1.base| |ULTIMATE.start_check_~s1#1.base|) (< (select (select |#memory_int| |ULTIMATE.start_main_~pa~0#1.base|) |ULTIMATE.start_main_~pa~0#1.offset|) |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_check_#in~i#1|) (= |ULTIMATE.start_check_#in~s1#1.base| |ULTIMATE.start_main_~pd2~0#1.base|) (= |ULTIMATE.start_check_#in~s1#1.offset| |ULTIMATE.start_main_~pd2~0#1.offset|) (= |~#d1~0.offset| 0) (= |#NULL.offset| 0) (= 0 |ULTIMATE.start_check_#res#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:30:52,556 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:30:52,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:30:52,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-12-14 08:30:52,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709234954] [2022-12-14 08:30:52,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:30:52,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 08:30:52,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:30:52,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 08:30:52,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2022-12-14 08:30:52,559 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 08:30:52,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:30:52,730 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2022-12-14 08:30:52,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 08:30:52,730 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-12-14 08:30:52,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:30:52,731 INFO L225 Difference]: With dead ends: 38 [2022-12-14 08:30:52,731 INFO L226 Difference]: Without dead ends: 34 [2022-12-14 08:30:52,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=284, Invalid=1048, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 08:30:52,733 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 3 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:30:52,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 52 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:30:52,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-12-14 08:30:52,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-12-14 08:30:52,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 08:30:52,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-12-14 08:30:52,736 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 23 [2022-12-14 08:30:52,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:30:52,737 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-12-14 08:30:52,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 08:30:52,737 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-12-14 08:30:52,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 08:30:52,737 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:30:52,737 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:30:52,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c39857-30a6-4b91-a18d-02afaa6a4394/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 08:30:52,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c39857-30a6-4b91-a18d-02afaa6a4394/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:30:52,939 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:30:52,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:30:52,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1764584890, now seen corresponding path program 3 times [2022-12-14 08:30:52,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:30:52,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515501946] [2022-12-14 08:30:52,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:30:52,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:30:52,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:30:53,232 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 08:30:53,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:30:53,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515501946] [2022-12-14 08:30:53,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515501946] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:30:53,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276751712] [2022-12-14 08:30:53,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 08:30:53,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:30:53,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c39857-30a6-4b91-a18d-02afaa6a4394/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:30:53,234 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c39857-30a6-4b91-a18d-02afaa6a4394/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:30:53,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c39857-30a6-4b91-a18d-02afaa6a4394/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 08:30:53,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 08:30:53,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:30:53,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 08:30:53,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:30:53,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 08:30:53,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 08:30:53,479 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 08:30:53,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:30:53,579 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 08:30:53,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276751712] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:30:53,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [202371523] [2022-12-14 08:30:53,582 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-12-14 08:30:53,582 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:30:53,582 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:30:53,582 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:30:53,582 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:30:53,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:30:53,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 44 [2022-12-14 08:30:53,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:30:53,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:30:53,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:30:53,977 INFO L321 Elim1Store]: treesize reduction 99, result has 28.8 percent of original size [2022-12-14 08:30:53,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 419 treesize of output 439 [2022-12-14 08:30:54,168 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 24 treesize of output 23 [2022-12-14 08:30:56,175 INFO L197 IcfgInterpreter]: Interpreting procedure get_dummy with input of size 88 for LOIs [2022-12-14 08:30:56,185 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:30:57,178 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '835#(and (= |~#d2~0.offset| 0) (= |ULTIMATE.start_check_~s1#1.offset| |ULTIMATE.start_check_#in~s1#1.offset|) (= |~#d1~0.base| 4) (= (ite (= (select (select |#memory_int| |ULTIMATE.start_check_~s1#1.base|) (+ (* 4 |ULTIMATE.start_check_~i#1|) |ULTIMATE.start_check_~s1#1.offset| 8)) |ULTIMATE.start_check_~i#1|) 1 0) |ULTIMATE.start_check_#res#1|) (= 5 |~#d2~0.base|) (= |ULTIMATE.start_check_#in~i#1| |ULTIMATE.start_check_~i#1|) (= |ULTIMATE.start_check_#in~s1#1.base| |ULTIMATE.start_check_~s1#1.base|) (< (select (select |#memory_int| |ULTIMATE.start_main_~pa~0#1.base|) |ULTIMATE.start_main_~pa~0#1.offset|) |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_check_#in~i#1|) (= |ULTIMATE.start_check_#in~s1#1.base| |ULTIMATE.start_main_~pd2~0#1.base|) (= |ULTIMATE.start_check_#in~s1#1.offset| |ULTIMATE.start_main_~pd2~0#1.offset|) (= |~#d1~0.offset| 0) (= |#NULL.offset| 0) (= 0 |ULTIMATE.start_check_#res#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:30:57,179 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:30:57,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:30:57,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 17 [2022-12-14 08:30:57,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938005739] [2022-12-14 08:30:57,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:30:57,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 08:30:57,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:30:57,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 08:30:57,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2022-12-14 08:30:57,181 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 08:30:57,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:30:57,331 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2022-12-14 08:30:57,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 08:30:57,332 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2022-12-14 08:30:57,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:30:57,332 INFO L225 Difference]: With dead ends: 40 [2022-12-14 08:30:57,332 INFO L226 Difference]: Without dead ends: 36 [2022-12-14 08:30:57,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 81 SyntacticMatches, 11 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=331, Invalid=1151, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 08:30:57,333 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:30:57,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 45 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:30:57,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-12-14 08:30:57,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-12-14 08:30:57,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 08:30:57,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-12-14 08:30:57,337 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 35 [2022-12-14 08:30:57,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:30:57,337 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-12-14 08:30:57,337 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 08:30:57,337 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-12-14 08:30:57,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 08:30:57,338 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:30:57,338 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:30:57,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c39857-30a6-4b91-a18d-02afaa6a4394/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 08:30:57,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c39857-30a6-4b91-a18d-02afaa6a4394/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:30:57,539 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:30:57,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:30:57,540 INFO L85 PathProgramCache]: Analyzing trace with hash 774313761, now seen corresponding path program 4 times [2022-12-14 08:30:57,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:30:57,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143978664] [2022-12-14 08:30:57,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:30:57,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:30:57,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 08:30:57,574 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 08:30:57,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 08:30:57,603 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 08:30:57,603 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 08:30:57,604 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-14 08:30:57,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 08:30:57,608 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1] [2022-12-14 08:30:57,610 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 08:30:57,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 08:30:57 BoogieIcfgContainer [2022-12-14 08:30:57,636 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 08:30:57,636 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 08:30:57,636 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 08:30:57,636 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 08:30:57,637 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:30:42" (3/4) ... [2022-12-14 08:30:57,638 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-14 08:30:57,672 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c39857-30a6-4b91-a18d-02afaa6a4394/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 08:30:57,672 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 08:30:57,673 INFO L158 Benchmark]: Toolchain (without parser) took 15531.50ms. Allocated memory was 123.7MB in the beginning and 262.1MB in the end (delta: 138.4MB). Free memory was 83.5MB in the beginning and 85.2MB in the end (delta: -1.7MB). Peak memory consumption was 137.8MB. Max. memory is 16.1GB. [2022-12-14 08:30:57,673 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 123.7MB. Free memory was 66.4MB in the beginning and 66.3MB in the end (delta: 140.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 08:30:57,674 INFO L158 Benchmark]: CACSL2BoogieTranslator took 170.37ms. Allocated memory is still 123.7MB. Free memory was 83.1MB in the beginning and 72.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 08:30:57,674 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.77ms. Allocated memory is still 123.7MB. Free memory was 72.6MB in the beginning and 70.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 08:30:57,674 INFO L158 Benchmark]: Boogie Preprocessor took 17.78ms. Allocated memory is still 123.7MB. Free memory was 70.8MB in the beginning and 69.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 08:30:57,674 INFO L158 Benchmark]: RCFGBuilder took 278.06ms. Allocated memory is still 123.7MB. Free memory was 69.5MB in the beginning and 55.5MB in the end (delta: 14.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-12-14 08:30:57,675 INFO L158 Benchmark]: TraceAbstraction took 14999.30ms. Allocated memory was 123.7MB in the beginning and 262.1MB in the end (delta: 138.4MB). Free memory was 54.5MB in the beginning and 88.3MB in the end (delta: -33.8MB). Peak memory consumption was 106.4MB. Max. memory is 16.1GB. [2022-12-14 08:30:57,675 INFO L158 Benchmark]: Witness Printer took 36.37ms. Allocated memory is still 262.1MB. Free memory was 88.3MB in the beginning and 85.2MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 08:30:57,677 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 123.7MB. Free memory was 66.4MB in the beginning and 66.3MB in the end (delta: 140.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 170.37ms. Allocated memory is still 123.7MB. Free memory was 83.1MB in the beginning and 72.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.77ms. Allocated memory is still 123.7MB. Free memory was 72.6MB in the beginning and 70.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.78ms. Allocated memory is still 123.7MB. Free memory was 70.8MB in the beginning and 69.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 278.06ms. Allocated memory is still 123.7MB. Free memory was 69.5MB in the beginning and 55.5MB in the end (delta: 14.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 14999.30ms. Allocated memory was 123.7MB in the beginning and 262.1MB in the end (delta: 138.4MB). Free memory was 54.5MB in the beginning and 88.3MB in the end (delta: -33.8MB). Peak memory consumption was 106.4MB. Max. memory is 16.1GB. * Witness Printer took 36.37ms. Allocated memory is still 262.1MB. Free memory was 88.3MB in the beginning and 85.2MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 52]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] struct dummy d1, d2; [L35] CALL init() [L16] d1.a = __VERIFIER_nondet_int() [L17] d1.b = __VERIFIER_nondet_int() [L19] d2.a = __VERIFIER_nondet_int() [L20] d2.b = __VERIFIER_nondet_int() [L35] RET init() [L36] CALL, EXPR get_dummy() VAL [d1={4:0}, d2={5:0}] [L25] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L36] RET, EXPR get_dummy() VAL [d1={4:0}, d2={5:0}, get_dummy()={4:0}] [L36] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(); [L36] CALL, EXPR get_dummy() VAL [d1={4:0}, d2={5:0}] [L25] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L36] RET, EXPR get_dummy() VAL [d1={4:0}, d2={5:0}, get_dummy()={4:0}, pd1={4:0}] [L36] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(); [L37] int i = __VERIFIER_nondet_int(); [L38] COND TRUE pd1 != 0 && pd1 == pd2 && i >= 0 && i < 10 [L39] pd2->array[i] = i [L40] int *pa = &pd1->array[i]; [L41] EXPR pd2->array[i] [L41] i = pd2->array[i] - 10 [L42] EXPR \read(*pa) VAL [\read(*pa)=6, d1={4:0}, d2={5:0}, i=-4, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={4:0}, d2={5:0}, i=-3, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] EXPR \read(*pa) VAL [\read(*pa)=6, d1={4:0}, d2={5:0}, i=-3, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={4:0}, d2={5:0}, i=-2, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] EXPR \read(*pa) VAL [\read(*pa)=6, d1={4:0}, d2={5:0}, i=-2, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={4:0}, d2={5:0}, i=-1, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] EXPR \read(*pa) VAL [\read(*pa)=6, d1={4:0}, d2={5:0}, i=-1, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={4:0}, d2={5:0}, i=0, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] EXPR \read(*pa) VAL [\read(*pa)=6, d1={4:0}, d2={5:0}, i=0, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={4:0}, d2={5:0}, i=1, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] EXPR \read(*pa) VAL [\read(*pa)=6, d1={4:0}, d2={5:0}, i=1, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={4:0}, d2={5:0}, i=2, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] EXPR \read(*pa) VAL [\read(*pa)=6, d1={4:0}, d2={5:0}, i=2, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={4:0}, d2={5:0}, i=3, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] EXPR \read(*pa) VAL [\read(*pa)=6, d1={4:0}, d2={5:0}, i=3, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={4:0}, d2={5:0}, i=4, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] EXPR \read(*pa) VAL [\read(*pa)=6, d1={4:0}, d2={5:0}, i=4, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={4:0}, d2={5:0}, i=5, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] EXPR \read(*pa) VAL [\read(*pa)=6, d1={4:0}, d2={5:0}, i=5, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={4:0}, d2={5:0}, i=6, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] EXPR \read(*pa) VAL [\read(*pa)=6, d1={4:0}, d2={5:0}, i=6, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] COND TRUE i <= *pa [L43] ++i VAL [d1={4:0}, d2={5:0}, i=7, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] EXPR \read(*pa) VAL [\read(*pa)=6, d1={4:0}, d2={5:0}, i=7, pa={4:32}, pd1={4:0}, pd2={4:0}] [L42] COND FALSE !(i <= *pa) [L45] CALL, EXPR check(pd2, i) [L30] EXPR s1->array[i] [L30] return s1->array[i] == i; [L45] RET, EXPR check(pd2, i) [L45] COND TRUE !check(pd2, i) [L52] reach_error() VAL [d1={4:0}, d2={5:0}, i=7, pa={4:32}, pd1={4:0}, pd2={4:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 14.9s, OverallIterations: 6, TraceHistogramMax: 12, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9 mSDsluCounter, 181 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 126 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 189 IncrementalHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 55 mSDtfsCounter, 189 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 281 GetRequests, 170 SyntacticMatches, 13 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 4.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=5, InterpolantAutomatonStates: 62, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 216 NumberOfCodeBlocks, 211 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 243 ConstructedInterpolants, 6 QuantifiedInterpolants, 1211 SizeOfPredicates, 37 NumberOfNonLiveVariables, 414 ConjunctsInSsa, 62 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 22/418 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-12-14 08:30:57,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0c39857-30a6-4b91-a18d-02afaa6a4394/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE